Sebastopol Weather in May
Average highs run from 73°F on May 1 to 78°F on May 31, and lows from 44°F to 47°F. Normal precipitation for the month is 1.41 in over about 4 wet days.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 75°F
- Average low
- 46°F
- Precipitation
- 1.41 in
- Record high
- 102°FMay 15, 2008
- Record low
- 32°FMay 10, 2022
- Chance of a freeze
- 2%
- Days of 90°F or more
- 1.8
- Daylight
- 13 h 49 min to 14 h 39 min
- Cloud cover
- 41%
- Humidity
- 78%
- Dew point
- 49°F
- Wind
- 9.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 73°F | 44°F | 90°F 2013 | 38°F 2007 | 17% |
| May 2 | 73°F | 44°F | 92°F 2017 | 38°F 2019 | 17% |
| May 3 | 73°F | 44°F | 91°F 2013 | 37°F 2008 | 16% |
| May 4 | 73°F | 44°F | 89°F 2011 | 37°F 2020 | 16% |
| May 5 | 73°F | 44°F | 87°F 2011 | 38°F 2020 | 16% |
| May 6 | 73°F | 44°F | 90°F 2007 | 38°F 2010 | 15% |
| May 7 | 74°F | 44°F | 94°F 2001 | 38°F 2010 | 15% |
| May 8 | 74°F | 45°F | 93°F 2001 | 40°F 2010 | 15% |
| May 9 | 74°F | 45°F | 90°F 2025 | 33°F 2022 | 14% |
| May 10 | 74°F | 45°F | 92°F 2021 | 32°F 2022 | 14% |
| May 11 | 74°F | 45°F | 88°F 2012 | 33°F 2022 | 14% |
| May 12 | 74°F | 45°F | 87°F 2014 | 35°F 2022 | 14% |
| May 13 | 75°F | 45°F | 94°F 2014 | 40°F 2007 | 14% |
| May 14 | 75°F | 45°F | 95°F 2008 | 39°F 2017 | 13% |
| May 15 | 75°F | 46°F | 102°F 2008 | 36°F 1999 | 13% |
| May 16 | 75°F | 46°F | 97°F 2008 | 38°F 1999 | 13% |
| May 17 | 75°F | 46°F | 96°F 2009 | 40°F 2007 | 13% |
| May 18 | 75°F | 46°F | 95°F 2022 | 39°F 2002 | 13% |
| May 19 | 76°F | 46°F | 89°F 2026 | 40°F 1999 | 13% |
| May 20 | 76°F | 46°F | 91°F 2001 | 39°F 2009 | 12% |
| May 21 | 76°F | 46°F | 95°F 2000 | 42°F 2010 | 12% |
| May 22 | 76°F | 46°F | 95°F 2000 | 37°F 2010 | 12% |
| May 23 | 77°F | 46°F | 97°F 2000 | 40°F 2002 | 12% |
| May 24 | 77°F | 46°F | 100°F 2022 | 39°F 2013 | 11% |
| May 25 | 77°F | 47°F | 96°F 2014 | 41°F 2008 | 11% |
| May 26 | 77°F | 47°F | 97°F 2020 | 43°F 2012 | 11% |
| May 27 | 77°F | 47°F | 95°F 2020 | 39°F 2021 | 11% |
| May 28 | 78°F | 47°F | 93°F 2003 | 37°F 2010 | 10% |
| May 29 | 78°F | 47°F | 90°F 2025 | 40°F 2006 | 10% |
| May 30 | 78°F | 47°F | 100°F 2001 | 42°F 2013 | 10% |
| May 31 | 78°F | 47°F | 100°F 2001 | 45°F 2003 | 10% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- May 1
- sunrise 6:14 AM, sunset 8:03 PM
- May 31
- sunrise 5:50 AM, sunset 8:29 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00043578 (Graton), public domain. Records: NOAA GHCN-Daily, station USW00023213, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.