Rain forecast and rainfall this year
Ontario, CA
No rain expected today.
Updated Friday 8:40 PM ET.
Forecast
0 percent chance of rain
TodayHigh 84°, low 60°No rain expected
0 percent chance of rain
TomorrowHigh 86°, low 59°No rain expected
This year so far, since Jan 1
8.09 in
−1.02 in below normal for this point in the year (9.11 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
Records since 1999
Wettest year21.90 in, 2023
Biggest rain day3.62 in, Feb 5, 2024
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. Records are this station’s own and may differ from official NWS city records, which can include earlier locations. Incomplete years and several-day totals are left out. Rain Scoreboard is not affiliated with the National Weather Service or NOAA.