September weather forecastMellow Valley, AL
September
Weather in September
The first month of the autumn, September, is still a warm month in Mellow Valley, Alabama, with an average temperature fluctuating between 84.2°F (29°C) and 64.2°F (17.9°C).Temperature
Mellow Valley's weather in September indicates an average high-temperature of a moderately hot 84.2°F (29°C), nearly consistent with the 88.3°F (31.3°C) of August. Mellow Valley reports an average nighttime low-temperature of 64.2°F (17.9°C) in September.Heat index
For most parts of September, the heat index is estimated at a hot 91.4°F (33°C). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.Be informed that the heat index values are oriented around shady conditions and gentle breezes. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to 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
In September, the average relative humidity is 74%.Rainfall
In Mellow Valley, in September, during 14.5 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. In Mellow Valley, during the entire year, the rain falls for 184.4 days and collects up to 42.17" (1071mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
In Mellow Valley, the average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:17 am and sunset at 7:07 pm. On the last day of September, sunrise is at 6:37 am and sunset at 6:28 pm CDT.
Sunshine
In September, the average sunshine is 8.6h.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 average individuals.Note: A maximum high UV index of 5 in September translates into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mellow Valley, AL
- Average high temperature in September: 84.2°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (50.7°F).
- Average low temperature in September: 64.2°F
The months with the highest average low temperature are July and August (69.4°F).
The coldest month (with the lowest average low temperature) is January (35.2°F).
Average pressure in September
Mellow Valley, AL
- Average pressure in September: 30.01"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
Mellow Valley, AL
- Average wind speed in September: 4.8mph
The windiest months (with the highest average wind speed) are January and February (7.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.3mph).
Average humidity in September
Mellow Valley, AL
- Average humidity in September: 74%
The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Mellow Valley, AL
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is August (4.37").
The driest month (with the least rainfall) is October (2.09").
Average rainfall days in September
Mellow Valley, AL
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is July (24 days).
The month with the least rainy days is November (8.3 days).
Average snowfall in September
Mellow Valley, AL
- Average snowfall in September: 0"
The month with the highest snowfall is December (0.67").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Mellow Valley, AL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.4 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
Mellow Valley, AL
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).
Average sunshine days in September
Mellow Valley, AL
- Average sunshine days in September: 13.1 days
The months with the most sunshine days are October and November (19.7 days).
The month with the least sunshine days is July (5.6 days).
Average UV index in September
Mellow Valley, 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, February, November and December (UV index 3).
Average cloud cover in September
Mellow Valley, AL
- Average cloud cover in September: 31
The months with the most cloud cover are February and December (Cloud cover 47).
The months with the least cloud cover are June, September and October (Cloud cover 31).
Average visibility in September
Mellow Valley, AL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
