Climate and monthly weather forecast
Roslyn Hills, VA

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Weather in January

January, like December, is another chilly winter month in Roslyn Hills, Virginia, with an average temperature ranging between max 44.2°F (6.8°C) and min 29.5°F (-1.4°C). January is the month when Roslyn Hills experiences its coldest 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 Roslyn Hills, is also a frosty month, with temperature in the range of an average low of 31.8°F (-0.1°C) and an average high of 49.1°F (9.5°C). The arrival of February sees an average high-temperature of a still frosty 49.1°F (9.5°C), hardly diverging from January's 44.2°F (6.8°C). Weather in February »

Weather in March

The first month of the spring, March, is a mild month in Roslyn Hills, Virginia, with temperature in the range of an average low of 38.8°F (3.8°C) and an average high of 55.9°F (13.3°C). Roslyn Hills's March weather indicates a minor increase in high-temperatures, edging from February's chilly 49.1°F (9.5°C) to a mild 55.9°F (13.3°C). Weather in March »

Weather in April

April is a pleasant spring month in Roslyn Hills, Virginia, with an average temperature fluctuating between 49.1°F (9.5°C) and 68.2°F (20.1°C). As Roslyn Hills welcomes April, the average high-temperature sees a rise, transitioning 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 Roslyn Hills, is a warm month, with temperature in the range of an average low of 58.1°F (14.5°C) and an average high of 78.1°F (25.6°C). In Roslyn Hills, the average high-temperature in May increases from an agreeable 68.2°F (20.1°C) in April to a moderately hot 78.1°F (25.6°C). Weather in May »

Weather in June

The first month of the summer, June, is still a warm month in Roslyn Hills, Virginia, with an average temperature ranging between min 65.3°F (18.5°C) and max 85.6°F (29.8°C). The start of June brings a subtle shift in the average high-temperature, edging up from May's 78.1°F (25.6°C) to a still moderately hot 85.6°F (29.8°C). Weather in June »

Weather in July

July is a hot summer month in Roslyn Hills, Virginia, with temperature in the range of an average high of 90.7°F (32.6°C) and an average low of 69.6°F (20.9°C). Roslyn Hills's temperatures peak on average in July, reaching 90.7°F (32.6°C) at their highest and 69.6°F (20.9°C) at their lowest. July's mean heat index is computed to be a scorching 105.8°F (41°C). Weather in July »

Weather in August

The last month of the summer, August, is also a hot month in Roslyn Hills, Virginia, with an average temperature fluctuating between 88.3°F (31.3°C) and 68.2°F (20.1°C). Roslyn Hills's transition from July to August introduces an average high-temperature of a still hot 88.3°F (31.3°C), marking an insignificant variation from the 90.7°F (32.6°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Roslyn Hills, 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). The start of September involves a subtle temperature drop, shifting from a hot 88.3°F (31.3°C) in August to a warm 81.3°F (27.4°C). Weather in September »

Weather in October

October, the same as September, in Roslyn Hills, Virginia, is another pleasant autumn month, with an average temperature varying between 51.8°F (11°C) and 69.3°F (20.7°C). Roslyn Hills, Virginia, observes a minor decrease in the average high-temperature with the arrival of October, falling from September's warm 81.3°F (27.4°C) to a pleasant 69.3°F (20.7°C). Weather in October »

Weather in November

The last month of the autumn, November, is another mild month in Roslyn Hills, Virginia, with an average temperature varying between 40.6°F (4.8°C) and 56.7°F (13.7°C). The decrease of average high-temperatures is mild in November, with a decline from an agreeable 69.3°F (20.7°C) in October to a refreshing 56.7°F (13.7°C). Weather in November »

Weather in December

December, the first month of the winter in Roslyn Hills, is still a chilly month, with temperature in the range of an average low of 34.9°F (1.6°C) and an average high of 49.1°F (9.5°C). The onset of December brings a small shift in high-temperatures, falling from a refreshing 56.7°F (13.7°C) in November to a chilly 49.1°F (9.5°C). Weather in December »

Frequently asked questions

What is the coldest month?

January is the month when Roslyn Hills, Virginia, sees the average lowest temperatures, with a high of 44.2°F (6.8°C) and a low of 29.5°F (-1.4°C).

How many days does it rain?

In Roslyn Hills, during the entire year, the rain falls for 151.1 days and collects up to 26.22" (666mm) of precipitation.

When does it snow?

January through April, November and December are months with snowfall.

How many days does it snow?

Throughout the year, there are 10.5 snowfall days, and 6.42" (163mm) of snow is accumulated.

What is the month with the lowest UV index?

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

When does it snow the most?

February is the month with the most snowfall. Snow falls for 3.5 days and accumulates 1.77" (45mm) of snow.

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.

When it does not snow?

In Roslyn Hills, snow does not fall in May through October.

When are the longest days?

With an average of 14h and 42min of daylight, June has the longest days of the year.

What are the warmest months?

July is the month that records the highest temperatures, with averages ranging from a high of 90.7°F (32.6°C) to a low of 69.6°F (20.9°C).

What is the least humid month?

July is the least humid month, with an average relative humidity of 68%.

What month has the most sunshine?

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?

The month with the highest UV index is July, with an average maximum UV index of 7.

What is the wettest month?

August is the month with the most rainfall in Roslyn Hills. Rain falls for 15.1 days and accumulates 2.72" (69mm) of precipitation.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 1.65" (42mm) of precipitation.

What is the most humid month?

December is the most humid month, with an average relative humidity of 78%.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 36min of daylight.

What is the month with the least sunshine?

December has the least sunshine of the year, with an average of 5.2h of sunshine.

Average temperature
Roslyn Hills, VA

Average temperature - Roslyn Hills, 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
Roslyn Hills, VA

Average pressure - Roslyn Hills, VA

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
Roslyn Hills, VA

Average wind speed - Roslyn Hills, VA

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
Roslyn Hills, VA

Average humidity - Roslyn Hills, VA

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (68%).

Average rainfall
Roslyn Hills, VA

Average rainfall - Roslyn Hills, VA

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
Roslyn Hills, VA

Average rainfall days - Roslyn Hills, VA

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
Roslyn Hills, VA

Average snowfall - Roslyn Hills, 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
Roslyn Hills, VA

Average snowfall days - Roslyn Hills, VA

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
Roslyn Hills, VA

Average daylight / Average sunshine - Roslyn Hills, VA

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).

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
Roslyn Hills, VA

Average sunshine days - Roslyn Hills, VA

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
Roslyn Hills, VA

Average UV index - Roslyn Hills, 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 visibility
Roslyn Hills, VA

Average visibility - Roslyn Hills, 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).

Roslyn Hills, Virginia, USA

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