September weather forecastRiverton, KS
September
Weather in September
September, the first month of the autumn in Riverton, is also a moderately hot month, with temperature in the range of an average high of 80.4°F (26.9°C) and an average low of 61.5°F (16.4°C).Temperature
A mild drop in Riverton's average high-temperature is observed in September, transitioning from a tropical 88.2°F (31.2°C) in August to a moderately hot 80.4°F (26.9°C). An average minimum temperature of 61.5°F (16.4°C) marks the month of September in Riverton.Humidity
In September, the average relative humidity is 74%.Rainfall
In Riverton, Kansas, in September, during 12.4 rainfall days, 2.8" (71mm) of precipitation is typically accumulated. In Riverton, during the entire year, the rain falls for 139.2 days and collects up to 30" (762mm) of precipitation.Snowfall
In Riverton, snow does not fall in April, June through October.Daylight
In Riverton, the average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:50 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:03 pm CDT.
Sunshine
The average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In September, a daily UV index of 5 turns into the following recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Riverton, KS
- Average high temperature in September: 80.4°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 (43.2°F).
- Average low temperature in September: 61.5°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).
Average pressure in September
Riverton, KS
- 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 (29.91"Hg).
Average wind speed in September
Riverton, KS
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in September
Riverton, KS
- Average humidity in September: 74%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Riverton, KS
- Average rainfall in September: 2.8"
The wettest month (with the highest rainfall) is May (5.04").
The driest month (with the least rainfall) is November (1.42").
Average rainfall days in September
Riverton, KS
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (6.5 days).
Average snowfall in September
Riverton, KS
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.09").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in September
Riverton, KS
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Riverton, KS
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 9h and 12min
The months with the most sunshine are June and July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in September
Riverton, KS
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is December (21.5 days).
The month with the least sunshine days is May (13.3 days).
Average UV index in September
Riverton, KS
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Riverton, KS
- Average cloud cover in September: 28
The months with the most cloud cover are February and March (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Riverton, KS
- 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).
