San Luis Obispo, CA
Climate overview — based on NOAA 1991-2020 normals from SAN LUIS OBISPO AP, CA US.
Year-round temperatures (°F)
Climate summary
San Luis Obispo has an annual average temperature of 59.7°F with about 17.9 inches of precipitation per year. The warmest month is September (average high 79.5°F), and the coldest is December (average low 40.2°F). January is typically the wettest month (3.86 in) and August the driest (0.01 in).
Best time to visit San Luis Obispo
Full guide →Climate change signal
All-time records →196 of 366 (53.6%) of San Luis Obispo's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1990s | 15 | |
| 2000s | 95 | |
| 2010s | 158 | |
| 2020s | 98 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 65.0°F | 40.6°F | 52.8°F | 3.86 in | — | 8 |
| February | 65.1°F | 42.4°F | 53.8°F | 3.54 in | — | 10 |
| March | 66.7°F | 44.5°F | 55.6°F | 3.17 in | — | 9 |
| April | 69.1°F | 45.6°F | 57.4°F | 1.05 in | — | 6 |
| May | 72.0°F | 47.8°F | 59.9°F | 0.47 in | — | 3 |
| June | 75.2°F | 51.1°F | 63.2°F | 0.10 in | — | 1 |
| July | 78.0°F | 54.3°F | 66.1°F | 0.08 in | — | 0 |
| August | 79.3°F | 54.9°F | 67.1°F | 0.01 in | — | 1 |
| September | 79.5°F | 53.4°F | 66.4°F | 0.04 in | — | 1 |
| October | 77.2°F | 49.7°F | 63.5°F | 0.92 in | — | 4 |
| November | 71.1°F | 44.7°F | 57.9°F | 1.43 in | — | 6 |
| December | 64.9°F | 40.2°F | 52.6°F | 3.27 in | — | 9 |
Climate twins of San Luis Obispo
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).