September weather forecast
Blackwater, VA

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Weather in September

September, the first month of the autumn in Blackwater, is still a warm month, with an average temperature fluctuating between 78.3°F (25.7°C) and 56.3°F (13.5°C).

Temperature

Blackwater sees the arrival of September with an average high-temperature of a still warm 78.3°F (25.7°C), indicating a subtle variation from August. In Blackwater, the average temperature during the nights of September marks a significant drop from the daily high, settling at a mild 56.3°F (13.5°C).

Humidity

The average relative humidity in September is 77%.

Rainfall

September is the month with the least rainfall. Rain falls for 14.6 days and accumulates 1.85" (47mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

In September, the average length of the day is 12h and 24min.
On the first day of September, sunrise is at 7:03 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 7:16 pm EDT.

Sunshine

The average sunshine in September is 8.4h.

UV index

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum daily UV index of 4 during September morphs into the following directions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Updated: Jun 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures in Blackwater?

The average high-temperature and low-temperature during September are 78.3°F (25.7°C) and 56.3°F (13.5°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in August is appraised at 91.4°F (33°C).

What is the average humidity in September?

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

What is the driest month?

The month with the least rainfall is September, when the rain falls for 14.6 days and typically collects 1.85" (47mm) of precipitation.

How much does it rain in Blackwater in September?

In September, in Blackwater, the rain falls for 14.6 days. Throughout September, 1.85" (47mm) of precipitation is accumulated.

When it does not snow?

May through September are months without snowfall.

Does it snow in September?

In Blackwater, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Blackwater have in September?

In September, the average day length is 12h and 24min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 7:03 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 7:16 pm EDT.

How many hours of sunshine does Blackwater have in September?

The average sunshine duration in September is 8.4h.

What is the UV index intensity in September?

In Blackwater, the average daily maximum UV index in September is 4. A UV Index value 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
Blackwater, VA

Average temperature in September - Blackwater, VA
  • Average high temperature in September: 78.3°F

The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (41°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).

Average pressure in September
Blackwater, VA

Average pressure in September - Blackwater, VA
  • Average pressure in September: 30.05"Hg

The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

Average wind speed in September
Blackwater, VA

Average wind speed in September - Blackwater, VA
  • Average wind speed in September: 4mph

The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).

Average humidity in September
Blackwater, VA

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

The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are August and November (76%).

Average rainfall in September
Blackwater, VA

Average rainfall in September - Blackwater, VA
  • Average rainfall in September: 1.85"

The wettest month (with the highest rainfall) is February (3.78").
The driest month (with the least rainfall) is September (1.85").

Average rainfall days in September
Blackwater, VA

Average rainfall days in September - Blackwater, VA
  • Average rainfall days in September: 14.6 days

The month with the highest number of rainy days is July (19.1 days).
The month with the least rainy days is November (10.5 days).

Average snowfall in September
Blackwater, VA

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

The month with the highest snowfall is February (3.27").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
Blackwater, VA

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

The month with the highest number of snowfall days is January (9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Blackwater, VA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

Average sunshine days in September
Blackwater, VA

Average sunshine days in September - Blackwater, VA
  • Average sunshine days in September: 13.7 days

The month with the most sunshine days is October (17.6 days).
The month with the least sunshine days is May (10 days).

Average UV index in September
Blackwater, VA

Average UV index in September - Blackwater, VA
  • Average UV index in September: 4

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

Average cloud cover in September
Blackwater, VA

Average cloud cover in September - Blackwater, VA
  • Average cloud cover in September: 35

The month with the most cloud cover is February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility in September
Blackwater, VA

Average visibility in September - Blackwater, VA
  • Average visibility in September: 5mi

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

Blackwater, Virginia, USA

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