Fullerton Climate & Monthly Temperature Overview – United States

Spring (March – May)

Spring in Fullerton is characterized by gradual warming temperatures and increasing sunshine. Average high temperatures range from 65°F (18°C) in March to 75°F (24°C) in May, while lows average around 48°F (9°C) in March and rise to 55°F (13°C) in May. Although rainfall decreases compared to winter, sporadic showers are still possible, especially in March. Springtime is an ideal time to enjoy the outdoors as parks and gardens come to life with blooming flowers and lush greenery.

Summer (June – August)

Fullerton experiences warm and dry summers with little to no precipitation. Temperatures reach their peak in July, with an average high of 86°F (30°C) and an average low of 64°F (18°C). The humidity is generally low, making the heat bearable. Summer is the perfect time for outdoor activities such as swimming, hiking, and biking in the nearby mountains. Evenings are pleasant, with temperatures dropping into the mid-60s Fahrenheit (18°C). While nighttime fog can occasionally roll in from the coast, it typically dissipates by morning.

Average Temperatures by Season

Fullerton experiences mild temperatures year-round, with distinct seasonal variations. In the spring (March to May), temperatures gradually rise, reaching an average high of 75°F (24°C) by May. Summer (June to August) is typically warm and sunny, with average high temperatures in the mid-’80s Fahrenheit (°F) and lows in the ’60s °F. The hottest months are July and August, averaging highs of 88°F (31°C) and lows of 66°F (19°C), respectively.

Annual and Monthly Averages

Fullerton’s annual average temperature is a comfortable 62°F (17°C). The coldest months are December and January, with average lows dipping into the ’40s °F. In December, the average low is 43°F (6°C), while in January it’s 42°F (6°C). The warmest months are July and August, with average highs reaching 88°F (31°C). April, May, and June are also pleasant, with average highs in the ’70s °F and lows in the ’50s °F.

Clouds in Fullerton, California

Fullerton, California experiences a Mediterranean climate with warm, dry summers and mild, wet winters. The average annual temperature is 62.7°F (17.1°C), and the average annual rainfall is 14.9 inches (378 mm).

Clouds are an important part of the weather in Fullerton. They provide shade from the sun, which can help to keep the city cool in the summer. Clouds can also produce rain, which is important for watering the plants and trees in the city. The most common type of cloud in Fullerton is the stratocumulus cloud. These clouds are low, flat clouds that often appear in the morning or evening. Cirrus clouds are also common in Fullerton. These clouds are high, thin clouds that are made of ice crystals.

Precipitation Patterns:

Fullerton, California experiences distinct precipitation patterns throughout the year. During the wet season, which typically spans from November to April, the region receives the majority of its annual rainfall. Winter months, particularly January and February, witness the highest precipitation levels, with an average of 3-4 inches per month. The wet season brings intermittent periods of moderate to heavy rainfall, often accompanied by thunderstorms. Conversely, the dry season from May to October is characterized by minimal precipitation. During these months, rainfall is scarce, averaging less than 1 inch per month. However, occasional light showers or drizzle may occur during the dry season.

Seasonal Variability:

Precipitation in Fullerton exhibits significant seasonal variability. The wet season is influenced by the passage of Pacific storms, which bring moisture-laden air to the region. During this time, the area may experience heavy downpours and potential flooding. In contrast, the dry season is driven by the presence of the subtropical high-pressure system, which inhibits the formation of clouds and precipitation. As a result, the dry season often brings clear skies and warm temperatures. The transitional periods between the wet and dry seasons, known as the spring and fall, can be variable, with occasional rainfall or thunderstorms.

Annual Precipitation Patterns

Fullerton, California experiences a Mediterranean climate characterized by warm, dry summers and mild, wet winters. The average annual precipitation in Fullerton is approximately 15 inches (381 mm). The majority of the rainfall occurs during the winter months, with January and February being the wettest months. Precipitation is relatively scarce during the summer months, with July and August typically receiving less than 0.1 inches (2.5 mm) of rain.

Seasonal Variations in Precipitation

The seasonal distribution of precipitation in Fullerton is closely tied to the movement of the Pacific jet stream. During the winter months, the jet stream shifts southward, bringing storms and rain to Southern California. As the jet stream moves northward in the spring and summer, the weather in Fullerton becomes warmer and drier. In the fall, the jet stream gradually shifts back southward, bringing with it the return of precipitation. The variability of the Pacific jet stream from year to year can lead to significant fluctuations in annual precipitation totals.

Historical Snowfall in Fullerton

Snowfall in Fullerton, California, is a rare occurrence. The city is located in a Mediterranean climate zone, which is characterized by warm, dry summers and mild, rainy winters. Snowfall has been recorded in Fullerton only a handful of times in the past century. The most significant snowfall event occurred in January 1949, when 2 inches of snow fell in the city. Other notable snowfall events include 1 inch in December 1964, 0.5 inches in January 1974, and traces of snow in February 1989 and December 2008.

Impact of Snowfall

When snowfall does occur in Fullerton, it can have a significant impact on the city. The snow can cause roads to become impassable, leading to traffic delays and school closures. Businesses may also close or operate on reduced hours due to the hazardous conditions. Power outages can also occur if snow damages power lines. In addition to the practical challenges, snowfall in Fullerton can also be a beautiful sight, providing a unique and picturesque winter landscape.

Current Weather Conditions

As of this moment, the weather in Fullerton, United States, is characterized by a bright and sunny day. Temperatures are currently hovering around a comfortable 72°F (22°C), offering ideal conditions for outdoor activities and exploration. The humidity level stands at a moderate 45%, providing a refreshing and pleasant atmosphere. The wind is light and gentle, with a speed of approximately 5 mph (8 km/h). The skies are crystal clear, with no clouds obstructing the brilliant sunshine.

Forecast for the Coming Days

The favorable weather conditions are expected to continue throughout the week in Fullerton. Temperatures are predicted to remain within the 70-80°F (21-27°C) range, promising warm and enjoyable days ahead. Humidity levels will stay within a comfortable range, ensuring a pleasant and refreshing ambiance. The skies are expected to remain clear and sunny, with only a slight chance of isolated showers on Wednesday afternoon. Winds will continue to be light and variable, providing gentle breezes throughout the forecast period. Overall, the weather outlook for Fullerton in the coming days is positive, promising ideal conditions for outdoor activities, relaxation, and exploration.

Lunar Visibility in Fullerton

The visibility of the Moon in Fullerton, United States, varies significantly throughout the month due to its changing position in the sky. During a new moon, the Moon is not visible from Earth, as it is located directly between the Sun and Earth. As the Moon orbits Earth, it gradually becomes visible as a thin crescent, increasing in size and brightness over the following days.

At full moon, the Moon is completely illuminated and appears as a full circle in the sky. The time of full moon varies each month, but it typically occurs around the middle of the month. After full moon, the Moon gradually wanes, decreasing in size and brightness until it becomes a thin crescent again. The cycle of lunar phases repeats itself every 29.5 days, providing Fullerton residents with regular opportunities to observe the Moon in different stages.

Best Time to View the Moon in Fullerton

The best time to view the Moon in Fullerton is during clear nights when there is minimal light pollution. This is typically during the hours after sunset or before sunrise. Using binoculars or a telescope can enhance the viewing experience, allowing observers to see craters, mountains, and other features on the Moon’s surface. Popular locations for moon observation in Fullerton include parks, open fields, and rooftops with unobstructed views of the sky.

Annual Humidity Patterns in Fullerton, United States

Fullerton, California experiences moderate humidity levels throughout the year. The average relative humidity ranges from around 55% in February, the driest month, to approximately 65% in June, the most humid month. These values indicate that the air in Fullerton generally contains a moderate amount of moisture, making it comfortable for outdoor activities and reducing the risk of respiratory problems associated with dry air.

During the summer months, humidity levels tend to be slightly higher due to increased evaporation from the Pacific Ocean. However, the humidity is still relatively low compared to more humid regions in the United States. This makes Fullerton’s summers pleasant and enjoyable, with minimal discomfort from muggy conditions. In the winter months, humidity levels drop slightly as temperatures decrease, but the air remains relatively moist and comfortable, reducing the occurrence of dry skin or respiratory issues associated with low humidity.

Historical Wind Patterns

Fullerton, located in Southern California, has a Mediterranean climate characterized by warm, dry summers and mild, wet winters. The prevailing wind direction in Fullerton is from the west-northwest, bringing cool and moist air from the Pacific Ocean. During the summer months, the Santa Ana winds, a hot and dry wind originating from the inland deserts, occasionally blow through the area, causing temperatures to rise and humidity to drop significantly.

Recent Wind Data

Over the past decade, Fullerton has experienced an average wind speed of approximately 5-7 miles per hour. The windiest months are typically January and February, while the least windy months are July and August. In recent years, there have been several notable wind events in Fullerton, including a severe windstorm in 2019 that caused widespread power outages and damage to trees and buildings. Despite these occasional events, Fullerton generally experiences moderate and consistent winds throughout the year.

Spring (March-May):

Spring in Fullerton offers a captivating blend of warm temperatures and blooming nature. The average temperature ranges from 55°F to 75°F (13°C to 24°C), making it perfect for outdoor activities. Fullerton Arboretum, with its lush gardens, becomes a vibrant tapestry of colors as flowers come alive. The city’s annual Children’s Festival and Strawberry Festival, held in May, add to the cheerful atmosphere.

Fall (September-November):

As summer gives way to fall, Fullerton transforms into a picturesque canvas. Temperatures cool down slightly, ranging from 45°F to 70°F (7°C to 21°C). This is an excellent time for hiking or biking along the Fullerton Loop Trail, which offers breathtaking views of the city and its surroundings. Fall festivals, such as the Fullerton Pumpkin Festival, present festive opportunities to celebrate the season and gather with the community.

Residential Solar Potential

Fullerton, located in Southern California, boasts exceptional solar energy potential due to its abundant sunlight and favorable weather conditions. The city’s average annual sunshine hours exceed 2800, a significant advantage for residential solar installations. The residential sector is a major contributor to Fullerton’s overall energy consumption, making it an ideal candidate for solar energy adoption. With its rooftops and yards receiving ample sunlight, Fullerton has the capacity to generate significant solar electricity for residential use.

Community Solar Initiatives

In addition to residential solar adoption, Fullerton has embraced community solar initiatives to expand access to clean energy. Community solar programs allow multiple households or businesses to subscribe to and share the benefits of a single solar installation. These programs have become increasingly popular in Fullerton, providing a cost-effective alternative to individual residential systems. Additionally, several large-scale solar projects have been developed within or near the city, further contributing to the community’s solar energy portfolio. These efforts showcase Fullerton’s commitment to sustainability and the transition to a clean energy future.

Geologic History

Fullerton’s topography has been shaped by a series of geologic events that occurred over millions of years. The area was once covered by an ancient seafloor that was uplifted and folded during the formation of the San Gabriel Mountains. This uplift created a series of hills and valleys that run east-west through the city. The most prominent of these hills is Coyote Hills, which rises to a height of 1,270 feet above sea level.

Landforms

The topography of Fullerton is characterized by a mix of hills, valleys, and plains. The city’s northern and western regions are dominated by the Puente Hills, an extension of the San Gabriel Mountains. These hills are characterized by steep slopes and rugged terrain. The southern and eastern parts of the city are located on the La Habra Hills, which are less rugged than the Puente Hills. The central part of Fullerton is occupied by the Fullerton Valley, a broad, flat plain that was once part of the San Gabriel River floodplain.

John Wayne Airport

John Wayne Airport (SNA), officially known as John Wayne Orange County Airport, is the nearest airport to Fullerton. Located approximately 12 miles (19 km) southwest of the city, SNA is a mid-sized commercial airport with domestic and international flights. It serves as a major hub for Southwest Airlines and is also a focus city for Delta Air Lines and American Airlines. SNA offers a wide range of nonstop destinations, including major cities in the Western United States, as well as select international destinations in Mexico and Canada. The airport is easily accessible by car, taxi, ride-sharing services, and public transportation, including the Orange County Line bus system.

Long Beach Airport

Long Beach Airport (LGB), located approximately 15 miles (24 km) southwest of Fullerton, is another nearby airport option. LGB is a smaller commercial airport with primarily domestic flights. It is served by several major airlines, including Delta Air Lines, American Airlines, and JetBlue Airways. LGB offers a limited number of nonstop destinations compared to SNA, but it may be a more convenient option for some travelers based on location or flight availability. LGB is also accessible by car, taxi, ride-sharing services, and public transportation, including the Long Beach Transit bus system.

History and Culture

Fullerton, located in Orange County, California, has a rich history dating back to the 19th century. Originally named after George Fullerton, a railroad executive, the city was incorporated in 1904 and has since flourished into a vibrant and diverse community. Fullerton played a significant role in the development of the citrus industry in Orange County and was once known as the “Orange Capital of the World.” Today, the city boasts a historic downtown area, which features charming architecture and a wide range of shops, restaurants, and cultural attractions.

Education and Community

Fullerton is home to California State University, Fullerton, a renowned public university with a student body of over 39,000. The university contributes significantly to the city’s economy and cultural landscape, offering a variety of academic programs, athletic events, and cultural activities. Fullerton is also a family-friendly city with a strong sense of community. Residents enjoy access to numerous parks, recreational facilities, and community events throughout the year. The city is home to several farmers’ markets, offering fresh produce and local products. Fullerton is known for its exceptional quality of life, with a low crime rate, well-maintained neighborhoods, and a close-knit community spirit.