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
September reveals a small adjustment in temperature, transitioning from an average high of a tropical 86.2°F (30.1°C) in August to a moderately hot 79.3°F (26.3°C). During September, Triangle's temperature falls to a steady low-temperature average of 61°F (16.1°C).Humidity
In September, the average relative humidity is 76%.Rainfall
In September, the rain falls for 11.5 days. Throughout September, 2.05" (52mm) of precipitation is accumulated. Throughout the year, there are 155.6 rainfall days, and 31.61" (803mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In Triangle, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:38 pm. On the last day of September, sunrise is at 7:04 am and sunset at 6:53 pm EDT.
Sunshine
In September, the average sunshine is 8.6h.UV index
In Triangle, Virginia, 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 the ordinary person.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Put precautions into practice - Guidance to elude sunburn is provided. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September in Triangle?
When it does not snow?
What is the average length of the day in September in Triangle?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Triangle, VA
- Average high temperature in September: 79.3°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (41.5°F).
- Average low temperature in September: 61°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).
Average pressure in September
Triangle, VA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Triangle, VA
- Average wind speed in September: 5.3mph
The windiest months (with the highest average wind speed) are March and April (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Triangle, VA
- Average humidity in September: 76%
The months with the highest relative humidity are October and December (78%).
The months with the lowest relative humidity are January, April and July (73%).
Average rainfall in September
Triangle, VA
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is August (3.66").
The driest month (with the least rainfall) is January (1.97").
Average rainfall days in September
Triangle, VA
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is November (8.7 days).
Average snowfall in September
Triangle, VA
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.52").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Triangle, VA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Triangle, VA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).
Average sunshine days in September
Triangle, VA
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in September
Triangle, 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, November and December (UV index 2).
Average cloud cover in September
Triangle, VA
- Average cloud cover in September: 39
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Triangle, VA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Triangle, Virginia, USA
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