September weather forecast
Riverton, AL

Share

Weather in September

September, the first month of the autumn in Riverton, is still a warm month, with temperature in the range of an average high of 83.8°F (28.8°C) and an average low of 63.7°F (17.6°C).

Temperature

September's arrival subtly correlates with a reduction in the average high-temperature, down from a hot 89.2°F (31.8°C) in August to a warm 83.8°F (28.8°C). Riverton, in September, witnesses an average low-temperature of 63.7°F (17.6°C).

Heat index

Throughout September, the heat index is computed to be a hot 91.4°F (33°C). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.
Understand that the heat index values take into account shaded locations and mild winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', marries air temperature and humidity to produce a value illustrating perceived warmth. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.

Humidity

In September, the average relative humidity in Riverton is 74%.

Rainfall

September is the month with the least rainfall. Rain falls for 13 days and accumulates 1.77" (45mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In Riverton, 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 7:18 pm. On the last day of September, in Riverton, sunrise is at 6:46 am and sunset at 6:37 pm CDT.

Sunshine

The average sunshine in September is 9.1h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 5 in September interprets into the following advice:
Put precautions into practice - Ensuring skin and eye safety is a necessity. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Updated: Aug 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?

During September, Riverton experiences an average high-temperature of 83.8°F (28.8°C) and a low-temperature of 63.7°F (17.6°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in September is computed to be 91.4°F (33°C).

What is the average humidity in September?

In September, the average relative humidity is 74%.

What is the driest month?

The month with the least rainfall in Riverton is September, when the rain falls for 13 days and typically collects 1.77" (45mm) of precipitation.

How much does it rain in September?

In Riverton, during September, the rain falls for 13 days and regularly aggregates up to 1.77" (45mm) of precipitation.

When it does not snow?

In Riverton, snow does not fall in April through October.

How many hours of daylight does Riverton have in September?

The average day length in September in Riverton is 12h and 23min.

What time are sunrise and sunset in September?

On the first day of September, 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.

How many hours of sunshine does Riverton have in September?

The average sunshine duration in September is 9.1h.

What is the UV index intensity in September?

In September, the average daily maximum UV index in Riverton is 5. A UV Index reading of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Riverton, AL

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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 / 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 - 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 - 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 - 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 - 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

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location