For prior seasons, click here.
Visitors to a Castle Green Open House in Pasadena on a rainy day. Los Angeles Almanac Photo.
Why our “Rainfall Season” is different than that of the National Weather Service
Also see:
-- Historic Pasadena Seasonal Rainfall
-- Current Season Rainfall-to-Date - Downtown Los Angeles
-- Current Season Rainfall-to-Date - Beverly Hills
-- Current Season Rainfall-to-Date - Burbank
-- Current Season Rainfall-to-Date - Claremont
-- Current Season Rainfall-to-Date - Hawthorne
-- Current Season Rainfall-to-Date - Lancaster
-- Current Season Rainfall-to-Date - Long Beach
-- Current Season Rainfall-to-Date - Los Angeles International Airport
-- Current Season Rainfall-to-Date - Palmdale
-- Current Season Rainfall-to-Date - Sandberg
-- Current Season Rainfall-to-Date - Santa Catalina Island
-- Current Season Rainfall-to-Date - Santa Clarita
-- Current Season Rainfall-to-Date - Santa Fe Dam (San Gabriel Valley)
-- Current Season Rainfall-to-Date - Santa Monica
-- Current Season Rainfall-to-Date - Torrance
-- Current Season Rainfall-to-Date - Van Nuys, Los Angeles
-- Current Season Rainfall-to-Date - Westwood, Los Angeles
-- Current Season Rainfall-to-Date - Whittier
-- Current Season Rainfall-to-Date - Woodland Hills, Los Angeles
NOTE: When most weather reporting sources cite weather in Los Angeles (without specifying where, exactly, in Los Angeles), these numbers are typically for the Downtown Los Angeles weather station.
How Much Water is One Inch of Rain?
Reporting for this station is not at consistent intervals and almost never on a daily basis. Reports for this station commonly come out in a single monthly batch, about six or more days after the end of the month. In some months (again, inconsistently), updates for Pasadena come through in batches, perhaps two or three times during the month. We update this page as soon as these updates come through. As an alternative, the nearest weather station with the closest similar micro-climate would be at Santa Fe Dam, about ten miles southeast of Downtown Pasadena, in the San Gabriel Valley. We post this station's daily and hourly reports.
Rainfall measured in inches
| Date (May) | Rainfall Measured for Day | Month's Cumulative Rainfall Measured |
|---|---|---|
| No rainfall data yet reported for this month by the National Weather Service. Reporting for this station is typically delayed. Last update was on Apr. 24. | ||
Monthly rainfall totals for previous seasons are found at Monthly Rainfall for Pasadena.
Rainfall measured in inches
NOTE: Rainfall normals were updated on May 4, 2021.†
| Month | Rainfall For Month | Rainfall For Season | ||||
|---|---|---|---|---|---|---|
| Measured for Month | Monthly Normal† | Deviation from Monthly Normal | Measured for Season-to-Date | Season Normal-to-Date† | Deviation from Season Normal-to-Date | |
| Jul 2024 | 0.00 | 0.06 | -0.06 | 0.00 | 0.06 | -0.06 |
| Aug 2024 | 0.00 | 0.03 | -0.03 | 0.00 | 0.09 | -0.09 |
| Sep 2024 | 0.00 | 0.22 | -0.22 | 0.00 | 0.31 | -0.31 |
| Oct 2024 | 0.00 | 0.84 | -0.84 | 0.00 | 1.15 | -1.15 |
| Nov 2024 | 0.06 | 1.10 | -1.04 | 0.06 | 2.25 | -2.19 |
| Dec 2024 | 0.00 | 3.33 | -3.33 | 0.06 | 5.58 | -5.52 |
| Month | Rainfall For Month | Rainfall For Season | ||||
| Measured for Month | Monthly Normal† | Deviation from Monthly Normal | Measured for Season-to-Date | Season Normal-to-Date† | Deviation from Season Normal-to-Date | |
| Jan 2025 | 0.55 | 4.51 | -3.96 | 0.61 | 10.09 | -9.48 |
| Feb 2025 | 5.30 | 5.16 | +0.14 | 5.91 | 15.25 | -9.34 |
| Mar 2025 | 2.64 | 3.03 | -0.39 | 8.55 | 18.28 | -9.73 |
| Apr 2025 | 0.00* | 1.11 | -1.11 | 8.55 | 19.39 | -10.84 |
| May 2025 | --- | 0.48 | --- | --- | 19.87 | --- |
| Jun 2025 | --- | 0.21 | --- | --- | 20.08 | --- |
† Normals, reissued every ten years, were updated on May 4, 2021. The latest normals are National Centers For Environmental Information data, used by the National Weather Service, based upon 30-year averages, covering 1991 through 2020. The total season normal for this station is 20.08 inches.
* Data for the month are not yet fully reported. Data for this station typically is delayed for up to several weeks. An update will be made upon the release of all data for the month.
Source: National Weather Service Forecast Office, Los Angeles/Oxnard
