Annapolis
Maryland, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Annapolis, MD

A view of Chesapeake Bay at dusk, in Annapolis, Maryland, with a distant view of the US Naval Academy chapel dome
A view of Chesapeake Bay at dusk, in Annapolis, Maryland, with a distant view of the US Naval Academy chapel dome
January, like December, in Annapolis, Maryland, is a wintry winter month, with average temperature ranging between max 42.6°F (5.9°C) and min 29.1°F (-1.6°C).

Temperature

January is the coldest month, with an average high-temperature of 42.6°F (5.9°C) and an average low-temperature of 29.1°F (-1.6°C).

Rainfall

In Annapolis, it is raining for 9.4 days, with typically 3.3" (84.3mm) of accumulated precipitation. Throughout the year, in Annapolis, there are 115.1 rainfall days, and 47.3" (1200.7mm) of precipitation is accumulated.

Ocean temperature

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 dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In January, the average length of the day in Annapolis is 9.8h.

Sunshine

Months with the least sunshine are January, November and December, with an average of 5h of sunshine.

UV index

Months with the lowest UV index in Annapolis are January and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from the exposure to the Sun's UV radiation for average individuals.
In January, the average maximum UV index of 2 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the coldest month in Annapolis?

January is the coldest month in Annapolis, with an average high-temperature of 42.6°F (5.9°C) and an average low-temperature of 29.1°F (-1.6°C).

What is the temperature in January in Annapolis?

In January, the average high-temperature is 42.6°F (5.9°C), and the average low-temperature is 29.1°F (-1.6°C).

How many days does it rain in January in Annapolis?

In Annapolis, Maryland, in January, during 9.4 rainfall days, 3.3" (84.3mm) of precipitation is typically accumulated.

What is the water temperature in January in Annapolis?

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

How many hours of daylight does Annapolis have in January?

In January, the average length of the day in Annapolis is 9.8h.

What is the month with the least sunshine in Annapolis?

Months with the least sunshine are January, November and December, with an average of 5h of sunshine.

How long on average sun shines in January in Annapolis?

In Annapolis, the average sunshine in January is 5h.

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

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

How high is the UV index 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 the exposure to the Sun's UV radiation.
Average temperature in January - Annapolis, MD
  • Average high temperature in January: 42.7°F

The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (42.7°F).

  • Average low temperature in January: 29.1°F

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).

Average rainfall in January - Annapolis, MD
  • Average rainfall in January: 3.3"

The wettest month (with the highest rainfall) is September (4.8").
The driest month (with the lowest rainfall) is February (2.9").

Average rainfall days in January - Annapolis, MD
  • Average rainfall days in January: 9.4 days

Months with the highest number of rainy days are March and April (11.2 days).
Months with the lowest number of rainy days are September and October (7.8 days).

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).

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 shortest days is December (Average daylight: 9.5h).

  • Average sunshine in January: 5h

Months with most sunshine are June, July and August (Average sunshine: 9h).
Months with least sunshine are January, November and December (Average sunshine: 5).

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

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 2).