Oak Harbor weather in January

In January, Oak Harbor sees average daytime highs of 45°F and overnight lows near 42°F, with 6.2 in of precipitation across 18.6 wet days and about 8.6 hours of daylight. It is the 11th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 45°F through the month. The sky is clear or mostly clear about 14% of the time in January, and the air most often feels dry.

Daylight stretches from about 8 h 12 min at the start of January to 9 h 06 min by month's end. Set against the rest of the year, January is Oak Harbor's 11th-clearest and 3rd-windiest month. For the whole year in context, see Oak Harbor's year-round climate.

Daytime high
45°
11th warmest
Overnight low
42°
1st coldest
Precipitation
6.2 in
18.6 wet days
Daylight
8 h 30 min
8:04 AM – 4:36 PM
Cloud cover
75%
11th clearest
Wind
10 mph
3rd windiest
Solar energy
1.05 kWh/m²
Travel score
0.9
out of 10

Oak Harbor is city on Whidbey Island in Island County, Washington State, United States.

Density
925/km²
people per km²
Founded
1915

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 45°F through the month.

A typical January day in Oak Harbor reaches about 45°F in the afternoon and slips back to 42°F overnight — a 4°F spread between the day's warmth and the night's chill. On most days the high lands between 40°F and 50°F. Set against its neighbours, January runs on par with December and on par with February.

30°40°50°60°151015202531
Avg high (°F)Avg low (°F)
14541
24541
34541
44541
54541
64541
74541
84541
94541
104541
114541
124541
134541
144541
154542
164542
174542
184642
194642
204642
214642
224642
234642
244642
254642
264642
274642
284642
294642
304642
314642

Oak Harbor 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
Jan45° / 42°6.218.61.48.60.9
Feb46° / 42°4.214.71.39.91.1
Mar48° / 44°4.817.90.311.61.5
Apr51° / 46°3.314013.42.3
May55° / 50°2.610.5014.93.5
Jun58° / 53°2.19.4015.84.4
Jul62° / 56°1.25.8015.56.0
Aug62° / 57°1.45.3014.16.3
Sep59° / 55°2.38.7012.45.0
Oct54° / 50°4.713.8010.63.1
Nov49° / 45°7.218.50.391.6
Dec45° / 42°6.418.11.48.20.9

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 10% of January, with mostly cloudy or overcast conditions the remaining 76%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12674
22575
32575
42575
52674
62674
72674
82674
92575
102674
112575
122575
132575
142476
152476
162476
172476
182377
192377
202377
212377
222377
232278
242377
252377
262377
272377
282476
292476
302575
312575

Chance of precipitation in January

Any precipitationSnow

Oak Harbor gets around 6.2 in of rain and snow over 18.6 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 59% and peaks near 61% on the wettest days, and about 1 day brings snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1606
2605
3605
4605
5615
6615
7616
8616
9616
10616
11616
12616
13606
14606
15605
16595
17595
18585
19584
20584
21584
22584
23584
24584
25583
26583
27583
28583
29573
30574
31564

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 10 mph in January.

Across January, daily wind ranges from about 9 mph on the calmest days to 11 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
111light breeze
211light breeze
311light breeze
411light breeze
511light breeze
611light breeze
711light breeze
811light breeze
910light breeze
1010light breeze
1110light breeze
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 8 h 12 min at the start of January to 9 h 06 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 8:08 AM to 7:50 AM, and sunset from 4:19 PM to 4:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.28:084:19
28.28:084:20
38.28:084:21
48.28:084:22
58.38:084:23
68.38:084:24
78.38:074:25
88.38:074:26
98.38:074:27
108.48:074:29
118.48:064:30
128.48:064:31
138.48:054:32
148.58:054:33
158.58:044:35
168.58:044:36
178.68:034:37
188.68:024:39
198.68:024:40
208.78:014:42
218.78:004:43
228.87:594:44
238.87:584:46
248.87:574:47
258.97:564:49
268.97:554:50
279.07:544:52
289.07:534:53
299.07:524:55
309.17:514:56
319.17:504:58

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.05 kWh/m².

For context, solar energy here swings from a low near 0.88 kWh/m² to a high of 6.3 kWh/m² in July across the year — January's 1.05 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
10.9Dim
20.9Dim
30.9Dim
40.9Dim
50.9Dim
60.9Dim
70.9Dim
80.9Dim
91.0Dim
101.0Dim
111.0Dim
121.0Dim
131.0Dim
141.0Dim
151.0Dim
161.1Dim
171.1Dim
181.1Dim
191.1Dim
201.1Dim
211.1Dim
221.2Dim
231.2Dim
241.2Dim
251.2Dim
261.3Dim
271.3Dim
281.3Dim
291.3Dim
301.4Dim
311.4Dim
Planning a trip in January

Hazard calendar for Oak Harbor

In seasonPeak

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

Oak Harbor's rainy season runs October–April, 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 Oak Harbor?

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

0.9
Sightseeing
11th-best month of the year
0.0
Beach & pool
6th-best month of the year

January is a weaker month for outdoor sightseeing in Oak Harbor.

What to pack for Oak Harbor in January

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

In January, Oak Harbor sees daytime highs around 45°F and nights near 42°F. Pack a warm layer and rain gear. Worth having: a heavy coat. About 19 days see rain.

a warm layerrain geara heavy coat

Sea temperature near Oak Harbor in January

The nearest coast averages about 46°F in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 12 mi away) is warmest in August at about 54°F and coldest in February near 46°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

45°50°55°JanFebMarAprMayJunJulAugSepOctNovDecbracing
Sea temperature (°F)Comfort
Jan46Bracing
Feb46Bracing
Mar47Bracing
Apr48Bracing
May50Bracing
Jun52Bracing
Jul53Bracing
Aug54Bracing
Sep53Bracing
Oct50Bracing
Nov49Bracing
Dec47Bracing

UV index in Oak Harbor 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 Oak Harbor peaks around July 17 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 18 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 17UV 8Dec 18UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar4Moderate
Apr5Moderate
May7High
Jun6High
Jul8Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low
Location & terrain

Where is Oak Harbor?

Oak Harbor sits at 48.3°N, 122.6°W, 95 ft above sea level, in United States. The nearest listed city is Anacortes, 15 mi away.

Topography around Oak Harbor

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

Within 2 miles, the terrain around Oak Harbor has only modest variations in elevation — a maximum elevation change of 354 ft around an average of 89 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 771 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 9,780 ft.

The land around Oak Harbor is covered by water (29%), trees (28%) and grassland (24%) within 2 miles, water (61%) and trees (23%) within 10 miles, and trees (53%) and water (34%) within 50 miles.

2 miles
354 ft
10 miles
771 ft
50 miles
9,780 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
January weather nearby: Anacortes 15 mi · Mount Vernon 17 mi · Arlington 25 mi · Marysville 27 mi · Mukilteo 29 mi · Everett 30 mi · Oak Bay 32 mi · West Lake Stevens 32 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 Oak Harbor (48.2932°, -122.6432°, elevation 95 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).