Romulus weather in January

In January, Romulus sees average daytime highs of 32°F and overnight lows near 19°F, with 2.4 in of precipitation across 9.6 wet days and about 9.3 hours of daylight. It is the 12th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°F through the month. The sky is clear or mostly clear about 12% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 hours at the start of January to 9 h 42 min by month's end. Set against the rest of the year, January is Romulus's 12th-clearest and 1st-windiest month. For the whole year in context, see Romulus's year-round climate.

Daytime high
32°
12th warmest
Overnight low
19°
1st coldest
Precipitation
2.4 in
9.6 wet days
Daylight
9 h 12 min
8:06 AM – 5:20 PM
Cloud cover
78%
12th clearest
Wind
9 mph
1st windiest
Solar energy
1.8 kWh/m²
Travel score
0.0
out of 10

Romulus is city in Wayne County, Michigan, United States.

Density
251/km²
people per km²
Founded
1826

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 32°F through the month.

A typical January day in Romulus reaches about 32°F in the afternoon and slips back to 19°F overnight — a 13°F spread between the day's warmth and the night's chill. On most days the high lands between 18°F and 46°F. Set against its neighbours, January runs about 5°F cooler than December and about 3°F cooler than February.

20°40°151015202531
Avg high (°F)Avg low (°F)
13422
23322
33322
43321
53321
63321
73321
83320
93220
103220
113220
123219
133219
143119
153119
163119
173118
183118
193118
203118
213118
223118
233118
243118
253118
263118
273118
283118
293218
303218
313218

How January really feels in Romulus

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.

Romulus weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan32° / 19°2.49.65.89.30.0
Feb35° / 20°2.085.410.30.0
Mar45° / 28°2.59.83.611.61.0
Apr57° / 39°3.611.71.213.13.9
May69° / 50°3.812.7014.45.9
Jun78° / 60°3.610.70156.5
Jul82° / 64°3.311.2014.86.1
Aug80° / 62°3.210.2013.76.6
Sep73° / 54°2.78.8012.37.0
Oct61° / 43°2.690.210.85.0
Nov47° / 34°2.68.91.69.61.6
Dec37° / 25°2.38.84.590.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in January, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 10% of January, with mostly cloudy or overcast conditions the remaining 78%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12080
22179
32080
42080
52080
62080
72080
82179
92080
102080
112080
122179
132179
142179
152278
162179
172179
182179
192278
202179
212179
222278
232278
242377
252476
262476
272476
282575
292575
302674
312674

Chance of precipitation in January

Any precipitationSnow

Romulus gets around 2.4 in of rain and snow over 9.6 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 31% and peaks near 34% on the wettest days, and about 6 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
13015
23116
33116
43217
53317
63418
73418
83419
93419
103419
113419
123420
133420
143320
153319
163219
173219
183119
193019
203019
212919
222919
232819
242819
252819
262719
272719
282719
292719
302719
312719

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, the windiest month of the year.

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 9 hours at the start of January to 9 h 42 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 8:08 AM to 7:56 AM, and sunset from 5:06 PM to 5:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.08:085:06
29.08:085:06
39.08:085:07
49.08:085:08
59.08:085:09
69.08:085:10
79.08:085:11
89.18:085:12
99.18:085:13
109.18:085:14
119.18:075:15
129.18:075:16
139.28:075:17
149.28:065:18
159.28:065:19
169.28:065:20
179.38:055:21
189.38:055:22
199.38:045:23
209.38:045:25
219.48:035:26
229.48:035:27
239.48:025:28
249.58:015:29
259.58:015:30
269.58:005:32
279.67:595:33
289.67:585:34
299.67:585:35
309.77:575:37
319.77:565:38

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.8 kWh/m².

For context, solar energy here swings from a low near 1.45 kWh/m² to a high of 6.36 kWh/m² in June across the year — January's 1.8 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
11.5Dim
21.5Dim
31.5Dim
41.5Dim
51.6Dim
61.6Dim
71.6Dim
81.6Dim
91.6Dim
101.6Dim
111.7Dim
121.7Dim
131.7Dim
141.7Dim
151.8Dim
161.8Dim
171.8Dim
181.9Dim
191.9Dim
201.9Dim
211.9Dim
222.0Dim
232.0Dim
242.0Moderate
252.1Moderate
262.1Moderate
272.1Moderate
282.2Moderate
292.2Moderate
302.2Moderate
312.3Moderate
Planning a trip in January

Is January a good time to visit Romulus?

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
9th-best month of the year

January is a weaker month for outdoor sightseeing in Romulus.

What to pack for Romulus in January

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

In January, Romulus sees daytime highs around 32°F and nights near 19°F. Pack a warm layer and a heavy coat. Worth having: rain gear. About 10 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Romulus in January

The nearest coast averages about 34°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 24 mi away) is warmest in August at about 75°F and coldest in February near 33°F.

It's comfortable for a long swim from Jun 20 to Sep 20 — about 3.1 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan34Bracing
Feb33Bracing
Mar36Bracing
Apr44Bracing
May56Bracing
Jun67Cool
Jul75Refreshing
Aug75Warm
Sep70Refreshing
Oct58Bracing
Nov46Bracing
Dec38Bracing

UV index in Romulus in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Romulus peaks around June 20 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 20UV 9Dec 20UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr6High
May7High
Jun9Very high
Jul8Very high
Aug7High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Romulus 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 Romulus is worst in July — around 16 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1216 µg/m³Oct 239 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar14Moderate
Apr14Moderate
May15Moderate
Jun16Moderate
Jul16Moderate
Aug15Moderate
Sep12Moderate
Oct9Good
Nov9Good
Dec10Good
Location & terrain

Where is Romulus?

Romulus sits at 42.2°N, 83.4°W, 659 ft above sea level, in United States. The nearest listed city is Wayne, 4.3 mi away.

Topography around Romulus

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

Within 2 miles, the terrain around Romulus has only modest variations in elevation — a maximum elevation change of 125 ft around an average of 666 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 305 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 915 ft.

The land around Romulus is covered by trees (44%), grassland (26%) and artificial surfaces (24%) within 2 miles, trees (46%), artificial surfaces (25%) and grassland (22%) within 10 miles, and trees (32%), cropland (25%) and water (21%) within 50 miles.

2 miles
125 ft
10 miles
305 ft
50 miles
915 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
January weather nearby: Wayne 4.3 mi · Taylor 6.8 mi · Inkster 6.8 mi · Westland 6.8 mi · Canton 7.5 mi · Garden City 8.1 mi · Allen Park 9.9 mi · Dearborn Heights 9.9 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 Romulus (42.2223°, -83.3966°, elevation 659 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).