Historical weather data, all-time temperature records, and monthly climate averages for Martinez, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
We're currently missing specific historical data for today's date in Martinez — check back as our records continue to grow. What we can say is that Martinez sits in the Carquinez Strait corridor, where marine influence from the Bay keeps things interesting year-round.
Martinez has seen some serious extremes over its 30-year record: a scorching 111° in July 2006 on the hot end, and a bitter 24° in December 1998 on the cold end. That 87-degree swing tells the story of a city caught between inland heat and Bay Area cool.
Martinez runs warmest from late August through early September, with average highs peaking around 85°, while January sits at the opposite end at just 53°. The dry season is long — rainfall is essentially zero through the summer months — making spring and fall the sweet spot for comfortable visits.