Annual mean 12°C · wettest around February · prevailing wind SW
Warmest
30.4 °C
Coldest
1.8 °C
Wettest
19%
Windiest
4.4 m/s
Prevailing
SW
3.5 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Walla Walla over the whole year is 12°C. July is the hottest month, with highs of about 31°C; January is the coldest, with lows of about -0°C. Walla Walla has no sharply defined rainy season: the chance of rain on a given day runs from 5% in July, the driest month, to 14% in February, the wettest. Winds in Walla Walla are highest in April, averaging 3.5 m/s (13 km/h), and lightest in December, at 2.7 m/s (10 km/h). The prevailing wind is from the SW. The clearest skies in Walla Walla come in July, when the sky is typically 6% covered; December is the cloudiest month, at 68%.
Month by month Walla Walla climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
3°C
-0°C
-2°C
14%
64%
2.8 m/s
0
0
8
February
5°C
-0°C
-0°C
14%
56%
3.3 m/s
0
0
17
March
10°C
3°C
5°C
13%
45%
3.3 m/s
4
0
43
April
14°C
6°C
10°C
12%
37%
3.5 m/s
23
0
71
May
20°C
11°C
16°C
11%
31%
3.3 m/s
58
11
75
June
25°C
15°C
21°C
9%
22%
3.4 m/s
70
28
60
July
31°C
19°C
26°C
5%
6%
3.2 m/s
61
63
29
August
29°C
17°C
26°C
6%
9%
3.0 m/s
65
57
34
September
22°C
12°C
19°C
8%
23%
2.8 m/s
76
21
71
October
15°C
7°C
12°C
12%
32%
2.8 m/s
34
1
76
November
8°C
3°C
4°C
13%
54%
2.9 m/s
4
0
30
December
2°C
-0°C
-2°C
14%
68%
2.7 m/s
0
0
8
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Walla Walla weather by season
Year round, Walla Walla has days of about 2°C at their warmest in December, its coolest month, and 31°C in July, its warmest; the coolest hours of the day run from -0°C to 19°C through the year, and the average temperature over the year is 12°C around the clock. Rain is most likely around February and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Walla Walla weather in winterDecember to February
High 3°CLow -0°CRain 14%
Winter in Walla Walla has typical daily highs of about 3°C and lows of about -0°C, with a 14% chance of rain on a given day.
Walla Walla weather in springMarch to May
High 15°CLow 7°CRain 12%
Spring in Walla Walla has typical daily highs of about 15°C and lows of about 7°C, with a 12% chance of rain on a given day.
Walla Walla weather in summerJune to August
High 28°CLow 17°CRain 7%
Summer in Walla Walla has typical daily highs of about 28°C and lows of about 17°C, with a 7% chance of rain on a given day.
Walla Walla weather in autumnSeptember to November
High 15°CLow 7°CRain 11%
Autumn in Walla Walla has typical daily highs of about 15°C and lows of about 7°C, with a 11% chance of rain on a given day.
When is the rainy season in Walla Walla?
Walla Walla has no sharply defined rainy season: the chance of rain on a given day runs from 5% in July, the driest month, to 14% in February, the wettest.
What time of year is Walla Walla windiest?
Winds in Walla Walla are highest in April, averaging 3.5 m/s (13 km/h), and lightest in December, at 2.7 m/s (10 km/h). The prevailing wind is from the SW.
What is the average temperature in Walla Walla year round?
The average temperature in Walla Walla over the whole year is 12°C. July is the hottest month, with highs of about 31°C; January is the coldest, with lows of about -0°C.