September weather forecastAllen, NE
September
Weather in September
September, the first month of the autumn in Allen, is still a warm month, with an average temperature fluctuating between 55°F (12.8°C) and 76.1°F (24.5°C).Temperature
In Allen, entering September brings a subtle temperature decrement, reducing from August's 82.2°F (27.9°C) to a still warm 76.1°F (24.5°C). Allen, in the month of September, anticipates a consistent average low-temperature of 55°F (12.8°C).Humidity
The average relative humidity in September is 69%.Rainfall
In Allen, in September, during 11.8 rainfall days, 1.65" (42mm) of precipitation is typically accumulated. Throughout the year, there are 120.7 rainfall days, and 20.31" (516mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 6:53 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:09 pm CDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 5 during September leads to these advisories:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Allen, NE
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in September: 55°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in September
Allen, NE
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Allen, NE
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is April (11.4mph).
The calmest month (with the lowest average wind speed) is July (7.9mph).
Average humidity in September
Allen, NE
- Average humidity in September: 69%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (65%).
Average rainfall in September
Allen, NE
- Average rainfall in September: 1.65"
The wettest months (with the highest rainfall) are May and June (2.91").
The driest months (with the least rainfall) are January and February (0.67").
Average rainfall days in September
Allen, NE
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (2.8 days).
Average snowfall in September
Allen, NE
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.11").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Allen, NE
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Allen, NE
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in September
Allen, NE
- Average sunshine days in September: 16 days
The month with the most sunshine days is November (22.2 days).
The month with the least sunshine days is June (10.8 days).
Average UV index in September
Allen, NE
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Allen, NE
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
Allen, 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).
