Walla Walla (WA) monthly weather averages

Contents

Average daytime temperature

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

Walla Walla average temperature chart (Celsius) Walla Walla average temperature chart (Fahrenheit)
Average monthly temperatures in Walla Walla (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 4.8 8.8 13.1 17.1 21.7 26.9 31.2 30.4 24.9 18.2 10 5.4
°F 40.7 47.9 55.6 62.8 71.1 80.3 88.1 86.8 76.9 64.7 50 41.8

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.

Walla Walla monthly rainfall chart (mm) Walla Walla monthly rainfall chart (inches)
Average monthly rainfall in Walla Walla (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 53 39 44 36 38 27 12 17 20 35 57 54
inches 2.1 1.5 1.7 1.4 1.5 1.1 0.5 0.7 0.8 1.4 2.2 2.1
Rainy days 11 10 10 8 7 6 3 4 5 6 11 12

Average annual rainfall in Walla Walla: 357.866mm (140.9 inches)

Average daily sunshine

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

Walla Walla average daily sunshine chart
Average daily sunshine Walla Walla
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 2 3.5 6.2 8 10 11.6 13.4 12 9.7 7 2.6 1.6

Day / night temperatures

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

Walla Walla average minimum / maximum temperatures (Celsius) Walla Walla average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Walla Walla (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -2.2 0.4 2.7 5 8.6 12.8 15.5 15 10.3 5.3 1.4 -1.8
Max °C 5 9.1 13.4 17.4 22.1 27.2 31.6 30.8 25.3 18.5 10.2 5.6
Min °F 28 32.6 36.8 41 47.4 55 59.8 59 50.5 41.5 34.5 28.8
Max °F 34.5 40.5 46.4 52.2 59.5 68 74.3 73.2 64 53.4 42.4 35.4

Sea temperature

The graph below shows the average sea temperature.

Walla Walla average sea temperature chart (Celsius) Walla Walla average sea temperature chart (Fahrenheit)
Average sea temperature around Walla Walla in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 8.3 8.2 8.3 8.6 9.4 10.9 12.6 13.6 13.1 11.6 10 8.8
°F 46.9 46.7 46.9 47.4 48.9 51.6 54.7 56.4 55.6 52.9 50 47.8

Wind speed

The graph below shows the average wind speed.

Walla Walla average winspeed by month (km/h) Walla Walla average winspeed by month (mph)
Average wind speed in Walla Walla (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 13 14 15 16 15 15 14 14 13 12 13 13
mph 8 9 9 10 9 9 9 9 8 8 8 8

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.

Walla Walla relative humidity averages
Average relative humidity in Walla Walla
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
79% 75% 65% 58% 53% 48% 38% 40% 49% 61% 76% 80%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Walla Walla weather stats

Walla Walla weather statistics
Hottest month: July 31.2°C 88.2°F
Driest month: July 12mm 0.5ins
Sunniest month: July 13.4hrs
Coldest month: January 4.8°C 40.6°F
Wettest month: November 57mm 2.2ins
Warmest sea: August 13.6°C 56.5°F
Map showing location of Walla Walla (46.06458, -118.34302) Walla Walla map pin © Google

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