Climate and monthly weather forecast
Greenbelt, MD

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The climate of Greenbelt

Greenbelt, Maryland finds itself situated in the Köppen climate classification of Cfa, indicating a humid subtropical climate with no particular dry season. This climate type turns out to be an expression of the town's geographical position on the USA's east coast, nestled between the Atlantic Ocean and the Appalachian Mountains.

The weather of Greenbelt exhibits a marked seasonality. High temperatures range from 39.9°F (4.4°C) in January to an apex of 87.4°F (30.8°C) in July, outlining a considerable annual thermal amplitude. On the cooler end of the spectrum, temperatures bottom at 27.7°F (-2.4°C) in January and peak at 70°F (21.1°C) in July.

Humidity relative rates tend to oscillate between 71% in April and 76% in May, September, and December, maintaining a slightly moist atmosphere throughout the year. Rainfall amounts increase from 2.01" (51mm) in January to a top quantity of 3.58" (91mm) in August, while the rainfall distribution extends from 9.3 days in January to 17.9 days in May. A distinctive feature is the cessation of snowfall from May to November, with the snowiest months being January and February, registering 2.6" (66mm) and 2.24" (57mm), respectively.

The best time to visit Greenbelt

To fully enjoy Greenbelt, times of milder temperatures and lower rainfall prove the most favorable. This would point towards the months of May and October. In May, high temperatures average around 73.9°F (23.3°C), while the lowest hover around 57°F (13.9°C) under a relative humidity of 76%. Rainfall reaches 2.99" (76mm) distributed over 17.9 days, and daylight extends for 14.3 hours. On the other hand, October presents highs of 66.2°F (19°C), lows of 51.8°F (11°C), humidity at 76%, and rainfall amassing to 2.64" (67mm) over 11.8 days. Daylight in October shortens to 11.2 hours.

The worst time to visit Greenbelt

July and August signify the less hospitable months in Greenbelt. July features the highest temperatures of the year, with highs reaching 87.4°F (30.8°C) and lows only going down to 70°F (21.1°C). It also contributes 3.11" (79mm) of rainfall over 16.8 days. August retains the warmth with high temperatures around 85.1°F (29.5°C) and lows at 68.7°F (20.4°C), and maxes out the rainfall with 3.58" (91mm) over 15.8 days.

Spring weather in Greenbelt

As Greenbelt blooms into spring, weather parameters begin to respond. March is met with high temperatures averaging at 52.3°F (11.3°C) and lows round 37.4°F (3°C) under a relative humidity of 72%. Rainfall sits at 2.36" (60mm) dispersed across 13.8 days with negligible snowfall. April sees an uptick in temperatures, with maximums up to 64.8°F (18.2°C) and minimums at 47.3°F (8.5°C). Rainfall increases slightly to 2.72" (69mm) over 15.9 days. By May, high temperatures average at 73.9°F (23.3°C) while lows stand at 57°F (13.9°C), and rainfall peaks at 2.99" (76mm) over 17.9 days.

Summer weather in Greenbelt

Alongside the summer season, temperatures in Greenbelt elevate further. June records highs of 81.9°F (27.7°C) and lows of 64.6°F (18.1°C) with 2.8" (71mm) of rainfall across 15.5 days. The peak of the summer arrives in July, showcasing the warmest month with high temperatures hitting 87.4°F (30.8°C) and lows at 70°F (21.1°C). Rainfall slightly increases to 3.11" (79mm) dispensed over 16.8 days. August maintains the warmth with highs of 85.1°F (29.5°C) and lows of 68.7°F (20.4°C) but raises the rainfall to its peak level of 3.58" (91mm).

Autumn weather in Greenbelt

The coming of autumn in Greenbelt witnesses the inversion of the temperature trend. September averages bring high temperatures down to 78.1°F (25.6°C) and bottoms at 62.2°F (16.8°C) under a relative humidity of 74%. Rainfall retreats to 2.09" (53mm) spread across 12.3 days. October continues the cooling trend with highs of 66.2°F (19°C), lows of 51.8°F (11°C), and rainfall culminating at 2.64" (67mm) over 11.8 days. November lowers temperature highs to 54.1°F (12.3°C) and bottoms at 40.1°F (4.5°C) with rainfall at 2.17" (55mm) over 9 days.

Winter weather in Greenbelt

The chill of winter in Greenbelt is introduced with December's average high and low temperatures of 45.5°F (7.5°C) and 34.3°F (1.3°C), respectively. Rainfall hits 2.6" (66mm) over 9.8 days and gives the first snowfall since zero inches were reported from May to November, marking 0.67" (17mm) of snow. January, although the coldest, remains the snowiest month, with high temperatures around 39.9°F (4.4°C), lows touching 27.7°F (-2.4°C), rainfall at 2.01" (51mm), and snowfall peaking at 2.6" (66mm) across the month. February concludes the winter season with temperatures warming up slightly to highs of 44.2°F (6.8°C) and lows of 30°F (-1.1°C) amidst 2.24" (57mm) of snowfall.

Weather in January

The city of Greenbelt awakens to a new year under conditions typical of a Maryland winter. January weather features cold temperatures, with an average high of 39.9°F (4.4°C) and a low of 27.7°F (-2.4°C). Relative humidity and cloud cover are usually at their most during this month, resulting in foggy mornings and cloudy days. Weather in January »

Weather in February

February carries on the winter chill from January, albeit slightly warmer. The shift in temperature is not dramatic but the relative humidity and cloud cover ease up a bit. February takes up the baton from January, characterized by cold winds with an excessively harsh gust speed peaking at 13mph (20.9km/h). Weather in February »

Weather in March

As Greenbelt moves into March, the city starts shaking off the remnants of the harsh winter. The modest increase in temperature is welcomed by residents with open arms, with daylight hours increasing to 12 hours. The variation in daylight between February and March is the highest throughout the year. Weather in March »

Weather in April

Greenbelt residents anticipate April for its reputation of heralding the true beginning of Spring. Temperature averages from 52.3°F (11.3°C) to 64.8°F (18.2°C) mark both a farewell to snowfall and a welcome to rainfall. The distinction between night and day is even more pronounced, as the length of daylight extends to an appealing 13.3 hours. Weather in April »

Weather in May

As the merry month of May arrives, Greenbelt, Maryland princely bathes under sunshine for 14.3 hours a day. The temperatures are mild, ranging from 57°F (13.9°C) to 73.9°F (23.3°C). The city is lively, with blooming buds and chirping birds. Weather in May »

Weather in June

June marks the arrival of summertime in Greenbelt. Days are longest in June, with daylight stretching up to 14.9 hours, and average temperatures hovering between 64.6°F (18.1°C) and 81.9°F (27.7°C). Evenings serve as a pleasant relief after the gradual daytime heat. Weather in June »

Weather in July

The sun-coated days of July extend the gold-studded summer afternoons of June in Greenbelt. The heat of July is the year's peak, with temperatures soaring to 87.4°F (30.8°C). The summer bloom and the brilliant blue sky are both inviting and pleasing to the eye. Weather in July »

Weather in August

Not so far behind from July, August brings a slight dip in temperature as well as in the duration of daylight. The classic summertime weather, with temperatures from 68.7°F (20.4°C) to 85.1°F (29.5°C), persists throughout, providing continued opportunities for summertime recreation. Weather in August »

Weather in September

September brings mild days and brisk nights in Greenbelt. The change in seasons from summer to fall is noticeable, with temperatures dropping from August's high. The nights become cooler, and the leaves start turning, signaling the city's first few steps into fall. Weather in September »

Weather in October

The full swing of fall in October brings a delightful chill and crispness to the air. As the temperatures continue to retreat, locals often find this month to be extremely agreeable weather-wise. The atmospheric pressure stays relatively stable, maintaining around 30.04" (763mm). Weather in October »

Weather in November

The introduction of November signals the onset of winter in Greenbelt. Experiencing temperatures from 40.1°F (4.5°C) to 54.1°F (12.3°C), November’s cold is a precursor for December’s chilling winds. This month's transformation intensifies the fall scene exhibited in October, preparing Greenbelt residents for the imminent winter wonderland. Weather in November »

Weather in December

The final month, December, rolls out a beautiful wintry scene for Greenbelt, marked by the year's shortest daylight hours, 9.5 hours. As the region readies to bid adieu to the year, the unmistakable signs of winter peek in with a moderate snowfall of 0.67" (17mm). Weather in December »
Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest?

In Greenbelt, Maryland, the lowest temperatures are generally noted in January, averaging a high of 39.9°F (4.4°C) and a low of 27.7°F (-2.4°C).

What is the driest month in Greenbelt?

The month with the least rainfall is January, when the rain falls for 9.3 days and typically collects 2.01" (51mm) of precipitation.

How much does it rain?

Throughout the year, there are 157.9 rainfall days, and 31.14" (791mm) of precipitation is accumulated.

When does it snow?

Months with snowfall in Greenbelt are January through April and December.

What is the snowiest month?

The month with the most snowfall is January, when snow falls for 4.1 days and typically aggregates up to 2.6" (66mm) of snow.

How many days does it snow?

Throughout the year, in Greenbelt, there are 13.5 snowfall days, and 7.2" (183mm) of snow is accumulated.

What are the months with the lowest UV index?

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

What is the month with the least sunshine?

With an average of 5h 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, 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 are the least humid months?

The months with the lowest humidity are April and July, with an average relative humidity of 71%.

What are the most humid months?

May, October and December, with an average relative humidity of 76%, are most humid months.

When it does not snow?

In Greenbelt, snow does not fall in May through November.

What are the months with the highest UV index?

May through August, with an average maximum UV index of 6, are months with the highest UV index.

When are the longest days?

With an average of 14h and 54min of daylight, June has the longest days of the year.

What month is the hottest?

July temperatures tend to peak at an average high of 87.4°F (30.8°C) and dip to a low of 70°F (21.1°C).

What month has the most sunshine?

July has the most sunshine of the year, with an average of 10.9h of sunshine.

What is the rainiest month?

August is the month with the most rainfall. Rain falls for 15.8 days and accumulates 3.58" (91mm) 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.
Today
Tomorrow
Long-term
YearJFMAMJJASOND

Average temperature
Greenbelt, MD

Average temperature - Greenbelt, MD

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.9°F).

The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).

Average pressure
Greenbelt, MD

Average pressure - Greenbelt, MD

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
Greenbelt, MD

Average wind speed - Greenbelt, MD

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity
Greenbelt, MD

Average humidity - Greenbelt, MD

The months with the highest relative humidity are May, October and December (76%).
The months with the lowest relative humidity are April and July (71%).

Average rainfall
Greenbelt, MD

Average rainfall - Greenbelt, MD

The wettest month (with the highest rainfall) is August (3.58").
The driest month (with the least rainfall) is January (2.01").

Average rainfall days
Greenbelt, MD

Average rainfall days - Greenbelt, MD

The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is November (9 days).

Average snowfall
Greenbelt, MD

Average snowfall - Greenbelt, MD

The month with the highest snowfall is January (2.6").
The months with the least snowfall are May, June, July, August, September, October and November (0").

Average snowfall days
Greenbelt, MD

Average snowfall days - Greenbelt, MD

The month with the highest number of snowfall days is January (4.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight / Average sunshine
Greenbelt, MD

Average daylight / Average sunshine - Greenbelt, MD

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).

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
Greenbelt, MD

Average sunshine days - Greenbelt, MD

The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (11.8 days).

Average UV index
Greenbelt, MD

Average UV index - Greenbelt, 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 and December (UV index 2).

Average cloud cover
Greenbelt, MD

Average cloud cover - Greenbelt, MD

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).

Average visibility
Greenbelt, MD

Average visibility - Greenbelt, 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).

Greenbelt, Maryland, USA

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