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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
Climate and monthly weather forecast
Weather in January
January, like December, in Upper Marlboro, Maryland, is an icy winter month, with an average temperature fluctuating between 40.1°F (4.5°C) and 28.2°F (-2.1°C). Upper Marlboro reaches its lowest average temperatures in January, measuring 40.1°F (4.5°C) at the peak and 28.2°F (-2.1°C) at the lowest. Weather in January »
Weather in February
The last month of the winter, February, is a frosty month in Upper Marlboro, Maryland, with an average temperature varying between 44.6°F (7°C) and 30.9°F (-0.6°C). The advent of February presents an average high-temperature of a frosty 44.6°F (7°C), maintaining a close correlation with the preceding month. Weather in February »
Weather in March
March, the first month of the spring in Upper Marlboro, is a fresh month, with an average temperature fluctuating between 37.9°F (3.3°C) and 52.3°F (11.3°C). A gentle upsurge in temperatures occurs as February gives way to March, with average highs shifting from a frosty 44.6°F (7°C) to a fresh 52.3°F (11.3°C). Weather in March »
Weather in April
April is a comfortable spring month in Upper Marlboro, Maryland, with temperature in the range of an average high of 64.4°F (18°C) and an average low of 47.7°F (8.7°C). April's onset brings a rise in the average high-temperature, moving from a fresh 52.3°F (11.3°C) in March to an enjoyable 64.4°F (18°C). Weather in April »
Weather in May
The last month of the spring, May, is a warm month in Upper Marlboro, Maryland, with an average temperature ranging between min 57°F (13.9°C) and max 73.6°F (23.1°C). Upper Marlboro in May shows a temperature shift, moving from an average high of an enjoyable 64.4°F (18°C) in April to a moderately hot 73.6°F (23.1°C). Weather in May »
Weather in June
The first month of the summer, June, is still a warm month in Upper Marlboro, Maryland, with an average temperature varying between 81.5°F (27.5°C) and 64.9°F (18.3°C). A soft shift in the average high-temperature is noticeable in June, transitioning from 73.6°F (23.1°C) in May to a still moderately hot 81.5°F (27.5°C). Weather in June »
Weather in July
July in Upper Marlboro, Maryland, is a hot summer month, with an average temperature ranging between min 69.8°F (21°C) and max 86.7°F (30.4°C). July is the month that records the highest temperatures, with averages ranging from a high of 86.7°F (30.4°C) to a low of 69.8°F (21°C). The heat index in July is appraised at a torrid 98.6°F (37°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Upper Marlboro, Maryland, with temperature in the range of an average low of 68.5°F (20.3°C) and an average high of 84.6°F (29.2°C). During August, Upper Marlboro observes a subtle ascent to a warm 84.6°F (29.2°C) from July's 86.7°F (30.4°C) in the average high-temperature. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Upper Marlboro, Maryland, with an average temperature ranging between min 63°F (17.2°C) and max 78.3°F (25.7°C). With the arrival of September, Upper Marlboro experiences a modest decline in average high-temperatures, transitioning from 84.6°F (29.2°C) in August to a still moderately hot 78.3°F (25.7°C). Weather in September »
Weather in October
October, like September, in Upper Marlboro, Maryland, is another comfortable autumn month, with an average temperature ranging between min 52.2°F (11.2°C) and max 66.2°F (19°C). The start of October comes with a reduction in the average high-temperature, receding from a moderately hot 78.3°F (25.7°C) in September to a refreshing 66.2°F (19°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Upper Marlboro, Maryland, with an average temperature varying between 40.6°F (4.8°C) and 54.5°F (12.5°C). The commencement of November indicates a shift in the average high-temperature, receding from October's refreshing 66.2°F (19°C) to a fresh 54.5°F (12.5°C). Weather in November »
Weather in December
The first month of the winter, December, is still a chilly month in Upper Marlboro, Maryland, with an average temperature varying between 45.7°F (7.6°C) and 34.7°F (1.5°C). December's arrival signals a moderate reduction in the average high-temperature, easing from a fresh 54.5°F (12.5°C) in November to a chilly 45.7°F (7.6°C). Weather in December »
Updated: Jun 4, 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 are the coldest months?
With average high and low temperatures of 40.1°F (4.5°C) and 28.2°F (-2.1°C) respectively, January is Upper Marlboro's coldest month.
What are the least humid months?
The months with the lowest humidity are January, March and April, with an average relative humidity of 72%.
What is the driest month?
The month with the least rainfall is January, when the rain falls for 9.4 days and typically collects 2.05" (52mm) of precipitation.
How many days does it rain?
In Upper Marlboro, during the entire year, the rain falls for 164.8 days and collects up to 32.87" (835mm) of precipitation.
When does it snow in Upper Marlboro?
January through April, November and December are months with snowfall.
What is the snowiest month?
The month with the most snowfall is January, when snow falls for 4.6 days and typically aggregates up to 2.76" (70mm) of snow.
How much does it snow?
In Upper Marlboro, during the entire year, snow falls for 15.1 days and aggregates up to 8.5" (216mm) of snow.
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 5.1h of sunshine, February has the least sunshine of the year.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Upper Marlboro, Maryland, 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?
May is the most humid month in Upper Marlboro, with an average relative humidity of 77%.
When it does not snow?
In Upper Marlboro, snow does not fall in May through October.
What are the months with the highest UV index?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
When are the longest days?
June has the longest days of the year, with an average of 14h and 48min of daylight.
What part of the year is the hottest?
The average temperatures reach their apex in July, averaging 86.7°F (30.4°C) at the high end and 69.8°F (21°C) at the low end.
What month has the most sunshine?
July has the most sunshine of the year in Upper Marlboro, Maryland, with an average of 11h of sunshine.
What is the rainiest month?
The month with the most rainfall is August, when the rain falls for 17.3 days and typically aggregates up to 3.94" (100mm) of precipitation.
What is the month with the shortest days in Upper Marlboro?
December has the shortest days of the year, with an average of 9h and 30min of daylight.
Average temperature
Upper Marlboro, MD
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (40.1°F).
The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).
Average pressure
Upper Marlboro, 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:
29.94"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 (29.94"Hg).
Average wind speed
Upper Marlboro, MD
- Average wind speed in January:
8.3mph - Average wind speed in February:
8.3mph - Average wind speed in March:
8.5mph - Average wind speed in April:
8.3mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.4mph - Average wind speed in August:
5.4mph - Average wind speed in September:
6.2mph - Average wind speed in October:
7.3mph - Average wind speed in November:
7.6mph - Average wind speed in December:
7.6mph
The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.4mph).
Average humidity
Upper Marlboro, MD
The month with the highest relative humidity is May (77%).
The months with the lowest relative humidity are January, March and April (72%).
Average rainfall
Upper Marlboro, MD
- Average rainfall in January:
2.05" - Average rainfall in February:
2.17" - Average rainfall in March:
2.44" - Average rainfall in April:
2.76" - Average rainfall in May:
3.03" - Average rainfall in June:
2.91"
- Average rainfall in July:
3.62" - Average rainfall in August:
3.94" - Average rainfall in September:
2.36" - Average rainfall in October:
2.8" - Average rainfall in November:
2.13" - Average rainfall in December:
2.68"
The wettest month (with the highest rainfall) is August (3.94").
The driest month (with the least rainfall) is January (2.05").
Average rainfall days
Upper Marlboro, MD
- Average rainfall days in January:
9.4 days - Average rainfall days in February:
10.4 days - Average rainfall days in March:
14.5 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
17.7 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
17.3 days - Average rainfall days in September:
13.9 days - Average rainfall days in October:
12.3 days - Average rainfall days in November:
8.8 days - Average rainfall days in December:
11.1 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (8.8 days).
Average snowfall
Upper Marlboro, MD
The month with the highest snowfall is January (2.76").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Upper Marlboro, MD
- Average snowfall days in January:
4.6 days - Average snowfall days in February:
4.3 days - Average snowfall days in March:
2.9 days - Average snowfall days in April:
0.3 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:
2.5 days
The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Upper Marlboro, 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 1min - 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 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
5h and 2min - Average sunshine in February:
5h and 1min - Average sunshine in March:
6h and 5min - Average sunshine in April:
9h and 0min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
11h and 0min - Average sunshine in August:
10h and 2min - Average sunshine in September:
9h and 1min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 5min - Average sunshine in December:
5h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days
Upper Marlboro, MD
- Average sunshine days in January:
18.1 days - Average sunshine days in February:
14.2 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
12.3 days - Average sunshine days in May:
11.7 days - Average sunshine days in June:
11.6 days
- Average sunshine days in July:
10.8 days - Average sunshine days in August:
11.7 days - Average sunshine days in September:
14.7 days - Average sunshine days in October:
17.3 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
16.7 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (10.8 days).
Average UV index
Upper Marlboro, 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
Upper Marlboro, MD
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility
Upper Marlboro, MD
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).