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 dawn of September sees an average high-temperature of a moderately hot 81.5°F (27.5°C), subtly contrasting with August's 86.5°F (30.3°C). Smithfield records a consistent low-temperature of 64.9°F (18.3°C) during September nights.Heat index
In September, the average heat index is calculated to be a tropical 87.8°F (31°C). Remaining active during long-lasting exposure could cause fatigue, leading to heat cramps.Research indicates the heat index considers values in shaded locales and with light winds. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an estimation of the warmth sensation when considering humidity levels. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular significance for children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
Humidity
The months with the highest humidity are May, August and September, with an average relative humidity of 77%.Rainfall
In Smithfield, in September, it is raining for 10.1 days, with typically 0.79" (20mm) of accumulated precipitation. Throughout the year, there are 115.7 rainfall days, and 11.06" (281mm) of precipitation is accumulated.Snowfall
In Smithfield, snow does not fall in March through December.Daylight
In Smithfield, North Carolina, the average length of the day in September is 12h and 23min.On the first day of September in Smithfield, sunrise is at 6:46 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:58 pm EDT.
Sunshine
In September, the average sunshine is 9h.UV index
In Smithfield, North Carolina, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: A typical high UV index of 5 in September suggests the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Tightly woven clothing, when worn loosely, shields effectively against 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 most humid month?
What is the average humidity in September in Smithfield?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September in Smithfield?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Smithfield, NC
- Average high temperature in September: 81.5°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (48.9°F).
- Average low temperature in September: 64.9°F
The month with the highest average low temperature is July (71.1°F).
The coldest month (with the lowest average low temperature) is January (34.2°F).
Average pressure in September
Smithfield, NC
- Average pressure in September: 30.02"Hg
The months with the highest atmospheric pressure are November and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Smithfield, NC
- Average wind speed in September: 6.7mph
The windiest month (with the highest average wind speed) is April (9mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Smithfield, NC
- Average humidity in September: 77%
The months with the highest relative humidity are May, August and September (77%).
The months with the lowest relative humidity are January, March and November (73%).
Average rainfall in September
Smithfield, NC
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is August (1.5").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in September
Smithfield, NC
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is November (6.5 days).
Average snowfall in September
Smithfield, NC
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Smithfield, NC
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and December (0 days).
Average daylight in September /
Average sunshine in September
Smithfield, NC
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in September
Smithfield, NC
- Average sunshine days in September: 18.6 days
The month with the most sunshine days is October (22.7 days).
The month with the least sunshine days is July (13.9 days).
Average UV index in September
Smithfield, NC
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Smithfield, NC
- Average cloud cover in September: 37
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in September
Smithfield, NC
- 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).
Smithfield, North Carolina, USA
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