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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, in Glenallen, Maryland, is a wintry winter month, with an average temperature ranging between min 26.2°F (-3.2°C) and max 39°F (3.9°C). January is the coldest month, with the temperature often reaching an average high of 39°F (3.9°C) and an average low of 26.2°F (-3.2°C). Weather in January »
Weather in February
The last month of the winter, February, is a chilly month in Glenallen, Maryland, with an average temperature varying between 28.8°F (-1.8°C) and 43.9°F (6.6°C). Glenallen notes an average high-temperature of a frosty 43.9°F (6.6°C) in February, displaying minor variation from January. Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Glenallen, Maryland, with an average temperature fluctuating between 36.1°F (2.3°C) and 52°F (11.1°C). Glenallen's transition into March brings a slight rise in the average high-temperature, moving from a chilly 43.9°F (6.6°C) in February to a fresh 52°F (11.1°C). Weather in March »
Weather in April
April is a comfortable spring month in Glenallen, Maryland, with an average temperature ranging between max 64.2°F (17.9°C) and min 46°F (7.8°C). Glenallen's transition into April is marked by a temperature shift, moving from a fresh 52°F (11.1°C) in March to a refreshing 64.2°F (17.9°C). Weather in April »
Weather in May
May, the last month of the spring in Glenallen, is a warm month, with an average temperature fluctuating between 73.9°F (23.3°C) and 55.8°F (13.2°C). Glenallen's transition into May brings a rise in the average high-temperature, moving from a refreshing 64.2°F (17.9°C) in April to a moderately hot 73.9°F (23.3°C). Weather in May »
Weather in June
June, the first month of the summer in Glenallen, is also a moderately hot month, with an average temperature ranging between max 81.7°F (27.6°C) and min 63.9°F (17.7°C). June brings a slight elevation in the average high-temperature, transitioning from May's warm 73.9°F (23.3°C) to a still moderately hot 81.7°F (27.6°C). Weather in June »
Weather in July
July is a tropical summer month in Glenallen, Maryland, with an average temperature fluctuating between 87.3°F (30.7°C) and 68.7°F (20.4°C). With average high and low temperatures of 87.3°F (30.7°C) and 68.7°F (20.4°C) respectively, July is Glenallen's warmest month. During July, the heat index is appraised at a torrid 98.6°F (37°C). Weather in July »
Weather in August
August, the last month of the summer in Glenallen, is another warm month, with an average temperature ranging between max 84.9°F (29.4°C) and min 67.6°F (19.8°C). The average high-temperature in August, at a moderately hot 84.9°F (29.4°C), reveals a modest deviation from July's 87.3°F (30.7°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Glenallen, Maryland, with an average temperature varying between 60.8°F (16°C) and 78.1°F (25.6°C). The advent of September brings a slight shift in average high-temperature, moving from 84.9°F (29.4°C) in August to a still moderately hot 78.1°F (25.6°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Glenallen, Maryland, with temperature in the range of an average low of 50.2°F (10.1°C) and an average high of 65.8°F (18.8°C). Glenallen's progression into October includes a drop in the average high-temperature, from a warm 78.1°F (25.6°C) in September to a refreshing 65.8°F (18.8°C). Weather in October »
Weather in November
November, the last month of the autumn in Glenallen, is another cool month, with temperature in the range of an average low of 38.8°F (3.8°C) and an average high of 53.4°F (11.9°C). The start of November comes with a reduction in the average high-temperature, receding from a comfortable 65.8°F (18.8°C) in October to a cool 53.4°F (11.9°C). Weather in November »
Weather in December
December, the first month of the winter in Glenallen, is also a frosty month, with an average temperature varying between 32.9°F (0.5°C) and 45.3°F (7.4°C). The beginning of December brings a slight decrease in the average high-temperature, transitioning from a cool 53.4°F (11.9°C) in November to a frosty 45.3°F (7.4°C). Weather in December »
Updated: Jul 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
Glenallen notes the coldest temperatures in January, with a average high of 39°F (3.9°C) and a low of 26.2°F (-3.2°C).
What is the driest month?
The month with the least rainfall is January, when the rain falls for 9.3 days and typically collects 2.17" (55mm) of precipitation.
How much does it rain?
In Glenallen, during the entire year, the rain falls for 160.9 days and collects up to 32.99" (838mm) of precipitation.
When does it snow?
January through April, November and December are months with snowfall.
What is the snowiest month?
The months with the most snowfall are January and March, with an average 3.03" (77mm) of accumulated snow.
How much does it snow?
Throughout the year, there are 17.1 snowfall days, and 10.2" (259mm) of snow is accumulated.
What are the months with the lowest UV index?
January, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the month with the least sunshine?
With an average of 5h of sunshine, February has the least sunshine of the year in Glenallen, Maryland.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the most humid month?
The months with the highest humidity in Glenallen are May, October and December, with an average relative humidity of 76%.
When it does not snow?
May through October are months without snowfall.
When is the highest UV index in Glenallen?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
When are the longest days?
The month with the longest days is June, with an average of 14h and 54min of daylight.
What part of the year is the hottest?
Glenallen's July weather reaches an average high of 87.3°F (30.7°C) and an average low of 68.7°F (20.4°C), making it the warmest month.
What is the least humid month?
July is the least humid month, with an average relative humidity of 70%.
What month has the most sunshine?
The month with the most sunshine is July, with an average of 10.8h of sunshine.
What is the wettest month?
The month with the most rainfall in Glenallen is August, when the rain falls for 17.1 days and typically aggregates up to 4.13" (105mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 30min of daylight.
Average temperature
Glenallen, MD
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (39°F).
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure
Glenallen, MD
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed
Glenallen, MD
- Average wind speed in January:
7.8mph - Average wind speed in February:
7.9mph - Average wind speed in March:
8.1mph - Average wind speed in April:
8mph - Average wind speed in May:
6.5mph - Average wind speed in June:
6mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
5.1mph - Average wind speed in September:
5.7mph - Average wind speed in October:
6.6mph - Average wind speed in November:
7mph - Average wind speed in December:
7.1mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity
Glenallen, MD
The months with the highest relative humidity are May, October and December (76%).
The month with the lowest relative humidity is July (70%).
Average rainfall
Glenallen, MD
- Average rainfall in January:
2.17" - Average rainfall in February:
2.2" - Average rainfall in March:
2.44" - Average rainfall in April:
2.87" - Average rainfall in May:
3.23" - Average rainfall in June:
2.68"
- Average rainfall in July:
3.23" - Average rainfall in August:
4.13" - Average rainfall in September:
2.24" - Average rainfall in October:
2.6" - Average rainfall in November:
2.44" - Average rainfall in December:
2.76"
The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is January (2.17").
Average rainfall days
Glenallen, MD
- Average rainfall days in January:
9.3 days - Average rainfall days in February:
9.5 days - Average rainfall days in March:
13.8 days - Average rainfall days in April:
16.3 days - Average rainfall days in May:
17.8 days - Average rainfall days in June:
15.6 days
- Average rainfall days in July:
17.5 days - Average rainfall days in August:
17.1 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
12.5 days - Average rainfall days in November:
8.8 days - Average rainfall days in December:
10.2 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (8.8 days).
Average snowfall
Glenallen, MD
The months with the highest snowfall are January and March (3.03").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Glenallen, MD
- Average snowfall days in January:
5.1 days - Average snowfall days in February:
5.1 days - Average snowfall days in March:
3.3 days - Average snowfall days in April:
0.2 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
2.9 days
The months with the highest number of snowfall days are January and February (5.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Glenallen, MD
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 3min
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 - Average sunshine in February:
5h and 0min - Average sunshine in March:
6h and 5min - Average sunshine in April:
8h and 5min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 5min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 4min - Average sunshine in December:
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: 5h and 0min).
Average sunshine days
Glenallen, MD
- Average sunshine days in January:
18.1 days - Average sunshine days in February:
14.6 days - Average sunshine days in March:
14 days - Average sunshine days in April:
11.9 days - Average sunshine days in May:
11 days - Average sunshine days in June:
13 days
- Average sunshine days in July:
11 days - Average sunshine days in August:
12.3 days - Average sunshine days in September:
15.6 days - Average sunshine days in October:
16.5 days - Average sunshine days in November:
19.4 days - Average sunshine days in December:
17.5 days
The month with the most sunshine days is November (19.4 days).
The months with the least sunshine days are May and July (11 days).
Average UV index
Glenallen, MD
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, November and December (UV index 2).
Average cloud cover
Glenallen, MD
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility
Glenallen, MD
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Glenallen, Maryland, USA
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