Richmond
Virginia, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
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
September, the first month of the autumn, in Richmond, is also a moderately hot month, with average temperature ranging between min 60.1°F (15.6°C) and max 81.1°F (27.3°C).

Temperature

In September, the average high-temperature slightly decreases, from a hot 87.6°F (30.9°C) in August, to a warm 81.1°F (27.3°C). In Richmond, Virginia, in September, the average low-temperature is 60.1°F (15.6°C).

Humidity

In Richmond, the average relative humidity is 77%.

Rainfall

In Richmond, during 8.4 rainfall days, 4.1" (104.9mm) of precipitation is typically accumulated. Throughout the year, in Richmond, there are 114 rainfall days, and 43.6" (1107.5mm) of precipitation is accumulated.

Snowfall

Throughout the year, in Richmond, 10.3" (261.6mm) of snow is accumulated.

Daylight

The average length of the day is 12.4h.

Sunshine

The average sunshine in Richmond, Virginia, is 7.9h.

UV index

In September, the average daily maximum UV index in Richmond, Virginia, is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to the Sun's UV rays for ordinary individuals.
The average daily UV index of 7 transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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.

What is the temperature in September in Richmond?

In Richmond, Virginia, in September, the average high-temperature is 81.1°F (27.3°C), and the average low-temperature is 60.1°F (15.6°C).

What is the average humidity in September in Richmond?

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

How much does it rain in Richmond in September?

In Richmond, Virginia, in September, during 8.4 rainfall days, 4.1" (104.9mm) of precipitation is typically accumulated.

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

In Richmond, Virginia, the average length of the day in September is 12.4h.

How long on average sun shines in September in Richmond?

In Richmond, Virginia, the average sunshine in September is 7.9h.

How high is the UV index in September in Richmond?

In Richmond, Virginia, the average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to the UV radiation.
Average temperature in September - Richmond, VA
  • Average high temperature in September: 27.3°C

The warmest month (with the highest average high temperature) is July (32.1°C).
The month with the lowest average high temperature is January (8.6°C).

  • Average low temperature in September: 15.6°C

The month with the highest average low temperature is July (20.5°C).
The coldest month (with the lowest average low temperature) is January (-2.1°C).

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

The month with the highest relative humidity is August (77.2%).
The month with the lowest relative humidity is April (60.8%).

Average rainfall in September - Richmond, VA
  • Average rainfall in September: 104.9mm

The wettest month (with the highest rainfall) is August (118.4mm).
The driest month (with the lowest rainfall) is February (70.1mm).

Average rainfall days in September - Richmond, VA
  • Average rainfall days in September: 8.4 days

The month with the highest number of rainy days is July (11.4 days).
The month with the lowest number of rainy days is October (7.4 days).

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

The month with the highest snowfall is January (99.1mm).
Months with the lowest snowfall are May, June, July, August, September and October (0mm).

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

Months with the highest number of snowfall days are January and February (1.9 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Richmond, VA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.6h).

  • Average sunshine in September: 7.9h

The month with most sunshine is June (Average sunshine: 10.2h).
The month with least sunshine is December (Average sunshine: 5.3h).

Average UV index in September - Richmond, VA
  • Average UV index in September: 7

Months with the highest UV index are June, July and August (UV index 9).
Months with the lowest UV index are January and December (UV index 2).