January weather forecast
Annapolis, MD

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The Chesapeake Bay at dusk, in Annapolis, Maryland, with a distant view of the US Naval Academy chapel dome
The Chesapeake Bay at dusk, in Annapolis, Maryland, with a distant view of the US Naval Academy chapel dome

Weather in January

The year kicks off with typical winter weather in Annapolis. The chilly sensation is in part due to a maximum daytime temperature barely exceeding 40.3°F (4.6°C), along with nighttime lows often dipping just below freezing. This month is marked by an almost constant cloud cover and robust winds. The conditions in January can create slippery roads and necessitate heavier clothing.

Temperature

January, with an average high of 40.3°F (4.6°C) and a low of 29.8°F (-1.2°C), signifies the coldest month of the year in Annapolis.

Humidity

The months with the lowest humidity in Annapolis are January, March, April and November, with an average relative humidity of 72%.

Rainfall

January is the month with the least rainfall. Rain falls for 6 days and accumulates 0.47" (12mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. The month with the most snowfall is January, when snow falls for 2.3 days and typically aggregates up to 0.67" (17mm) of snow.

Ocean temperature

In Annapolis, Maryland, in January, the average water temperature is 46.8°F (8.2°C).
Note: Diving into 46.8°F (8.2°C) when it's under 50°F (10°C) can cause immediate cold shock symptoms, marked by hyperventilation.

Daylight

In January, the average length of the day is 9h and 48min.
On the first day of the month, sunrise is at 7:24 am and sunset at 4:54 pm. On the last day of January, in Annapolis, sunrise is at 7:13 am and sunset at 5:25 pm EST.

Sunshine

The average sunshine in January is 5.3h.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.
Note: The daily high UV index of 2 in January translates into this advice:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
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Frequently asked questions

What time of the year is the coldest in Annapolis?

With average high and low temperatures of 40.3°F (4.6°C) and 29.8°F (-1.2°C) respectively, January is Annapolis's coldest month.

Is it cold in Annapolis during January?

The high-temperature in Annapolis, Maryland, during January is 40.3°F (4.6°C) and the low-temperature is 29.8°F (-1.2°C).

What is the least humid month in Annapolis?

The months with the lowest humidity in Annapolis, Maryland, are January, March, April and November, with an average relative humidity of 72%.

What is the average humidity in January in Annapolis?

The average relative humidity in January in Annapolis is 72%.

What is the driest month in Annapolis?

The month with the least rainfall in Annapolis, Maryland, is January, when the rain falls for 6 days and typically collects 0.47" (12mm) of precipitation.

How much does it rain in Annapolis in January?

In January, in Annapolis, the rain falls for 6 days. Throughout January, 0.47" (12mm) of precipitation is accumulated.

What is the snowiest month in Annapolis?

The month with the most snowfall in Annapolis, Maryland, is January, when snow falls for 2.3 days and typically aggregates up to 0.67" (17mm) of snow.

How many days does it snow in January in Annapolis?

In Annapolis, Maryland, during January, snow falls for 2.3 days and regularly aggregates up to 0.67" (17mm) of snow.

What is the water temperature in January in Annapolis?

In Annapolis, the average seawater temperature in January is 46.8°F (8.2°C). Swimming in 46.8°F (8.2°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the average length of the day in January in Annapolis?

In Annapolis, Maryland, the average day length in January is 9h and 48min.

When are sunrise and sunset in January in Annapolis?

In January, on the first day of the month, sunrise is at 7:24 am and sunset at 4:54 pm. On the last day of the month, in Annapolis, Maryland, sunrise is at 7:13 am and sunset at 5:25 pm EST.

How many hours of sunshine does Annapolis have in January?

In Annapolis, Maryland, the average sunshine duration in January is 5.3h.

When is the lowest UV index in Annapolis?

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Annapolis, Maryland.

How high is the UV index in January in Annapolis?

In January, the average daily maximum UV index in Annapolis, Maryland, is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
46°F 7.8°C
40.3°F 4.6°C
43°F 6.1°C
Average low temperature
36.5°F 2.5°C
29.8°F -1.2°C
32°F 0°C
Average pressure
30.11" 765mmHg
30.1" 765mmHg
30.07" 764mmHg
Average wind speed
9.3mph 15km/h
10mph 16.1km/h
9.9mph 15.9km/h
Average max. wind speed
9.9mph 15.9km/h
10.7mph 17.2km/h
10.6mph 17.1km/h
Average wind speed gusts
15.1mph 24.3km/h
16mph 25.7km/h
16.5mph 26.6km/h
Average humidity
75%
72%
73%
Average rainfall
0.67" 17mm
0.47" 12mm
0.55" 14mm
Average rainfall days
7.4
6
6.4
Average snowfall
0.12" 3mm
0.67" 17mm
0.2" 5mm
Average snowfall days
1.5
2.3
2.5
Average sea temperature
51.7°F 10.9°C
46.7°F 8.2°C
45.1°F 7.3°C
Average daylight
9h 3min
9h 5min
10h 5min
Average sunshine
5h 1min
5h 2min
5h 0min
Average sunshine days
21.5
23
19.2
Average UV index
2
2
2
Average cloud cover
44%
43%
45%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Annapolis, MD

Average temperature in January - Annapolis, MD
  • Average high temperature in January: 40.3°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (40.3°F).

  • Average low temperature in January: 29.8°F

The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).

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Average pressure in January
Annapolis, MD

Average pressure in January - Annapolis, MD
  • Average pressure in January: 30.1"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in January
Annapolis, MD

Average wind speed in January - Annapolis, MD
  • Average wind speed in January: 10mph

The windiest month (with the highest average wind speed) is January (10mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

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Average humidity in January
Annapolis, MD

Average humidity in January - Annapolis, MD
  • Average humidity in January: 72%

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, March, April and November (72%).

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Average rainfall in January
Annapolis, MD

Average rainfall in January - Annapolis, MD
  • Average rainfall in January: 0.47"

The wettest month (with the highest rainfall) is August (1.69").
The driest month (with the least rainfall) is January (0.47").

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Average rainfall days in January
Annapolis, MD

Average rainfall days in January - Annapolis, MD
  • Average rainfall days in January: 6 days

The months with the highest number of rainy days are July and August (14.3 days).
The month with the least rainy days is November (5.3 days).

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Average snowfall in January
Annapolis, MD

Average snowfall in January - Annapolis, MD
  • Average snowfall in January: 0.67"

The month with the highest snowfall is January (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in January
Annapolis, MD

Average snowfall days in January - Annapolis, MD
  • Average snowfall days in January: 2.3 days

The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in January
Annapolis, MD

Average sea temperature in January - Annapolis, MD
  • Average sea temperature in January: 46.7°F

The best month for swimming (with the highest average sea temperature) is August (77.8°F).
The coldest month (with the lowest average sea temperature) is February (45.1°F).

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Average daylight in January /
Average sunshine in January
Annapolis, MD

Average daylight in January / Average sunshine in January - Annapolis, MD
  • Average daylight in January: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in January: 5h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

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Average sunshine days in January
Annapolis, MD

Average sunshine days in January - Annapolis, MD
  • Average sunshine days in January: 23 days

The month with the most sunshine days is November (23.4 days).
The month with the least sunshine days is August (13.8 days).

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Average UV index in January
Annapolis, MD

Average UV index in January - Annapolis, MD
  • Average UV index in January: 2

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

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Average cloud cover in January
Annapolis, MD

Average cloud cover in January - Annapolis, MD
  • Average cloud cover in January: 43

The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).

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Average visibility in January
Annapolis, MD

Average visibility in January - Annapolis, MD
  • Average visibility in January: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Annapolis, Maryland, USA

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