San Luis Obispo Weather in April
Average highs run from 68°F on April 1 to 70°F on April 30, and lows from 47°F to 48°F. Normal precipitation for the month is 1.38 in over about 4 wet days.
April day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
April at a glance
- Average high
- 69°F
- Average low
- 47°F
- Precipitation
- 1.38 in
- Record high
- 101°FApr 20, 2009
- Record low
- 30°FApr 4, 1999
- Chance of a freeze
- 2%
- Days of 90°F or more
- 0.7
- Daylight
- 12 h 35 min to 13 h 36 min
- Cloud cover
- 37%
- Humidity
- 70%
- Dew point
- 44°F
- Wind
- 8.3 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 |
|---|---|---|---|---|---|
| Apr 1 | 68°F | 47°F | 86°F 2021 | 36°F 2008 | 19% |
| Apr 2 | 68°F | 47°F | 81°F 2000 | 32°F 1999 | 19% |
| Apr 3 | 68°F | 47°F | 83°F 2015 | 34°F 1999 | 19% |
| Apr 4 | 69°F | 47°F | 85°F 2026 | 30°F 1999 | 18% |
| Apr 5 | 69°F | 47°F | 89°F 2016 | 36°F 1999 | 18% |
| Apr 6 | 69°F | 47°F | 96°F 2022 | 38°F 2006 | 18% |
| Apr 7 | 69°F | 47°F | 91°F 2022 | 36°F 1999 | 17% |
| Apr 8 | 69°F | 47°F | 93°F 2022 | 32°F 2001 | 17% |
| Apr 9 | 69°F | 47°F | 91°F 2018 | 34°F 1999 | 17% |
| Apr 10 | 69°F | 47°F | 83°F 2024 | 37°F 1999 | 16% |
| Apr 11 | 69°F | 47°F | 82°F 2025 | 37°F 1999 | 16% |
| Apr 12 | 69°F | 47°F | 90°F 2008 | 34°F 1998 | 16% |
| Apr 13 | 69°F | 47°F | 95°F 2002 | 38°F 1998 | 15% |
| Apr 14 | 69°F | 47°F | 84°F 2002 | 38°F 2001 | 15% |
| Apr 15 | 69°F | 47°F | 83°F 1999 | 35°F 1998 | 15% |
| Apr 16 | 69°F | 47°F | 87°F 1999 | 37°F 2001 | 14% |
| Apr 17 | 69°F | 47°F | 88°F 2016 | 36°F 2013 | 14% |
| Apr 18 | 69°F | 47°F | 88°F 2016 | 37°F 2003 | 14% |
| Apr 19 | 70°F | 47°F | 96°F 2009 | 37°F 2005 | 13% |
| Apr 20 | 70°F | 47°F | 101°F 2009 | 38°F 2005 | 13% |
| Apr 21 | 70°F | 47°F | 97°F 2009 | 38°F 2005 | 13% |
| Apr 22 | 70°F | 47°F | 80°F 2017 | 36°F 2003 | 13% |
| Apr 23 | 70°F | 47°F | 83°F 2019 | 36°F 1999 | 12% |
| Apr 24 | 70°F | 47°F | 86°F 2020 | 39°F 2003 | 12% |
| Apr 25 | 70°F | 47°F | 86°F 2020 | 38°F 2009 | 12% |
| Apr 26 | 70°F | 47°F | 100°F 2004 | 40°F 2003 | 12% |
| Apr 27 | 70°F | 47°F | 99°F 2004 | 39°F 2003 | 11% |
| Apr 28 | 70°F | 47°F | 83°F 2007 | 40°F 2002 | 11% |
| Apr 29 | 70°F | 48°F | 96°F 2014 | 37°F 2003 | 11% |
| Apr 30 | 70°F | 48°F | 97°F 2014 | 40°F 2003 | 11% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- April 1
- sunrise 6:49 AM, sunset 7:24 PM
- April 30
- sunrise 6:12 AM, sunset 7:48 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00047851 (San Luis Obispo Poly), public domain. Records: NOAA GHCN-Daily, station USW00093206, 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.