Rancho Cucamonga picks up around 20 more inches of snow each winter.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Ontario | Metric | Rancho Cucamonga |
|---|---|---|
| 284 days | Sunny daysclear or partly cloudy skies | 285 days |
| 11 in | Precipitationper year | 12 in |
| 35 days | Wet daysrain or snow per year | 35 days |
| 0 in | Snowfallper year | 21 in |
| 93 days | Hot daysabove 90 °F | 91 days |
| 3 days | Freezing nightsat or below 32 °F | 3 days |
| 62% | Humidityaverage relative | 59% |
| 67 °F | Average temperatureyear round | 66 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ontario high | 68 | 68 | 72 | 76 | 80 | 87 | 94 | 95 | 91 | 83 | 75 | 67 |
| Rancho Cucamonga high | 68 | 68 | 72 | 76 | 80 | 86 | 93 | 95 | 91 | 83 | 75 | 67 |
| Ontario low | 44 | 46 | 48 | 51 | 55 | 60 | 64 | 65 | 63 | 56 | 48 | 43 |
| Rancho Cucamonga low | 44 | 45 | 48 | 51 | 55 | 59 | 64 | 64 | 63 | 56 | 48 | 43 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ontario | 2.4 | 2.8 | 1.7 | 0.8 | 0.4 | 0.1 | 0.1 | 0.0 | 0.1 | 0.6 | 0.8 | 1.7 |
| Rancho Cucamonga | 2.4 | 2.7 | 1.7 | 0.8 | 0.4 | 0.1 | 0.3 | 0.2 | 0.2 | 0.6 | 0.7 | 1.7 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ontario | 19 | 16 | 18 | 21 | 24 | 27 | 29 | 30 | 28 | 26 | 24 | 21 |
| Rancho Cucamonga | 19 | 16 | 19 | 22 | 24 | 28 | 29 | 30 | 29 | 27 | 23 | 21 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Ontario vs another city
- Ontario vs Chino, CA
- Ontario vs Eastvale, CA
- Ontario vs Montclair, CA
- Ontario vs Upland, CA
- Ontario vs Jurupa Valley, CA
- Ontario vs New York, NY
- Ontario vs Los Angeles, CA
- Ontario vs Chicago, IL
- Ontario vs Houston, TX
- Ontario vs Phoenix, AZ
- Ontario vs Philadelphia, PA
Rancho Cucamonga vs another city
- Rancho Cucamonga vs Upland, CA
- Rancho Cucamonga vs Fontana, CA
- Rancho Cucamonga vs Claremont, CA
- Rancho Cucamonga vs Montclair, CA
- Rancho Cucamonga vs Rialto, CA
- Rancho Cucamonga vs New York, NY
- Rancho Cucamonga vs Los Angeles, CA
- Rancho Cucamonga vs Chicago, IL
- Rancho Cucamonga vs Houston, TX
- Rancho Cucamonga vs Phoenix, AZ
- Rancho Cucamonga vs Philadelphia, PA
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).