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 arrival of September corresponds with a light shift in temperature, down from 82°F (27.8°C) in August to a still warm 76.1°F (24.5°C). McLean's average low-temperature is measured at a fresh 55°F (12.8°C) during September.Humidity
The average relative humidity in September is 68%.Rainfall
In McLean, during September, the rain falls for 10.8 days and regularly aggregates up to 1.54" (39mm) of precipitation. Throughout the year, in McLean, there are 115.7 rainfall days, and 19.61" (498mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in McLean is 12h and 28min.On the first day of the month, sunrise is at 6:55 am and sunset at 8:03 pm. On the last day of September, in McLean, sunrise is at 7:26 am and sunset at 7:12 pm CDT.
Sunshine
In September, the average sunshine in McLean is 8.8h.UV index
In McLean, 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 exposure to the Sun's UV rays for the ordinary person.Note: In September, an average UV index of 5 transforms into the following instructions:
Prioritize safety - Suggestions to prevent sun damage are offered. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Frequently asked questions
What is the average September temperature in McLean?
What is the average humidity in September in McLean?
How much does it rain in McLean in September?
When it does not snow in McLean?
Does it snow in McLean in September?
How many hours of daylight does McLean have in September?
What time are sunrise and sunset in September in McLean?
How long on average sun shines in September in McLean?
What is the UV index intensity in September in McLean?
Average temperature in September
McLean, NE
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (28.6°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 (15.3°F).
Average pressure in September
McLean, 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
McLean, NE
- Average wind speed in September: 9.4mph
The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in September
McLean, NE
- Average humidity in September: 68%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (64%).
Average rainfall in September
McLean, NE
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is May (2.83").
The driest months (with the least rainfall) are February and November (0.59").
Average rainfall days in September
McLean, NE
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is January (2.7 days).
Average snowfall in September
McLean, NE
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.23").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
McLean, NE
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
McLean, NE
- Average daylight in September: 12h and 3min
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 5min
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
McLean, NE
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is June (11.5 days).
Average UV index in September
McLean, 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
McLean, NE
- Average cloud cover in September: 28
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
McLean, 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).
McLean, Nebraska, USA
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