September weather forecast
Unison, VA

Weather in September

The first month of the autumn, September, is still a warm month in Unison, Virginia, with temperature in the range of an average high of 77.4°F (25.2°C) and an average low of 58.3°F (14.6°C).

Temperature

In Unison, the average high-temperature in September marginally drops from 84.6°F (29.2°C) in August to a still warm 77.4°F (25.2°C). In Unison, in September, the average low-temperature is 58.3°F (14.6°C).

Humidity

In September, the average relative humidity in Unison is 77%.

Rainfall

The month with the least rainfall is September, when the rain falls for 13.7 days and typically collects 1.93" (49mm) of precipitation.

Snowfall

May through September are months without snowfall in Unison.

Daylight

In Unison, the average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:40 am and sunset at 7:42 pm. On the last day of September, in Unison, sunrise is at 7:06 am and sunset at 6:55 pm EDT.

Sunshine

In Unison, the average sunshine in September is 8.9h.

UV index

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in September in Unison?

In September, the average relative humidity in Unison is 77%.

What is the driest month in Unison?

The month with the least rainfall is September, when the rain falls for 13.7 days and typically collects 1.93" (49mm) of precipitation.

How much does it rain in Unison in September?

In Unison, during September, the rain falls for 13.7 days and regularly aggregates up to 1.93" (49mm) of precipitation.

When it does not snow in Unison?

In Unison, Virginia, snow does not fall in May through September.

Does it snow in Unison in September?

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

How many hours of daylight does Unison have in September?

In Unison, the average day length in September is 12h and 26min.

When are sunrise and sunset in September in Unison?

On the first day of September in Unison, Virginia, sunrise is at 6:40 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:55 pm EDT.

How long on average sun shines in September in Unison?

The average sunshine duration in September in Unison, Virginia, is 8.9h.

How high is the UV index in September in Unison?

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Unison, VA

Average temperature in September - Unison, VA
  • Average high temperature in September: 77.4°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (38.7°F).

  • Average low temperature in September: 58.3°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).

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Average pressure in September
Unison, VA

Average pressure in September - Unison, VA
  • Average pressure in September: 30.06"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).

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Average wind speed in September
Unison, VA

Average wind speed in September - Unison, VA
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is March (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).

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Average humidity in September
Unison, VA

Average humidity in September - Unison, VA
  • Average humidity in September: 77%

The months with the highest relative humidity are October and December (78%).
The month with the lowest relative humidity is July (73%).

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Average rainfall in September
Unison, VA

Average rainfall in September - Unison, VA
  • Average rainfall in September: 1.93"

The wettest months (with the highest rainfall) are May and August (3.35").
The driest month (with the least rainfall) is September (1.93").

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Average rainfall days in September
Unison, VA

Average rainfall days in September - Unison, VA
  • Average rainfall days in September: 13.7 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (10.1 days).

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Average snowfall in September
Unison, VA

Average snowfall in September - Unison, VA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (4.17").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Unison, VA

Average snowfall days in September - Unison, VA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Unison, VA
  • Average daylight in September: 12h and 26min

The month with the longest days is June (Average daylight: 14h and 52min).
The month with the shortest days is December (Average daylight: 9h and 29min).

  • Average sunshine in September: 8h and 54min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 6min).

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Average sunshine days in September
Unison, VA

Average sunshine days in September - Unison, VA
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is May (11.1 days).

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Average UV index in September
Unison, VA

Average UV index in September - Unison, 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, November and December (UV index 2).

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Average cloud cover in September
Unison, VA

Average cloud cover in September - Unison, VA
  • Average cloud cover in September: 36

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).

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Average visibility in September
Unison, VA

Average visibility in September - Unison, VA
  • Average visibility in September: 5mi

The months with the highest visibility are February, March, April, June, July, August and November (6mi).
The months with the lowest visibility are January, May, September, October and December (5mi).

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