Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average snowfall in October
- Average snowfall days in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
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). During October, Roslyn Hills's temperature averages to a fresh 51.8°F (11°C) at night.Humidity
In October, the average relative humidity is 75%.Rainfall
In Roslyn Hills, in October, it is raining for 10.5 days, with typically 2.2" (56mm) of accumulated precipitation. Throughout the year, there are 151.1 rainfall days, and 26.22" (666mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In Roslyn Hills, the average length of the day in October is 11h and 13min.On the first day of the month, sunrise is at 7:06 am and sunset at 6:52 pm. On the last day of October, sunrise is at 7:34 am and sunset at 6:12 pm EDT.
Sunshine
In Roslyn Hills, the average sunshine in October is 5.7h.UV index
The average daily maximum UV index in October is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 4 in October translates into this advice:
Ensure safety - Sun damage prevention is strongly urged. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are October temperatures?
What is the average humidity in October?
How much does it rain in October?
When it does not snow?
Does it snow in Roslyn Hills in October?
How many hours of daylight does Roslyn Hills have in October?
When is the sunrise / sunset in October?
How many hours of sunshine does Roslyn Hills have in October?
How high is the UV index in October?
Average temperature in October
Roslyn Hills, VA
- Average high temperature in October: 69.3°F
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).
- Average low temperature in October: 51.8°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 in October
Roslyn Hills, VA
- Average pressure in October: 30.04"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 in October
Roslyn Hills, VA
- Average wind speed in October: 6.2mph
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 in October
Roslyn Hills, VA
- Average humidity in October: 75%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (68%).
Average rainfall in October
Roslyn Hills, VA
- Average rainfall in October: 2.2"
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 in October
Roslyn Hills, VA
- Average rainfall days in October: 10.5 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 in October
Roslyn Hills, VA
- Average snowfall in October: 0"
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 in October
Roslyn Hills, VA
- Average snowfall days in October: 0 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 in October /
Average sunshine in October
Roslyn Hills, VA
- Average daylight in October: 11h and 1min
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 October: 5h and 4min
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 in October
Roslyn Hills, VA
- Average sunshine days in October: 18.5 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 in October
Roslyn Hills, VA
- Average UV index in October: 4
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 in October
Roslyn Hills, VA
- Average cloud cover in October: 38
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 in October
Roslyn Hills, VA
- Average visibility in October: 6mi
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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