Historical weather data, all-time temperature records, and monthly climate averages for Danville, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
July 23rd is historically the hottest day of the year in Danville — and it earned that reputation in dramatic fashion. On this exact date in 2006, the thermometer hit 114°, the highest temperature ever recorded here in over 30 years of data.
Danville runs warm for the Bay Area, with summer highs regularly cresting into the 80s and an all-time peak of 114° set in July 2006. Winters are mild but not without bite — the mercury has dropped as low as 25°, recorded on January 13, 1997.
Danville's peak warmth runs late July through August, with average highs in the low 80s, while December and January are the coolest months, hovering in the low 50s. The wet season is concentrated in winter, making spring and fall the sweet spot for comfortable, dry weather. If you're planning around heat, give September a look — still warm at 81° but with summer's intensity fading fast.