Climate in Ontario
The typical year in Ontario (California), from 1991-2020 normals. For what's happening now, see the current forecast ; a month ahead — the 30-day outlook .
Annual mean temp
19.2°C
average across 12 months
Annual precipitation
553 mm
yearly total
Warmest month
Aug
⌀ max 34°C
Coldest month
Feb
⌀ min 7°C
Temperatures by month typical high (orange) · typical low (blue)
Precipitation by month monthly totals across the year
The short version
Region California
Region California
Latitude 34.0633°N
Annual mean 19.2°C
Annual precipitation 553 mm
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Precip NEXRAD · NOAA Temp Wind Clouds Terrain
Source · 1991-2020 normals