September weather forecast
Norfolk, VA

A breathtaking night panorama of the well developed Norfolk City, Virginia
A breathtaking night panorama of the well developed Norfolk City, Virginia

Weather in September

The first month of the autumn, September, is still a warm month in Norfolk, Virginia, with an average temperature fluctuating between 68.4°F (20.2°C) and 79.2°F (26.2°C).

Temperature

In Norfolk, the average high-temperature in September slightly decreases from a warm 84.7°F (29.3°C) in August to a still moderately hot 79.2°F (26.2°C). The average low-temperature, in September, is 68.4°F (20.2°C).

Humidity

In September, the average relative humidity is 76%.

Rainfall

In September, the rain falls for 13 days. Throughout September, 2.28" (58mm) of precipitation is accumulated. Throughout the year, in Norfolk, there are 151.9 rainfall days, and 20.35" (517mm) of precipitation is accumulated.

Snowfall

In Norfolk, Virginia, snow does not fall in April through October.

Ocean temperature

In Norfolk, the average seawater temperature in September is 75.6°F (24.2°C).
Note: For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 75.6°F (24.2°C).

Daylight

In Norfolk, the average length of the day in September is 12h and 24min.
On the first day of the month, sunrise is at 6:36 am and sunset at 7:33 pm. On the last day of September, sunrise is at 6:59 am and sunset at 6:50 pm EDT.

Sunshine

In September, the average sunshine is 9.4h.

UV index

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the average humidity in September in Norfolk?

In Norfolk, the average relative humidity in September is 76%.

How many days does it rain in September in Norfolk?

In Norfolk, in September, during 13 rainfall days, 2.28" (58mm) of precipitation is typically accumulated.

When it does not snow in Norfolk?

In Norfolk, Virginia, snow does not fall in April through October.

What is the ocean temperature in September in Norfolk?

In Norfolk, Virginia, in September, the average water temperature is 75.6°F (24.2°C). For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 75.6°F (24.2°C).

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

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

When are sunrise and sunset in September in Norfolk?

On the first day of September in Norfolk, Virginia, sunrise is at 6:36 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:50 pm EDT.

How long on average sun shines in September in Norfolk?

In September, the average sunshine duration is 9.4h.

How high is the UV index in September in Norfolk?

In September, the average daily maximum UV index in Norfolk, Virginia, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Norfolk, VA

Average temperature in September - Norfolk, VA
  • Average high temperature in September: 79.2°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (45.9°F).

  • Average low temperature in September: 68.4°F

The month with the highest average low temperature is July (73.6°F).
The coldest month (with the lowest average low temperature) is January (34.7°F).

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Average pressure in September
Norfolk, VA

Average pressure in September - Norfolk, VA
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

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Average wind speed in September
Norfolk, VA

Average wind speed in September - Norfolk, VA
  • Average wind speed in September: 8.7mph

The windiest months (with the highest average wind speed) are March and April (10.5mph).
The calmest month (with the lowest average wind speed) is August (7.5mph).

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Average humidity in September
Norfolk, VA

Average humidity in September - Norfolk, VA
  • Average humidity in September: 76%

The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are July and November (74%).

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Average rainfall in September
Norfolk, VA

Average rainfall in September - Norfolk, VA
  • Average rainfall in September: 2.28"

The wettest month (with the highest rainfall) is August (2.52").
The driest month (with the least rainfall) is November (1.1").

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Average rainfall days in September
Norfolk, VA

Average rainfall days in September - Norfolk, VA
  • Average rainfall days in September: 13 days

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is November (8.3 days).

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Average snowfall in September
Norfolk, VA

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

The month with the highest snowfall is January (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Norfolk, VA

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

The month with the highest number of snowfall days is January (2.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average sea temperature in September
Norfolk, VA

Average sea temperature in September - Norfolk, VA
  • Average sea temperature in September: 75.6°F

The best month for swimming (with the highest average sea temperature) is August (80°F).
The coldest month (with the lowest average sea temperature) is February (44.5°F).

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

Average daylight in September / Average sunshine in September - Norfolk, VA
  • Average daylight in September: 12h and 24min

The month with the longest days is June (Average daylight: 14h and 39min).
The month with the shortest days is December (Average daylight: 9h and 41min).

  • Average sunshine in September: 9h and 24min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).

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Average sunshine days in September
Norfolk, VA

Average sunshine days in September - Norfolk, VA
  • Average sunshine days in September: 13.9 days

The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is August (10.8 days).

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Average UV index in September
Norfolk, VA

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

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

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Average cloud cover in September
Norfolk, VA

Average cloud cover in September - Norfolk, VA
  • Average cloud cover in September: 33

The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in September
Norfolk, VA

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

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

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