# Fullerton, California: A Month-by-Month Weather Guide
Fullerton, California, enjoys a classic Mediterranean climate, characterized by warm, dry summers and mild, wetter winters. Located in Orange County, it boasts sunshine for much of the year, making it a desirable destination for visitors and a pleasant place to live. But even in sunny California, the weather *does* change throughout the year. This guide provides a detailed look at Fullerton’s weather by month, helping you plan your visit or simply understand what to expect.
## **Overview of Fullerton's Climate**
Fullerton benefits from its proximity to the Pacific Ocean and the protective influence of the surrounding hills. This creates a microclimate that's generally warmer inland and cooler near the coast. Average temperatures range from the low 50s in winter to the high 80s in summer. Rainfall is concentrated during the winter months, with summers typically being very dry. The city experiences very little extreme weather, making it comfortable year-round.
## **Spring in Fullerton (March - May)**
Spring is a beautiful time to visit Fullerton. Wildflowers bloom, the hills turn green, and the temperatures are delightfully mild.
* **March:** Transition month. Average highs are in the low 70s, with lows around 50°F. Rainfall is still possible, but decreasing. Expect around 1.5 inches of rain.
* **April:** Warm and sunny. Highs climb to the mid-70s, and lows stay in the upper 50s. Rainfall is minimal, averaging around 0.7 inches.
* **May:** Pleasantly warm, often referred to as "May Gray" due to occasional morning coastal cloud cover. Highs reach the low 80s, with lows in the mid-60s. Rainfall is rare, typically less than 0.3 inches.
## **Summer in Fullerton (June - August)**
Summers in Fullerton are warm to hot and dry. The sun shines brightly, and outdoor activities are popular. While the ocean breeze can provide some relief, inland areas can experience significant heat.
* **June:** Warm and dry. Highs average around 83°F, with lows in the upper 60s. Virtually no rainfall.
* **July:** The hottest month of the year. Average highs are around 87°F, and lows are in the low 70s. Expect consistently sunny skies.
* **August:** Similar to July, with average highs around 86°F and lows in the upper 60s. The heat can be intense, but evenings are generally comfortable.
## **Autumn in Fullerton (September - November)**
Fall brings a welcome decrease in temperatures and the occasional return of rainfall. The Santa Ana winds can sometimes bring warmer, drier conditions in September and October.
* **September:** Warm days and cooler nights. Highs average around 82°F, with lows in the mid-60s. Rainfall is still unlikely.
* **October:** Pleasant and mild. Highs are in the low 70s, and lows drop to around 55°F. Rainfall begins to increase slightly, averaging around 0.8 inches.
* **November:** A transition month towards winter. Highs are in the upper 60s, and lows are in the low 50s. Rainfall becomes more frequent, averaging around 1.3 inches.
## **Winter in Fullerton (December - February)**
Winters in Fullerton are mild and wet compared to other parts of the country. While temperatures rarely drop below freezing, rainfall is common, and overcast days are more frequent.
* **December:** Mild and wet. Average highs are in the upper 60s, with lows around 48°F. Expect around 1.8 inches of rain.
* **January:** The coolest month of the year. Highs average around 66°F, and lows are around 47°F. This is typically the wettest month, with around 2.5 inches of rain.
* **February:** Similar to January, with average highs around 67°F and lows around 48°F. Rainfall begins to decrease, averaging around 2 inches.
## **Fullerton Weather by Month: A Quick Reference Table**
| Month | Avg High (°F) | Avg Low (°F) | Avg Rainfall (inches) |
|-----------|---------------|--------------|-----------------------|
| March | 72 | 50 | 1.5 |
| April | 75 | 58 | 0.7 |
| May | 80 | 64 | 0.3 |
| June | 83 | 68 | 0.1 |
| July | 87 | 71 | 0.0 |
| August | 86 | 68 | 0.1 |
| September | 82 | 65 | 0.2 |
| October | 73 | 55 | 0.8 |
| November | 68 | 50 | 1.3 |
| December | 67 | 48 | 1.8 |
| January | 66 | 47 | 2.5 |
| February | 67 | 48 | 2.0 |
## **Frequently Asked Questions (FAQ)**
**Q: What is the rainiest month in Fullerton?**
A: January is typically the rainiest month in Fullerton.
**Q: Does Fullerton get snow?**
A: No, snow is extremely rare in Fullerton.
**Q: What is the humidity like in Fullerton?**
A: Fullerton generally has low humidity, especially during the summer months.
**Q: What should I pack if I'm visiting Fullerton in the winter?**
A: Pack layers, including a light jacket or sweater, and an umbrella or raincoat.
**Q: Are the Santa Ana winds common in Fullerton?**
A: Yes, Santa Ana winds are common in the fall and can bring warmer, drier conditions.
## **Resources**
* **National Weather Service - Santa Ana:** [https://www.weather.gov/sgx/](https://www.weather.gov/sgx/)
* **AccuWeather - Fullerton, CA:** [https://www.accuweather.com/en/us/fullerton/92831/daily-weather-forecast/349385](https://www.accuweather.com/en/us/fullerton/92831/daily-weather-forecast/349385)
* **U.S. Climate Data - Fullerton, California:** [https://www.usclimatedata.com/climate/california/united-states/33.8833/-117.8333](https://www.usclimatedata.com/climate/california/united-states/33.8833/-117.8333)
* **City of Fullerton Official Website:** [https://www.cityoffullerton.com/](https://www.cityoffullerton.com/)
