Porterville (CA) monthly weather averages

Average daytime temperature

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

Porterville average temperature chart (Celsius) Porterville average temperature chart (Fahrenheit)
Average monthly temperatures in Porterville (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 12.6 16.7 19.7 23.8 28.8 33.3 36.4 35.4 31.9 26.6 18.6 12.6
°F 54.7 62.1 67.5 74.8 83.9 92 97.6 95.6 89.5 79.9 65.4 54.7

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.

Porterville monthly rainfall chart (mm) Porterville monthly rainfall chart (inches)
Average monthly rainfall in Porterville (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 48 43 44 28 9 2 1 1 8 14 33 37
inches 1.9 1.7 1.7 1.1 0.4 0.1 0 0 0.3 0.5 1.3 1.4
Rainy days 6 6 6 4 1 1 0 0 1 2 4 5

Average annual rainfall in Porterville: 183.3mm (72.2 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Porterville

Porterville average daily sunshine chart
Average daily sunshine Porterville
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.8 7.8 9.5 11.5 12.7 13.7 13.8 12.9 11.7 10.1 7.1 5.5

Day / night temperatures

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

Porterville average minimum / maximum temperatures (Celsius) Porterville average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Porterville (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 2.4 4.8 6.4 8.5 12 15.3 17.9 17.2 14.7 10.2 5.3 2.2
Max °C 12.9 17 20.1 24.2 29.3 33.8 36.9 35.8 32.4 27 18.9 12.9
Min °F 36.2 40.6 43.4 47.2 53.5 59.5 64.2 63 58.4 50.4 41.5 35.9
Max °F 45.7 51.6 55.8 61.3 69.1 76.1 81.3 79.7 74.3 65.5 53.8 45.5

Sea temperature

The graph below shows the average sea temperature.

Porterville average sea temperature chart (Celsius) Porterville average sea temperature chart (Fahrenheit)
Average sea temperature around Porterville in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 13.1 13 12.9 12.8 13.3 14.4 16 16.8 16.8 16.2 15.1 13.7
°F 55.6 55.4 55.2 55.1 56 57.9 60.7 62.2 62.3 61.2 59.1 56.7

Wind speed

The graph below shows the average wind speed.

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

Porterville relative humidity averages
Average relative humidity in Porterville
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
76% 70% 63% 53% 43% 39% 36% 42% 46% 53% 67% 77%