Rain forecast and rainfall this year
Rancho Cucamonga, CA
No rain expected today.
Updated Friday 8:40 PM ET.
Forecast
0 percent chance of rain
TodayHigh 80°, low 59°No rain expected
0 percent chance of rain
TomorrowHigh 83°, 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 rank309th of 363
In California34th 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
- FontanaCA8.09 in this year6 miles
- OntarioCA8.09 in this year6 miles
- PomonaCA8.81 in this year12 miles
- San BernardinoCA6.11 in this year15 miles
- RiversideCA6.11 in this year16 miles
More Rancho Cucamonga 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.