January weather forecast
Chester, MD

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January

Weather in January

January, like December, in Chester, Maryland, is another cold winter month, with an average temperature fluctuating between 40.1°F (4.5°C) and 29.5°F (-1.4°C).

Temperature

In Chester, the lowest temperatures are generally noted in January, averaging a high of 40.1°F (4.5°C) and a low of 29.5°F (-1.4°C).

Humidity

The months with the lowest humidity are January and November, with an average relative humidity of 73%.

Rainfall

In Chester, during January, the rain falls for 9.3 days and regularly aggregates up to 2.05" (52mm) of precipitation. In Chester, during the entire year, the rain falls for 159 days and collects up to 32.36" (822mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall. The month with the most snowfall is January, when snow falls for 4.2 days and typically aggregates up to 1.42" (36mm) of snow.

Ocean temperature

In January, the average ocean temperature is 46.8°F (8.2°C).
Note: If planning to swim in 46.8°F (8.2°C) under 50°F (10°C), wear a protective suit. Neglecting this advice might cause immediate cold shock and troubled breathing. A splash around 55.4°F (13°C) is not much warmer.

Daylight

In Chester, the average length of the day in January is 9h and 48min.
On the first day of the month, sunrise is at 7:23 am and sunset at 4:53 pm. On the last day of January, sunrise is at 7:12 am and sunset at 5:24 pm EST.

Sunshine

In January, the average sunshine is 5.3h.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum daily UV index of 2 during January morphs into the following directions:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest month?
In Chester, January is known for its average lowest temperatures, reaching a high of 40.1°F (4.5°C) and a low of 29.5°F (-1.4°C).
Is it cold during January?
In Chester, 40.1°F (4.5°C) is the average high-temperature and 29.5°F (-1.4°C) is the average low-temperature during January.
What is the least humid month?
The months with the lowest humidity are January and November, with an average relative humidity of 73%.
What is the average humidity in January?
In Chester, the average relative humidity in January is 73%.
How many days does it rain in January?
In January, the rain falls for 9.3 days. Throughout January, 2.05" (52mm) of precipitation is accumulated.
When does it snow the most?
January is the month with the most snowfall. Snow falls for 4.2 days and accumulates 1.42" (36mm) of snow.
How many days does it snow in January?
In Chester, in January, snow falls for 4.2 days, with typically accumulated 1.42" (36mm) of snow.
How cold is the water in January?
In Chester, in January, the average water temperature 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 Chester have in January?
The average day length in January is 9h and 48min.
When is the sunrise / sunset in January?
On the first day of January, sunrise is at 7:23 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 5:24 pm EST.
How long on average sun shines in January?
The average sunshine duration in January is 5.3h.
What are the months with the lowest UV index in Chester?
January and December, with an average maximum UV index of 2, are months with the lowest UV index.
How high is the UV index in January?
The average daily maximum UV index in January is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
46.2°F
40.1°F
43.3°F
Average low temperature
36.3°F
29.5°F
31.5°F
Average pressure
30.11"Hg
30.1"Hg
30.07"Hg
Average wind speed
9.2mph
10mph
10.1mph
Average max. wind speed
10.1mph
10.9mph
10.9mph
Average wind speed gusts
15.4mph
16.5mph
16.8mph
Average humidity
76%
73%
74%
Average rainfall
2.91"
2.05"
2.4"
Average rainfall days
11.4
9.3
10.9
Average snowfall
0.31"
1.42"
0.98"
Average snowfall days
1.7
4.2
3
Average sea temperature
51.7°F
46.7°F
45.1°F
Average daylight
9h 3min
9h 5min
10h 5min
Average sunshine
5h 1min
5h 2min
5h 0min
Average sunshine days
17.4
18.2
14.6
Average UV index
2
2
3
Average cloud cover
45%
43%
45%
Average visibility
6mi
6mi
6mi
Average temperature in January - Chester, MD
Average temperature in January
Chester, MD
  • Average high temperature in January: 40.1°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (40.1°F).

  • Average low temperature in January: 29.5°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 (29.5°F).

Average pressure in January - Chester, MD
Average pressure in January
Chester, 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).

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

The windiest months (with the highest average wind speed) are February and March (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

Average humidity in January - Chester, MD
Average humidity in January
Chester, MD
  • Average humidity in January: 73%

The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January and November (73%).

Average rainfall in January - Chester, MD
Average rainfall in January
Chester, MD
  • Average rainfall in January: 2.05"

The wettest month (with the highest rainfall) is July (3.31").
The driest month (with the least rainfall) is September (1.89").

Average rainfall days in January - Chester, MD
Average rainfall days in January
Chester, MD
  • Average rainfall days in January: 9.3 days

The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is November (8.8 days).

Average snowfall in January - Chester, MD
Average snowfall in January
Chester, MD
  • Average snowfall in January: 1.42"

The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in January - Chester, MD
Average snowfall days in January
Chester, MD
  • Average snowfall days in January: 4.2 days

The month with the highest number of snowfall days is January (4.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in January - Chester, MD
Average sea temperature in January
Chester, 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 - Chester, MD
Average daylight in January /
Average sunshine in January
Chester, 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 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in January - Chester, MD
Average sunshine days in January
Chester, MD
  • Average sunshine days in January: 18.2 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (11.1 days).

Average UV index in January - Chester, MD
Average UV index in January
Chester, 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 and December (UV index 2).

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

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

Average visibility in January - Chester, MD
Average visibility in January
Chester, 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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