Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The start of September signals a gentle decrease in the average high-temperature, transitioning from a tropical 87.4°F (30.8°C) in August to a moderately hot 80.6°F (27°C). Throughout September, Cullen records an average temperature of 61.3°F (16.3°C) at night.Heat index
In September, the heat index is computed to be 84.2°F (29°C). Fatigue might occur with continuous exposure and activity, potentially causing heat cramps.Keep in mind the heat index values are meant for areas in shade and with light wind. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Humidity
The average relative humidity in September in Cullen, Virginia, is 75%.Rainfall
The month with the least rainfall in Cullen, Virginia, is September, when the rain falls for 12.2 days and typically collects 1.69" (43mm) of precipitation.Snowfall
In Cullen, Virginia, snow does not fall in May through September.Daylight
In Cullen, Virginia, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:45 am and sunset at 7:42 pm. On the last day of September, sunrise is at 7:09 am and sunset at 6:58 pm EDT.
Sunshine
The average sunshine in September in Cullen, Virginia, is 8.7h.UV index
In Cullen, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 5 during September translates into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Cullen?
What is the average humidity in September in Cullen?
What is the driest month in Cullen?
How many days does it rain in September in Cullen?
When it does not snow in Cullen?
Does it snow in Cullen in September?
How many hours of daylight does Cullen have in September?
What time are sunrise and sunset in September in Cullen?
How many hours of sunshine does Cullen have in September?
What is the UV index reading in September in Cullen?
Average temperature in September
Cullen, VA
- Average high temperature in September: 80.6°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (44.6°F).
- Average low temperature in September: 61.3°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).
Average pressure in September
Cullen, VA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Cullen, VA
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in September
Cullen, VA
- Average humidity in September: 75%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (69%).
Average rainfall in September
Cullen, VA
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in September
Cullen, VA
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (9 days).
Average snowfall in September
Cullen, VA
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.52").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Cullen, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Cullen, VA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Cullen, VA
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in September
Cullen, VA
- Average UV index in September: 5
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 and December (UV index 2).
Average cloud cover in September
Cullen, VA
- Average cloud cover in September: 39
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Cullen, VA
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, June, July, August, October and November (6mi).
The months with the lowest visibility are January, May, September and December (5mi).
Cullen, Virginia, USA
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