Climate averages 1991–2020
Rancho Cucamonga weather
in February.
A mild, wet month: the 10th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
February is a mild month in Rancho Cucamonga: daytime highs average 17.5°C and nights cool to about 6.1°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 111 mm of rain on roughly 7 days, which makes February a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 10 h 56 min on an average February day.
The nearest other city in this atlas is Ontario (7 km away). In February its highs average 17.8°C, about as warm as Rancho Cucamonga, with 102 mm of rain.
Among the 498 cities listed in the United States, Rancho Cucamonga ranks joint 111th of 498 for the warmest February highs and joint 443rd of 498 for the driest February (rainfall, lowest first). The mean February high of those 498 cities is 11.1°C; Rancho Cucamonga is 6.3°C warmer than that mean.
From February to March, average highs rise by 2.0°C to 19.5°C, and monthly rainfall falls from 111 mm to 68 mm.
The annual picture
February in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Rancho Cucamonga climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 17.2°C5.6°C | 5.6°C | 96 | 6.6 | 10.210 h |
| February, selected | 17.5°C6.1°C | 6.1°C | 111 | 7.4 | 10.911 h |
| March | 19.5°C7.7°C | 7.7°C | 68 | 6.8 | 12.012 h |
| April | 22.0°C9.4°C | 9.4°C | 32 | 4.6 | 13.013 h |
| May | 24.8°C12.2°C | 12.2°C | 15 | 2.6 | 13.914 h |
| June | 28.9°C15.3°C | 15.3°C | 3.4 | 0.5 | 14.414 h |
| July | 32.3°C18.7°C | 18.7°C | 2.2 | 0.5 | 14.214 h |
| August | 33.3°C19.2°C | 19.2°C | 1.1 | 0.3 | 13.413 h |
| September | 31.4°C17.4°C | 17.4°C | 5.5 | 1.2 | 12.412 h |
| October | 26.4°C13.2°C | 13.2°C | 22 | 3.1 | 11.411 h |
| November | 21.3°C8.8°C | 8.8°C | 30 | 3.5 | 10.410 h |
| December | 16.9°C5.4°C | 5.4°C | 67 | 5.8 | 9.910 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
February in nearby cities
- Ontario in FebruaryUnited States · 7 kmHigh 17.8°C · Low 6.7°C · 102 mm rain
- Chino in FebruaryUnited States · 14 kmHigh 17.7°C · Low 6.2°C · 102 mm rain
- Fontana in FebruaryUnited States · 15 kmHigh 17.1°C · Low 5.2°C · 111 mm rain
- Pomona in FebruaryUnited States · 16 kmHigh 17.9°C · Low 6.7°C · 102 mm rain
- Chino Hills in FebruaryUnited States · 20 kmHigh 17.4°C · Low 6.1°C · 102 mm rain
- Riverside in FebruaryUnited States · 25 kmHigh 17.8°C · Low 5.7°C · 111 mm rain
- Corona in FebruaryUnited States · 26 kmHigh 18.6°C · Low 6.6°C · 111 mm rain
- San Bernardino in FebruaryUnited States · 28 kmHigh 17.3°C · Low 5.4°C · 92 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Rancho Cucamonga) is explained once on the Rancho Cucamonga year overview and on the Sources, method and limits page.
Riverside, Fontana and Corona lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.