January weather forecast and climate
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
January, the same as December, is another cold winter month in Annapolis, Maryland, with temperature in the range of an average high of 40.3°F (4.6°C) and an average low of 29.8°F (-1.2°C).

Temperature

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).

Humidity

Months with the lowest humidity in Annapolis 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 in Annapolis are January through March, November and December. 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, the average water temperature is 46.8°F (8.2°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

The average length of the day in January is 9.8h.

Sunshine

In Annapolis, the average sunshine is 5.3h.

UV index

Months with the lowest UV index in Annapolis are January, February and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to the UV radiation for average individuals.
Note: In January, the average maximum UV index of 2 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the coldest month in Annapolis?

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 in Annapolis.

What is the temperature in January in Annapolis?

In Annapolis, Maryland, in January, the average high-temperature is 40.3°F (4.6°C), and the average low-temperature is 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 is 72%.

How much does it rain in Annapolis in January?

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

What is the driest month in Annapolis?

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

How many days does it snow in January in Annapolis?

In Annapolis, Maryland, in January, during 2.3 snowfall days, 0.67" (17mm) of snow is typically accumulated.

What is the snowiest month in Annapolis?

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.

What is the water temperature 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 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 January, the average length of the day in Annapolis, Maryland, is 9.8h.

How long on average sun shines in January in Annapolis?

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

What is the month with 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.

What is the UV index reading in January in Annapolis?

In January, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to the UV radiation.
Average temperature in January - Annapolis, MD
  • Average high temperature in January: 4.6°C

The warmest month (with the highest average high temperature) is July (29.3°C).
The month with the lowest average high temperature is January (4.6°C).

  • Average low temperature in January: -1.2°C

The month with the highest average low temperature is July (22.2°C).
The coldest month (with the lowest average low temperature) is January (-1.2°C).

Average pressure in January - Annapolis, MD
  • Average pressure in January: 1019.4mbar

The month with the highest atmospheric pressure is November (1020.4mbar).
The month with the lowest atmospheric pressure is June (1014mbar).

Average wind speed in January - Annapolis, MD
  • Average wind speed in January: 16.1km/h

The windiest month (with the highest average wind speed) is January (16.1km/h).
The calmest months (with the lowest average wind speed) are July and August (10.6km/h).

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

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

Average rainfall in January - Annapolis, MD
  • Average rainfall in January: 12mm

The wettest month (with the highest rainfall) is August (43mm).
The driest month (with the least rainfall) is January (12mm).

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

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).

Average snowfall in January - Annapolis, MD
  • Average snowfall in January: 17mm

The month with the highest snowfall is January (17mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

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).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in January - Annapolis, MD
  • Average sea temperature in January: 8.2°C

The best month for swimming (with the highest average sea temperature) is August (25.4°C).
The coldest month (with the lowest average sea temperature) is February (7.3°C).

Average daylight in January / Average sunshine in January - Annapolis, MD
  • Average daylight in January: 9.8h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in January: 5.3h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 5h).

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).

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

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

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

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).

Average visibility in January - Annapolis, MD
  • Average visibility in January: 9km

Months with the highest visibility are February, April, June, July, August, October and November (10km).
Months with the lowest visibility are January, March, May, September and December (9km).