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
With the onset of September, Lewiston's average high-temperature slightly adjusts, moderately receding from August's warm 84°F (28.9°C) to a still moderately hot 77.9°F (25.5°C). An average temperature of 58.1°F (14.5°C) marks the nights in Lewiston in September.Humidity
In Lewiston, the average relative humidity in September is 71%.Rainfall
In September, the rain falls for 10.5 days. Throughout September, 1.22" (31mm) of precipitation is accumulated. In Lewiston, during the entire year, the rain falls for 105 days and collects up to 15.94" (405mm) of precipitation.Snowfall
May through September are months without snowfall in Lewiston.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:53 am and sunset at 7:56 pm. On the last day of September, in Lewiston, Nebraska, sunrise is at 7:21 am and sunset at 7:08 pm CDT.
Sunshine
The average sunshine in September in Lewiston, Nebraska, is 9.1h.UV index
In Lewiston, Nebraska, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 5 during September leads to these instructions:
Exercise prevention - Warding off sunburn is urged. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the temperature in September in Lewiston?
What is the average humidity in September in Lewiston?
How much does it rain in Lewiston in September?
When it does not snow in Lewiston?
Does it snow in Lewiston in September?
What is the average length of the day in September in Lewiston?
When are sunrise and sunset in September in Lewiston?
How many hours of sunshine does Lewiston have in September?
What is the UV index reading in September in Lewiston?
Average temperature in September
Lewiston, NE
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in September: 58.1°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure in September
Lewiston, NE
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Lewiston, NE
- Average wind speed in September: 8.5mph
The windiest months (with the highest average wind speed) are March and April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.3mph).
Average humidity in September
Lewiston, NE
- Average humidity in September: 71%
The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is October (66%).
Average rainfall in September
Lewiston, NE
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is May (2.83").
The driest months (with the least rainfall) are January and February (0.35").
Average rainfall days in September
Lewiston, NE
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is February (3 days).
Average snowfall in September
Lewiston, NE
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.1").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Lewiston, NE
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (6.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Lewiston, NE
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in September
Lewiston, NE
- Average sunshine days in September: 17.8 days
The month with the most sunshine days is November (24.2 days).
The month with the least sunshine days is May (13.8 days).
Average UV index in September
Lewiston, 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
Lewiston, NE
- Average cloud cover in September: 27
The months with the most cloud cover are January and March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in September
Lewiston, 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).
Lewiston, Nebraska, USA
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