Climate almanac

Castroville

California, United States · 36.77°, -121.76°

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What is the climate like in Castroville?

The best time to visit Castroville is typically April – November, with trip comfort peaking in September (8.7/10). Castroville is warmest in September, when daily highs average 71°F (21°C), and coolest in February, when lows fall to about 46°F (8°C). The wettest month is typically January and the driest is July; the year sees roughly 20 in (501 mm) of precipitation.

  • Best time to visitApril – November — comfort peaks in September (8.7/10)
  • Warmest monthSeptember — average high 71°F (21°C)
  • Coolest monthFebruary — average low 46°F (8°C)
  • Wettest monthJanuary (4.4 in (112 mm))
  • Driest monthJuly (0.1 in (2 mm))
  • Annual precipitation20 in (501 mm)
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
  • Records fromWatsonville Wtr Wks, 18 km away (1908-2026)