Climate and monthly weather forecast
Rockville, MD

Weather in January

January, the same as December, is a wintry winter month in Rockville, Maryland, with an average temperature varying between 26.2°F (-3.2°C) and 39°F (3.9°C). January is the coldest month, with an average high-temperature of 39°F (3.9°C) and an average low-temperature of 26.2°F (-3.2°C). Weather in January »

Weather in February

February, the last month of the winter in Rockville, is a chilly month, with an average temperature ranging between min 28.6°F (-1.9°C) and max 43.9°F (6.6°C). In Rockville, the average high-temperature in February is almost the same as in January - a chilly 43.9°F (6.6°C). Weather in February »

Weather in March

The first month of the spring, March, is a cool month in Rockville, Maryland, with an average temperature ranging between min 36.1°F (2.3°C) and max 52°F (11.1°C). In March, the average high-temperature slightly increases 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 in Rockville, Maryland, is an enjoyable spring month, with temperature in the range of an average high of 64.4°F (18°C) and an average low of 45.9°F (7.7°C). In April, the average high-temperature increases from a cool 52°F (11.1°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 Rockville, Maryland, with temperature in the range of an average low of 55.4°F (13°C) and an average high of 73.9°F (23.3°C). In May, the average high-temperature rises from an enjoyable 64.4°F (18°C) in April to a warm 73.9°F (23.3°C). Weather in May »

Weather in June

The first month of the summer, June, is also a moderately hot month in Rockville, Maryland, with an average temperature varying between 63.7°F (17.6°C) and 82°F (27.8°C). In Rockville, Maryland, the average high-temperature in June marginally rises from 73.9°F (23.3°C) in May to a still warm 82°F (27.8°C). Weather in June »

Weather in July

July in Rockville, Maryland, is a hot summer month, with an average temperature fluctuating between 87.1°F (30.6°C) and 68.5°F (20.3°C). The warmest month is July, with an average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 68.5°F (20.3°C). The average heat index in July is calculated to be a sweltering 97.7°F (36.5°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Rockville, Maryland, with an average temperature fluctuating between 67.5°F (19.7°C) and 85.3°F (29.6°C). In August, the average high-temperature is almost the same as in July - a warm 85.3°F (29.6°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Rockville, Maryland, with temperature in the range of an average low of 60.8°F (16°C) and an average high of 77.9°F (25.5°C). In Rockville, the average high-temperature in September marginally drops from 85.3°F (29.6°C) in August to a still warm 77.9°F (25.5°C). Weather in September »

Weather in October

October, like September, in Rockville, Maryland, is another enjoyable autumn month, with temperature in the range of an average high of 65.5°F (18.6°C) and an average low of 49.8°F (9.9°C). In October, the average high-temperature decreases from a warm 77.9°F (25.5°C) in September to a comfortable 65.5°F (18.6°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a fresh month in Rockville, Maryland, with an average temperature fluctuating between 38.5°F (3.6°C) and 53.4°F (11.9°C). In November, the average high-temperature drops from a comfortable 65.5°F (18.6°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 Rockville, is still a chilly month, with an average temperature fluctuating between 32.9°F (0.5°C) and 45.3°F (7.4°C). In Rockville, the average high-temperature in December marginally drops from a fresh 53.4°F (11.9°C) in November to a chilly 45.3°F (7.4°C). Weather in December »
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FAQ

What is the coldest month in Rockville?

The coldest month is January, with an average high-temperature of 39°F (3.9°C) and an average low-temperature of 26.2°F (-3.2°C).

What is the driest month in Rockville?

The month with the least rainfall in Rockville, Maryland, is January, when the rain falls for 9.6 days and typically collects 1.97" (50mm) of precipitation.

How much does it rain in Rockville?

Throughout the year, in Rockville, there are 156.4 rainfall days, and 30.79" (782mm) of precipitation is accumulated.

When does it snow in Rockville?

Months with snowfall in Rockville, Maryland, are January through April, November and December.

How much does it snow in Rockville?

Throughout the year, there are 17.7 snowfall days, and 9.92" (252mm) of snow is accumulated.

What is the month with the least sunshine in Rockville?

The months with the least sunshine are January, February and December, with an average of 5.1h of sunshine.

What is the month with the lowest UV index in Rockville?

The months with the lowest UV index in Rockville, Maryland, are January, February, November and December, with an average maximum UV index of 2.

What is the snowiest month in Rockville?

March is the month with the most snowfall in Rockville, Maryland. Snow falls for 3.2 days and accumulates 3.03" (77mm) of snow.

When is Daylight Saving Time (DST) in Rockville?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from EDT to EST.

When it does not snow in Rockville?

In Rockville, snow does not fall in May through October.

What are the months with the highest UV index in Rockville?

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

When are the longest days in Rockville?

The month with the longest days in Rockville, Maryland, is June, with an average of 14h and 52min of daylight.

What is the warmest month in Rockville?

With an average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 68.5°F (20.3°C), July is the warmest month in Rockville, Maryland.

What is the least humid month in Rockville?

With an average relative humidity of 70%, July is the least humid month.

What month has the most sunshine in Rockville?

July has the most sunshine of the year, with an average of 10.8h of sunshine.

What is the wettest month in Rockville?

The month with the most rainfall in Rockville is August, when the rain falls for 15.9 days and typically aggregates up to 3.9" (99mm) of precipitation.

What is the most humid month in Rockville?

December is the most humid month in Rockville, Maryland, with an average relative humidity of 77%.

What is the month with the shortest days in Rockville?

With an average of 9h and 29min of daylight, December has the shortest days of the year in Rockville.

Average temperature
Rockville, MD

Average temperature - Rockville, MD

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (39°F).

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).

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Average pressure
Rockville, MD

Average pressure - Rockville, MD

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed
Rockville, MD

Average wind speed - Rockville, MD

The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5mph).

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Average rainfall
Rockville, MD

Average rainfall - Rockville, MD

The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is January (1.97").

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Average rainfall days
Rockville, MD

Average rainfall days - Rockville, MD

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is November (9.2 days).

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Average snowfall
Rockville, MD

Average snowfall - Rockville, MD

The month with the highest snowfall is March (3.03").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days
Rockville, MD

Average snowfall days - Rockville, MD

The months with the highest number of snowfall days are January and February (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight / Average sunshine
Rockville, MD

Average daylight / Average sunshine - Rockville, MD

The month with the longest days is June (Average daylight: 14h and 52min).
The month with the shortest days is December (Average daylight: 9h and 29min).

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 6min).

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Average sunshine days
Rockville, MD

Average sunshine days - Rockville, MD

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (12 days).

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Average UV index
Rockville, MD

Average UV index - Rockville, 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, February, November and December (UV index 2).

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Average visibility
Rockville, MD

Average visibility - Rockville, 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).

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