Cottage Lake weather in January

In January, Cottage Lake sees average daytime highs of 45°F and overnight lows near 36°F, with 9.0 in of precipitation across 19 wet days and about 8.7 hours of daylight. It is the 11th-warmest and 2nd-wettest month of the year here.

Highs climb over the month, from about 44°F in the first days to 47°F by the end. The sky is clear or mostly clear about 15% of the time in January, and the air most often feels dry.

Daylight stretches from about 8 h 18 min at the start of January to 9 h 12 min by month's end. Set against the rest of the year, January is Cottage Lake's 11th-clearest and 2nd-windiest month. For the whole year in context, see Cottage Lake's year-round climate.

Daytime high
45°
11th warmest
Overnight low
36°
2nd coldest
Precipitation
9.0 in
19 wet days
Daylight
8 h 36 min
7:59 AM – 4:36 PM
Cloud cover
77%
11th clearest
Wind
6 mph
2nd windiest
Solar energy
1 kWh/m²
Travel score
0.8
out of 10

Cottage Lake is census designated place in King County, Washington, United States.

Density
381/km²
people per km²

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 44°F in the first days to 47°F by the end.

A typical January day in Cottage Lake reaches about 45°F in the afternoon and slips back to 36°F overnight — a 9°F spread between the day's warmth and the night's chill. On most days the high lands between 38°F and 52°F. Set against its neighbours, January runs on par with December and about 3°F cooler than February.

20°30°40°50°60°151015202531
Avg high (°F)Avg low (°F)
14435
24435
34435
44435
54435
64435
74435
84435
94435
104435
114535
124535
134535
144536
154536
164536
174536
184536
194636
204636
214636
224636
234636
244636
254637
264637
274737
284737
294737
304737
314737

How January really feels in Cottage Lake

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.

Cottage Lake weather by month

How January compares with the rest of the year at a glance. January is the 11th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan45° / 36°9.01948.70.8
Feb48° / 36°6.115.52.99.91.5
Mar52° / 38°7.119.12.311.62.2
Apr57° / 41°5.916.70.313.43.4
May63° / 46°4.113.2014.95.1
Jun67° / 51°3.511.4015.75.9
Jul73° / 54°1.66.3015.47.6
Aug74° / 54°1.85.7014.17.8
Sep68° / 49°3.79.2012.46.5
Oct58° / 43°7.415.3010.63.8
Nov49° / 38°9.919.10.99.11.6
Dec44° / 35°8.718.73.98.30.6

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 9% of January, with mostly cloudy or overcast conditions the remaining 76%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12278
22377
32377
42377
52377
62377
72377
82377
92377
102377
112476
122476
132377
142377
152476
162476
172476
182476
192476
202476
212476
222476
232476
242476
252476
262476
272476
282575
292575
302575
312575

Chance of precipitation in January

Any precipitationSnow

Cottage Lake gets around 9.0 in of rain and snow over 19 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 60% and peaks near 62% on the wettest days, and about 4 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
16216
26216
36216
46215
56215
66215
76215
86215
96215
106214
116114
126114
136114
146013
156013
166013
175912
185912
195912
205912
215911
225911
235911
246011
256010
266010
276010
286010
295910
30599
31589

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 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
47calm
57calm
67calm
77calm
87calm
97calm
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 18 min at the start of January to 9 h 12 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 8:03 AM to 7:46 AM, and sunset from 4:19 PM to 4:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.38:034:19
28.38:034:20
38.38:034:21
48.38:034:22
58.38:034:23
68.48:034:24
78.48:034:25
88.48:034:26
98.48:024:27
108.48:024:29
118.58:024:30
128.58:014:31
138.58:014:32
148.68:004:33
158.68:004:35
168.67:594:36
178.67:594:37
188.77:584:39
198.77:574:40
208.77:574:41
218.87:564:43
228.87:554:44
238.97:544:45
248.97:534:47
258.97:524:48
269.07:514:50
279.07:504:51
289.17:494:53
299.17:484:54
309.17:474:56
319.27:464:57

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1 kWh/m².

For context, solar energy here swings from a low near 0.86 kWh/m² to a high of 6.13 kWh/m² in July across the year — January's 1 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
90.9Dim
100.9Dim
110.9Dim
120.9Dim
130.9Dim
141.0Dim
151.0Dim
161.0Dim
171.0Dim
181.0Dim
191.1Dim
201.1Dim
211.1Dim
221.1Dim
231.1Dim
241.1Dim
251.2Dim
261.2Dim
271.2Dim
281.3Dim
291.3Dim
301.3Dim
311.3Dim
Planning a trip in January

Hazard calendar for Cottage Lake

In seasonPeak

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

Cottage Lake'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 Cottage Lake?

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

0.8
Sightseeing
11th-best month of the year
0.0
Beach & pool
8th-best month of the year

January is a weaker month for outdoor sightseeing in Cottage Lake.

What to pack for Cottage Lake in January

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

In January, Cottage Lake sees daytime highs around 45°F and nights near 36°F. Pack a warm layer and rain gear. Worth having: a heavy coat. About 19 days see rain.

a warm layerrain geara heavy coat

UV index in Cottage Lake 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 Cottage Lake 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 17 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 17UV 1
UV index (midday)Level
Jan1Low
Feb1Low
Mar4Moderate
Apr5Moderate
May7High
Jun6High
Jul8Very high
Aug6High
Sep4Moderate
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Cottage Lake 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 Cottage Lake is worst in August — around 20 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodModerateGoodAug 2119 µg/m³Dec 157 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar12Moderate
Apr12Good
May13Moderate
Jun11Good
Jul10Good
Aug20Moderate
Sep18Moderate
Oct11Good
Nov7Good
Dec6Good
Location & terrain

Where is Cottage Lake?

Cottage Lake sits at 47.7°N, 122.1°W, 236 ft above sea level, in United States. The nearest listed city is Union Hill-Novelty Hill, 5.0 mi away.

Topography around Cottage Lake

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

Within 2 miles, the terrain around Cottage Lake has only modest variations in elevation — a maximum elevation change of 482 ft around an average of 351 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,627 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,799 ft.

The land around Cottage Lake is covered by trees (91%) within 2 miles, trees (71%) within 10 miles, and trees (74%) within 50 miles.

2 miles
482 ft
10 miles
1,627 ft
50 miles
7,799 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Union Hill-Novelty Hill 5.0 mi · Redmond 5.0 mi · Bothell 6.2 mi · North Creek 6.8 mi · Sammamish 6.8 mi · Inglewood-Finn Hill 7.5 mi · Kirkland 7.5 mi · Kenmore 8.1 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 Cottage Lake (47.7443°, -122.0773°, elevation 236 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).