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
The onset of September is marked by a minor decrease in temperature, transitioning from a tropical 86.2°F (30.1°C) in August to a warm 78.6°F (25.9°C). Sumner documents a striking divergence from daytime highs, with an average nighttime temperature of 56.1°F (13.4°C) in September.Humidity
The average relative humidity in September is 61%.Rainfall
In Sumner, in September, during 9.8 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. Throughout the year, there are 117 rainfall days, and 18.35" (466mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 27min.On the first day of September, sunrise is at 7:05 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 7:21 pm CDT.
Sunshine
In September, the average sunshine is 9h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 5 during September translates into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Sumner have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Sumner have in September?
What is the UV index reading in September?
Average temperature in September
Sumner, NE
- Average high temperature in September: 78.6°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in September: 56.1°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in September
Sumner, NE
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Sumner, NE
- Average wind speed in September: 9.9mph
The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest month (with the lowest average wind speed) is July (8.8mph).
Average humidity in September
Sumner, NE
- Average humidity in September: 61%
The month with the highest relative humidity is January (75%).
The month with the lowest relative humidity is October (58%).
Average rainfall in September
Sumner, NE
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in September
Sumner, NE
- Average rainfall days in September: 9.8 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (3.9 days).
Average snowfall in September
Sumner, NE
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Sumner, NE
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sumner, NE
- Average daylight in September: 12h and 3min
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: 9h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 54min).
Average sunshine days in September
Sumner, NE
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in September
Sumner, 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
Sumner, NE
- Average cloud cover in September: 22
The month with the most cloud cover is February (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 22).
Average visibility in September
Sumner, 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).
Sumner, Nebraska, USA
Weather forecast for your location
2. Allow the app to use your location