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Climate tables. Data for San Ramon.


Monthly temperature

Month Record low Average low Average Average high Record high
january 17.4 (1990) 22.9 26.4 31.4 36.9 (2016)
february -17.8 (1985) 22.9 26.3 31.1 36.0 (1987)
march 15.0 (1987) 23.1 26.6 31.5 37.0 (2001)
april 12.6 (2005) 22.4 26.5 31.7 36.9 (2016)
may 8.3 (1997) 20.4 25.0 30.5 36.8 (2003)
june 8.5 (2001) 18.8 24.2 30.8 37.4 (2010)
july 3.0 (1988) 17.1 23.9 31.6 38.0 (1984)
august 5.1 (2019) 18.2 25.1 33.4 38.9 (2010)
september 9.1 (1997) 20.4 26.2 34.1 39.9 (2015)
october 14.2 (1999) 22.1 27.0 33.9 41.0 (1994)
november 12.0 (1992) 22.3 26.6 32.3 40.2 (2020)
december 15.6 (2010) 22.9 26.7 31.8 39.5 (1987)
year () ()
graphic

Monthly precipitation

Month Average Record low Record high Daily high
january 208.3 83.8 (2020) 378.0 (2004) 76.7 (2004)
february 219.2 112.0 (2001) 382.0 (2012) 94.8 (2012)
march 160.9 44.8 (2020) 271.0 (2016) 97.2 (2015)
april 79.6 10.0 (2010) 173.0 (2011) 102.2 (2011)
may 55.3 1.0 (2016) 156.0 (2006) 39.2 (2012)
june 18.1 0.0 (2007) 63.0 (2013) 23.0 (2008)
july 18.1 0.0 (1997) 74.0 (2005) 33.3 (2012)
august 21.3 0.0 (2010) 98.0 (2002) 74.3 (2016)
september 60.7 2.0 (2015) 136.0 (2003) 98.2 (2008)
october 105.8 15.0 (2015) 248.0 (2002) 77.8 (2010)
november 131.5 25.0 (2020) 258.0 (2011) 63.0 (2011)
december 212.9 87.0 (2001) 374.0 (2013) 93.0 (2019)
year () () ()
graphic

Number of days with solid, liquid, and mixed precipitation

Type of precipitation jan feb mar apr may jun jul aug sep oct nov dec Year

Wind speed, m/s

jan feb mar apr may jun jul aug sep oct nov dec Year

The frequency of different wind directions, %

direction jan feb mar apr may jun jul aug sep oct nov dec Year
graphic graphic graphic graphic

Air humidity, %

jan feb mar apr may jun jul aug sep oct nov dec Year

Snow cover

Month jul aug sep oct nov dec jan feb mar apr may jun Year
number of days
height (sm)  
max height (sm)

Cloudy, score

month jan feb mar apr may jun jul aug sep oct nov dec Year
total
low

Number of clear, cloudy and cloudy days

month jan feb mar apr may jun jul aug sep oct nov dec Year
Total cloud
Low cloud

Number of days with different phenomena

phenomenon jan feb mar apr may jun jul aug sep oct nov dec Year

The frequency of different types of clouds, %

type of clouds jan feb mar apr may jun jul aug sep oct nov dec Year