Walla Walla weather in January

In January, Walla Walla sees average daytime highs of 39°F and overnight lows near 29°F, with 3.3 in of precipitation across 14.2 wet days and about 8.9 hours of daylight. It is the 11th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 38°F in the first days to 41°F by the end. The sky is clear or mostly clear about 19% of the time in January, and the air most often feels dry.

Daylight stretches from about 8 h 30 min at the start of January to 9 h 24 min by month's end. Set against the rest of the year, January is Walla Walla's 12th-clearest and 6th-windiest month. For the whole year in context, see Walla Walla's year-round climate.

Daytime high
39°
11th warmest
Overnight low
29°
2nd coldest
Precipitation
3.3 in
14.2 wet days
Daylight
8 h 48 min
7:38 AM – 4:27 PM
Cloud cover
70%
12th clearest
Wind
6 mph
6th windiest
Solar energy
1.51 kWh/m²
Travel score
0.0
out of 10

Walla Walla is city in Walla Walla County, Washington, United States.

Density
970/km²
people per km²
Founded
1856

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 38°F in the first days to 41°F by the end.

A typical January day in Walla Walla reaches about 39°F in the afternoon and slips back to 29°F overnight — a 11°F spread between the day's warmth and the night's chill. On most days the high lands between 30°F and 48°F. Set against its neighbours, January runs on par with December and about 4°F cooler than February.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
13827
23827
33827
43827
53827
63827
73828
83828
93828
103828
113828
123828
133928
143928
153929
163929
173929
183929
194029
204029
214029
224029
234029
244029
254029
264029
274129
284129
294129
304129
314129

How January really feels in Walla Walla

Once humidity and wind are folded in, January averages 0 days that feel above 90°F and 31 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
31
wind chill below the day's low

The story in January is cold — wind chill drags the overnight "feels like" below the raw low.

Walla Walla weather by month

How January compares with the rest of the year at a glance. January is the 11th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan39° / 29°3.314.28.68.90.0
Feb44° / 30°2.6126.3100.6
Mar50° / 34°2.913.4511.62.2
Apr58° / 38°2.211.51.713.34.0
May66° / 45°2.19.70.214.76.2
Jun74° / 50°1.36.3015.57.5
Jul84° / 57°0.32015.27.3
Aug83° / 56°0.42.10147.5
Sep73° / 49°0.84.1012.38.1
Oct60° / 40°2.18.80.310.75.0
Nov46° / 33°3.313.65.19.21.1
Dec38° / 28°3.614.39.28.50.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in January, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of January, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13169
23070
33070
42971
52971
62971
72971
83070
93070
103070
113070
123169
133169
143169
153268
163367
173367
183466
193565
203565
213664
223664
233664
243664
253664
263664
273664
283664
293664
303664
313664

Chance of precipitation in January

Any precipitationSnow

Walla Walla gets around 3.3 in of rain and snow over 14.2 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 46% and peaks near 48% on the wettest days, and about 9 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
14530
24630
34630
44730
54730
64729
74829
84829
94829
104829
114829
124829
134829
144829
154728
164728
174728
184627
194627
204527
214527
224427
234426
244426
254426
264326
274325
284325
294224
304224
314123

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in January

Winds average 6 mph in January.

Across January, daily wind ranges from about 6 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 8 h 30 min at the start of January to 9 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over January. Sunrise moves from 7:42 AM to 7:26 AM, and sunset from 4:11 PM to 4:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.57:424:11
28.57:424:12
38.57:424:13
48.57:424:14
58.67:424:15
68.67:414:16
78.67:414:17
88.67:414:18
98.67:414:19
108.77:414:20
118.77:404:21
128.77:404:22
138.77:404:24
148.87:394:25
158.87:394:26
168.87:384:27
178.87:384:28
188.97:374:30
198.97:364:31
208.97:364:32
219.07:354:34
229.07:344:35
239.07:344:36
249.17:334:38
259.17:324:39
269.27:314:40
279.27:304:42
289.27:294:43
299.37:284:45
309.37:274:46
319.47:264:47

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.51 kWh/m².

For context, solar energy here swings from a low near 1.28 kWh/m² to a high of 7.84 kWh/m² in July across the year — January's 1.51 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.3Dim
21.3Dim
31.3Dim
41.3Dim
51.3Dim
61.4Dim
71.4Dim
81.4Dim
91.4Dim
101.4Dim
111.4Dim
121.4Dim
131.4Dim
141.5Dim
151.5Dim
161.5Dim
171.5Dim
181.6Dim
191.6Dim
201.6Dim
211.6Dim
221.7Dim
231.7Dim
241.7Dim
251.8Dim
261.8Dim
271.8Dim
281.8Dim
291.9Dim
301.9Dim
311.9Dim
Planning a trip in January

Hazard calendar for Walla Walla

In seasonPeak

In January, Walla Walla sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Walla Walla's rainy season runs October–May, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit Walla Walla?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

0.0
Sightseeing
11th-best month of the year
0.0
Beach & pool
9th-best month of the year

January is a weaker month for outdoor sightseeing in Walla Walla.

What to pack for Walla Walla in January

From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In January, Walla Walla sees daytime highs around 39°F and nights near 29°F. Pack a warm layer, a heavy coat and rain gear. About 14 days see rain.

a warm layera heavy coatrain gear

UV index in Walla Walla in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Walla Walla peaks around July 15 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highVery highHighModerateLowJul 15UV 8Dec 15UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5Moderate
May7Very high
Jun7High
Jul9Very high
Aug6High
Sep5Moderate
Oct4Moderate
Nov1Low
Dec1Low

Air quality in Walla Walla in January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January falls, not just the annual average.

Air quality in Walla Walla is worst in August — around 29 µg/m³ PM2.5 (moderate), about 4.4× the cleanest month (December, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodAug 1827 µg/m³Dec 237 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar11Good
Apr11Good
May9Good
Jun9Good
Jul16Moderate
Aug29Moderate
Sep20Moderate
Oct12Moderate
Nov12Good
Dec7Good
Location & terrain

Where is Walla Walla?

Walla Walla sits at 46.1°N, 118.3°W, 942 ft above sea level, in United States. The nearest listed city is Pendleton, 35 mi away.

Topography around Walla Walla

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Walla Walla.

Within 2 miles, the terrain around Walla Walla has only modest variations in elevation — a maximum elevation change of 272 ft around an average of 945 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,333 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 6,115 ft.

The land around Walla Walla is covered by artificial surfaces (34%), trees (26%) and grassland (23%) within 2 miles, cropland (67%) and grassland (23%) within 10 miles, and grassland (44%), cropland (29%) and trees (24%) within 50 miles.

2 miles
272 ft
10 miles
3,333 ft
50 miles
6,115 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Pendleton 35 mi · Pasco 39 mi · Kennewick 39 mi · Tri-Cities 43 mi · Richland 48 mi · Hermiston 48 mi · Lewiston 68 mi · Lewiston Orchards 69 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Walla Walla (46.0646°, -118.343°, elevation 942 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).