Annapolis weather in January

In January, Annapolis sees average daytime highs of 41°F and overnight lows near 31°F, with 3.5 in of precipitation across 9 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 41°F through the month. The sky is clear or mostly clear about 33% 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 Annapolis's 7th-clearest and 1st-windiest month. For the whole year in context, see Annapolis's year-round climate.

Daytime high
41°
12th warmest
Overnight low
31°
1st coldest
Precipitation
3.5 in
9 wet days
Daylight
9 h 30 min
7:29 AM – 5:02 PM
Cloud cover
59%
7th clearest
Wind
10 mph
1st windiest
Solar energy
2.23 kWh/m²
Travel score
0.1
out of 10

Annapolis is capital city of the U.S. state of Maryland and seat of Anne Arundel County.

Density
1,944/km²
people per km²
Founded
1649

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 41°F through the month.

A typical January day in Annapolis reaches about 41°F in the afternoon and slips back to 31°F overnight — a 10°F spread between the day's warmth and the night's chill. On most days the high lands between 30°F and 52°F. Set against its neighbours, January runs about 5°F cooler than December and about 2°F cooler than February.

20°30°40°50°60°151015202531
Avg high (°F)Avg low (°F)
14333
24333
34333
44333
54333
64233
74232
84232
94232
104232
114232
124231
134131
144131
154131
164131
174130
184130
194030
204030
214030
224030
234030
244030
254030
264030
274030
284130
294130
304130
314130

How January really feels in Annapolis

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.

Annapolis 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
Jan41° / 31°3.592.79.60.1
Feb43° / 32°3.392.810.50.6
Mar51° / 38°4.410.91.611.72.4
Apr61° / 49°3.710.20.1135.1
May70° / 58°3.810.8014.16.4
Jun79° / 68°3.610.8014.76.4
Jul84° / 73°4.211.7014.55.4
Aug82° / 72°4.010.2013.56.1
Sep76° / 66°4.69.2012.37.0
Oct66° / 55°3.98.20116.3
Nov55° / 44°3.38.10.19.93.7
Dec46° / 36°4.19.51.39.31.2

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% 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
34951
45050
55050
65050
75050
84951
94951
104951
114951
124951
134951
144852
154852
164852
174852
184852
194852
204852
214852
224951
234951
244951
254951
264951
274951
284951
294951
304852
314852

Chance of precipitation in January

Any precipitationSnow

Annapolis gets around 3.5 in of rain and snow over 9 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 29% and peaks near 31% on the wettest days, and about 3 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1296
2306
3306
4306
5307
6317
7317
8317
9317
10318
11318
12318
13319
14319
15319
16309
17309
18299
19299
20289
212810
222810
232710
242710
252710
262710
272710
282710
292710
302710
312710

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 10 mph in January, the windiest month of the year.

Across January, daily wind ranges from about 9 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
610light breeze
710light breeze
810light breeze
910light breeze
1010light breeze
1110light breeze
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze
319light breeze

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 7:30 AM to 7:21 AM, and sunset from 4:48 PM to 5:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.37:304:48
29.37:304:49
39.37:304:50
49.37:304:51
59.47:304:52
69.47:304:52
79.47:304:53
89.47:304:54
99.47:304:55
109.47:304:56
119.47:304:57
129.57:304:58
139.57:304:59
149.57:295:00
159.57:295:01
169.57:295:02
179.67:285:03
189.67:285:04
199.67:285:05
209.67:275:06
219.77:275:07
229.77:265:08
239.77:265:09
249.77:255:10
259.87:255:11
269.87:245:12
279.87:235:13
289.97:235:15
299.97:225:16
309.97:215:17
3110.07:215:18

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.23 kWh/m².

For context, solar energy here swings from a low near 1.94 kWh/m² to a high of 6.1 kWh/m² in June across the year — January's 2.23 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.0Dim
22.0Moderate
32.0Moderate
42.0Moderate
52.0Moderate
62.0Moderate
72.0Moderate
82.1Moderate
92.1Moderate
102.1Moderate
112.1Moderate
122.1Moderate
132.1Moderate
142.2Moderate
152.2Moderate
162.2Moderate
172.2Moderate
182.3Moderate
192.3Moderate
202.3Moderate
212.3Moderate
222.4Moderate
232.4Moderate
242.4Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.6Moderate
292.6Moderate
302.6Moderate
312.7Moderate
Planning a trip in January

Hazard calendar for Annapolis

In seasonPeak

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

Annapolis 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 Annapolis?

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

0.1
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 Annapolis.

What to pack for Annapolis in January

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

In January, Annapolis sees daytime highs around 41°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 Annapolis 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 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
May58Bracing
Jun68Refreshing
Jul76Warm
Aug78Warm
Sep74Refreshing
Oct65Cool
Nov54Bracing
Dec45Bracing

UV index in Annapolis 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 Annapolis 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 Annapolis 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 Annapolis is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1216 µg/m³Nov 118 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar13Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep12Good
Oct9Good
Nov8Good
Dec10Good
Location & terrain

Where is Annapolis?

Annapolis sits at 39.0°N, 76.5°W, 39 ft above sea level, in United States. The nearest listed city is Parole, 3.1 mi away.

Topography around Annapolis

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

Within 2 miles, the terrain around Annapolis has only modest variations in elevation — a maximum elevation change of 187 ft around an average of 39 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 322 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,227 ft.

The land around Annapolis is covered by trees (42%), water (29%) and artificial surfaces (22%) within 2 miles, trees (45%) and water (43%) within 10 miles, and trees (53%) within 50 miles.

2 miles
187 ft
10 miles
322 ft
50 miles
1,227 ft
treesgrasslandcroplandartificial surfaceswaterwetland
January weather nearby: Parole 3.1 mi · Arnold 3.7 mi · Severna Park 6.8 mi · Lake Shore 8.7 mi · Pasadena 11 mi · Crofton 11 mi · Green Haven 12 mi · South Gate 12 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 Annapolis (38.9786°, -76.4918°, elevation 39 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).