What is the highest temperature ever recorded in San Ramon, CA?

The record high temperature in San Ramon, CA is 116°F, recorded on September 5, 2022.

What is the lowest temperature ever recorded in San Ramon, CA?

The record low temperature in San Ramon, CA is 14°F, recorded on February 6, 1989.

Historical Weather in San Ramon, CA

Name: San Ramon, CA Temperature Records
Creator: NOAA

See 55+ years of weather history for any date in San Ramon going back to 1970.

Part of California weather history · California temperature records

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Today in San Ramon Weather HistorySee records, averages, and 55+ years of data for today's date

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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, CA Temperature Range by Month

Average monthly highs and lows. The shaded band shows the typical daily temperature range.

Avg high Avg low

San Ramon, CA Monthly Precipitation

Average rainfall and snowfall per month, in inches.

Rain (in) Snow (in)

San Ramon, CA Daily Temperature Calendar

Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.

Cooler

Hotter

20°40°60°80°100°

Best Time to Visit San Ramon, CA

San Ramon, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Pleasant (65-82°F, ≤2.5" rain) Mild Less ideal

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)