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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, is a frosty winter month in Rockville, Virginia, with an average temperature varying between 44.2°F (6.8°C) and 29.5°F (-1.4°C). In Rockville, January is the coldest month, with temperatures averaging a high of 44.2°F (6.8°C) and a low of 29.5°F (-1.4°C). Weather in January »
Weather in February
February, the last month of the winter in Rockville, is another chilly month, with an average temperature ranging between max 49.1°F (9.5°C) and min 31.8°F (-0.1°C). Shifting into February, Rockville records an average high-temperature of a still frosty 49.1°F (9.5°C), presenting minor fluctuations compared to the previous month. Weather in February »
Weather in March
March, the first month of the spring in Rockville, is a mild month, with an average temperature ranging between max 55.9°F (13.3°C) and min 38.8°F (3.8°C). The shift from February to March is marked by a slight increase in the average high-temperature, moving from a chilly 49.1°F (9.5°C) to a mild 55.9°F (13.3°C). Weather in March »
Weather in April
April is an agreeable spring month in Rockville, Virginia, with an average temperature fluctuating between 49.1°F (9.5°C) and 68.2°F (20.1°C). April's onset is marked by a temperature increase, moving from a refreshing 55.9°F (13.3°C) in March to a pleasant 68.2°F (20.1°C). Weather in April »
Weather in May
May, the last month of the spring in Rockville, is a warm month, with an average temperature fluctuating between 78.1°F (25.6°C) and 58.1°F (14.5°C). May's onset brings a temperature rise, moving from a pleasant 68.2°F (20.1°C) in April to a moderately hot 78.1°F (25.6°C). Weather in May »
Weather in June
June, the first month of the summer in Rockville, is also a moderately hot month, with temperature in the range of an average high of 85.6°F (29.8°C) and an average low of 65.3°F (18.5°C). The commencement of June sees a minor shift in the average high-temperature, moving from 78.1°F (25.6°C) in May to a still moderately hot 85.6°F (29.8°C). Weather in June »
Weather in July
July is a tropical summer month in Rockville, Virginia, with an average temperature ranging between min 69.6°F (20.9°C) and max 90.7°F (32.6°C). The warmest temperatures occur during July, when averages reach a peak of 90.7°F (32.6°C) and a low of 69.6°F (20.9°C). The heat index for July is computed to be a scorching 105.8°F (41°C). Weather in July »
Weather in August
August, the last month of the summer in Rockville, is another tropical month, with an average temperature fluctuating between 88.3°F (31.3°C) and 68.2°F (20.1°C). August ushers in an average high-temperature of a still tropical 88.3°F (31.3°C), aligning closely with the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Rockville, Virginia, with temperature in the range of an average high of 81.3°F (27.4°C) and an average low of 62.6°F (17°C). With the arrival of September, Rockville notices a mild change in the average high-temperature, sliding from August's hot 88.3°F (31.3°C) to a warm 81.3°F (27.4°C). Weather in September »
Weather in October
October, the same as September, in Rockville, Virginia, is another pleasant autumn month, with an average temperature fluctuating between 69.3°F (20.7°C) and 51.8°F (11°C). October's arrival correlates with a reduction in the average high-temperature, down from a moderately hot 81.3°F (27.4°C) in September to an agreeable 69.3°F (20.7°C). Weather in October »
Weather in November
November, the last month of the autumn in Rockville, is also a moderate month, with an average temperature ranging between min 40.6°F (4.8°C) and max 56.7°F (13.7°C). Rockville in November experiences a subtle temperature decline, with average high-temperatures reducing from a pleasant 69.3°F (20.7°C) in October to a mild 56.7°F (13.7°C). Weather in November »
Weather in December
The first month of the winter, December, is also a frosty month in Rockville, Virginia, with an average temperature varying between 49.1°F (9.5°C) and 34.9°F (1.6°C). December implies a soft temperature shift, with average high-temperatures reducing from November's moderate 56.7°F (13.7°C) to a frosty 49.1°F (9.5°C). Weather in December »
[Resources]Frequently asked questions
What part of the year is the coldest in Rockville?
Rockville's coldest month, January, registers temperatures that range from a high of 44.2°F (6.8°C) to a low of 29.5°F (-1.4°C).
How many days does it rain in Rockville?
Throughout the year, in Rockville, Virginia, there are 151.1 rainfall days, and 26.22" (666mm) of precipitation is accumulated.
When does it snow in Rockville?
Months with snowfall are January through April, November and December.
How many days does it snow in Rockville?
In Rockville, during the entire year, snow falls for 10.5 days and aggregates up to 6.42" (163mm) of snow.
What are the months with the lowest UV index in Rockville?
The months with the lowest UV index in Rockville are January, February and December, with an average maximum UV index of 2.
When does it snow the most in Rockville?
February is the month with the most snowfall in Rockville. Snow falls for 3.5 days and accumulates 1.77" (45mm) of snow.
When is Daylight Saving Time (DST) in Rockville?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Rockville, 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.
When it does not snow in Rockville?
In Rockville, Virginia, snow does not fall in May through October.
When are the longest days in Rockville?
The month with the longest days in Rockville, Virginia, is June, with an average of 14h and 42min of daylight.
What are the warmest months in Rockville?
July, on average, is the warmest month in Rockville, Virginia, registering a high temperature of 90.7°F (32.6°C) and a low of 69.6°F (20.9°C).
What is the least humid month in Rockville?
With an average relative humidity of 68%, July is the least humid month.
What month has the most sunshine in Rockville?
With an average of 10.6h of sunshine, July has the most sunshine of the year.
What is the month with the highest UV index in Rockville?
The month with the highest UV index in Rockville is July, with an average maximum UV index of 7.
What is the wettest month in Rockville?
August is the month with the most rainfall in Rockville. Rain falls for 15.1 days and accumulates 2.72" (69mm) of precipitation.
What is the driest month in Rockville?
September is the month with the least rainfall in Rockville. Rain falls for 12.5 days and accumulates 1.65" (42mm) of precipitation.
What is the most humid month in Rockville?
December is the most humid month in Rockville, Virginia, with an average relative humidity of 78%.
What is the month with the shortest days in Rockville?
With an average of 9h and 36min of daylight, December has the shortest days of the year in Rockville.
What is the month with the least sunshine in Rockville?
The month with the least sunshine in Rockville, Virginia, is December, with an average of 5.2h of sunshine.
Average temperature
Rockville, VA
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (44.2°F).
The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).
Average pressure
Rockville, VA
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
30"Hg - Average pressure in May:
30.02"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.04"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.12"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
Rockville, VA
- Average wind speed in January:
6.6mph - Average wind speed in February:
6.8mph - Average wind speed in March:
7mph - Average wind speed in April:
7.4mph - Average wind speed in May:
6.3mph - Average wind speed in June:
5.9mph
- Average wind speed in July:
5.4mph - Average wind speed in August:
5.2mph - Average wind speed in September:
5.7mph - Average wind speed in October:
6.2mph - Average wind speed in November:
6.2mph - Average wind speed in December:
6mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity
Rockville, VA
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (68%).
Average rainfall
Rockville, VA
- Average rainfall in January:
1.89" - Average rainfall in February:
2.05" - Average rainfall in March:
2.32" - Average rainfall in April:
2.36" - Average rainfall in May:
2.36" - Average rainfall in June:
2.24"
- Average rainfall in July:
2.32" - Average rainfall in August:
2.72" - Average rainfall in September:
1.65" - Average rainfall in October:
2.2" - Average rainfall in November:
2.17" - Average rainfall in December:
1.93"
The wettest month (with the highest rainfall) is August (2.72").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days
Rockville, VA
- Average rainfall days in January:
9.6 days - Average rainfall days in February:
10.2 days - Average rainfall days in March:
14.1 days - Average rainfall days in April:
15 days - Average rainfall days in May:
16.6 days - Average rainfall days in June:
13.9 days
- Average rainfall days in July:
14.7 days - Average rainfall days in August:
15.1 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
8.8 days - Average rainfall days in December:
10.1 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is November (8.8 days).
Average snowfall
Rockville, VA
The month with the highest snowfall is February (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Rockville, VA
- Average snowfall days in January:
3.3 days - Average snowfall days in February:
3.5 days - Average snowfall days in March:
1.5 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:
0.4 days - Average snowfall days in December:
1.5 days
The month with the highest number of snowfall days is February (3.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Rockville, VA
- 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 1min - Average daylight in June:
14h and 4min
- Average daylight in July:
14h and 3min - 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 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
5h and 2min - Average sunshine in February:
5h and 2min - Average sunshine in March:
6h and 4min - Average sunshine in April:
9h and 1min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 2min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 1min - Average sunshine in September:
8h and 4min - 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: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days
Rockville, VA
- Average sunshine days in January:
18.4 days - Average sunshine days in February:
15.2 days - Average sunshine days in March:
14.6 days - Average sunshine days in April:
13.7 days - Average sunshine days in May:
11.9 days - Average sunshine days in June:
14.2 days
- Average sunshine days in July:
14.4 days - Average sunshine days in August:
13.3 days - Average sunshine days in September:
15.8 days - Average sunshine days in October:
18.5 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
19.2 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (11.9 days).
Average UV index
Rockville, VA
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover
Rockville, VA
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
Rockville, VA
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).
Rockville, Virginia, USA
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