September weather forecast
Slate, VA

Weather in September

September, the first month of the autumn in Slate, is still a warm month, with an average temperature varying between 53.6°F (12°C) and 76.1°F (24.5°C).

Temperature

In Slate, the average high-temperature in September marginally drops from a moderately hot 81.7°F (27.6°C) in August to a still warm 76.1°F (24.5°C). In Slate, the average low-temperature is 53.6°F (12°C).

Humidity

The average relative humidity in September is 78%.

Rainfall

September is the month with the least rainfall. 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 Slate, the average length of the day in September 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 7:22 am and sunset at 7:12 pm EDT.

Sunshine

In September, the average sunshine is 8.4h.

UV index

In Slate, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Slate?

In Slate, in September, the average high-temperature is 76.1°F (24.5°C), and the average low-temperature is 53.6°F (12°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, in August is computed to be 87.8°F (31°C).

What is the average humidity in September in Slate?

In Slate, the average relative humidity in September is 78%.

What is the driest month in Slate?

The month with the least rainfall in Slate, Virginia, is September, when the rain falls for 13.2 days and typically collects 1.14" (29mm) of precipitation.

How many days does it rain in September in Slate?

In Slate, during September, the rain falls for 13.2 days and regularly aggregates up to 1.14" (29mm) of precipitation.

When it does not snow in Slate?

June through September are months without snowfall.

Does it snow in Slate in September?

In Slate, Virginia, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Slate?

In Slate, Virginia, the average day length in September is 12h and 25min.

What time are sunrise and sunset in September in Slate?

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 7:22 am and sunset at 7:12 pm EDT.

How many hours of sunshine does Slate have in September?

In Slate, Virginia, the average sunshine duration in September is 8.4h.

How high is the UV index in September in Slate?

In Slate, Virginia, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Slate, VA

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).

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Average pressure in September
Slate, VA

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).

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Average wind speed in September
Slate, VA

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).

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Average humidity in September
Slate, VA

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%).

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Average rainfall in September
Slate, VA

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").

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Average rainfall days in September
Slate, VA

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).

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Average snowfall in September
Slate, VA

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").

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Average snowfall days in September
Slate, VA

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).

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Average daylight in September /
Average sunshine in September
Slate, VA

Average daylight in September / Average sunshine in September - Slate, VA
  • Average daylight in September: 12h and 25min

The month with the longest days is June (Average daylight: 14h and 41min).
The month with the shortest days is December (Average daylight: 9h and 38min).

  • Average sunshine in September: 8h and 24min

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).

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Average sunshine days in September
Slate, VA

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).

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Average UV index in September
Slate, VA

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).

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Average cloud cover in September
Slate, VA

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).

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Average visibility in September
Slate, VA

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).

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