Spring
74°F / 54°F
March, April, May: about 2.6 in of rain.
Plan a visit
Best time to visit Fullerton
May, June, July bring mild highs and the least rain.
Best time to visit
May · June · July
Highs between 65°F and 85°F with the least rain of the year. Hottest: August (87°F). Coldest nights: December (46°F). Wettest: February.
Fullerton by season
Month-by-month planner
| Month | Weather | High / low | Rain | Local guides |
|---|---|---|---|---|
| January | Great | 69°F / 46°F | 2.9 in | |
| February | Wet | 69°F / 48°F | 3.0 in | Valentine’s Day |
| March | Great | 71°F / 52°F | 1.7 in | St. Patrick’s Day |
| April | Great | 74°F / 54°F | 0.60 in | |
| May | Great | 76°F / 58°F | 0.30 in | |
| June | Great | 79°F / 63°F | 0.10 in | Fourth of July |
| July | Great | 84°F / 66°F | 0.00 in | Fourth of July |
| August | Good | 87°F / 66°F | 0.00 in | |
| September | Good | 85°F / 65°F | 0.10 in | Halloween |
| October | Great | 80°F / 58°F | 0.50 in | Halloween |
| November | Great | 74°F / 51°F | 0.70 in | Halloween, Thanksgiving, Christmas |
| December | Great | 68°F / 46°F | 1.9 in | Christmas, New Year’s Eve |
“Great” means highs between 65°F and 85°F with fewer than 10 wet days. Averages are NOAA’s 1991–2020 normals for the Fullerton Muni Ap station, not a forecast.
Around Fullerton
See Fullerton before you go
THINGS TO DO · YOUTUBE SHORT
Fullerton Community Park
A local activity Short shared by Owen's Travels.
Watch on YouTube ↗
THINGS TO DO · YOUTUBE SHORT
having fun at the hiking trail fullerton california have a great day!
A local activity Short shared by Franz ScottLee.
Watch on YouTube ↗Questions
What is the best month to visit Fullerton?
May, June, July: highs between 65°F and 85°F with the least rain.
What is the hottest month in Fullerton?
August, averaging 87°F highs.
What is the coldest month in Fullerton?
December, with average lows of 46°F.
What is the rainiest month in Fullerton?
February, averaging 3.0 in of precipitation.
When are the big holidays in Fullerton?
See the local guides: Halloween (October), Thanksgiving (November), Christmas lights (late November to December), New Year’s Eve.