September weather forecastBirchwood, TN
September
Weather in September
September, the first month of the autumn in Birchwood, is still a warm month, with an average temperature ranging between max 81°F (27.2°C) and min 59.7°F (15.4°C).Temperature
September is characterized by a slight reduction in average high-temperature, easing from a hot 86.4°F (30.2°C) in August to a moderately hot 81°F (27.2°C). Birchwood's nighttime temperature in September falls to an average of 59.7°F (15.4°C).Heat index
September's mean heat index is appraised at a hot 86°F (30°C). Exposure and extended activity could potentially cause a state of fatigue and lead to heat cramps.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Humidity
The months with the lowest humidity are January, June through November, with an average relative humidity of 76%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.7 days and typically collects 1.77" (45mm) of precipitation.Snowfall
In Birchwood, snow does not fall in May through October.Daylight
In September, the average length of the day in Birchwood is 12h and 23min.On the first day of September, sunrise is at 7:12 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 7:24 pm EDT.
Sunshine
The average sunshine in September is 8.3h.UV index
In Birchwood, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 5 translates into these guidelines:
Take necessary precautions - Protection from skin and eye injury is mandatory. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Birchwood, TN
- Average high temperature in September: 81°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (45°F).
- Average low temperature in September: 59.7°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).
Average pressure in September
Birchwood, TN
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Birchwood, TN
- Average wind speed in September: 4.2mph
The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest months (with the lowest average wind speed) are July and August (3.9mph).
Average humidity in September
Birchwood, TN
- Average humidity in September: 76%
The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are January, June, July, August, September, October and November (76%).
Average rainfall in September
Birchwood, TN
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is December (3.15").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in September
Birchwood, TN
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is November (8.7 days).
Average snowfall in September
Birchwood, TN
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.51").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Birchwood, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (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
Birchwood, TN
- Average daylight in September: 12h and 24min
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: 8h and 18min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Birchwood, TN
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is July (11.5 days).
Average UV index in September
Birchwood, TN
- 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
Birchwood, TN
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 32).
Average visibility in September
Birchwood, TN
- Average visibility in September: 5mi
The months with the highest visibility are June, October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, July, August, September and December (5mi).
