September weather forecastWillow Island, NE
September
Weather in September
September, the first month of the autumn in Willow Island, is also a moderately hot month, with temperature in the range of an average low of 56.1°F (13.4°C) and an average high of 78.6°F (25.9°C).Temperature
Willow Island's progression into September involves a gentle drop in the average high-temperature, from a tropical 86.5°F (30.3°C) in August to a warm 78.6°F (25.9°C). In the month of September, Willow Island witnesses a marked temperature drop at night, averaging a low of 56.1°F (13.4°C).Humidity
The average relative humidity in September is 59%.Rainfall
In Willow Island, in September, during 10.3 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, there are 109.4 rainfall days, and 17.28" (439mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 7:07 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 7:23 pm CDT.
Sunshine
In Willow Island, the average sunshine in September is 9h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In September, the maximum UV index of 5 translates into these guidelines:
Undertake precautions - Obligation exists to protect against skin and eye damage. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Willow Island, NE
- Average high temperature in September: 78.6°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in September: 56.1°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in September
Willow Island, NE
- Average pressure in September: 29.96"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
Willow Island, NE
- Average wind speed in September: 10.3mph
The windiest month (with the highest average wind speed) is April (12.3mph).
The calmest month (with the lowest average wind speed) is July (9.2mph).
Average humidity in September
Willow Island, NE
- Average humidity in September: 59%
The month with the highest relative humidity is January (74%).
The month with the lowest relative humidity is October (58%).
Average rainfall in September
Willow Island, NE
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in September
Willow Island, NE
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Willow Island, NE
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Willow Island, NE
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are February and December (6.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Willow Island, NE
- Average daylight in September: 12h and 30min
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
The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is January (Average sunshine: 6h).
Average sunshine days in September
Willow Island, NE
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is November (22.9 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in September
Willow Island, 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
Willow Island, 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
Willow Island, 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).
