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
As September arrives, Riverdale's weather displays a minor decrease in high-temperatures, transitioning from August's warm 85.6°F (29.8°C) to a still moderately hot 78.6°F (25.9°C). In September, Riverdale endures a notable temperature shift from day to night, with lows averaging at a mild 56.8°F (13.8°C).Humidity
In September, the average relative humidity in Riverdale is 63%.Rainfall
In Riverdale, in September, it is raining for 8.7 days, with typically 0.79" (20mm) of accumulated precipitation. Throughout the year, there are 102.6 rainfall days, and 17.44" (443mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day in Riverdale is 12h and 27min.On the first day of September in Riverdale, sunrise is at 7:04 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 7:19 pm CDT.
Sunshine
In September, the average sunshine in Riverdale, Nebraska, is 8.8h.UV index
In September, the average daily maximum UV index in Riverdale, Nebraska, is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: In September, a daily UV index of 5 turns into the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Riverdale?
What is the average humidity in September in Riverdale?
How much does it rain in Riverdale in September?
When it does not snow in Riverdale?
Does it snow in Riverdale in September?
How many hours of daylight does Riverdale have in September?
When is the sunrise / sunset in September in Riverdale?
How many hours of sunshine does Riverdale have in September?
What is the UV index intensity in September in Riverdale?
Average temperature in September
Riverdale, NE
- Average high temperature in September: 78.6°F
The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (34.9°F).
- Average low temperature in September: 56.8°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in September
Riverdale, NE
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Riverdale, NE
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest month (with the lowest average wind speed) is July (8.5mph).
Average humidity in September
Riverdale, NE
- Average humidity in September: 63%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is October (59%).
Average rainfall in September
Riverdale, NE
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in September
Riverdale, NE
- Average rainfall days in September: 8.7 days
The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Riverdale, NE
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Riverdale, NE
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (8.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Riverdale, NE
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Riverdale, NE
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is November (23.5 days).
The month with the least sunshine days is May (13.8 days).
Average UV index in September
Riverdale, NE
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Riverdale, NE
- Average cloud cover in September: 25
The months with the most cloud cover are January, February and March (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 24).
Average visibility in September
Riverdale, NE
- 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).
Riverdale, Nebraska, USA
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