Chatham weather in January

In January, Chatham sees average daytime highs of 31°F and overnight lows near 21°F, with 3.3 in of precipitation across 10 wet days and about 9.3 hours of daylight. It is the 12th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°F through the month. The sky is clear or mostly clear about 17% 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 Chatham's 12th-clearest and 3rd-windiest month. For the whole year in context, see Chatham's year-round climate.

Daytime high
31°
12th warmest
Overnight low
21°
1st coldest
Precipitation
3.3 in
10 wet days
Daylight
9 h 18 min
7:21 AM – 4:38 PM
Cloud cover
75%
12th clearest
Wind
14 mph
3rd windiest
Solar energy
1.95 kWh/m²
Travel score
0.0
out of 10

Chatham is neighborhood in Chicago, Illinois, USA.

Density
4,082/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

Day-to-day highs hold fairly steady near 31°F through the month.

A typical January day in Chatham reaches about 31°F in the afternoon and slips back to 21°F overnight — a 9°F spread between the day's warmth and the night's chill. On most days the high lands between 19°F and 41°F. Set against its neighbours, January runs about 6°F cooler than December and about 1°F cooler than February.

20°40°151015202531
Avg high (°F)Avg low (°F)
13324
23324
33224
43224
53223
63223
73223
83122
93122
103122
113122
123121
133121
143021
153021
163020
173020
183020
193020
203020
213020
223020
233020
243020
253020
263020
273020
283020
293020
303020
313020

How January really feels in Chatham

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.

Chatham weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan31° / 21°3.3106.49.30.0
Feb32° / 22°2.68.2510.30.0
Mar39° / 30°3.2103.211.70.1
Apr50° / 42°4.912.41.113.12.2
May63° / 54°4.612.1014.35.2
Jun74° / 65°3.911.60156.5
Jul79° / 71°3.411.4014.76.5
Aug78° / 70°3.810.8013.76.8
Sep71° / 63°3.39.1012.36.9
Oct59° / 51°4.110.70.110.94.6
Nov46° / 39°3.810.31.29.61.3
Dec36° / 28°3.210.24.690.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% 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 73%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12575
22575
32575
42476
52476
62377
72377
82476
92476
102476
112575
122674
132674
142674
152773
162872
172872
182872
192872
202872
212872
222971
232971
242971
253070
263070
273070
283169
293169
303169
313169

Chance of precipitation in January

Any precipitationSnow

Chatham gets around 3.3 in of rain and snow over 10 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 32% and peaks near 35% on the wettest days, and about 6 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13317
23318
33418
43419
53519
63519
73520
83520
93520
103521
113421
123421
133421
143421
153322
163322
173322
183222
193222
203122
213122
223022
233021
243021
252921
262921
272921
282921
292921
302821
312820

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 14 mph in January.

Across January, daily wind ranges from about 13 mph on the calmest days to 14 mph at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (mph)Feels
114breezy
214breezy
314breezy
414breezy
514breezy
614breezy
714breezy
814breezy
914breezy
1014breezy
1114breezy
1214breezy
1314breezy
1414breezy
1514breezy
1614breezy
1714breezy
1814breezy
1913breezy
2013breezy
2113breezy
2213breezy
2313breezy
2413breezy
2513breezy
2613breezy
2713breezy
2813breezy
2913breezy
3013breezy
3113breezy

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 7:23 AM to 7:12 AM, and sunset from 4:24 PM to 4:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.07:234:24
29.07:234:25
39.07:234:26
49.17:234:27
59.17:234:27
69.17:234:28
79.17:234:29
89.17:234:30
99.17:234:31
109.27:234:32
119.27:234:33
129.27:224:34
139.27:224:35
149.27:224:36
159.37:224:37
169.37:214:38
179.37:214:39
189.37:204:41
199.47:204:42
209.47:194:43
219.47:194:44
229.47:184:45
239.57:184:46
249.57:174:47
259.57:164:49
269.67:164:50
279.67:154:51
289.67:144:52
299.77:134:53
309.77:124:55
319.77:124:56

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 1.95 kWh/m².

For context, solar energy here swings from a low near 1.57 kWh/m² to a high of 6.61 kWh/m² in June across the year — January's 1.95 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
11.6Dim
21.6Dim
31.6Dim
41.7Dim
51.7Dim
61.7Dim
71.7Dim
81.7Dim
91.8Dim
101.8Dim
111.8Dim
121.8Dim
131.9Dim
141.9Dim
151.9Dim
161.9Dim
172.0Dim
182.0Moderate
192.0Moderate
202.1Moderate
212.1Moderate
222.1Moderate
232.2Moderate
242.2Moderate
252.2Moderate
262.3Moderate
272.3Moderate
282.4Moderate
292.4Moderate
302.4Moderate
312.5Moderate
Planning a trip in January

Is January a good time to visit Chatham?

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 Chatham.

What to pack for Chatham in January

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

In January, Chatham sees daytime highs around 31°F and nights near 21°F. Pack a warm layer and a heavy coat. Worth having: rain gear and a windbreaker. About 10 days see rain.

a warm layera heavy coatrain geara windbreaker

Sea temperature near Chatham 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 9 mi away) is warmest in August at about 73°F and coldest in February near 36°F.

It's comfortable for a long swim from Jul 13 to Sep 15 — about 2.1 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar36Bracing
Apr39Bracing
May45Bracing
Jun57Bracing
Jul70Refreshing
Aug73Refreshing
Sep68Refreshing
Oct58Bracing
Nov49Bracing
Dec42Bracing

UV index in Chatham 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 Chatham peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 23UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May7Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low

Air quality in Chatham 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 Chatham is worst in July — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJul 921 µg/m³Oct 2410 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb15Moderate
Mar18Moderate
Apr19Moderate
May20Moderate
Jun21Moderate
Jul21Moderate
Aug18Moderate
Sep15Moderate
Oct10Good
Nov10Good
Dec11Good
Location & terrain

Where is Chatham?

Chatham sits at 41.7°N, 87.6°W, 591 ft above sea level, in United States. The nearest listed city is Greater Grand Crossing, 1.2 mi away.

Topography around Chatham

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

Within 2 miles, the terrain around Chatham has only modest variations in elevation — a maximum elevation change of 75 ft around an average of 597 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 515 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 741 ft.

The land around Chatham is covered by artificial surfaces (81%) within 2 miles, artificial surfaces (52%) and water (29%) within 10 miles, and water (31%), cropland (26%) and trees (20%) within 50 miles.

2 miles
75 ft
10 miles
515 ft
50 miles
741 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Greater Grand Crossing 1.2 mi · Auburn Gresham 1.9 mi · South Shore 2.5 mi · Woodlawn 2.5 mi · South Chicago 3.1 mi · Englewood 3.1 mi · West Englewood 3.7 mi · Hyde Park 3.7 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 Chatham (41.7411°, -87.6125°, elevation 591 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).