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 shift into September reveals an average high-temperature of a moderately hot 83.3°F (28.5°C), closely mirroring August's climate. Somerville records an average nighttime low of 63.9°F (17.7°C) in September.Heat index
September's heat index is estimated at a tropical 89.6°F (32°C). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.Be aware that heat index ratings are designed for shaded locations and minor breezes. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', melds the effects of warmth and moisture to generate a feeling of heat. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
Humidity
The average relative humidity in September is 74%.Rainfall
In Somerville, in September, during 13.9 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. In Somerville, during the entire year, the rain falls for 171.8 days and collects up to 41.18" (1046mm) of precipitation.Snowfall
In Somerville, Alabama, snow does not fall in April through October.Daylight
In September, the average length of the day in Somerville is 12h and 23min.On the first day of September, sunrise is at 6:20 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:32 pm CDT.
Sunshine
In Somerville, Alabama, the average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index in Somerville is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 5 during September leads to these instructions:
Make use of precautions - Suggestions to resist sunburn are communicated. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Frequently asked questions
How hot is September in Somerville?
What is the average humidity in September in Somerville?
How much does it rain in Somerville in September?
When it does not snow in Somerville?
How many hours of daylight does Somerville have in September?
When are sunrise and sunset in September in Somerville?
How many hours of sunshine does Somerville have in September?
How high is the UV index in September in Somerville?
Average temperature in September
Somerville, AL
- Average high temperature in September: 83.3°F
The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is January (47.8°F).
- Average low temperature in September: 63.9°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).
Average pressure in September
Somerville, AL
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Somerville, AL
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is February (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in September
Somerville, AL
- Average humidity in September: 74%
The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Somerville, AL
- Average rainfall in September: 2.44"
The wettest months (with the highest rainfall) are April and December (4.29").
The driest month (with the least rainfall) is November (2.24").
Average rainfall days in September
Somerville, AL
- Average rainfall days in September: 13.9 days
The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is November (9.5 days).
Average snowfall in September
Somerville, AL
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Somerville, AL
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (1.8 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
Somerville, AL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Somerville, AL
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is October (19.6 days).
The month with the least sunshine days is July (10.5 days).
Average UV index in September
Somerville, AL
- 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 and December (UV index 2).
Average cloud cover in September
Somerville, AL
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in September
Somerville, AL
- 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).
Somerville, Alabama, USA
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