Hot-summer Mediterranean climate
Climate Ontario - California
Annual high78ºF
Annual low53ºF
Precipitation15.04 inch
| Month | HighºF | LowºF | Precipinch |
|---|---|---|---|
| Jan | 65 | 44 | 3.31 |
| Feb | 66 | 45 | 3.39 |
| Mar | 70 | 47 | 2.32 |
| Apr | 74 | 51 | 0.94 |
| May | 79 | 56 | 0.30 |
| Jun | 85 | 59 | 0.12 |
| Jul | 92 | 63 | 0.09 |
| Aug | 94 | 65 | 0.13 |
| Sep | 89 | 63 | 0.27 |
| Oct | 81 | 55 | 0.64 |
| Nov | 73 | 47 | 1.21 |
| Dec | 66 | 43 | 2.32 |
- JanHigh 65ºFLow 44ºFPrecip 3.31 inch
- FebHigh 66ºFLow 45ºFPrecip 3.39 inch
- MarHigh 70ºFLow 47ºFPrecip 2.32 inch
- AprHigh 74ºFLow 51ºFPrecip 0.94 inch
- MayHigh 79ºFLow 56ºFPrecip 0.30 inch
- JunHigh 85ºFLow 59ºFPrecip 0.12 inch
- JulHigh 92ºFLow 63ºFPrecip 0.09 inch
- AugHigh 94ºFLow 65ºFPrecip 0.13 inch
- SepHigh 89ºFLow 63ºFPrecip 0.27 inch
- OctHigh 81ºFLow 55ºFPrecip 0.64 inch
- NovHigh 73ºFLow 47ºFPrecip 1.21 inch
- DecHigh 66ºFLow 43ºFPrecip 2.32 inch
Climate summary
What is the average weather in Ontario, California?
Ontario experiences a hot-summer climate with dry summers and wetter winters. Summers are hot, while winters are cool. The area receives low annual precipitation, with frequent rain or drizzle common during the cooler season, though summers are notably dry.
Ontario weather averages
Annual high78ºF
Annual low53ºF
Precipitation15.04 inch
Daily normals Ontario - California - January
| Day | HighºF | LowºF | Prec/ | Prec/ |
|---|---|---|---|---|
| Jan 1 | 66.9 | 43.8 | 0.09 | 0.09 |
| Jan 2 | 67.0 | 43.9 | 0.19 | 0.19 |
| Jan 3 | 67.1 | 43.9 | 0.28 | 0.28 |
| Jan 4 | 67.2 | 44.0 | 0.37 | 0.37 |
| Jan 5 | 67.3 | 44.1 | 0.46 | 0.46 |
| Jan 6 | 67.4 | 44.1 | 0.54 | 0.54 |
| Jan 7 | 67.5 | 44.2 | 0.63 | 0.63 |
| Jan 8 | 67.6 | 44.3 | 0.71 | 0.71 |
| Jan 9 | 67.6 | 44.3 | 0.80 | 0.80 |
| Jan 10 | 67.7 | 44.4 | 0.89 | 0.89 |
| Jan 11 | 67.8 | 44.5 | 0.97 | 0.97 |
| Jan 12 | 67.8 | 44.5 | 1.06 | 1.06 |
| Jan 13 | 67.9 | 44.6 | 1.15 | 1.15 |
| Jan 14 | 67.9 | 44.6 | 1.24 | 1.24 |
| Jan 15 | 67.9 | 44.6 | 1.32 | 1.32 |
| Jan 16 | 68.0 | 44.7 | 1.41 | 1.41 |
| Jan 17 | 68.0 | 44.7 | 1.49 | 1.49 |
| Jan 18 | 68.0 | 44.8 | 1.58 | 1.58 |
| Jan 19 | 68.0 | 44.8 | 1.66 | 1.66 |
| Jan 20 | 68.0 | 44.8 | 1.75 | 1.75 |
| Jan 21 | 68.0 | 44.9 | 1.83 | 1.83 |
| Jan 22 | 67.9 | 44.9 | 1.91 | 1.91 |
| Jan 23 | 67.9 | 44.9 | 1.99 | 1.99 |
| Jan 24 | 67.9 | 44.9 | 2.06 | 2.06 |
| Jan 25 | 67.9 | 45.0 | 2.13 | 2.13 |
| Jan 26 | 67.8 | 45.0 | 2.19 | 2.19 |
| Jan 27 | 67.8 | 45.0 | 2.25 | 2.25 |
| Jan 28 | 67.8 | 45.1 | 2.32 | 2.32 |
| Jan 29 | 67.7 | 45.1 | 2.40 | 2.40 |
| Jan 30 | 67.7 | 45.1 | 2.48 | 2.48 |
| Jan 31 | 67.7 | 45.2 | 2.57 | 2.57 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Ontario - November 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Nov 1 | 69.1 | 55.9 | 0.25 |
| Nov 2 | – | – | – |
| Nov 3 | – | – | – |
| Nov 4 | – | – | – |
| Nov 5 | – | – | – |
| Nov 6 | – | – | – |
| Nov 7 | – | – | – |
| Nov 8 | – | – | – |
| Nov 9 | – | – | – |
| Nov 10 | – | – | – |
| Nov 11 | – | – | – |
| Nov 12 | – | – | – |
| Nov 13 | – | – | – |
| Nov 14 | – | – | – |
| Nov 15 | – | – | – |
| Nov 16 | – | – | – |
| Nov 17 | – | – | – |
| Nov 18 | – | – | – |
| Nov 19 | – | – | – |
| Nov 20 | – | – | – |
| Nov 21 | – | – | – |
| Nov 22 | – | – | – |
| Nov 23 | – | – | – |
| Nov 24 | – | – | – |
| Nov 25 | – | – | – |
| Nov 26 | – | – | – |
| Nov 27 | – | – | – |
| Nov 28 | – | – | – |
| Nov 29 | – | – | – |
| Nov 30 | – | – | – |
The data for November 2026 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
- Highest max temperature69.1ºF · Nov 1
- Lowest max temperature69.1ºF · Nov 1
- Highest min temperature55.9ºF · Nov 1
- Lowest min temperature55.9ºF · Nov 1
Geo Ontario - California
Location
- Country
- United States
- State
- California
- County
- –
- City
- Ontario
- Zip Code
- 91798
- Elevation
- 1004 ft
- Longitude
- -117.65
- Latitude
- 34.06
- ICAO
- –
- IATA
- –