Rainfall totals Riverside, CA
Through Oct 7, 2026, Riverside has received 3.93 inches of rain for the year, according to the official daily climate report. The normal year-to-date total is 7.00 inches. The normal figure is what the city would typically have seen by this point in the calendar. This reading comes from the station gauge at RIVERSIDE MUNICIPAL in the National Weather Service's daily climate report.
as of
Data from Riverside Municipal Airport, with records back to 1998. Across the record from 1998, 95 percent of days have a reading, with 100 percent in 2025.
Most recent rainfall
0.01 inches of rain fell on Sep 7, 2026, the latest measurable rainfall this year.
RIVERSIDE MUNICIPAL saw no measurable rain on Oct 7, 2026, according to the National Weather Service daily climate report.
The last measurable rain in Riverside fell on Sep 7, 2026, 31 days ago. In October, rain days at this station are typically 4.5 days apart.
Official rainfall report for Oct 7, 2026
| Measured | Normal | vs normal | |
|---|---|---|---|
| Rain on Oct 7, 2026 | 0.00 inches | 0.01 inches | -0.01 inches |
| Last 48 hours | 0.00 inches | ||
| Last 72 hours | 0.00 inches | ||
| Last 7 days | 0.00 inches | ||
| Month to date | 0.00 inches | 0.04 inches | -0.04 inches |
| Year to date | 3.93 inches | 7.00 inches | -3.07 inches (-44%) |
| Record for Oct 7 | 0.30 inches | 1923 |
Source: National Weather Service daily climate report for RIVERSIDE MUNICIPAL, issued the morning after Oct 7, 2026. The local National Weather Service office issues the daily climate report for the airport station the next morning, and that report is the official figure.
How much rain did Riverside get?
Days with measurable rain, 2026
| Date | Rainfall |
|---|---|
| Sep 7, 2026 | 0.01 inches |
| Sep 6, 2026 | 0.35 inches |
| May 5, 2026 | 0.10 inches |
| May 3, 2026 | 0.01 inches |
| Apr 27, 2026 | 0.01 inches |
| Apr 26, 2026 | 0.30 inches |
| Apr 25, 2026 | 0.01 inches |
| Apr 13, 2026 | 0.02 inches |
| Apr 12, 2026 | 0.21 inches |
| Apr 1, 2026 | 0.06 inches |
| Mar 31, 2026 | 0.08 inches |
| Feb 19, 2026 | 0.25 inches |
| Feb 18, 2026 | 0.20 inches |
| Feb 17, 2026 | 0.27 inches |
| Feb 16, 2026 | 0.76 inches |
| Feb 11, 2026 | 0.54 inches |
| Jan 22, 2026 | 0.01 inches |
| Jan 5, 2026 | 0.02 inches |
| Jan 4, 2026 | 0.04 inches |
| Jan 3, 2026 | 0.26 inches |
| Jan 2, 2026 | 0.06 inches |
| Jan 1, 2026 | 0.36 inches |
With 0.76 inches on Feb 16, 2026, this is the 66th wettest of the 943 measurable rain days in the Riverside Municipal Airport record, which begins in 1998. That is the most rain recorded at this station on February 16 since 1998.
Through Oct 3, 2026, the GHCN-Daily station record shows 3.93 inches of measurable rain so far this year, falling over a 22-day span. Station observations are from GHCN-Daily, with a 1-3 day lag and quality checks by NOAA.
Riverside rainfall by month, 2026
| Month | Rainfall | Normal | vs normal |
|---|---|---|---|
| January | 0.75 inches | 2.29 inches | -1.54 inches (-67%) |
| February | 2.02 inches | 2.41 inches | -0.39 inches (-16%) |
| March | 0.08 inches | 1.21 inches | -1.13 inches (-93%) |
| April | 0.61 inches | 0.59 inches | +0.02 inches (+3%) |
| May | 0.11 inches | 0.20 inches | -0.09 inches |
| June | 0.00 inches | 0.01 inches | -0.01 inches |
| July | 0.00 inches | 0.12 inches | -0.12 inches |
| August | 0.00 inches | 0.02 inches | -0.02 inches |
| September | 0.36 inches | 0.11 inches | +0.25 inches |
| October | 0.00 inches | 0.33 inches |
October is still in progress; figures run through Oct 3, 2026. Averages are 1991-2020 normals from NCEI.
Rainfall days at each threshold in Riverside
| Year | 0.5+ in. | 1+ in. | 2+ in. | 3+ in. |
|---|---|---|---|---|
| 2025 | 6 | 2 | 0 | 0 |
| 2024 | 7 | 3 | 1 | 0 |
| 2023 | 8 | 4 | 0 | 0 |
| 2022 | 2 | 0 | 0 | 0 |
| 2021 | 5 | 2 | 0 | 0 |
| 2020 | 5 | 2 | 0 | 0 |
| 2019 | 9 | 3 | 1 | 0 |
| 2018 | 6 | 1 | 0 | 0 |
| 2017 | 6 | 3 | 0 | 0 |
| 2016 | 6 | 0 | 0 | 0 |
| Average | 5.1 | 1.6 | 0.2 | 0.0 |
A day counts when its rainfall total meets or passes the column amount, from Riverside Municipal Airport records in GHCN-Daily. Every complete year starting with 1998 counts toward the average, 25 years in total.
Past rainfall years in Riverside
All-time rainfall records
| Wettest day | 2.68 inches | Feb 14, 2019 |
|---|---|---|
| Wettest year | 16.40 inches | 2010 |
| Driest year | 3.40 inches | 2013 |
| Average year | 8.37 inches | 25 complete years on record |
| Rain days a year | 35 | average, 0.01 inch or more |
| Record begins | 1998 | 9,926 daily readings |
Monthly rainfall normals
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inches | 2.29 | 2.41 | 1.21 | 0.59 | 0.20 | 0.01 | 0.12 | 0.02 | 0.11 | 0.33 | 0.57 | 1.51 | 9.37 |
Averages are 1991-2020 normals from NCEI.
The daily climate report is issued by the local National Weather Service forecast office and delivered to this page by the Iowa Environmental Mesonet of Iowa State University. Under 17 U.S.C. 105, no copyright attaches to the government-produced figures on this page, including reports, alerts, station observations, and normals, which were created by the National Weather Service and other NOAA offices. The notice that 17 U.S.C. 403 requires appears in this sentence. It does not imply endorsement by or affiliation with those agencies. See: Data sources and attribution.