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's average high-temperature stands at a still moderately hot 79°F (26.1°C), showing little deviation from August's 83.8°F (28.8°C). Despite considerable daily temperature swings, a steady low-temperature average of 56.5°F (13.6°C) is noted throughout September.Humidity
In September, the average relative humidity is 76%.Rainfall
The month with the least rainfall in Castell Springs is September, when the rain falls for 14.2 days and typically collects 1.65" (42mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day in Castell Springs, Tennessee, is 12h and 24min.On the first day of the month, sunrise is at 7:03 am and sunset at 7:58 pm. On the last day of September, sunrise is at 7:26 am and sunset at 7:15 pm EDT.
Sunshine
In Castell Springs, the average sunshine in September is 8.7h.UV index
The average daily maximum UV index in September in Castell Springs is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Castell Springs?
What is the average humidity in September in Castell Springs?
What is the driest month in Castell Springs?
How much does it rain in Castell Springs in September?
When it does not snow in Castell Springs?
Does it snow in Castell Springs in September?
What is the average length of the day in September in Castell Springs?
When are sunrise and sunset in September in Castell Springs?
How many hours of sunshine does Castell Springs have in September?
How high is the UV index in September in Castell Springs?
Average temperature in September
Castell Springs, TN
- Average high temperature in September: 79°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (43.2°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).
Average pressure in September
Castell Springs, TN
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in September
Castell Springs, TN
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in September
Castell Springs, TN
- Average humidity in September: 76%
The month with the highest relative humidity is December (79%).
The months with the lowest relative humidity are July and August (74%).
Average rainfall in September
Castell Springs, TN
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is February (3.39").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in September
Castell Springs, TN
- Average rainfall days in September: 14.2 days
The month with the highest number of rainy days is July (19.7 days).
The month with the least rainy days is November (11.4 days).
Average snowfall in September
Castell Springs, TN
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Castell Springs, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Castell Springs, TN
- Average daylight in September: 12h and 2min
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 42min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in September
Castell Springs, TN
- Average sunshine days in September: 13.3 days
The month with the most sunshine days is October (16.7 days).
The month with the least sunshine days is July (8.8 days).
Average UV index in September
Castell Springs, TN
- Average UV index in September: 4
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
Castell Springs, TN
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are June and August (Cloud cover 28).
Average visibility in September
Castell Springs, TN
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Castell Springs, Tennessee, USA
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