Rancho Cucamonga, California Weather Forecast
Today in Rancho Cucamonga: clear skies with a high near 74°F and a low around 55°F. Rain chance 1%. No day tops a 20% rain chance through Friday. Highs run 67 to 78°F through Friday.
Forecast updated 1:05 AM PDT, Oct 23
Active Weather Alerts
7-Day Forecast for Rancho Cucamonga
Today 10/24
74°55°
Sun 10/25
76°58°
Mon 10/26
78°60°
Tue 10/27
77°59°
Wed 10/28
74°58°
Thu 10/29
70°58°
Fri 10/30
67°57°
Next 24 Hours
| Now | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | 9 PM | 10 PM | 11 PM | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sky |  | | | | | | | | | | | | | | | | | | | | | | | |
| Temp | 58° | 57° | 56° | 56° | 56° | 56° | 56° | 55° | 58° | 62° | 65° | 69° | 71° | 73° | 74° | 74° | 74° | 74° | 71° | 68° | 65° | 64° | 62° | 61° |
| Rain | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 1% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% |
| Wind | W 7 | W 7 | W 6 | WNW 5 | NW 5 | WNW 5 | WNW 7 | WNW 7 | WNW 7 | W 6 | W 5 | W 4 | W 4 | W 4 | W 3 | W 2 | W 1 | W 0 | W 0 | WNW 1 | NW 3 | NNW 4 | NNW 5 | N 5 |
Growing Conditions
Growing degree days
4,675
since Apr 1, base 50°F
Rain, last 30 days
2.74 in
model analysis
Rain, year to date
16.67 in
since Jan 1
2-inch soil temperature
67°F
yesterday, daily average
Reference ET, last 7 days
1.47 in
FAO-56 grass reference
Through Oct 22. Season totals use model analysis for this point and update every morning.
Soil, ET and spray tools for Rancho Cucamonga →
Current Stats & Observations
NWS Forecast
About Rancho Cucamonga Weather
Rancho Cucamonga sits at about 1,362 feet above sea level in San Bernardino County, California. About 177,603 people live in the Rancho Cucamonga area. Official forecasts and warnings for the area come from the National Weather Service SGX office, and the nearest NEXRAD radar site is KSOX. The city is in USDA plant hardiness zone 10a, where the coldest winter night typically falls between 30 to 35°F. Freezing temperatures are rare here.
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