February Weather in Fullerton, United States

Last updated: June 24, 2025

In February, the average temperature in Fullerton, United States hovers around -4°C (25°F). Temperatures can fluctuate significantly, with a minimum of -34°C (-28°F) and a maximum reaching 23°C (73°F). Expect about 20 mm (0.8 in) of precipitation over 6 days, coupled with a high average humidity of 81% that adds to the chill of the season.

February Temperature in Fullerton

In February in Fullerton, the average temperature is -4°C (25°F), with maximums reaching 23°C (73°F) and minimums plummeting to as low as -34°C (-28°F). It's important to pack appropriately for extreme fluctuations in temperature if you're planning to visit during this time.

February Weather in Fullerton: Daily Temperature Highs, Lows, and Averages

The chart illustrates February temperature patterns in Fullerton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fullerton, February typically has an average temperature of -4°C (25°F), with highs reaching up to 23°C (73°F) and lows dropping to around -34°C (-28°F).

Data source: Temperature data for Fullerton generated using information from the Copernicus Climate Change Service.

February Precipitation in Fullerton

In Fullerton in February, the precipitation amount is 20 mm (0.8 in) over the course of 6 days.

February Precipitation Trends in Fullerton

The chart displays monthly precipitation patterns in Fullerton, with values for each month alongside February’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how February’s conditions compare to those of other months. In Fullerton, February typically receives around 20 mm (0.8 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for February generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

February Humidity in Fullerton

In Fullerton in February humidity is 81%. With an average temperature of -4°C (25°F), this humidity feels like an icy blanket wrapping around you, making travel quite uncomfortable as each breath draws in a damp chill, often leaving you shivering and increasingly wary of the frosty air.

February Average Humidity in Fullerton

This chart illustrates the average monthly humidity levels in Fullerton, with February’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In February, average humidity in Fullerton is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for February generated using information from the Copernicus Climate Change Service.

February UV Index in Fullerton

In Fullerton in February, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Fullerton.

Maximum UV Index Levels in Fullerton for February

The chart shows the monthly maximum UV Index (UVI) for Fullerton in February, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In February, the maximum UV index in Fullerton typically reaches 5, which falls under the moderate exposure category.

Data source: Fullerton February UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How February Weather in Fullerton Compares to Other Months

Weather in Fullerton varies notably across the year, with each month offering distinct climate conditions. This page compares February’s weather to other months in Fullerton, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Fullerton, showing how February’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (26°F)	28 mm (1.1 inches)	73%	moderate
February Weather	-4°C (25°F)	20 mm (0.8 inches)	81%	moderate
March Weather	4°C (40°F)	89 mm (3.5 inches)	69%	high
April Weather	9°C (49°F)	57 mm (2.2 inches)	71%	very high
May Weather	16°C (61°F)	142 mm (5.6 inches)	80%	very high
June Weather	24°C (75°F)	97 mm (3.8 inches)	83%	extreme
July Weather	25°C (78°F)	65 mm (2.5 inches)	84%	very high
August Weather	23°C (74°F)	84 mm (3.3 inches)	84%	very high
September Weather	20°C (69°F)	57 mm (2.2 inches)	77%	very high
October Weather	11°C (52°F)	83 mm (3.3 inches)	72%	high
November Weather	4°C (40°F)	22 mm (0.9 inches)	80%	moderate
December Weather	-1°C (31°F)	42 mm (1.6 inches)	79%	moderate