Modesto Climate & Monthly Temperature Overview – United States

Summer

Summer in Modesto, California, is characterized by hot and dry conditions. The average high temperature in July and August, the warmest months of the year, is around 95°F (35°C). The average low temperature in July and August is around 60°F (16°C). Modesto receives very little precipitation during the summer months, with an average of only 0.06 inches (1.5 mm) of rain in July and August combined.

Winter

Winter in Modesto is mild and wet. The average high temperature in January, the coldest month of the year, is around 55°F (13°C). The average low temperature in January is around 35°F (2°C). Modesto receives an average of 4.25 inches (108 mm) of rain in January, which is the wettest month of the year.

Average Monthly Temperatures

Modesto, California experiences warm to hot summers and mild to cool winters. The average monthly temperature ranges from 44.4°F (6.9°C) in January to 82.4°F (28°C) in July. The warmest months are June, July, and August, with average temperatures consistently above 77°F (25°C). The coldest months are December, January, and February, with average temperatures below 50°F (10°C).

Seasonal Temperature Variation

The temperature in Modesto varies considerably across the year. The warmest period lasts for about 3.4 months from June 12th to September 22nd, with average temperatures above 77°F (25°C). The hottest day of the year is July 26th, with an average high of 97°F (36.1°C) and a low of 65°F (18.3°C). The coldest period lasts for about 3.5 months from November 25th to March 7th, with average temperatures below 50°F (10°C). The coldest day of the year is January 10th, with an average low of 34°F (1.1°C) and a high of 52°F (11.1°C).

Cloud Cover in Modesto, United States

Modesto, located in the Central Valley of California, experiences a Mediterranean climate with hot, dry summers and mild, wet winters. This climate pattern influences cloud cover in the region, resulting in a distinct seasonal variation. During the summer months (June to September), Modesto experiences minimal cloud cover, with the skies often clear and sunny. The average monthly cloud cover during this period ranges from 10% to 20%. This low cloudiness favors outdoor activities and provides ample sunshine for solar energy production.

In contrast, winter months (December to February) bring an increase in cloud cover to Modesto. The average monthly cloud cover during this period ranges from 50% to 70%, as moisture-laden air masses from the Pacific Ocean move inland. These clouds often lead to overcast skies and occasional precipitation, including rain and fog. The increased cloudiness during winter can reduce solar energy production and result in lower temperatures, creating a more somber and humid environment.

Annual Precipitation in Modesto

Modesto, located in the Central Valley of California, experiences a Mediterranean climate characterized by hot, dry summers and mild, wet winters. Annual precipitation in Modesto averages around 22 inches, with most of the rainfall occurring between November and April. The wet season is influenced by the influence of the North Pacific storm track, which brings moisture-laden storms from the ocean to the Central Valley. These storms typically bring widespread rainfall, occasionally accompanied by thunderstorms.

Seasonal Variability and Extremes

Precipitation in Modesto exhibits significant seasonal variability. The summer months (June-August) are generally dry, with minimal to no rainfall. The majority of the annual precipitation occurs from December to February. January, on average, is the wettest month, receiving about 3.5 inches of rain. Occasionally, the region may experience extreme rainfall events, such as atmospheric rivers, which can bring heavy downpours and flooding. These events are often associated with prolonged periods of high atmospheric pressure over the Pacific Ocean, resulting in a narrow corridor of concentrated moisture that can unleash significant amounts of rain.

Rainfall Patterns

Modesto, located in the Central Valley of California, experiences a Mediterranean climate characterized by hot, dry summers and mild, wet winters. Rainfall is primarily concentrated during the winter months, particularly from November to April. During these months, the region is influenced by Pacific storms that bring moisture from the ocean. The average annual rainfall in Modesto is around 14 inches (36 centimeters), which is relatively low compared to other parts of the United States.

Seasonal Variations

Rainfall in Modesto exhibits clear seasonal variations. The wettest months are typically December and January, when the average rainfall exceeds 2 inches (5 centimeters) per month. In contrast, the driest months are July and August, with almost no rainfall. During the spring and fall, rainfall gradually increases or decreases, transitioning between the wet and dry seasons. The pattern of seasonal rainfall is crucial for the region’s agriculture, as it provides moisture necessary for crop growth during the growing season.

Historical Snowfall in Modesto

Modesto, a city located in Central California’s San Joaquin Valley, has a generally mild climate with warm, dry summers and cool, wet winters. However, snowfall is a rare occurrence in the region. On average, Modesto receives less than 0.1 inches of snowfall annually, making it one of the least snowy cities in the United States. The lack of significant snowfall is primarily due to the city’s location in the rain shadow of the Sierra Nevada Mountains, which block moisture from the Pacific Ocean from reaching the valley.

Recent Snowfall Events

In recent years, Modesto has experienced a few noteworthy snowfall events. In February 2011, the city received 3.2 inches of snow, the heaviest snowfall recorded in over 40 years. The snow caused widespread power outages and school closures, and it took several days for the city to fully recover. In December 2015, Modesto received another significant snowfall event, with 1.5 inches accumulating in the city. While not as severe as the 2011 storm, the 2015 snowfall still caused some disruptions to daily life. These snowfall events, though infrequent, demonstrate that Modesto is not immune to the occasional winter storm.

Climate and Environment

Modesto’s Mediterranean climate features hot, dry summers and mild, rainy winters. During the summer months, temperatures can soar into the triple digits, and humidity levels are typically low. Winters are generally cool and wet, with temperatures rarely dropping below freezing. Modesto receives an average of 15 inches of precipitation per year, mostly falling during the winter months. Despite its proximity to the Sierra Nevada Mountains, Modesto experiences relatively little snowfall due to the rainshadow effect.

Air Quality

Modesto’s air quality is generally good, but it can be affected by wildfire smoke and agricultural activities. During wildfire season, which typically occurs from June to October, smoke from distant fires can drift into the area, causing air quality to deteriorate. Agricultural activities, such as crop dusting and harvesting, can also contribute to air pollution. However, Modesto’s air quality is generally better than that of many other cities in California. According to the American Lung Association, Modesto has a “moderate” air quality, with an average Air Quality Index (AQI) of 69.

Moonrise and Moonset Times

In Modesto, United States, the time of moonrise and moonset varies throughout the month. Moonrise refers to the time when the Moon first becomes visible above the horizon, while moonset marks the time when it sinks below the horizon. The specific times depend on factors such as the Moon’s phase, the date, and the observer’s location within Modesto. To determine the exact moonrise and moonset times for a particular day, it is recommended to refer to reputable sources like time and date websites or astronomical almanacs.

Moon Phase Visibility

The Moon goes through different phases during its orbit around the Earth, ranging from New Moon to Full Moon. The Moon’s phase determines its visibility and appearance. During the New Moon phase, the Moon is not visible as it lies between the Earth and the Sun. As the Moon progresses through its phases, it becomes progressively more visible. The Waxing Crescent phase shows a small sliver of the Moon, while the First Quarter phase reveals half of the Moon. The Full Moon phase displays the entire Moon, and the Waning Crescent phase shows a decreasing crescent as the Moon approaches its New Moon phase again. Understanding the Moon’s phases helps in predicting its visibility and observing its changing appearance.

Humidity Trends and Patterns

Modesto, located in California’s Central Valley, experiences a Mediterranean climate characterized by hot, dry summers and mild, wet winters. The city’s relative humidity (RH) generally follows a diurnal pattern, being lowest during the afternoon due to higher temperatures and rising to its maximum at night and in the early morning hours when temperatures cool and condensation occurs.

During the summer months (June to September), Modesto experiences low humidity levels, with average RH values ranging from 40% to 60%. The low humidity, combined with high temperatures, can lead to dry conditions that increase the risk of wildfires and skin irritation. In contrast, winter (December to February) brings higher humidity levels, with RH values typically between 60% and 80%. These elevated humidity levels are associated with cooler temperatures, fog, and increased precipitation.

Seasonal Variations and Extreme Values

Seasonal variations in humidity are significant in Modesto. The most humid months are typically December and January, when RH values can reach or exceed 80%. Conversely, the driest months are usually July and August, with RH values often dropping below 40%. These seasonal changes are closely linked to the prevailing weather patterns. During the winter, moist Pacific air masses dominate, resulting in higher humidity and precipitation. In the summer, hot and dry air from the interior of California dominates, leading to low humidity and high temperatures.

It’s important to note that extreme humidity values can occasionally occur outside the typical seasonal ranges. During prolonged heat waves, humidity levels may remain low even at night, increasing discomfort and health risks. Conversely, during winter storms, humidity levels can surge to 90% or more, creating a moist and uncomfortable environment.

Wind Speed and Direction

Modesto, located in California’s Central Valley, experiences a Mediterranean climate characterized by hot, dry summers and mild, wet winters. The wind patterns in Modesto are primarily influenced by the region’s topography and the seasonal pressure gradients. During the summer months, a strong high-pressure system over the Pacific Ocean creates offshore winds that blow from the west towards the interior of California. These prevailing westerly winds typically range from 10 to 15 miles per hour (mph). During the winter months, the pressure gradient reverses, leading to onshore winds from the east or southeast. These winds are generally weaker and more variable, with speeds typically ranging between 5 and 10 mph.

Gusts and Extreme Events

While Modesto’s average wind speeds are moderate, occasional strong gusts can occur. These gusts are often associated with passing weather systems, such as thunderstorms or cold fronts. During these events, wind speeds can exceed 20 mph, sometimes reaching 30-40 mph. Additionally, Modesto is located in an area prone to occasional strong winds from a phenomenon known as the “Diablo Wind.” These winds originate in the mountains east of the city and can gust up to 60 mph or more, causing significant damage to trees, power lines, and structures.

Spring (March-May):

Spring in Modesto offers a delightful balance of mild temperatures and blooming landscapes. The average daily temperature ranges between 55°F and 75°F, making it ideal for outdoor activities. The city comes alive with vibrant flowers, including almond blossoms, poppies, and plum trees, creating a picturesque backdrop for exploration. Spring is an excellent time to visit for hiking, biking, or simply enjoying picnics in the numerous parks and gardens.

Fall (September-October):

Fall in Modesto brings a transition to cooler temperatures, with daily averages ranging from 50°F to 70°F. The vibrant autumn foliage transforms the surrounding countryside into a stunning tapestry of colors. Fall is a popular time for wine tasting in the nearby Lodi appellation, where numerous vineyards offer tours and tastings showcasing their acclaimed wines. Other fall activities include attending the Modesto Art Walk, exploring local museums, or simply enjoying the crisp autumn air while strolling through the historic downtown area.

Solar Potential and Benefits:

Modesto, California possesses remarkable solar energy potential due to its abundant sunshine throughout the year. The city receives an average of 280 sunny days annually, with a solar insolation index of approximately 5.5 kWh/m²/day. This favorable solar climate makes Modesto an ideal location for harnessing solar energy. By embracing solar technology, residents and businesses can significantly reduce their energy consumption and environmental impact. Solar photovoltaic (PV) systems convert sunlight directly into electricity, providing a clean and renewable source of power.

Solar Installations and Incentives:

Modesto has been actively promoting solar energy adoption. The city offers various incentives, such as rebates and tax breaks, to encourage property owners to install solar PV systems. Several large-scale solar projects have been completed in the area, including the 70-megawatt Riverbank Solar Farm. Additionally, local utility companies provide net metering programs, allowing solar customers to sell excess energy back to the grid. As a result, Modesto has emerged as a leader in solar energy adoption in California. Numerous homes, businesses, and public buildings across the city have installed solar panels, contributing to its sustainability goals and reducing its carbon footprint.

General Topography

Modesto, California lies within the San Joaquin Valley, a broad and relatively flat alluvial plain. The city itself is situated at an elevation of approximately 100 feet (30 meters) above sea level. The surrounding landscape is characterized by gently rolling hills and agricultural fields. To the east, the Sierra Nevada Mountains rise dramatically, forming a scenic backdrop for the city.

Notable Topographic Features

One notable topographic feature in the Modesto area is the Tuolumne River. The river flows through the city and has carved a deep canyon into the surrounding hills. The canyon provides a scenic spot for recreation and offers opportunities for hiking, biking, and fishing. Another notable feature is the Dry Creek Regional Park. The park encompasses over 1,000 acres of rolling grasslands and oak woodlands. It includes several miles of hiking trails that offer panoramic views of the surrounding countryside.

Modesto City-County Airport (MOD)

Modesto City-County Airport (MOD) is the closest airport to the city of Modesto, California. It is located approximately 3 miles northwest of downtown Modesto and offers a variety of commercial and private flights. The airport serves as a hub for Allegiant Air, with nonstop flights to several destinations in the western United States. MOD also offers charter and cargo services, as well as flight training and aircraft maintenance.

Other Nearby Airports

In addition to MOD, there are several other airports within easy driving distance of Modesto. Stockton Metropolitan Airport (SCK) is located approximately 25 miles north of Modesto and is serviced by United Airlines and Southwest Airlines. Sacramento International Airport (SMF) is about 45 miles northeast of Modesto and offers a wide range of domestic and international flights. For private or charter flights, Turlock Municipal Airport (TKA) is located approximately 15 miles southeast of Modesto.

Modesto is a vibrant city in California’s Central Valley, with a population of over 215,000. Modesto is known for its rich history and agricultural heritage, being a major producer of almonds, grapes, and walnuts. The city is also home to a diverse community, with a significant Hispanic population and a growing number of Asian American residents. Visitors to Modesto can enjoy a variety of attractions, including the historic Gallo Center for the Arts, the McHenry Mansion, and the Great Valley Museum. The city also offers a wide range of outdoor recreation opportunities, such as hiking, biking, and fishing in the nearby Stanislaus River.

Modesto has a long and fascinating history, dating back to the Native American tribes who originally inhabited the area. In the early 1800s, Spanish missionaries established a mission near present-day Modesto. The city was officially founded in 1870 and named after Modesto Brizzolara, a local farmer. Modesto played a significant role in the development of California’s agricultural industry and was once known as the “Watermelon Capital of the World.” Today, Modesto is a thriving city with a strong economy and a diverse population. It is a great place to live, work, and raise a family.