Climate and monthly weather forecastRoslyn Hills, VA
Climate and monthly weather forecast
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 »Updated: Aug 2, 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
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).
In Roslyn Hills, during the entire year, the rain falls for 151.1 days and collects up to 26.22" (666mm) of precipitation.
January through April, November and December are months with snowfall.
Throughout the year, there are 10.5 snowfall days, and 6.42" (163mm) of snow is accumulated.
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2.
February is the month with the most snowfall. Snow falls for 3.5 days and accumulates 1.77" (45mm) of snow.
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 Roslyn Hills, snow does not fall in May through October.
With an average of 14h and 42min of daylight, June has the longest days of the year.
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).
July is the least humid month, with an average relative humidity of 68%.
With an average of 10.6h of sunshine, July has the most sunshine of the year.
The month with the highest UV index is July, with an average maximum UV index of 7.
August is the month with the most rainfall in Roslyn Hills. Rain falls for 15.1 days and accumulates 2.72" (69mm) of precipitation.
The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 1.65" (42mm) of precipitation.
December is the most humid month, with an average relative humidity of 78%.
The month with the shortest days is December, with an average of 9h and 36min of daylight.
December has the least sunshine of the year, with an average of 5.2h of sunshine.
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 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
Roslyn Hills, 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
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 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
Roslyn Hills, 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
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 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
Roslyn Hills, VA
- Average daylight in January:
9h and 54min - 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 12min - Average daylight in June:
14h and 42min
- Average daylight in July:
14h and 30min - 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 12min - Average daylight in December:
9h and 36min
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 24min - Average sunshine in February:
5h and 18min - Average sunshine in March:
6h and 36min - Average sunshine in April:
9h and 6min - Average sunshine in May:
9h and 12min - Average sunshine in June:
10h and 24min
- Average sunshine in July:
10h and 36min - Average sunshine in August:
10h and 12min - Average sunshine in September:
8h and 42min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 54min - Average sunshine in December:
5h and 12min
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 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
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 cloud cover
Roslyn Hills, 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
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).
