September weather forecast
Chesapeake, VA

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Weather in September

September in Chesapeake marks the onset of meteorological fall, soothing the summer's heat with milder temperatures. Yet, it is notable for its ideal blend of weather elements, with both the land and sea temperatures in the comfortably warm 70s°F region. As the temperatures begin their steady decline, the days gradually become shorter, hinting at the change of seasons. Despite the reduced heat, the city continues to enjoy ample sunlight and experiences great weather overall. The incoming autumn, with its distinctive cooler mornings and nights, ushers in September's transitional phase from summer to fall.

Temperature

A minor decrease in the average high-temperature is observed during September, shifting from 84.7°F (29.3°C) in August to a still moderately hot 79.2°F (26.2°C). During September, Chesapeake experiences a consistent low-temperature average of 68.4°F (20.2°C).

Humidity

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

Rainfall

In Chesapeake, in September, it is raining for 13 days, with typically 2.28" (58mm) of accumulated precipitation. Throughout the year, in Chesapeake, there are 151.9 rainfall days, and 20.35" (517mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall in Chesapeake.

Ocean temperature

In Chesapeake, in September, the average water temperature is 75.6°F (24.2°C).
Note: Cold sensitivities vary, but with the right amount of sunshine, a gentle breeze, and a warm day, a swim in 75.6°F (24.2°C) waters might be just right. Remember, Olympic swimmers are used to waters between 77°F (25°C) and 82.4°F (28°C).

Daylight

In Chesapeake, the average length of the day in September is 12h and 24min.
On the first day of September, sunrise is at 6:36 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:49 pm EDT.

Sunshine

In Chesapeake, the average sunshine in September is 9.4h.

UV index

In Chesapeake, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the UV index of 5 transforms into the following advice:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Heads up! Sand and water reflection magnifies the UV exposure from the Sun.
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Frequently asked questions

What is the average September temperature in Chesapeake?

In Chesapeake, in September, the average high-temperature is 79.2°F (26.2°C), and the average low-temperature is 68.4°F (20.2°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in August is computed to be 93.2°F (34°C).

What is the average humidity in September in Chesapeake?

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

How much does it rain in Chesapeake in September?

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

When it does not snow in Chesapeake?

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

What is the ocean temperature in September in Chesapeake?

In September, the average ocean temperature is 75.6°F (24.2°C). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 75.6°F (24.2°C) water may be enjoyable.

How many hours of daylight does Chesapeake have in September?

The average day length in September in Chesapeake is 12h and 24min.

What time are sunrise and sunset in September in Chesapeake?

In September, on the first day of the month, sunrise is at 6:36 am and sunset at 7:33 pm. On the last day of the month, in Chesapeake, Virginia, sunrise is at 7:00 am and sunset at 6:49 pm EDT.

How many hours of sunshine does Chesapeake have in September?

The average sunshine duration in September is 9.4h.

What is the UV index intensity in September in Chesapeake?

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
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
Chesapeake, VA

Average temperature in September - Chesapeake, 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
Chesapeake, VA

Average pressure in September - Chesapeake, 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
Chesapeake, VA

Average wind speed in September - Chesapeake, 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
Chesapeake, VA

Average humidity in September - Chesapeake, 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
Chesapeake, VA

Average rainfall in September - Chesapeake, 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
Chesapeake, VA

Average rainfall days in September - Chesapeake, 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
Chesapeake, VA

Average snowfall in September - Chesapeake, 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
Chesapeake, VA

Average snowfall days in September - Chesapeake, 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
Chesapeake, VA

Average sea temperature in September - Chesapeake, 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
Chesapeake, VA

Average daylight in September / Average sunshine in September - Chesapeake, 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: 9h and 2min

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
Chesapeake, VA

Average sunshine days in September - Chesapeake, 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
Chesapeake, VA

Average UV index in September - Chesapeake, 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
Chesapeake, VA

Average cloud cover in September - Chesapeake, 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
Chesapeake, VA

Average visibility in September - Chesapeake, 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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Chesapeake, Virginia, USA

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