Climate almanac
San Rafael
California, United States · 37.97°, -122.53°
What is the climate like in San Rafael?
The best time to visit San Rafael is typically April – October, with trip comfort peaking in June (8.9/10). San Rafael is warmest in September, when daily highs average 75°F (24°C), and coolest in December, when lows fall to about 45°F (7°C). The wettest month is typically January and the driest is August; the year sees roughly 23 in (594 mm) of precipitation.
- Best time to visitApril – October — comfort peaks in June (8.9/10)
- Warmest monthSeptember — average high 75°F (24°C)
- Coolest monthDecember — average low 45°F (7°C)
- Wettest monthJanuary (5.0 in (126 mm))
- Driest monthAugust (0.1 in (2 mm))
- Annual precipitation23 in (594 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromSan Rafael-civic Ctr, 3 km away (1894-2026)