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
With the onset of September, the average high-temperature stands at a moderately hot 84°F (28.9°C), closely aligned with August's 89.2°F (31.8°C). The average low-temperature during September nights is an enjoyable 64°F (17.8°C).Heat index
In September, the average heat index is estimated at a hot 91.4°F (33°C). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'feels like', shows a temperature sensation when both heat and moisture conditions are combined. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Humidity
In September, the average relative humidity is 73%.Rainfall
In Dempsey, during September, the rain falls for 13.1 days and regularly aggregates up to 2.56" (65mm) of precipitation. Throughout the year, there are 170.7 rainfall days, and 40.24" (1022mm) of precipitation is accumulated.Snowfall
In Dempsey, snow does not fall in April through October.Daylight
In Dempsey, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:17 pm. On the last day of September, sunrise is at 6:46 am and sunset at 6:36 pm CDT.
Sunshine
In September, the average sunshine is 9h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Dempsey have in September?
How high is the UV index in September?
Average temperature in September
Dempsey, AL
- Average high temperature in September: 84°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (48.6°F).
- Average low temperature in September: 64°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (33.6°F).
Average pressure in September
Dempsey, 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 (29.97"Hg).
Average wind speed in September
Dempsey, AL
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is February (7.8mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).
Average humidity in September
Dempsey, AL
- Average humidity in September: 73%
The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Dempsey, AL
- Average rainfall in September: 2.56"
The wettest month (with the highest rainfall) is February (4.41").
The driest month (with the least rainfall) is November (2.28").
Average rainfall days in September
Dempsey, AL
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is July (19.2 days).
The month with the least rainy days is November (9.4 days).
Average snowfall in September
Dempsey, AL
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.55").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Dempsey, AL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Dempsey, 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: 9h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Dempsey, AL
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is July (10.2 days).
Average UV index in September
Dempsey, AL
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Dempsey, AL
- Average cloud cover in September: 30
The months with the most cloud cover are February and December (Cloud cover 50).
The months with the least cloud cover are June and September (Cloud cover 30).
Average visibility in September
Dempsey, AL
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, May and July (5mi).
Dempsey, Alabama, USA
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