September weather forecast
Colonial Village, DC

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Weather in September

Fall begins to make its appearance in September in Colonial Village. While the temperature begins to descend, reminding of the inevitable change, it still stays within the comfortable range of warmth. As autumn approaches, the number of daylight hours reduces, making way for shorter days. September's weather is characterized by milder temperatures, less rainfall, and clear, beautiful skies. It indeed offers beautiful weather situations, making it a favorite month for many.

Temperature

Colonial Village's progression into September involves a gentle drop in the average high-temperature, from 85.8°F (29.9°C) in August to a still moderately hot 78.4°F (25.8°C). In Colonial Village, September's nights observe an average temperature dip to an enjoyable 61.9°F (16.6°C).

Humidity

In September, the average relative humidity is 74%.

Rainfall

In Colonial Village, in September, it is raining for 12.5 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, in Colonial Village, there are 149.1 rainfall days, and 26.14" (664mm) of precipitation is accumulated.

Snowfall

April through November are months without snowfall in Colonial Village, District of Columbia.

Daylight

In Colonial Village, the average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 6:37 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:51 pm EDT.

Sunshine

In September, the average sunshine is 9h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September in Colonial Village?

Colonial Village in September has an average high-temperature of 78.4°F (25.8°C) and an average low-temperature of 61.9°F (16.6°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in August is computed to be 95°F (35°C).

What is the average humidity in September in Colonial Village?

In Colonial Village, the average relative humidity in September is 74%.

How many days does it rain in September in Colonial Village?

In September, in Colonial Village, the rain falls for 12.5 days. Throughout September, 1.85" (47mm) of precipitation is accumulated.

When it does not snow in Colonial Village?

In Colonial Village, snow does not fall in April through November.

How many hours of daylight does Colonial Village have in September?

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

When are sunrise and sunset in September in Colonial Village?

On the first day of September in Colonial Village, District of Columbia, sunrise is at 6:37 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:51 pm EDT.

How long on average sun shines in September in Colonial Village?

The average sunshine duration in September in Colonial Village is 9h.

What is the UV index intensity in September in Colonial Village?

The average daily maximum UV index in September in Colonial Village, District of Columbia, is 5. A UV Index of 3 to 5 symbolizes a moderate health threat 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
Colonial Village, DC

Average temperature in September - Colonial Village, DC
  • Average high temperature in September: 78.4°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.6°F).

  • Average low temperature in September: 61.9°F

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).

Average pressure in September
Colonial Village, DC

Average pressure in September - Colonial Village, DC
  • Average pressure in September: 30.05"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
Colonial Village, DC

Average wind speed in September - Colonial Village, DC
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is March (7.9mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in September
Colonial Village, DC

Average humidity in September - Colonial Village, DC
  • Average humidity in September: 74%

The month with the highest relative humidity is May (76%).
The months with the lowest relative humidity are April and July (71%).

Average rainfall in September
Colonial Village, DC

Average rainfall in September - Colonial Village, DC
  • Average rainfall in September: 1.85"

The wettest month (with the highest rainfall) is August (3.46").
The driest month (with the least rainfall) is January (1.57").

Average rainfall days in September
Colonial Village, DC

Average rainfall days in September - Colonial Village, DC
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is November (8.1 days).

Average snowfall in September
Colonial Village, DC

Average snowfall in September - Colonial Village, DC
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.17").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in September
Colonial Village, DC

Average snowfall days in September - Colonial Village, DC
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (3.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Colonial Village, DC

Average daylight in September / Average sunshine in September - Colonial Village, DC
  • 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 30min).

  • Average sunshine in September: 9h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 6min).

Average sunshine days in September
Colonial Village, DC

Average sunshine days in September - Colonial Village, DC
  • Average sunshine days in September: 15.7 days

The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (12.8 days).

Average UV index in September
Colonial Village, DC

Average UV index in September - Colonial Village, DC
  • Average UV index in September: 5

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

Average cloud cover in September
Colonial Village, DC

Average cloud cover in September - Colonial Village, DC
  • Average cloud cover in September: 36

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).

Average visibility in September
Colonial Village, DC

Average visibility in September - Colonial Village, DC
  • Average visibility in September: 6mi

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

Colonial Village, District of Columbia, USA

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