San Bernardino (CA) monthly weather averages

Contents

Average daytime temperature

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

San Bernardino average temperature chart (Celsius) San Bernardino average temperature chart (Fahrenheit)
Average monthly temperatures in San Bernardino (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 18.6 20.1 20.3 23.3 25.9 30.2 34.8 34.6 31.7 27.5 22.1 18.7
°F 65.5 68.3 68.6 74 78.6 86.4 94.6 94.3 89.1 81.4 71.8 65.7

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 Bernardino monthly rainfall chart (mm) San Bernardino monthly rainfall chart (inches)
Average monthly rainfall in San Bernardino (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 70 61 56 31 11 2 2 5 9 10 37 48
inches 2.8 2.4 2.2 1.2 0.4 0.1 0.1 0.2 0.4 0.4 1.5 1.9
Rainy days 5 5 5 3 1 0 0 1 1 2 3 4

Average annual rainfall in San Bernardino: 257.433mm (101.4 inches)

Average daily sunshine

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

San Bernardino average daily sunshine chart
Average daily sunshine San Bernardino
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 7.9 8.6 9.2 10.6 10.4 11.2 12.2 11.7 10.4 9.3 8.1 7.8

Day / night temperatures

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

San Bernardino average minimum / maximum temperatures (Celsius) San Bernardino average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in San Bernardino (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 4.3 5.5 6.4 8.1 11 13.6 16.6 17 14.9 11.4 6.9 4.1
Max °C 19 20.5 20.7 23.7 26.3 30.6 35.3 35.1 32.2 27.9 22.5 19.1
Min °F 39.7 41.9 43.4 46.6 51.7 56.5 61.8 62.5 58.7 52.4 44.4 39.4
Max °F 52.9 55.4 56.3 60.6 65.5 71.8 78.6 78.8 74.3 67.3 58.5 52.9

Sea temperature

The graph below shows the average sea temperature.

San Bernardino average sea temperature chart (Celsius) San Bernardino average sea temperature chart (Fahrenheit)
Average sea temperature around San Bernardino in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 14.6 14.5 14.7 15 15.8 17.2 18.9 19.7 19.6 18.6 17 15.3
°F 58.2 58.1 58.4 58.9 60.5 62.9 66 67.5 67.3 65.6 62.6 59.6

Wind speed

The graph below shows the average wind speed.

San Bernardino average winspeed by month (km/h) San Bernardino average winspeed by month (mph)
Average wind speed in San Bernardino (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 12 13 14 15 15 14 14 14 13 12 12 11
mph 7 8 9 9 9 9 9 9 8 7 7 7

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 Bernardino relative humidity averages
Average relative humidity in San Bernardino
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
60% 60% 59% 55% 55% 56% 57% 59% 59% 58% 59% 61%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

San Bernardino weather stats

San Bernardino weather statistics
Hottest month: August 34.6°C 94.3°F
Driest month: July 2mm 0.1ins
Sunniest month: August 11.7hrs
Coldest month: January 18.6°C 65.5°F
Wettest month: January 70mm 2.8ins
Warmest sea: August 19.7°C 67.5°F
Map showing location of San Bernardino (34.10834, -117.28977) San Bernardino map pin © Google

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