Climate and monthly weather forecastBethesda, MD
Climate and monthly weather forecast
Weather in January
January, like December, in Bethesda, Maryland, is a wintry winter month, with temperature in the range of an average low of 27°F (-2.8°C) and an average high of 39.9°F (4.4°C). Bethesda reaches its lowest average temperatures in January, measuring 39.9°F (4.4°C) at the peak and 27°F (-2.8°C) at the lowest. Weather in January »Weather in February
February, the last month of the winter in Bethesda, is a chilly month, with an average temperature fluctuating between 29.7°F (-1.3°C) and 44.1°F (6.7°C). The transition into February marks the average high-temperature at a chilly 44.1°F (6.7°C), differing minimally from January's 39.9°F (4.4°C). Weather in February »Weather in March
The first month of the spring, March, is a fresh month in Bethesda, Maryland, with an average temperature fluctuating between 52.7°F (11.5°C) and 36.9°F (2.7°C). In March, the average high-temperature marginally rises from a chilly 44.1°F (6.7°C) in February to a cool 52.7°F (11.5°C). Weather in March »Weather in April
April in Bethesda, Maryland, is an enjoyable spring month, with an average temperature varying between 46.4°F (8°C) and 64.9°F (18.3°C). The shift from March to April is marked by an increase in the average high-temperature, moving from a cool 52.7°F (11.5°C) to an enjoyable 64.9°F (18.3°C). Weather in April »Weather in May
The last month of the spring, May, is a moderately hot month in Bethesda, Maryland, with an average temperature ranging between min 56.3°F (13.5°C) and max 74.5°F (23.6°C). Bethesda experiences a temperature shift with the start of May, with average high-temperatures moving from an enjoyable 64.9°F (18.3°C) in April to a warm 74.5°F (23.6°C). Weather in May »Weather in June
June, the first month of the summer in Bethesda, is still a warm month, with an average temperature fluctuating between 82.8°F (28.2°C) and 64.2°F (17.9°C). The beginning of June marks a minor shift in the average high-temperature, moving from May's 74.5°F (23.6°C) to a still moderately hot 82.8°F (28.2°C). Weather in June »Weather in July
July in Bethesda, Maryland, is a tropical summer month, with temperature in the range of an average high of 87.8°F (31°C) and an average low of 69.4°F (20.8°C). In Bethesda, temperatures reach their average annual highs in July, measuring 87.8°F (31°C) and a minimum average of 69.4°F (20.8°C). The average heat index in July is appraised at a very hot 98.6°F (37°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Bethesda, Maryland, with temperature in the range of an average low of 68°F (20°C) and an average high of 85.8°F (29.9°C). Bethesda marks the onset of August with an average high-temperature of a warm 85.8°F (29.9°C), a subtle shift from July's 87.8°F (31°C). Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Bethesda, Maryland, with temperature in the range of an average low of 61.5°F (16.4°C) and an average high of 78.4°F (25.8°C). September heralds a minor drop in average high-temperature, sliding from August's 85.8°F (29.9°C) to a still moderately hot 78.4°F (25.8°C). Weather in September »Weather in October
October, like September, in Bethesda, Maryland, is another comfortable autumn month, with an average temperature varying between 50.7°F (10.4°C) and 66.2°F (19°C). The onset of October results in a decrease in the average high-temperature, receding from a warm 78.4°F (25.8°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 another cool month in Bethesda, Maryland, with temperature in the range of an average high of 53.8°F (12.1°C) and an average low of 39°F (3.9°C). With the onset of November, Bethesda experiences a modest temperature adjustment, with the average high-temperature receding from a comfortable 66.2°F (19°C) in October to a cool 53.8°F (12.1°C). Weather in November »Weather in December
The first month of the winter, December, is still a chilly month in Bethesda, Maryland, with temperature in the range of an average high of 45.3°F (7.4°C) and an average low of 33.1°F (0.6°C). The beginning of December brings a minor change in the average high-temperature, shifting from a cool 53.8°F (12.1°C) in November to a frosty 45.3°F (7.4°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
The coldest month is January, with an average high-temperature of 39.9°F (4.4°C) and an average low-temperature of 27°F (-2.8°C).
The month with the least rainfall is January, when the rain falls for 8.7 days and typically collects 1.69" (43mm) of precipitation.
Throughout the year, there are 150.3 rainfall days, and 28.66" (728mm) of precipitation is accumulated.
January through April, November and December are months with snowfall in Bethesda.
January is the month with the most snowfall. Snow falls for 4.3 days and accumulates 2.6" (66mm) of snow.
In Bethesda, during the entire year, snow falls for 13.7 days and aggregates up to 8.39" (213mm) of snow.
January, February and December, with an average of 5h of sunshine, are months with the least sunshine in Bethesda.
January, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
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.
In Bethesda, snow does not fall in May through October.
May through August, with an average maximum UV index of 6, are months with the highest UV index.
June has the longest days of the year, with an average of 14h and 54min of daylight.
July, characterized by an average high temperature of 87.8°F (31°C) and a low temperature of 69.4°F (20.8°C), is generally the warmest month in Bethesda.
With an average relative humidity of 69%, July is the least humid month.
July has the most sunshine of the year in Bethesda, with an average of 10.7h of sunshine.
August is the month with the most rainfall. Rain falls for 16.7 days and accumulates 3.82" (97mm) of precipitation.
The most humid month is December, with an average relative humidity of 76%.
December has the shortest days of the year, with an average of 9h and 30min of daylight.
Average temperature
Bethesda, MD
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (39.9°F).
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (27°F).
Average pressure
Bethesda, 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
Bethesda, MD
- Average wind speed in January:
7.6mph - Average wind speed in February:
7.8mph - Average wind speed in March:
8mph - Average wind speed in April:
7.8mph - Average wind speed in May:
6.5mph - Average wind speed in June:
5.9mph
- 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:
6.9mph - Average wind speed in December:
7mph
The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity
Bethesda, MD
The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is July (69%).
Average rainfall
Bethesda, MD
- Average rainfall in January:
1.69" - Average rainfall in February:
1.89" - Average rainfall in March:
2.09" - Average rainfall in April:
2.36" - Average rainfall in May:
2.99" - Average rainfall in June:
2.52"
- Average rainfall in July:
2.95" - Average rainfall in August:
3.82" - Average rainfall in September:
2.05" - Average rainfall in October:
2.13" - Average rainfall in November:
2.01" - Average rainfall in December:
2.17"
The wettest month (with the highest rainfall) is August (3.82").
The driest month (with the least rainfall) is January (1.69").
Average rainfall days
Bethesda, MD
- Average rainfall days in January:
8.7 days - Average rainfall days in February:
9.3 days - Average rainfall days in March:
12.6 days - Average rainfall days in April:
14.6 days - Average rainfall days in May:
17.1 days - Average rainfall days in June:
13.8 days
- Average rainfall days in July:
16.1 days - Average rainfall days in August:
16.7 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
9.9 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is November (8.5 days).
Average snowfall
Bethesda, MD
The month with the highest snowfall is January (2.6").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Bethesda, MD
- Average snowfall days in January:
4.3 days - Average snowfall days in February:
4.4 days - Average snowfall days in March:
2.6 days - Average snowfall days in April:
0.1 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:
0.3 days - Average snowfall days in December:
2 days
The month with the highest number of snowfall days is February (4.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Bethesda, MD
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 54min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 30min
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 0min - Average sunshine in February:
5h and 0min - Average sunshine in March:
6h and 48min - Average sunshine in April:
8h and 48min - Average sunshine in May:
8h and 48min - Average sunshine in June:
10h and 6min
- Average sunshine in July:
10h and 42min - Average sunshine in August:
10h and 12min - Average sunshine in September:
8h and 48min - Average sunshine in October:
5h and 36min - Average sunshine in November:
5h and 48min - Average sunshine in December:
5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 0min).
Average sunshine days
Bethesda, MD
- Average sunshine days in January:
18.1 days - Average sunshine days in February:
15.5 days - Average sunshine days in March:
15.8 days - Average sunshine days in April:
13.8 days - Average sunshine days in May:
12.3 days - Average sunshine days in June:
14.3 days
- Average sunshine days in July:
12.3 days - Average sunshine days in August:
12.7 days - Average sunshine days in September:
15.8 days - Average sunshine days in October:
18.5 days - Average sunshine days in November:
20.4 days - Average sunshine days in December:
19.1 days
The month with the most sunshine days is November (20.4 days).
The months with the least sunshine days are May and July (12.3 days).
Average UV index
Bethesda, 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
Bethesda, 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
Bethesda, 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).
