Muskego weather in January

In January, Muskego sees average daytime highs of 28°F and overnight lows near 15°F, with 1.8 in of precipitation across 8.3 wet days and about 9.2 hours of daylight. It is the 12th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°F through the month. The sky is clear or mostly clear about 22% of the time in January, and the air most often feels dry.

Daylight stretches from about 8 h 54 min at the start of January to 9 h 36 min by month's end. Set against the rest of the year, January is Muskego's 12th-clearest and 3rd-windiest month. For the whole year in context, see Muskego's year-round climate.

Daytime high
28°
12th warmest
Overnight low
15°
1st coldest
Precipitation
1.8 in
8.3 wet days
Daylight
9 h 12 min
7:27 AM – 4:37 PM
Cloud cover
70%
12th clearest
Wind
9 mph
3rd windiest
Solar energy
1.86 kWh/m²
Travel score
0.0
out of 10

Muskego is third-class city in Waukesha County, Wisconsin, United States.

Density
266/km²
people per km²
Founded
1964

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 28°F through the month.

A typical January day in Muskego reaches about 28°F in the afternoon and slips back to 15°F overnight — a 13°F spread between the day's warmth and the night's chill. On most days the high lands between 13°F and 41°F. Set against its neighbours, January runs about 5°F cooler than December and about 4°F cooler than February.

20°40°151015202531
Avg high (°F)Avg low (°F)
13018
23017
33017
43017
53017
62916
72916
82916
92916
102915
112915
122815
132815
142815
152815
162814
172814
182814
192814
202814
212814
222814
232814
242814
252814
262814
272814
282815
292815
302815
312915

How January really feels in Muskego

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
31 feel bitter (≤ 14°F)

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

Muskego weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan28° / 15°1.88.36.89.20.0
Feb32° / 18°1.775.610.20.0
Mar43° / 28°2.39.34.111.60.8
Apr55° / 38°4.012.11.713.13.4
May67° / 49°3.811.7014.45.8
Jun77° / 59°3.811.2015.16.5
Jul81° / 64°3.410.1014.86.5
Aug79° / 62°3.610.3013.86.7
Sep72° / 54°3.08.7012.36.9
Oct59° / 43°2.98.90.310.84.7
Nov45° / 32°2.28.11.99.51.1
Dec33° / 21°2.07.85.18.90.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in January, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 11% of January, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13169
23169
33169
43169
53169
63070
73070
83070
93169
103070
113169
123268
133268
143268
153268
163367
173367
183466
193466
203466
213367
223466
233466
243466
253466
263466
273466
283466
293565
303565
313565

Chance of precipitation in January

Any precipitationSnow

Muskego gets around 1.8 in of rain and snow over 8.3 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 27% and peaks near 29% on the wettest days, and about 7 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
12518
22618
32619
42719
52820
62821
72921
82922
92922
102922
112922
122922
132922
142923
152823
162823
172823
182723
192723
202622
212522
222522
232522
242422
252422
262422
272422
282422
292422
302422
312422

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 9 mph in January.

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

051015151015202531
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 8 h 54 min at the start of January to 9 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over January. Sunrise moves from 7:29 AM to 7:17 AM, and sunset from 4:22 PM to 4:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.97:294:22
28.97:294:23
38.97:294:24
48.97:294:25
58.97:294:26
69.07:294:27
79.07:294:28
89.07:294:28
99.07:294:29
109.07:294:30
119.07:294:31
129.17:284:32
139.17:284:34
149.17:284:35
159.17:274:36
169.27:274:37
179.27:264:38
189.27:264:39
199.27:254:40
209.37:254:41
219.37:244:43
229.37:244:44
239.47:234:45
249.47:224:46
259.47:224:48
269.57:214:49
279.57:204:50
289.57:194:51
299.67:184:53
309.67:184:54
319.67:174:55

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.86 kWh/m².

For context, solar energy here swings from a low near 1.55 kWh/m² to a high of 6.36 kWh/m² in June across the year — January's 1.86 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
11.6Dim
21.6Dim
31.6Dim
41.6Dim
51.6Dim
61.6Dim
71.7Dim
81.7Dim
91.7Dim
101.7Dim
111.7Dim
121.8Dim
131.8Dim
141.8Dim
151.8Dim
161.9Dim
171.9Dim
181.9Dim
191.9Dim
202.0Dim
212.0Dim
222.0Moderate
232.0Moderate
242.1Moderate
252.1Moderate
262.1Moderate
272.2Moderate
282.2Moderate
292.2Moderate
302.3Moderate
312.3Moderate
Planning a trip in January

Is January a good time to visit Muskego?

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

0.0
Sightseeing
10th-best month of the year
0.0
Beach & pool
8th-best month of the year

January is a weaker month for outdoor sightseeing in Muskego.

What to pack for Muskego in January

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

In January, Muskego sees daytime highs around 28°F and nights near 15°F. Pack a warm layer and a heavy coat. Worth having: rain gear. About 8 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Muskego in January

The nearest coast averages about 38°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 14 mi away) is warmest in August at about 70°F and coldest in March near 36°F.

It's comfortable for a long swim from Jul 24 to Sep 2 — about 1.3 months when the water holds above 68°F.

30°40°50°60°70°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar36Bracing
Apr38Bracing
May43Bracing
Jun55Bracing
Jul67Cool
Aug70Refreshing
Sep66Cool
Oct56Bracing
Nov47Bracing
Dec41Bracing

UV index in Muskego 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 Muskego peaks around June 22 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 highHighModerateLowJun 22UV 9Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Muskego 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 Muskego is worst in July — around 17 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJul 1616 µg/m³Oct 239 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb14Moderate
Mar15Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug15Moderate
Sep12Moderate
Oct9Good
Nov9Good
Dec10Good
Location & terrain

Where is Muskego?

Muskego sits at 42.9°N, 88.1°W, 801 ft above sea level, in United States. The nearest listed city is New Berlin, 5.0 mi away.

Topography around Muskego

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

Within 2 miles, the terrain around Muskego has only modest variations in elevation — a maximum elevation change of 246 ft around an average of 820 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 627 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 840 ft.

The land around Muskego is covered by trees (39%) and grassland (31%) within 2 miles, trees (40%) and grassland (26%) within 10 miles, and water (32%), cropland (29%) and trees (21%) within 50 miles.

2 miles
246 ft
10 miles
627 ft
50 miles
840 ft
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: New Berlin 5.0 mi · Franklin 5.0 mi · Greenfield 7.5 mi · Waukesha 8.7 mi · West Allis 9.9 mi · Brookfield 11 mi · Wauwatosa 12 mi · Caledonia 13 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 Muskego (42.9059°, -88.139°, elevation 801 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. 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).