San Bruno (CA) monthly weather averages

Contents

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at San Bruno

San Bruno average temperature chart (Celsius) San Bruno average temperature chart (Fahrenheit)
Average monthly temperatures in San Bruno (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 13.2 15 15.5 16.8 18.2 20.1 21 21.3 22.2 20.6 16.5 13.4
°F 55.8 58.9 59.8 62.3 64.7 68.2 69.7 70.4 71.9 69.1 61.8 56.1

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

San Bruno monthly rainfall chart (mm) San Bruno monthly rainfall chart (inches)
Average monthly rainfall in San Bruno (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 135 101 98 45 8 4 2 2 7 36 95 106
inches 5.3 4 3.9 1.8 0.3 0.2 0.1 0.1 0.3 1.4 3.8 4.2
Rainy days 10 9 11 6 3 1 1 1 2 4 8 10

Average annual rainfall in San Bruno: 554.766mm (218.4 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in San Bruno

San Bruno average daily sunshine chart
Average daily sunshine San Bruno
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 6.4 8 9.3 11.1 11.5 11.5 11.3 10.4 10 8.8 6.4 5.6

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

San Bruno average minimum / maximum temperatures (Celsius) San Bruno average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in San Bruno (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 5.4 7.1 7.4 8 9.2 10.9 11.6 12.3 12.4 10.8 8.3 5.9
Max °C 13.4 15.2 15.7 17.1 18.4 20.4 21.2 21.6 22.4 20.9 16.8 13.6
Min °F 41.7 44.7 45.2 46.3 48.6 51.5 52.9 54.1 54.3 51.4 46.9 42.5
Max °F 48.9 52 52.7 54.5 56.8 60.1 61.5 62.4 63.3 60.4 54.5 49.5

Sea temperature

The graph below shows the average sea temperature.

San Bruno average sea temperature chart (Celsius) San Bruno average sea temperature chart (Fahrenheit)
Average sea temperature around San Bruno in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 12.4 12.2 12.2 11.8 11.8 12.2 13.1 14 14.4 14.2 13.6 12.7
°F 54.2 54 53.9 53.3 53.2 53.9 55.5 57.2 57.9 57.6 56.4 54.9

Wind speed

The graph below shows the average wind speed.

San Bruno average winspeed by month (km/h) San Bruno average winspeed by month (mph)
Average wind speed in San Bruno (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 12 14 17 19 21 21 20 19 17 14 13 13
mph 8 9 11 12 13 13 13 12 10 9 8 8

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

San Bruno relative humidity averages
Average relative humidity in San Bruno
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
78% 76% 73% 71% 70% 70% 71% 73% 71% 72% 76% 79%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

San Bruno weather stats

San Bruno weather statistics
Hottest month: September 22.2°C 72°F
Driest month: July 2mm 0.1ins
Sunniest month: April 11.1hrs
Coldest month: January 13.2°C 55.8°F
Wettest month: January 135mm 5.3ins
Warmest sea: September 14.4°C 57.9°F
Map showing location of San Bruno (37.63049, -122.41108) San Bruno map pin © Google

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