Climate almanac
Lucas Valley-Marinwood
California, United States · 38.04°, -122.58°
What is the climate like in Lucas Valley-Marinwood?
The best time to visit Lucas Valley-Marinwood is typically April – October, with trip comfort peaking in June (8.9/10). Lucas Valley-Marinwood 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, 6 km away (1894-2026)