Saint Charles weather in January

In January, Saint Charles sees average daytime highs of 44°F and overnight lows near 31°F, with 3.0 in of precipitation across 8.7 wet days and about 9.6 hours of daylight. It is the 12th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 44°F through the month. The sky is clear or mostly clear about 34% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 18 min at the start of January to 10 hours by month's end. Set against the rest of the year, January is Saint Charles's 6th-clearest and 3rd-windiest month. For the whole year in context, see Saint Charles's year-round climate.

Daytime high
44°
12th warmest
Overnight low
31°
1st coldest
Precipitation
3.0 in
8.7 wet days
Daylight
9 h 36 min
7:30 AM – 5:04 PM
Cloud cover
58%
6th clearest
Wind
7 mph
3rd windiest
Solar energy
2.31 kWh/m²
Travel score
0.7
out of 10

Saint Charles is census designated place in Charles County, Maryland, United States.

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 44°F through the month.

A typical January day in Saint Charles reaches about 44°F in the afternoon and slips back to 31°F overnight — a 13°F spread between the day's warmth and the night's chill. On most days the high lands between 31°F and 57°F. Set against its neighbours, January runs about 4°F cooler than December and about 3°F cooler than February.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
14533
24533
34533
44533
54533
64532
74532
84532
94432
104432
114431
124431
134431
144431
154331
164330
174330
184330
194330
204330
214330
224330
234329
244329
254329
264329
274329
284330
294430
304430
314430

How January really feels in Saint Charles

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.

Saint Charles 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
Jan44° / 31°3.08.72.79.60.7
Feb47° / 32°2.88.42.210.51.4
Mar55° / 39°3.910.11.511.73.5
Apr66° / 50°3.39.40136.0
May74° / 59°3.410.4014.16.7
Jun83° / 68°3.510.9014.65.7
Jul87° / 73°3.812014.44.6
Aug85° / 71°3.710.2013.55.4
Sep78° / 64°4.19.2012.36.9
Oct67° / 53°3.47.70116.6
Nov56° / 42°2.97.40.19.94.2
Dec48° / 35°3.38.71.29.41.8

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 16% of January, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25149
35050
45050
55050
65050
74951
85050
94951
104951
114951
124951
134951
144951
154951
164951
174951
184951
194951
204951
215050
225050
235050
245050
255050
264951
275050
285050
295050
304951
314951

Chance of precipitation in January

Any precipitationSnow

Saint Charles gets around 3.0 in of rain and snow over 8.7 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 28% and peaks near 30% on the wettest days, and about 3 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1275
2275
3276
4276
5286
6286
7287
8297
9297
10298
11308
12308
13308
14309
15309
16309
17299
18299
19299
20299
212810
222810
232810
242810
252710
262710
272710
282710
292710
302710
31279

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19811
29901
39901
49901
59901
69901
79901
89811
99811
109811
119811
129811
139811
149910
159910
169910
179910
189910
199910
209910
2110000
2210000
2310000
2410000
2510000
2610000
2710000
2810000
2910000
3010000
3110000

Wind in January

Winds average 7 mph in January.

Across January, daily wind ranges from about 7 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 9 h 18 min at the start of January to 10 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over January. Sunrise moves from 7:31 AM to 7:22 AM, and sunset from 4:51 PM to 5:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.37:314:51
29.47:314:52
39.47:314:53
49.47:314:54
59.47:314:54
69.47:314:55
79.47:314:56
89.47:314:57
99.47:314:58
109.57:314:59
119.57:315:00
129.57:315:01
139.57:305:02
149.57:305:03
159.67:305:03
169.67:305:04
179.67:295:05
189.67:295:07
199.67:295:08
209.77:285:09
219.77:285:10
229.77:275:11
239.87:275:12
249.87:265:13
259.87:265:14
269.87:255:15
279.97:245:16
289.97:245:17
299.97:235:18
3010.07:225:19
3110.07:225:21

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.31 kWh/m².

For context, solar energy here swings from a low near 2 kWh/m² to a high of 6.15 kWh/m² in June across the year — January's 2.31 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.1Moderate
22.1Moderate
32.1Moderate
42.1Moderate
52.1Moderate
62.1Moderate
72.1Moderate
82.1Moderate
92.1Moderate
102.2Moderate
112.2Moderate
122.2Moderate
132.2Moderate
142.2Moderate
152.3Moderate
162.3Moderate
172.3Moderate
182.3Moderate
192.4Moderate
202.4Moderate
212.4Moderate
222.4Moderate
232.5Moderate
242.5Moderate
252.5Moderate
262.6Moderate
272.6Moderate
282.6Moderate
292.7Moderate
302.7Moderate
312.7Moderate
Planning a trip in January

Hazard calendar for Saint Charles

In seasonPeak

None of Saint Charles's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Saint Charles sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit Saint Charles?

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

0.7
Sightseeing
12th-best month of the year
0.0
Beach & pool
10th-best month of the year

January is a weaker month for outdoor sightseeing in Saint Charles.

What to pack for Saint Charles in January

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

In January, Saint Charles sees daytime highs around 44°F and nights near 31°F. Pack a warm layer. Worth having: a heavy coat and rain gear. About 9 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Saint Charles 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 30 mi away) is warmest in August at about 78°F and coldest in February near 37°F.

It's comfortable for a long swim from Jun 16 to Oct 6 — about 3.7 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan38Bracing
Feb37Bracing
Mar40Bracing
Apr47Bracing
May57Bracing
Jun68Refreshing
Jul76Warm
Aug78Warm
Sep74Refreshing
Oct65Cool
Nov54Bracing
Dec45Bracing

UV index in Saint Charles 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 Saint Charles peaks around July 11 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 11UV 9Dec 19UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug7High
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Saint Charles 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 Saint Charles is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1416 µg/m³Nov 187 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar12Good
Apr13Moderate
May14Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov7Good
Dec8Good
Location & terrain

Where is Saint Charles?

Saint Charles sits at 38.6°N, 76.9°W, 200 ft above sea level, in United States. The nearest listed city is St. Charles, 0.6 mi away.

Topography around Saint Charles

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

Within 2 miles, the terrain around Saint Charles has only modest variations in elevation — a maximum elevation change of 98 ft around an average of 213 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 312 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,539 ft.

The land around Saint Charles is covered by trees (61%) and artificial surfaces (24%) within 2 miles, trees (77%) within 10 miles, and trees (60%) and water (20%) within 50 miles.

2 miles
98 ft
10 miles
312 ft
50 miles
1,539 ft
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: St. Charles 0.6 mi · Waldorf 1.2 mi · Fort Washington 8.7 mi · Fort Hunt 11 mi · Clinton 11 mi · Hybla Valley 12 mi · Woodlawn 13 mi · Oxon Hill-Glassmanor 14 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 Saint Charles (38.6032°, -76.9386°, elevation 200 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).