San Luis Obispo Climate: Weather by Month and Best Time to Visit
Best months for San Luis Obispo: August, July, September, June.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 16°C | 9°C | 99 mm | 7 | – | – | 7.1 |
| February | 16°C | 9°C | 94 mm | 8 | – | – | 7.0 |
| March | 17°C | 10°C | 70 mm | 7 | – | – | 7.4 |
| April | 18°C | 10°C | 26 mm | 3 | – | – | 7.9 |
| May | 19°C | 12°C | 10 mm | 1 | – | – | 8.4 |
| June | 21°C | 13°C | 2 mm | 0 | – | – | 8.8 |
| July | 22°C | 15°C | 1 mm | 0 | – | – | 9.0 |
| August | 23°C | 15°C | 0 mm | 0 | – | – | 9.1 |
| September | 23°C | 15°C | 1 mm | 0 | – | – | 9.0 |
| October | 21°C | 14°C | 19 mm | 2 | – | – | 8.8 |
| November | 18°C | 11°C | 34 mm | 4 | – | – | 8.0 |
| December | 16°C | 9°C | 76 mm | 6 | – | – | 7.2 |