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

Temperature

In September, the average high-temperature marginally drops, from a tropical 87.6°F (30.9°C) in August, to a moderately hot 81.1°F (27.3°C). The average low-temperature, in Richmond, is 60.1°F (15.6°C).

Heat index

In September, the average heat index is calculated to a hot 86.2°F (30.1°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, metabolic differences, wind), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. 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

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

Rainfall

In Richmond, during September, the rain falls for 8.4 days and regularly aggregates up to 4.1" (104.9mm) of precipitation. Throughout the year, in Richmond, there are 114 rainfall days, and 43.6" (1107.5mm) of precipitation is accumulated.

Snowfall

In Richmond snow does not fall in May through October.

Daylight

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

Sunshine

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

UV index

In Richmond, the average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 7 in September interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for 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.

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). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that calculates temperature value influenced by the moisture in the air, in September is appraised at 86.2°F (30.1°C).

What is the average humidity in September in Richmond?

The average relative humidity in September in Richmond is 77%.

How many days does it rain in September in Richmond?

In Richmond, during September, the rain falls for 8.4 days and regularly aggregates up to 4.1" (104.9mm) of precipitation.

When it does not snow in Richmond?

May through October are months without snowfall in Richmond, Virginia.

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

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

How long on average sun shines in September in Richmond?

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

What is the UV index intensity in September in Richmond?

In Richmond, Virginia, the average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high health threat from unprotected exposure to the UV radiation.
Average temperature in September - Richmond, VA
  • Average high temperature in September: 81.2°F

The warmest month (with the highest average high temperature) is July (89.7°F).
The month with the lowest average high temperature is January (47.4°F).

  • Average low temperature in September: 60.1°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (28.3°F).

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: 4.1"

The wettest month (with the highest rainfall) is August (4.7").
The driest month (with the lowest rainfall) is February (2.8").

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: 0"

The month with the highest snowfall is January (3.9").
Months with the lowest snowfall are May, June, July, August, September and October (0").

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).