September weather forecast
Mount Trimble, WV

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Weather in September

The first month of the autumn, September, is still a warm month in Mount Trimble, West Virginia, with temperature in the range of an average low of 54.5°F (12.5°C) and an average high of 75.6°F (24.2°C).

Temperature

The onset of September results in a small decrease in the average high-temperature, moderately receding from 82.9°F (28.3°C) in August to a still warm 75.6°F (24.2°C). In the month of September, the average low-temperature usually rests at a cool 54.5°F (12.5°C).

Humidity

The average relative humidity in September is 78%.

Rainfall

In Mount Trimble, in September, it is raining for 13 days, with typically 1.81" (46mm) of accumulated precipitation. In Mount Trimble, during the entire year, the rain falls for 158.9 days and collects up to 26.1" (663mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of September, sunrise is at 6:41 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:56 pm EDT.

Sunshine

In Mount Trimble, the average sunshine in September is 8.8h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 4 in September transforms into the following instructions:
Undertake precautions - Guarding against sun damage is counselled. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.

Frequently asked questions

What are September temperatures in Mount Trimble?

In Mount Trimble, in September, the average high-temperature is 75.6°F (24.2°C), and the average low-temperature is 54.5°F (12.5°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, in August is appraised at 89.6°F (32°C).

What is the average humidity in September?

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

How many days does it rain in September in Mount Trimble?

In Mount Trimble, in September, during 13 rainfall days, 1.81" (46mm) of precipitation is typically accumulated.

When it does not snow?

In Mount Trimble, snow does not fall in May through October.

How many hours of daylight does Mount Trimble have in September?

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

When are sunrise and sunset in September?

On the first day of September, sunrise is at 6:41 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:56 pm EDT.

How many hours of sunshine does Mount Trimble have in September?

In Mount Trimble, the average sunshine duration in September is 8.8h.

What is the UV index reading in September?

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 daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Mount Trimble, WV

Average temperature in September - Mount Trimble, WV
  • Average high temperature in September: 75.6°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in September: 54.5°F

The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

Average pressure in September
Mount Trimble, WV

Average pressure in September - Mount Trimble, WV
  • 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).

Average wind speed in September
Mount Trimble, WV

Average wind speed in September - Mount Trimble, WV
  • Average wind speed in September: 4.6mph

The windiest months (with the highest average wind speed) are January and February (7.2mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

Average humidity in September
Mount Trimble, WV

Average humidity in September - Mount Trimble, WV
  • Average humidity in September: 78%

The months with the highest relative humidity are February, October and December (79%).
The months with the lowest relative humidity are April and July (74%).

Average rainfall in September
Mount Trimble, WV

Average rainfall in September - Mount Trimble, WV
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is November (1.69").

Average rainfall days in September
Mount Trimble, WV

Average rainfall days in September - Mount Trimble, WV
  • Average rainfall days in September: 13 days

The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is November (9.3 days).

Average snowfall in September
Mount Trimble, WV

Average snowfall in September - Mount Trimble, WV
  • Average snowfall in September: 0"

The month with the highest snowfall is February (3.9").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Mount Trimble, WV

Average snowfall days in September - Mount Trimble, WV
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (7.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Mount Trimble, WV

Average daylight in September / Average sunshine in September - Mount Trimble, WV
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).

Average sunshine days in September
Mount Trimble, WV

Average sunshine days in September - Mount Trimble, WV
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (10.7 days).

Average UV index in September
Mount Trimble, WV

Average UV index in September - Mount Trimble, WV
  • Average UV index in September: 4

The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September
Mount Trimble, WV

Average cloud cover in September - Mount Trimble, WV
  • Average cloud cover in September: 37

The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 30).

Average visibility in September
Mount Trimble, WV

Average visibility in September - Mount Trimble, WV
  • Average visibility in September: 5mi

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

Mount Trimble, West Virginia, USA

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