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 onset corresponds with a subtle shift in the average high-temperature, slightly moving from a tropical 89.2°F (31.8°C) in August to a moderately hot 83.8°F (28.8°C). Throughout September, Riverton anticipates an average low-temperature of 63.7°F (17.6°C).Heat index
For September, the heat index is computed to be a tropical 91.4°F (33°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.The heat index's values are generally associated with conditions in shade and light breezes. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is the outcome of merging air's temperature and its humidity metrics. 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. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Humidity
In September, the average relative humidity in Riverton is 74%.Rainfall
September is the month with the least rainfall in Riverton, Alabama. Rain falls for 13 days and accumulates 1.77" (45mm) of precipitation.Snowfall
April through October are months without snowfall in Riverton.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September in Riverton, sunrise is at 6:25 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:37 pm CDT.
Sunshine
In September, the average sunshine in Riverton is 9.1h.UV index
In Riverton, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Boost your sun resistance with garments that are densely woven yet spacious.
Frequently asked questions
Is it hot in Riverton during September?
What is the average humidity in September in Riverton?
What is the driest month in Riverton?
How much does it rain in Riverton in September?
When it does not snow in Riverton?
How many hours of daylight does Riverton have in September?
When is the sunrise / sunset in September in Riverton?
How many hours of sunshine does Riverton have in September?
How high is the UV index in September in Riverton?
Average temperature in September
Riverton, AL
- Average high temperature in September: 83.8°F
The warmest month (with the highest average high temperature) is July (89.8°F).
The month with the lowest average high temperature is January (47.3°F).
- Average low temperature in September: 63.7°F
The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (33.1°F).
Average pressure in September
Riverton, 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 (29.96"Hg).
Average wind speed in September
Riverton, AL
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is February (7.8mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).
Average humidity in September
Riverton, 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 (72%).
Average rainfall in September
Riverton, AL
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is February (3.78").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in September
Riverton, AL
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (9 days).
Average snowfall in September
Riverton, AL
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Riverton, AL
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (2.1 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
Riverton, AL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in September
Riverton, AL
- Average sunshine days in September: 15.6 days
The months with the most sunshine days are October and November (19.3 days).
The month with the least sunshine days is July (11 days).
Average UV index in September
Riverton, AL
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Riverton, AL
- Average cloud cover in September: 30
The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in September
Riverton, 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).
Riverton, Alabama, USA
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