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
September ushers in a minor alteration in Slate's climate, with the average high-temperature moving from August's 81.7°F (27.6°C) to a still warm 76.1°F (24.5°C). Slate anticipates a pronounced temperature drop from daily highs during the nights of September, with an average low of 53.6°F (12°C).Humidity
In Slate, Virginia, the average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall in Slate. Rain falls for 13.2 days and accumulates 1.14" (29mm) of precipitation.Snowfall
In Slate, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 25min.On the first day of September, sunrise is at 6:58 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:12 pm EDT.
Sunshine
In Slate, the average sunshine in September is 8.4h.UV index
The average daily maximum UV index in September in Slate 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: In September, a regular UV index of 4 translates into these guidelines:
Undertake precautions - Obligation exists to protect against skin and eye damage. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Frequently asked questions
What is the average September temperature in Slate?
What is the average humidity in September in Slate?
What is the driest month in Slate?
How many days does it rain in September in Slate?
When it does not snow in Slate?
Does it snow in Slate in September?
How many hours of daylight does Slate have in September?
When are sunrise and sunset in September in Slate?
How many hours of sunshine does Slate have in September?
How high is the UV index in September in Slate?
Average temperature in September
Slate, VA
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in September: 53.6°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (24.4°F).
Average pressure in September
Slate, 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
Slate, VA
- Average wind speed in September: 4.5mph
The windiest months (with the highest average wind speed) are January, February and April (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Slate, VA
- Average humidity in September: 78%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
Slate, VA
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is February (2.72").
The driest month (with the least rainfall) is September (1.14").
Average rainfall days in September
Slate, VA
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in September
Slate, VA
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Slate, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Slate, VA
- Average daylight in September: 12h and 2min
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 September: 8h and 2min
The months with the most sunshine are June, July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Slate, VA
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is October (18.3 days).
The month with the least sunshine days is May (10.3 days).
Average UV index in September
Slate, VA
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Slate, VA
- Average cloud cover in September: 39
The months with the most cloud cover are January and February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in September
Slate, VA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
Slate, Virginia, USA
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