Spring
76°F / 52°F
March, April, May: about 2.7 in of rain.
Plan a visit
Best time to visit Rancho Cucamonga
April, May, October bring mild highs and the least rain.
Best time to visit
April · May · October
Highs between 65°F and 85°F with the least rain of the year. Hottest: August (95°F). Coldest nights: December (44°F). Wettest: February.
Rancho Cucamonga by season
Month-by-month planner
| Month | Weather | High / low | Rain | Local guides |
|---|---|---|---|---|
| January | Great | 68°F / 45°F | 2.6 in | |
| February | Wet | 68°F / 46°F | 3.1 in | Valentine’s Day |
| March | Great | 72°F / 49°F | 1.6 in | St. Patrick’s Day |
| April | Great | 76°F / 51°F | 0.80 in | |
| May | Great | 80°F / 56°F | 0.30 in | |
| June | Good | 86°F / 60°F | 0.00 in | Fourth of July |
| July | Hot | 94°F / 65°F | 0.10 in | Fourth of July |
| August | Hot | 95°F / 65°F | 0.00 in | |
| September | Hot | 91°F / 64°F | 0.10 in | Halloween |
| October | Great | 83°F / 57°F | 0.40 in | Halloween |
| November | Great | 75°F / 49°F | 0.80 in | Halloween, Thanksgiving, Christmas |
| December | Great | 67°F / 44°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 Ontario Intl Ap station, not a forecast.
Around Rancho Cucamonga
See Rancho Cucamonga before you go
A DRIVE AROUND TOWN
A recorded drive through Rancho Cucamonga
A recorded drive through Rancho Cucamonga offers a street-level introduction to the city. This film is a dated journey, not live road conditions.
Watch on YouTube ↗
THINGS TO DO · YOUTUBE SHORT
My vlog: Discovering a beautiful mountain road in Rancho Cucamonga😄👍
An activity Short shared by XiaomeiCheckIn.
Watch on YouTube ↗Questions
What is the best month to visit Rancho Cucamonga?
April, May, October: highs between 65°F and 85°F with the least rain.
What is the hottest month in Rancho Cucamonga?
August, averaging 95°F highs.
What is the coldest month in Rancho Cucamonga?
December, with average lows of 44°F.
What is the rainiest month in Rancho Cucamonga?
February, averaging 3.1 in of precipitation.
When are the big holidays in Rancho Cucamonga?
See the local guides: Halloween (October), Thanksgiving (November), Christmas lights (late November to December), New Year’s Eve.