September weather forecast
Richmond, VA

River James in Richmond, Virginia overlooking the lit city buildings at dusk
River James in Richmond, Virginia overlooking the lit city buildings at dusk

Weather in September

The first month of the autumn, September, is still a warm month in Richmond, Virginia, with temperature in the range of an average high of 81.3°F (27.4°C) and an average low of 63.1°F (17.3°C).

Temperature

In Richmond, the average high-temperature in September marginally drops from a hot 88.3°F (31.3°C) in August to a warm 81.3°F (27.4°C). In September, in Richmond, the average low-temperature is 63.1°F (17.3°C).

Heat index

The average heat index in September is computed to be 85.8°F (29.9°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, pregnancy, metabolic differences), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

The average relative humidity in September is 73%.

Rainfall

September is the month with the least rainfall in Richmond. Rain falls for 11.2 days and accumulates 1.73" (44mm) of precipitation.

Snowfall

In Richmond, snow does not fall in May through October.

Daylight

The average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 6:40 am and sunset at 7:39 pm. On the last day of September, in Richmond, sunrise is at 7:04 am and sunset at 6:54 pm EDT.

Sunshine

The average sunshine in September in Richmond is 8.6h.

UV index

In Richmond, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 Richmond?

The average high-temperature, in September, is 81.3°F (27.4°C), while the average low-temperature is 63.1°F (17.3°C). In September, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, is computed to be 85.8°F (29.9°C).

What is the average humidity in September in Richmond?

In September, the average relative humidity in Richmond is 73%.

What is the driest month in Richmond?

The month with the least rainfall in Richmond is September, when the rain falls for 11.2 days and typically collects 1.73" (44mm) of precipitation.

How much does it rain in Richmond in September?

In Richmond, Virginia, in September, it is raining for 11.2 days, with typically 1.73" (44mm) of accumulated precipitation.

When it does not snow in Richmond?

In Richmond, Virginia, snow does not fall in May through October.

How many hours of daylight does Richmond have in September?

The average day length in September is 12h and 25min.

When are sunrise and sunset in September in Richmond?

In September, on the first day of the month, sunrise is at 6:40 am and sunset at 7:39 pm. On the last day of the month, in Richmond, sunrise is at 7:04 am and sunset at 6:54 pm EDT.

How many hours of sunshine does Richmond have in September?

In Richmond, the average sunshine duration in September is 8.6h.

What is the UV index reading in September in Richmond?

In Richmond, Virginia, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
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
Richmond, VA

Average temperature in September - Richmond, VA
  • Average high temperature in September: 81.3°F

The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (44.6°F).

  • Average low temperature in September: 63.1°F

The month with the highest average low temperature is July (70.2°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).

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Average pressure in September
Richmond, VA

Average pressure in September - Richmond, VA
  • Average pressure in September: 30.04"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
Richmond, VA

Average wind speed in September - Richmond, VA
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in September
Richmond, VA

Average humidity in September - Richmond, VA
  • Average humidity in September: 73%

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (68%).

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Average rainfall in September
Richmond, VA

Average rainfall in September - Richmond, VA
  • Average rainfall in September: 1.73"

The wettest month (with the highest rainfall) is August (2.87").
The driest month (with the least rainfall) is September (1.73").

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Average rainfall days in September
Richmond, VA

Average rainfall days in September - Richmond, VA
  • Average rainfall days in September: 11.2 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is November (9.7 days).

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Average snowfall in September
Richmond, VA

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

The month with the highest snowfall is January (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Richmond, VA

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

The month with the highest number of snowfall days is January (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 43min).
The month with the shortest days is December (Average daylight: 9h and 37min).

  • Average sunshine in September: 8h and 36min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).

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Average sunshine days in September
Richmond, VA

Average sunshine days in September - Richmond, VA
  • Average sunshine days in September: 17.8 days

The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is May (12.1 days).

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Average UV index in September
Richmond, VA

Average UV index in September - Richmond, VA
  • Average UV index in September: 5

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in September
Richmond, VA

Average cloud cover in September - Richmond, VA
  • Average cloud cover in September: 39

The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 32).

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Average visibility in September
Richmond, VA

Average visibility in September - Richmond, VA
  • Average visibility in September: 6mi

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

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