Saint Johns (AZ) monthly weather averages

Average daytime temperature

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

Saint Johns average temperature chart (Celsius) Saint Johns average temperature chart (Fahrenheit)
Average monthly temperatures in Saint Johns (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8 11.4 14.4 19.4 24.4 29.9 31.3 29.8 26.2 21 14 8.6
°F 46.4 52.6 58 66.9 76 85.8 88.4 85.6 79.2 69.9 57.2 47.5

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.

Saint Johns monthly rainfall chart (mm) Saint Johns monthly rainfall chart (inches)
Average monthly rainfall in Saint Johns (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 17 13 20 11 10 11 47 53 31 27 15 17
inches 0.7 0.5 0.8 0.4 0.4 0.4 1.8 2.1 1.2 1.1 0.6 0.7
Rainy days 5 5 5 3 3 3 9 9 6 5 4 5

Average annual rainfall in Saint Johns: 196.366mm (77.3 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Saint Johns

Saint Johns average daily sunshine chart
Average daily sunshine Saint Johns
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 8.4 9 9.9 11.5 12.7 13.4 11.6 11.1 10.7 10 8.6 8

Day / night temperatures

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

Saint Johns average minimum / maximum temperatures (Celsius) Saint Johns average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Saint Johns (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -8.2 -5.7 -2.5 0.8 5.3 10.1 14.5 13.5 9.2 2.5 -3.4 -7.8
Max °C 8.4 11.9 14.9 19.9 24.9 30.4 31.8 30.2 26.7 21.5 14.4 9
Min °F 17.2 21.8 27.6 33.4 41.5 50.1 58 56.2 48.5 36.5 25.9 18
Max °F 32.2 37.6 43.2 50.5 59.2 68.4 73.6 71.2 64.2 53.6 41.9 33.1

Sea temperature

The graph below shows the average sea temperature.

Saint Johns average sea temperature chart (Celsius) Saint Johns average sea temperature chart (Fahrenheit)
Average sea temperature around Saint Johns in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 14 13.8 14.1 14.8 16.1 17.8 19.7 20.9 20.4 18.7 16.8 15
°F 57.2 56.9 57.4 58.6 60.9 64.1 67.5 69.6 68.8 65.7 62.2 59

Wind speed

The graph below shows the average wind speed.

Saint Johns average winspeed by month (km/h) Saint Johns average winspeed by month (mph)
Average wind speed in Saint Johns (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 12 14 17 18 17 17 15 14 14 13 13 12
mph 8 9 10 11 11 10 9 9 9 8 8 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.

Saint Johns relative humidity averages
Average relative humidity in Saint Johns
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
62% 53% 43% 34% 29% 26% 42% 48% 47% 46% 53% 61%