January weather forecast
Annapolis, MD

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

January, like December, in Annapolis, Maryland, is another cold winter month, with an average temperature ranging between max 40.3°F (4.6°C) and min 29.8°F (-1.2°C).

Temperature

With an average high-temperature of 40.3°F (4.6°C) and an average low-temperature of 29.8°F (-1.2°C), January is the coldest month.

Humidity

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

Rainfall

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

Snowfall

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

Ocean temperature

In January, the average ocean temperature in Annapolis is 46.8°F (8.2°C).
Note: 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.

Daylight

In January, the average length of the day is 9h and 48min.
On the first day of January, sunrise is at 7:24 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 5:25 pm EST.

Sunshine

The average sunshine in January in Annapolis is 5.3h.

UV index

The months with the lowest UV index in Annapolis, Maryland, are January, February and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The average daily UV index of 2 in January transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Annapolis?

The coldest month is January, with an average high-temperature of 40.3°F (4.6°C) and an average low-temperature of 29.8°F (-1.2°C).

What are the least humid months in Annapolis?

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

What is the average humidity in January in Annapolis?

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

What is the driest month in Annapolis?

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

How many days does it rain in January in Annapolis?

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

When does it snow the most 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, in January, snow falls for 2.3 days, with typically accumulated 0.67" (17mm) of snow.

How cold is the water in January in Annapolis?

In Annapolis, Maryland, in January, the average water temperature is 46.8°F (8.2°C). Swimming in 46.8°F (8.2°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

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

The average day length in January in Annapolis is 9h and 48min.

When are sunrise and sunset in January in Annapolis?

On the first day of January in Annapolis, sunrise is at 7:24 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 5:25 pm EST.

How long on average sun shines in January in Annapolis?

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

What are the months with the lowest UV index in Annapolis?

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

How high is the UV index in January in Annapolis?

In Annapolis, Maryland, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a low health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

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 48min

The month with the longest days is June (Average daylight: 14h and 52min).
The month with the shortest days is December (Average daylight: 9h and 29min).

  • Average sunshine in January: 5h and 18min

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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