Rowland Heights (CA) monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Rowland Heights

Rowland Heights average temperature chart (Celsius) Rowland Heights average temperature chart (Fahrenheit)
Average monthly temperatures in Rowland Heights (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 19.3 20.1 20 21.8 23.3 25.6 29.1 29.8 28.5 26.1 22.1 19.2
°F 66.7 68.2 67.9 71.2 73.9 78.1 84.4 85.7 83.3 78.9 71.8 66.6

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.

Rowland Heights monthly rainfall chart (mm) Rowland Heights monthly rainfall chart (inches)
Average monthly rainfall in Rowland Heights (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 82 70 63 29 6 2 1 3 8 7 46 49
inches 3.2 2.7 2.5 1.1 0.2 0.1 0 0.1 0.3 0.3 1.8 1.9
Rainy days 5 5 6 3 1 0 0 1 2 2 4 5

Average annual rainfall in Rowland Heights: 280.7mm (110.5 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Rowland Heights

Rowland Heights average daily sunshine chart
Average daily sunshine Rowland Heights
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 7.8 8.5 9.1 10.5 9.7 10.3 12.2 11.7 10 8.9 7.9 7.7

Day / night temperatures

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

Rowland Heights average minimum / maximum temperatures (Celsius) Rowland Heights average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Rowland Heights (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 6.2 7.2 8 9.3 11.9 14.1 16.2 16.9 15.4 12.6 9 6.3
Max °C 19.6 20.4 20.3 22.1 23.6 25.9 29.5 30.2 28.8 26.4 22.5 19.6
Min °F 43.2 45 46.3 48.7 53.3 57.4 61.1 62.3 59.7 54.7 48.1 43.3
Max °F 55.2 56.8 57.4 60.3 63.9 68 73 74.3 71.8 67.1 60.3 55.2

Sea temperature

The graph below shows the average sea temperature.

Rowland Heights average sea temperature chart (Celsius) Rowland Heights average sea temperature chart (Fahrenheit)
Average sea temperature around Rowland Heights in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 14.9 14.9 15.1 15.6 16.6 18 19.8 20.5 20.4 19.3 17.5 15.7
°F 58.8 58.8 59.3 60 61.8 64.4 67.6 69 68.8 66.7 63.5 60.2

Wind speed

The graph below shows the average wind speed.

Rowland Heights average winspeed by month (km/h) Rowland Heights average winspeed by month (mph)
Average wind speed in Rowland Heights (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 10 12 13 14 14 13 13 13 12 11 11 10
mph 7 7 8 9 9 8 8 8 8 7 7 6

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.

Rowland Heights relative humidity averages
Average relative humidity in Rowland Heights
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
64% 66% 65% 63% 65% 66% 66% 67% 67% 66% 65% 64%