September weather forecastCardiff, TN
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Cardiff, Tennessee, with an average temperature varying between 79.7°F (26.5°C) and 59.2°F (15.1°C).Temperature
Start of September brings a slight shift in the average high-temperature, dipping a bit from August's 85.5°F (29.7°C) to a still moderately hot 79.7°F (26.5°C). September nights experience a consistent temperature drop to a mild 59.2°F (15.1°C).Humidity
In September, the average relative humidity is 77%.Rainfall
September is the month with the least rainfall. Rain falls for 13.2 days and accumulates 2.32" (59mm) of precipitation.Snowfall
In Cardiff, snow does not fall in May through October.Daylight
The average length of the day in September in Cardiff is 12h and 23min.On the first day of the month, sunrise is at 7:10 am and sunset at 8:05 pm. On the last day of September, sunrise is at 7:33 am and sunset at 7:23 pm EDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, a regular UV index of 5 translates into these guidelines:
Prioritize safety - Recommendations to avert sunburn are shared. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cardiff, TN
- Average high temperature in September: 79.7°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 (43.7°F).
- Average low temperature in September: 59.2°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).
Average pressure in September
Cardiff, 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
Cardiff, TN
- Average wind speed in September: 4mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in September
Cardiff, TN
- Average humidity in September: 77%
The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
Cardiff, TN
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is July (4.29").
The driest month (with the least rainfall) is September (2.32").
Average rainfall days in September
Cardiff, TN
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is November (10.7 days).
Average snowfall in September
Cardiff, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.18").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Cardiff, TN
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (3.3 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
Cardiff, TN
- 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 48min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The months with the least sunshine are January and December (Average sunshine: 4h and 54min).
Average sunshine days in September
Cardiff, TN
- Average sunshine days in September: 14.3 days
The months with the most sunshine days are October and November (18.5 days).
The month with the least sunshine days is July (9.4 days).
Average UV index in September
Cardiff, 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
Cardiff, TN
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in September
Cardiff, TN
- Average visibility in September: 5mi
The months with the highest visibility are April, June, October and November (6mi).
The months with the lowest visibility are January, February, March, May, July, August, September and December (5mi).
