Rain forecast and rainfall this year
Ontario, CA
No rain expected today.
Updated Monday 4:17 PM ET.
Forecast
0 percent chance of rain
TodayHigh 86°, low 62°No rain expected
0 percent chance of rain
TomorrowHigh 86°, low 61°No rain expected
Today in Ontario
This year so far, since Jan 1
8.09 in
−1.10 in below normal for this point in the year (9.19 in).
National rank308th of 363
In California33rd of 68
Biggest day0.87 in, Oct 22
Last measurable rain0.25 in, Nov 1, 2026
Month by month
Jan1.02
Feb2.94
Mar0.25
Apr0.64
May0.21
Jun0.00
Jul0.00
Aug0.00
Sep0.56
Oct2.22
Nov0.25
Dec–
This yearNormal
Nearby cities
- Rancho CucamongaCA8.09 in this year6 miles
- PomonaCA8.81 in this year9 miles
- FontanaCA8.09 in this year9 miles
- CoronaCA6.47 in this year13 miles
- RiversideCA6.11 in this year14 miles
More Ontario weather
Forecast based on National Weather Service forecast data. Rainfall records are from NOAA Regional Climate Centers for the Ontario International Airport station, recorded since 1998; normals are NOAA’s 1991–2020 averages. Totals are preliminary. Weather Scoreboard is not affiliated with the National Weather Service or NOAA.