San Mateo (CA) monthly weather averages

Contents

Average daytime temperature

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

San Mateo average temperature chart (Celsius) San Mateo average temperature chart (Fahrenheit)
Average monthly temperatures in San Mateo (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 13.5 15.6 16.6 18.4 20 22.1 22.9 23.2 23.8 21.7 17.2 13.7
°F 56.2 60.1 61.9 65.1 67.9 71.8 73.3 73.8 74.8 71.1 63 56.6

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 Mateo monthly rainfall chart (mm) San Mateo monthly rainfall chart (inches)
Average monthly rainfall in San Mateo (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 95 71 70 33 6 2 1 1 4 25 64 73
inches 3.7 2.8 2.8 1.3 0.2 0.1 0 0 0.2 1 2.5 2.9
Rainy days 10 9 10 6 2 1 0 1 1 4 8 9

Average annual rainfall in San Mateo: 360.733mm (142 inches)

Average daily sunshine

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

San Mateo average daily sunshine chart
Average daily sunshine San Mateo
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 6.3 8 9.4 11.1 11.6 11.7 11.5 10.6 10.1 8.9 6.5 5.6

Day / night temperatures

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

San Mateo average minimum / maximum temperatures (Celsius) San Mateo average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in San Mateo (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 5.6 7.4 8 8.8 10.2 11.9 12.6 13.2 13.2 11.3 8.6 6
Max °C 13.7 15.8 16.8 18.6 20.2 22.4 23.2 23.5 24.1 22 17.5 13.9
Min °F 42 45.3 46.4 47.8 50.4 53.3 54.7 55.7 55.7 52.3 47.4 42.7
Max °F 49.3 52.9 54.3 56.7 59.4 62.8 64.2 64.9 65.5 61.9 55.4 49.8

Sea temperature

The graph below shows the average sea temperature.

San Mateo average sea temperature chart (Celsius) San Mateo average sea temperature chart (Fahrenheit)
Average sea temperature around San Mateo 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 Mateo average winspeed by month (km/h) San Mateo average winspeed by month (mph)
Average wind speed in San Mateo (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 16 14 13 13
mph 8 9 11 12 13 13 12 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 Mateo relative humidity averages
Average relative humidity in San Mateo
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
79% 77% 73% 70% 69% 68% 69% 71% 70% 71% 76% 79%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

San Mateo weather stats

San Mateo weather statistics
Hottest month: September 23.8°C 74.8°F
Driest month: July 1mm 0ins
Sunniest month: April 11.1hrs
Coldest month: January 13.5°C 56.3°F
Wettest month: January 95mm 3.7ins
Warmest sea: September 14.4°C 57.9°F
Map showing location of San Mateo (37.56299, -122.32553) San Mateo map pin © Google

Locations nearby

Top United States locations