Longmont Climate & Monthly Temperature Overview – United States

Spring and Summer in Longmont

Longmont, located in Colorado, experiences a continental climate with four distinct seasons. Spring in Longmont arrives in March, bringing with it mild temperatures and occasional precipitation. As the season progresses, temperatures gradually rise, and precipitation becomes less frequent. By May, the average high temperature has reached 70°F (21°C), and the average low temperature is around 40°F (4°C).

Summer in Longmont lasts from June to August and is characterized by hot and dry conditions. The average high temperature in July, the warmest month, is approximately 90°F (32°C), while the average low temperature is around 60°F (16°C). Precipitation is infrequent during the summer months, occurring mostly in the form of brief showers or thunderstorms.

Fall and Winter in Longmont

Fall in Longmont begins in September and brings with it cooler temperatures and decreasing amounts of precipitation. The average high temperature in September is around 80°F (27°C), while the average low temperature is approximately 50°F (10°C). As the season progresses, temperatures continue to drop, and precipitation becomes more frequent. By November, the average high temperature has fallen to 60°F (16°C), and the average low temperature is around 30°F (-1°C).

Winter in Longmont lasts from December to February and is known for its cold and snowy conditions. The average high temperature in January, the coldest month, is around 40°F (4°C), while the average low temperature is approximately 20°F (-7°C). Snowfall is common during the winter months, with an average of 20 inches (51 cm) of snow falling each year.

Summer Temperatures in Longmont, United States

Longmont, located in the northern part of Colorado, United States, experiences warm summers with average temperatures ranging between 75°F (24°C) and 90°F (32°C). The hottest month is July, with an average high of 90°F (32°C) and an average low of 66°F (19°C). The humidity levels during this time are relatively low, making the heat feel more tolerable. However, occasional thunderstorms and brief periods of heavy rain can occur during the summer months, providing relief from the heat.

Winter Temperatures in Longmont, United States

Winters in Longmont are cold and dry, with average temperatures ranging between 20°F (-7°C) and 45°F (7°C). The coldest month is January, with an average high of 41°F (5°C) and an average low of 18°F (-8°C). Snowfall is common during the winter months, and the city receives an average of 16 inches (41 centimeters) of snow per year. While temperatures can drop below freezing at night, the sunny days and low humidity levels make it comfortable to spend time outdoors during the winter months.

Cloud Types in Longmont

Longmont, Colorado, experiences a diverse range of cloud formations throughout the year. Cumulus clouds, characterized by their puffy, cotton-ball appearance, are common in the summer months. These clouds often indicate fair weather but can also develop into thunderclouds. Stratus clouds, which appear as a thin, gray layer covering the sky, are common during the winter and can bring light rain or snow. Cirrus clouds, composed of thin, wispy fibers, are often seen high in the atmosphere and indicate stable weather conditions.

Cloud Formation and Impact on Weather

Clouds form when warm, moist air rises and cools, causing water vapor to condense into tiny droplets or ice crystals. The type of cloud that forms depends on the temperature and humidity of the air, as well as the presence of atmospheric disturbances. Clouds play a crucial role in the Earth’s weather system by regulating temperature, reflecting solar radiation, and producing precipitation. In Longmont, clouds can affect the amount of sunlight reaching the ground, influencing local temperatures and plant growth. Additionally, clouds can produce rain, snow, or hail, which can have significant impacts on human activities such as agriculture and transportation.

Annual Precipitation

Longmont, Colorado experiences an average annual precipitation of approximately 14.3 inches (363 millimeters), distributed relatively evenly throughout the year. The wettest month is May, with an average of 2.5 inches (63 millimeters) of precipitation, followed by July with 2.3 inches (58 millimeters). The driest month is December, with an average of 0.4 inches (10 millimeters) of precipitation.

Seasonal Precipitation Patterns

Longmont’s precipitation patterns exhibit seasonal variations. During spring (March-May), precipitation tends to increase as temperatures rise and the air becomes more humid. Summer (June-August) brings frequent thunderstorms, contributing to higher precipitation. In autumn (September-November), precipitation gradually decreases, and by winter (December-February), it reaches its lowest point. The winter months are characterized by cold temperatures and a decrease in moisture in the air, leading to less precipitation.

Seasonal Rainfall Patterns

Longmont, Colorado experiences distinct seasonal rainfall patterns. During the winter months, precipitation is generally low, with average monthly rainfall below 1 inch. As spring approaches, rainfall gradually increases, peaking in May and June when Longmont receives an average of 3-4 inches of rain per month. This increase in precipitation is attributed to the influence of the North American Monsoon system, which brings moisture from the Gulf of Mexico into the western United States.

Summer and Autumn Rainfall

Summer months in Longmont are typically the wettest, with frequent thunderstorms and heavier rainfall. July is the wettest month, with an average of 3.5 inches of rain. The frequency and intensity of thunderstorms diminish towards the end of summer, and rainfall decreases in September and October. By November, Longmont transitions into its dry period, with average monthly rainfall dropping below 1 inch, signaling the end of the active rainfall season.

Historical Snowfall Patterns

Longmont, Colorado, experiences moderate annual snowfall, with an average of 24.8 inches recorded over the past 30 years. Seasonal variations are significant, with the bulk of snowfall occurring between November and March. The snowiest month is typically January, averaging 7.2 inches. Snowfall can range widely from year to year, with some winters receiving significantly more accumulation than others. For instance, during the 2018-2019 winter, Longmont recorded a record 60.3 inches of snowfall, while the 2019-2020 winter saw only 10.9 inches.

Impact on the Community

Snowfall has both positive and negative impacts on the Longmont community. On the one hand, it provides ample opportunities for winter recreation, such as sledding, snowshoeing, and skiing. The city maintains several parks and trails specifically designed for winter activities, allowing residents to enjoy the snowy landscape safely and conveniently. Snowfall can also bring a sense of wonder and beauty to Longmont, transforming the city into a winter wonderland.

On the other hand, snowfall can also pose challenges for transportation, infrastructure, and public services. During heavy snowstorms, roads can become impassable, leading to delays and cancellations. Snow removal and salting operations require significant resources and can disrupt daily routines. Additionally, extreme snowfall can put a strain on infrastructure, potentially causing power outages and damage to buildings and roads.

Sun Exposure in Longmont, Colorado

Longmont, Colorado enjoys a relatively sunny climate with an average of 300 sunny days per year. The city receives an average of 2,800 sunshine hours annually, placing it among the top 10% of cities in the United States for total sunlight. The sunniest months are May through September, with an average of over 10 hours of sunshine per day. During these months, the sun rises around 6:00 AM and sets around 8:00 PM, providing ample daylight for outdoor activities and solar energy production.

Seasonal Variations in Sunlight

The amount of sunlight Longmont receives varies significantly throughout the year. During the winter months, December through February, the city experiences the shortest days and least amount of sunlight. The sun rises around 7:00 AM and sets around 5:00 PM, resulting in an average of only 5-6 hours of sunshine per day. In contrast, during the summer months, June through August, the city experiences the longest days and most sunlight. The sun rises around 5:00 AM and sets around 9:00 PM, providing over 14 hours of sunshine per day. These seasonal variations in sunlight impact the local climate, tourism, and solar energy production.

Lunar Visibility in Longmont, United States

Longmont, Colorado, United States, is known for its clear skies and favorable conditions for stargazing. The Moon, Earth’s celestial neighbor, is well visible from Longmont, offering stunning celestial views. Throughout the month, the Moon undergoes different phases, each characterized by its unique appearance and illumination. During the new moon phase, the Moon is not visible as it lies between the Earth and the Sun. As the month progresses, the crescent moon emerges, gradually growing in size and brightness until it reaches the first quarter phase.

The full moon is the most prominent and captivating phase, when the entire face of the Moon is illuminated by sunlight. It rises in the east at sunset and sets in the west at sunrise, providing ample time for observation. The full moon is often associated with folklore, mythology, and cultural practices around the world. During the waning moon phases, the Moon gradually decreases in size and brightness until it reaches the last quarter phase. From this point, the Moon enters the crescent phase again, completing its cycle.

Humidity in Longmont, United States

Longmont, Colorado experiences significant seasonal variations in humidity. Summer months (June-August) are typically hot and humid with average dew points in the mid-50s (°F). In July, the average relative humidity ranges from 45% in the afternoon to 90% in the morning. During this time, muggy conditions can cause discomfort and heat-related illnesses.

In contrast, winter months (December-February) are cold and dry with average dew points below 20°F. In January, the average relative humidity drops to 30% in the afternoon, creating a crisp and arid atmosphere. Cold, dry air can lead to dry skin and respiratory issues.

Overall, Longmont has a humid continental climate characterized by warm, humid summers and cold, dry winters. The seasonal fluctuations in humidity impact the comfort and well-being of the city’s residents.

Wind Patterns and Speed

Longmont, Colorado, experiences varying wind patterns and speeds throughout the year. During the spring and summer months, the prevailing winds are generally from the southwest, bringing warm and dry air from the higher elevations of the Rocky Mountains. These winds typically reach speeds of 10-15 miles per hour (mph) during the day and diminish at night.

In the fall and winter, the wind direction shifts to the northwest, bringing cooler and more humid air from the Pacific Ocean. Wind speeds during this period tend to be higher, with gusts exceeding 20 mph on occasion. These winds often help to clear out any lingering smog or pollutants, resulting in improved air quality.

Seasonal Variations

The wind patterns in Longmont are influenced by the seasonal temperature differences. During the warmer months, the heated air rises, creating low-pressure areas over the land. This draws in cooler, denser air from the mountains, resulting in the prevailing southwesterly winds. In the colder months, the land surface cools more rapidly than the ocean, creating a high-pressure area over the continent. This draws in cold, dry air from the northwest, resulting in the shift in wind direction.

Impacts on Local Climate

The wind patterns in Longmont have a significant impact on the local climate. The prevailing southwesterly winds during the spring and summer months contribute to the city’s relatively warm and dry conditions. These winds help to evaporate moisture from the soil and keep temperatures moderate. In contrast, the northwesterly winds during the fall and winter months bring cooler and more humid air, resulting in colder temperatures and occasional snowfall. Overall, the wind patterns in Longmont contribute to the city’s diverse and often unpredictable climate.

Spring (April-May)

Spring in Longmont brings warm days and blooming flowers. Temperatures range from a comfortable 40°F (4°C) to 60°F (15°C), making it ideal for outdoor activities. The city transforms into a vibrant canvas as parks and gardens burst into a kaleidoscope of colors. Local farmers’ markets showcase fresh produce, artisan crafts, and live entertainment. Additionally, the Longmont Tulip Festival, held annually in May, offers a breathtaking display of over 150,000 tulips.

Summer (June-August)

Summer in Longmont offers a delightful balance of warmth and sunshine. Temperatures average between 65°F (18°C) and 85°F (29°C), providing ample opportunities for outdoor recreation. The city hosts a series of summer events, including the Longmont Summerfest, which features live music, food vendors, and family-friendly activities. For nature enthusiasts, the nearby Rocky Mountain National Park and Estes Park offer breathtaking scenery and hiking trails.

Solar Energy Potential

Longmont, Colorado, located in the sun-drenched Rocky Mountain Front Range, boasts an exceptional solar energy potential. With an average of over 300 sunny days per year and an abundance of rooftop space, the city offers prime conditions for solar installations. The city government actively supports solar development, and residents benefit from favorable net metering policies and rebates.

Residential Adoption

Solar energy has become increasingly popular in Longmont, with a significant number of homes equipped with solar panels. Homeowners appreciate the environmental benefits, reduced energy costs, and increased property value associated with solar systems. The city’s commitment to sustainability, combined with the availability of local installers and financial incentives, has fostered a thriving residential solar market. Additionally, community-based organizations and local businesses are actively involved in promoting solar energy adoption, contributing to Longmont’s reputation as a leader in renewable energy.

Northern Foothills

Longmont’s northern boundary is marked by the foothills of the Rocky Mountains, which gradually rise towards the west. These foothills comprise rolling hills, steep slopes, and flat-topped mesas, creating a diverse and picturesque landscape. The highest point in Longmont, Coal Creek Peak, at 1,863 feet, offers panoramic views of the surrounding area, including the Front Range and the Great Plains.

Central Plains

The central region of Longmont lies within the Great Plains, characterized by relatively flat terrain and gently sloping hills. This area is primarily utilized for agriculture, as the fertile soil and ample water resources support a variety of crops. The plains also contain numerous ephemeral streams and seasonal wetlands, providing habitat for wildlife and contributing to the ecological diversity of the region.

Southern Terraces

The southern portion of Longmont consists of a series of terraces, which were formed by the erosion of the Front Range over time. These terraces are elevated above the Great Plains, creating a gradual transition from the mountains to the plains. The terraces provide excellent drainage and are ideal for residential and commercial development. Many of Longmont’s neighborhoods and commercial areas are located on these terraces, including the historic downtown area and the vibrant Prospect neighborhood.

Denver International Airport (DEN)

Denver International Airport (DEN) is the nearest airport to Longmont, Colorado, located approximately 30 miles south of the city. DEN is a major international airport serving the Denver metropolitan area and is the fifth-busiest airport in the United States. It offers a wide range of domestic and international flights, connecting Longmont to destinations across the country and around the world.

Getting to Longmont from Denver International Airport

There are several options for getting to Longmont from Denver International Airport. Travelers can take a taxi or ride-sharing service, which typically takes around 45 minutes and costs approximately $70. Alternatively, the Regional Transportation District (RTD) offers a bus service that runs from the airport to downtown Denver, where passengers can transfer to a connecting bus to Longmont. The bus ride takes about 1 hour and 45 minutes and costs around $15.

Historical Significance

Longmont, Colorado, was established in 1871 as a colony of the Chicago, Burlington, and Quincy Railroad. Named after the railroad’s vice president, Alexander Long, the town quickly grew as a transportation hub for agricultural products from the surrounding region. Longmont played a significant role in the development of the Colorado Front Range, serving as a major shipping point for cattle, wheat, and other commodities. The town’s historic downtown, with its Victorian architecture and well-preserved buildings, offers a glimpse into Longmont’s past.

Modern Development

In recent decades, Longmont has experienced rapid growth and transformation. The city’s economy has diversified to include high-tech industries, manufacturing, and healthcare. Longmont is home to several major employers, such as IBM, Google, and Lockheed Martin. The city has also become a destination for families and young professionals, attracted by its vibrant arts and culture scene, excellent schools, and abundant outdoor recreation opportunities. Longmont continues to be a thriving and dynamic community, balancing its historical legacy with modern development.