Surprise (AZ) monthly weather averages

Average daytime temperature

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

Surprise average temperature chart (Celsius) Surprise average temperature chart (Fahrenheit)
Average monthly temperatures in Surprise (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 18.8 21.6 24 29.1 34.1 39.5 41.2 39.7 36.6 30.9 23.6 18.9
°F 65.9 70.9 75.3 84.4 93.4 103.1 106.2 103.5 98 87.7 74.6 66.1

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.

Surprise monthly rainfall chart (mm) Surprise monthly rainfall chart (inches)
Average monthly rainfall in Surprise (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 21 19 22 5 3 2 18 29 22 14 16 18
inches 0.8 0.7 0.9 0.2 0.1 0.1 0.7 1.1 0.9 0.6 0.6 0.7
Rainy days 4 4 4 2 1 1 4 5 3 3 3 4

Average annual rainfall in Surprise: 108.033mm (42.5 inches)

Average daily sunshine

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

Surprise average daily sunshine chart
Average daily sunshine Surprise
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 9 9.8 11 12.5 13.7 14.5 13 12.4 11.7 10.7 9.3 8.6

Day / night temperatures

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

Surprise average minimum / maximum temperatures (Celsius) Surprise average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Surprise (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 3.4 5.4 7.6 10.9 15.3 20 25 24.1 20.2 13.5 7.2 3.5
Max °C 19.2 22 24.5 29.6 34.6 40 41.6 40.1 37.1 31.4 24.1 19.3
Min °F 38.1 41.7 45.6 51.5 59.5 68 77 75.4 68.3 56.2 44.9 38.3
Max °F 52.3 56.7 60.8 68.4 76.8 86 91.9 89.8 83.5 72.3 60.1 52.5

Sea temperature

The graph below shows the average sea temperature.

Surprise average sea temperature chart (Celsius) Surprise average sea temperature chart (Fahrenheit)
Average sea temperature around Surprise in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 14.9 14.7 15.1 15.9 17.3 19.1 21.1 22.2 21.9 20.3 18.1 16
°F 58.8 58.5 59.2 60.7 63.2 66.5 70 71.9 71.4 68.5 64.5 60.7

Wind speed

The graph below shows the average wind speed.

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

Surprise relative humidity averages
Average relative humidity in Surprise
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
51% 44% 39% 29% 23% 20% 33% 37% 37% 37% 44% 52%