January weather forecast
Chestnut Hill, MD

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Weather in January

January, like December, in Chestnut Hill, Maryland, is an icy winter month, with temperature in the range of an average low of 25.9°F (-3.4°C) and an average high of 37.9°F (3.3°C).

Temperature

Chestnut Hill witnesses the coldest weather in January, with temperatures averaging a high of 37.9°F (3.3°C) and a low of 25.9°F (-3.4°C).

Humidity

In Chestnut Hill, the average relative humidity in January is 74%.

Rainfall

The month with the least rainfall is January, when the rain falls for 5.2 days and typically collects 0.47" (12mm) of precipitation.

Snowfall

Months with snowfall are January through April, November and December. January is the month with the most snowfall. Snow falls for 3.1 days and accumulates 0.55" (14mm) of snow.

Daylight

The average length of the day in January is 9h and 47min.
On the first day of the month, sunrise is at 7:26 am and sunset at 4:54 pm. On the last day of January, sunrise is at 7:15 am and sunset at 5:25 pm EST.

Sunshine

The average sunshine in January is 5.1h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: An average maximum UV index of 2 in January leads to these recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Updated: Aug 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest?

The month of January, characterized by an average high of 37.9°F (3.3°C) and a low of 25.9°F (-3.4°C), is recognized as the coldest.

How cold is January?

The average high-temperature and low-temperature during January are 37.9°F (3.3°C) and 25.9°F (-3.4°C) respectively.

What is the average humidity in January?

In Chestnut Hill, the average relative humidity in January is 74%.

What is the driest month?

The month with the least rainfall is January, when the rain falls for 5.2 days and typically collects 0.47" (12mm) of precipitation.

How many days does it rain in January?

In Chestnut Hill, in January, during 5.2 rainfall days, 0.47" (12mm) of precipitation is typically accumulated.

What is the snowiest month?

The month with the most snowfall is January, when snow falls for 3.1 days and typically aggregates up to 0.55" (14mm) of snow.

How many days does it snow in January?

In Chestnut Hill, during January, snow falls for 3.1 days and regularly aggregates up to 0.55" (14mm) of snow.

How many hours of daylight does Chestnut Hill have in January?

In Chestnut Hill, the average day length in January is 9h and 47min.

When is the sunrise / sunset in January?

In January, on the first day of the month, sunrise is at 7:26 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 5:25 pm EST.

How many hours of sunshine does Chestnut Hill have in January?

In Chestnut Hill, the average sunshine duration in January is 5.1h.

What is the month with the lowest UV index in Chestnut Hill?

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

What is the UV index intensity in January?

In Chestnut Hill, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
43.9°F 6.6°C
37.9°F 3.3°C
41.4°F 5.2°C
Average low temperature
33.1°F 0.6°C
25.9°F -3.4°C
28.2°F -2.1°C
Average pressure
30.11" 765mmHg
30.1" 765mmHg
30.07" 764mmHg
Average wind speed
8.3mph 13.4km/h
8.9mph 14.3km/h
8.9mph 14.3km/h
Average max. wind speed
8.9mph 14.3km/h
9.7mph 15.6km/h
9.7mph 15.6km/h
Average wind speed gusts
13.5mph 21.7km/h
14.5mph 23.3km/h
14.7mph 23.7km/h
Average humidity
77%
74%
76%
Average rainfall
0.75" 19mm
0.47" 12mm
0.51" 13mm
Average rainfall days
7
5.2
6
Average snowfall
0.24" 6mm
0.55" 14mm
0.35" 9mm
Average snowfall days
2
3.1
3.8
Average daylight
9h 3min
9h 5min
10h 4min
Average sunshine
5h 0min
5h 1min
4h 5min
Average sunshine days
21.9
22.6
18.7
Average UV index
2
2
2
Average cloud cover
45%
44%
46%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Chestnut Hill, MD

Average temperature in January - Chestnut Hill, MD
  • Average high temperature in January: 37.9°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in January: 25.9°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).

Average pressure in January
Chestnut Hill, MD

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

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in January
Chestnut Hill, MD

Average wind speed in January - Chestnut Hill, MD
  • Average wind speed in January: 8.9mph

The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

Average humidity in January
Chestnut Hill, MD

Average humidity in January - Chestnut Hill, MD
  • Average humidity in January: 74%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is April (73%).

Average rainfall in January
Chestnut Hill, MD

Average rainfall in January - Chestnut Hill, MD
  • Average rainfall in January: 0.47"

The wettest month (with the highest rainfall) is August (1.46").
The driest month (with the least rainfall) is January (0.47").

Average rainfall days in January
Chestnut Hill, MD

Average rainfall days in January - Chestnut Hill, MD
  • Average rainfall days in January: 5.2 days

The month with the highest number of rainy days is July (12.6 days).
The month with the least rainy days is January (5.2 days).

Average snowfall in January
Chestnut Hill, MD

Average snowfall in January - Chestnut Hill, MD
  • Average snowfall in January: 0.55"

The month with the highest snowfall is January (0.55").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in January
Chestnut Hill, MD

Average snowfall days in January - Chestnut Hill, MD
  • Average snowfall days in January: 3.1 days

The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in January /
Average sunshine in January
Chestnut Hill, MD

Average daylight in January / Average sunshine in January - Chestnut Hill, 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 1min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

Average sunshine days in January
Chestnut Hill, MD

Average sunshine days in January - Chestnut Hill, MD
  • Average sunshine days in January: 22.6 days

The month with the most sunshine days is November (22.9 days).
The month with the least sunshine days is July (15.2 days).

Average UV index in January
Chestnut Hill, MD

Average UV index in January - Chestnut Hill, 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, November and December (UV index 2).

Average cloud cover in January
Chestnut Hill, MD

Average cloud cover in January - Chestnut Hill, MD
  • Average cloud cover in January: 44

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).

Average visibility in January
Chestnut Hill, MD

Average visibility in January - Chestnut Hill, 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).

Chestnut Hill, Maryland, USA

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