San Mateo monthly weather averages

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 27.8 28.5 29.5 29.3 29 27.6 27.2 27.7 28.1 28.3 28.1 27.7
°F 82.1 83.2 85.1 84.8 84.1 81.7 80.9 81.9 82.6 83 82.5 81.9

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 10 6 13 55 120 139 147 159 139 134 83 25
inches 0.4 0.2 0.5 2.2 4.7 5.5 5.8 6.2 5.5 5.3 3.3 1
Rainy days 4 3 3 7 12 16 18 17 16 14 12 7

Average annual rainfall in San Mateo: 973.133mm (383.1 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 8.4 8.9 8.6 6.9 6.4 6.3 7 7.2 7.4 7.2 7.6 7.9

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 14.9 15 16.2 18 18.8 18.6 18 17.9 17.9 17.8 17.1 16
Max °C 28.2 28.8 29.8 29.6 29.2 27.9 27.4 28 28.4 28.6 28.4 28
Min °F 58.7 59 61.2 64.4 65.8 65.4 64.4 64.1 64.1 64 62.7 60.8
Max °F 70.7 71.4 73.4 74.8 75.2 73.8 72.9 73.2 73.6 73.8 72.9 71.6

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 25.9 25.5 25.6 26 26.6 26.9 26.9 27.6 28.2 28.3 28 27
°F 78.7 77.9 78 78.7 79.9 80.5 80.5 81.6 82.7 82.9 82.5 80.6

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 7 7 8 8 7 7 7 6 6 6 6 6
mph 4 5 5 5 5 5 4 4 4 4 4 4

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
75% 71% 68% 72% 76% 78% 81% 81% 81% 81% 80% 77%

Other monthly averages

UV index Best time to go?

San Mateo weather stats

San Mateo weather statistics
Hottest month: May 29°C 84.2°F
Driest month: February 6mm 0.2ins
Sunniest month: February 8.9hrs
Coldest month: January 27.8°C 82°F
Wettest month: August 159mm 6.3ins
Warmest sea: October 28.3°C 82.9°F
Map showing location of San Mateo (10.21302, -67.42365) San Mateo map pin © Google

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