Historical Weather in San Ramon, CA
See 55+ years of weather history for any date in San Ramon going back to 1970.
Part of California weather history
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Today in San Ramon Weather HistorySee records, averages, and 55+ years of data for today's date
→Monthly Climate Averages
Historical temperature and precipitation averages for San Ramon, CA, based on 55+ years of weather data.
Warmest MonthAugustAvg High: 83°F / Low: 59°F
Coldest MonthDecemberAvg High: 54°F / Low: 40°F
Jan
55°/ 40°
💧 10.8"
❄️ 1.3"
Feb
56°/ 41°
💧 11.1"
❄️ 2.1"
Mar
58°/ 41°
💧 8.7"
❄️ 1.8"
Apr
62°/ 42°
💧 6.6"
❄️ 4.3"
May
68°/ 47°
💧 5.7"
Jun
76°/ 53°
💧 4.5"
Jul
83°/ 60°
💧 2.4"
Aug
83°/ 59°
💧 2.7"
Sep
79°/ 57°
💧 4.5"
Oct
72°/ 52°
💧 9.5"
Nov
61°/ 45°
💧 9.7"
❄️ 2.0"
Dec
54°/ 40°
💧 11.1"
❄️ 1.1"
Temperatures in Fahrenheit. Precipitation and snowfall in inches.
San Ramon Temperature Records
- Record High: The hottest temperature ever recorded in San Ramon, CA is 116°F, set on September 5, 2022.
- Record Low: The coldest temperature ever recorded in San Ramon, CA is 14°F, set on February 6, 1989.
- Data Coverage: Based on 56 years of data from NOAA weather station: MT DIABLO JUNCTION.
All-Time Record High
116°F
September 5, 2022
All-Time Record Low
14°F
February 6, 1989
Monthly Temperature Records in San Ramon
| Month | Record High | Record Low |
|---|---|---|
| January | 81°F(2024) | 20°F(1973) |
| February | 82°F(2022) | 14°F(1989) |
| March | 90°F(2025) | 22°F(1971) |
| April | 97°F(2022) | 23°F(2008) |
| May | 104°F(2001) | 31°F(1988) |
| June | 112°F(1972) | 34°F(2000) |
| July | 114°F(2006) | 36°F(1974) |
| August | 112°F(1998) | 40°F(1972) |
| September | 116°F(2022) | 35°F(2007) |
| October | 110°F(2024) | 29°F(1971) |
| November | 89°F(1976) | 25°F(1975) |
| December | 77°F(1980) | 14°F(1990) |
San Ramon Snow RecordsSee the top 10 snowiest days ever recorded
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