Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
In September, Grays experiences a minor shift in meteorological conditions with average high-temperatures marked at a still moderately hot 79.5°F (26.4°C), closely mirroring the climate in August. Grays in September observes a sharp transition from the daytime heat, falling to an average low of 56.3°F (13.5°C).Humidity
The months with the lowest humidity are June through September and November, with an average relative humidity of 75%.Rainfall
The month with the least rainfall in Grays is September, when the rain falls for 14 days and typically collects 1.57" (40mm) of precipitation.Snowfall
In Grays, snow does not fall in May through September.Daylight
In September, the average length of the day in Grays, Virginia, is 12h and 24min.On the first day of September in Grays, sunrise is at 7:01 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 7:14 pm EDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. It's recommended to limit sun exposure when its radiation is at its peak during midday. Stay sun-safe with clothing that is both closely woven and worn loosely.
Frequently asked questions
What are the temperatures in Grays in September?
What are the least humid months in Grays?
What is the average humidity in September in Grays?
What is the driest month in Grays?
How many days does it rain in September in Grays?
When it does not snow in Grays?
Does it snow in Grays in September?
What is the average length of the day in September in Grays?
When are sunrise and sunset in September in Grays?
How many hours of sunshine does Grays have in September?
What is the UV index reading in September in Grays?
Average temperature in September
Grays, VA
- Average high temperature in September: 79.5°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (42.1°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (27.1°F).
Average pressure in September
Grays, VA
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in September
Grays, VA
- Average wind speed in September: 4mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in September
Grays, VA
- Average humidity in September: 75%
The months with the highest relative humidity are February and December (79%).
The months with the lowest relative humidity are June, July, August, September and November (75%).
Average rainfall in September
Grays, VA
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is February (3.82").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in September
Grays, VA
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is November (11.6 days).
Average snowfall in September
Grays, VA
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Grays, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grays, VA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in September
Grays, VA
- Average sunshine days in September: 13.2 days
The months with the most sunshine days are October and November (16.3 days).
The month with the least sunshine days is February (9.1 days).
Average UV index in September
Grays, VA
- Average UV index in September: 4
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 and December (UV index 2).
Average cloud cover in September
Grays, VA
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Grays, VA
- Average visibility in September: 6mi
The months with the highest visibility are April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March, May and December (5mi).
Grays, Virginia, USA
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