January weather forecast
Glen Isle, MD

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Weather in January

January, like December, in Glen Isle, Maryland, is another cold winter month, with temperature in the range of an average low of 29.8°F (-1.2°C) and an average high of 40.3°F (4.6°C).

Temperature

Glen Isle's January weather reaches an average high of 40.3°F (4.6°C) and an average low of 29.8°F (-1.2°C), making it 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. January is the month with the most snowfall. Snow falls for 2.3 days and accumulates 0.67" (17mm) of snow.

Daylight

In Glen Isle, the average length of the day in January is 9h and 48min.
On the first day of January, sunrise is at 7:25 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 5:25 pm EST.

Sunshine

In Glen Isle, the average sunshine in January is 5.3h.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily maximum UV index of 2 in January interprets into the following advice:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Updated: Jul 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the coldest?

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

How cold does it get in January?

The average high-temperature, in January, in Glen Isle, is 40.3°F (4.6°C), while the average low-temperature is 29.8°F (-1.2°C).

What are the least humid months?

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

What is the average humidity in January?

In January, the average relative humidity is 72%.

What is the driest month?

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

How many days does it rain in January?

In Glen Isle, in January, during 6 rainfall days, 0.47" (12mm) of precipitation is typically accumulated.

When does it snow the most?

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.

How many days does it snow in January?

In Glen Isle, in January, snow falls for 2.3 days, with typically accumulated 0.67" (17mm) of snow.

What is the average length of the day in January?

In January, the average day length in Glen Isle is 9h and 48min.

What time are sunrise and sunset in January?

In January, on the first day of the month, sunrise is at 7:25 am and sunset at 4:54 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 5:25 pm EST.

How many hours of sunshine does Glen Isle have in January?

In January, the average sunshine duration is 5.3h.

What are the months with the lowest UV index?

January, February 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?

In January, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
46°F 7.8°C
40.3°F 4.6°C
43°F 6.1°C
Average low temperature
36.5°F 2.5°C
29.8°F -1.2°C
32°F 0°C
Average pressure
30.11" 765mmHg
30.1" 765mmHg
30.07" 764mmHg
Average wind speed
9.3mph 15km/h
10mph 16.1km/h
9.9mph 15.9km/h
Average max. wind speed
9.9mph 15.9km/h
10.7mph 17.2km/h
10.6mph 17.1km/h
Average wind speed gusts
15.1mph 24.3km/h
16mph 25.7km/h
16.5mph 26.6km/h
Average humidity
75%
72%
73%
Average rainfall
0.67" 17mm
0.47" 12mm
0.55" 14mm
Average rainfall days
7.4
6
6.4
Average snowfall
0.12" 3mm
0.67" 17mm
0.2" 5mm
Average snowfall days
1.5
2.3
2.5
Average daylight
9h 3min
9h 5min
10h 5min
Average sunshine
5h 1min
5h 2min
5h 0min
Average sunshine days
21.5
23
19.2
Average UV index
2
2
2
Average cloud cover
44%
43%
45%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Glen Isle, MD

Average temperature in January - Glen Isle, 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).

Average pressure in January
Glen Isle, MD

Average pressure in January - Glen Isle, 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
Glen Isle, MD

Average wind speed in January - Glen Isle, 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).

Average humidity in January
Glen Isle, MD

Average humidity in January - Glen Isle, 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%).

Average rainfall in January
Glen Isle, MD

Average rainfall in January - Glen Isle, 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").

Average rainfall days in January
Glen Isle, MD

Average rainfall days in January - Glen Isle, 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).

Average snowfall in January
Glen Isle, MD

Average snowfall in January - Glen Isle, 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").

Average snowfall days in January
Glen Isle, MD

Average snowfall days in January - Glen Isle, 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).

Average daylight in January /
Average sunshine in January
Glen Isle, MD

Average daylight in January / Average sunshine in January - Glen Isle, 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 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in January
Glen Isle, MD

Average sunshine days in January - Glen Isle, 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
Glen Isle, MD

Average UV index in January - Glen Isle, 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).

Average cloud cover in January
Glen Isle, MD

Average cloud cover in January - Glen Isle, 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).

Average visibility in January
Glen Isle, MD

Average visibility in January - Glen Isle, 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).

Glen Isle, Maryland, USA

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