When to go · United States

When to go to Walla Walla

Twelve months of averages for Walla Walla, and what they say about when to go.

When to go

What the averages say

Mean daily highs and lows and the month's rain, averaged over 2001 to 2020.

On these averages, Walla Walla has a mean high between 18°C and 32°C and under 150 mm of rain in June to September.

Cold months (a mean high under 10°C): November to March.
The warmest month is July (27°C) and the coolest December (2°C). The wettest is December (95 mm) and the driest July (11 mm); about 680 mm of rain falls in a year.

How these sentences are worded

Each sentence is written from the figures by fixed rules, and says no more than they do. Mild to warm: a mean daily high from 18°C up to 32°C. Hot: 32°C or more. Cool: 10°C up to 18°C. Cold: under 10°C. Dry: under 50 mm of rain in the month; wet: 150 mm or more. Humid: a high of 25°C or more with relative humidity of 70% or more. A month is described as good for going when it is mild to warm and not wet.

Walla Walla: highs, lows and rainHighLowRain

The year at a glance

Mild to warm and dry
Mild to warm, humid or showery
Hot
Cool
Wet
Cold

JanCold
FebCold
MarCold
AprCool
MayCool
JunMild–warm, dry
JulMild–warm, dry
AugMild–warm, dry
SeptMild–warm, dry
OctCool
NovCold
DecCold

Month by month

Every month in Walla Walla

The whole year, with humidity, cloud and the sunlight reaching the ground.

Climate in Walla Walla by month: mean daily high and low, rain, and what the month is like
Month	High	Low	Rain	Humidity	Cloud	Sunlight (kWh/m²/day)	High in Dubai	What it is like
January	3°C	-4°C	83 mm	87%	79%	1.2	23°C	Cold
February	4°C	-4°C	69 mm	83%	68%	2.3	24°C	Cold
March	8°C	-1°C	82 mm	78%	69%	3.6	27°C	Cold
April	12°C	1°C	61 mm	73%	61%	5.4	31°C	Cool
May	17°C	5°C	62 mm	70%	56%	6.5	35°C	Cool
June	21°C	9°C	47 mm	65%	46%	7.2	37°C	Mild to warm and dry
July	27°C	13°C	11 mm	53%	26%	7.7	39°C	Mild to warm and dry
August	27°C	13°C	16 mm	49%	29%	6.4	39°C	Mild to warm and dry
September	22°C	9°C	23 mm	53%	39%	4.7	37°C	Mild to warm and dry
October	14°C	3°C	54 mm	65%	56%	3	34°C	Cool
November	7°C	-1°C	77 mm	77%	70%	1.6	29°C	Cold
December	2°C	-5°C	95 mm	86%	77%	1	25°C	Cold

The Dubai column is Dubai's mean daily high, for comparison.

Modelled averages for an area about 50 km across, not a weather station's record: NASA POWER climatology, 2001–2020. These data were obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program.

The model's grid cell sits about 616 m higher than the town, so real temperatures there run a little warmer than these.

When to go nearby

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Plan a trip to Walla Walla

Tell us when and who is travelling, and a person puts the flights, the stays and the rest into one quote.

Plan a trip to Walla Walla More about Walla Walla When to go

Month

High

Low

Rain

Humidity

Cloud

Sunlight (kWh/m²/day)

High in Dubai

What it is like

January

3°C

-4°C

83 mm

87%

79%

1.2

23°C

Cold

February

4°C

-4°C

69 mm

83%

68%

2.3

24°C

Cold

March

8°C

-1°C

82 mm

78%

69%

3.6

27°C

Cold

April

12°C

1°C

61 mm

73%

61%

5.4

31°C

Cool

May

17°C

5°C

62 mm

70%

56%

6.5

35°C

Cool

June

21°C

9°C

47 mm

65%

46%

7.2

37°C

Mild to warm and dry

July

27°C

13°C

11 mm

53%

26%

7.7

39°C

Mild to warm and dry

August

27°C

13°C

16 mm

49%

29%

6.4

39°C

Mild to warm and dry

September

22°C

9°C

23 mm

53%

39%

4.7

37°C

Mild to warm and dry

October

14°C

3°C

54 mm

65%

56%

34°C

Cool

November

7°C

-1°C

77 mm

77%

70%

1.6

29°C

Cold

December

2°C

-5°C

95 mm

86%

77%

25°C

Cold