September weather forecastChesapeake, VA
September
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 subtle shift in Chesapeake's weather is observed as August turns into September, with the average high temperature reducing from 84.7°F (29.3°C) to a still warm 79.2°F (26.2°C). Chesapeake, during the month of September, experiences an average low-temperature of 68.4°F (20.2°C).Humidity
In September, the average relative humidity is 76%.Rainfall
In Chesapeake, Virginia, during September, the rain falls for 13 days and regularly aggregates up to 2.28" (58mm) of precipitation. In Chesapeake, during the entire year, the rain falls for 151.9 days and collects up to 20.35" (517mm) of precipitation.Snowfall
In Chesapeake, snow does not fall in April through October.Ocean temperature
In September, the average ocean temperature is 75.6°F (24.2°C).Note: Your comfort in 75.6°F (24.2°C) waters hinges on your relationship with the cold, today's sunny disposition, wind patterns, and the air's temperature. For context, Olympic swimmers are no strangers to waters of 77°F (25°C) to 82.4°F (28°C).
Daylight
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 7:00 am and sunset at 6:49 pm EDT.
Sunshine
In Chesapeake, the average sunshine in September is 9.4h.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 unsafe exposure to UV radiation for average individuals.Note: In September, a regular UV index of 5 translates into these guidelines:
Take measures. Individuals with light skin might experience burns in under 30 minutes. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Warning! Reflective surfaces like sand and water amplify the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
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).
Average daylight in September /
Average sunshine in September
Chesapeake, VA
- Average daylight in September: 12h and 24min
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 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).
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).
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).
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).
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).
