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
A minor decrease in the average high-temperature is observed during September, shifting from a moderately hot 84.7°F (29.3°C) in August to a still warm 77.9°F (25.5°C). Throughout September, Grafton witnesses a consistent average low-temperature of 57.6°F (14.2°C).Humidity
In Grafton, the average relative humidity in September is 68%.Rainfall
In September, the rain falls for 9 days. Throughout September, 0.71" (18mm) of precipitation is accumulated. Throughout the year, there are 80.5 rainfall days, and 8.03" (204mm) of precipitation is accumulated.Snowfall
In Grafton, snow does not fall in June through September.Daylight
In Grafton, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:58 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:27 am and sunset at 7:14 pm CDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In Grafton, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: In September, a regular UV index of 5 translates into these guidelines:
Take precautions. Light skin individuals may get burned in less than 30 minutes. When the Sun is at its strongest around midday, find shade and limit exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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 in Grafton?
Does it snow in September?
How many hours of daylight does Grafton have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Grafton, NE
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in September: 57.6°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in September
Grafton, 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
Grafton, 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 (8mph).
Average humidity in September
Grafton, NE
- Average humidity in September: 68%
The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is October (62%).
Average rainfall in September
Grafton, NE
- Average rainfall in September: 0.71"
The wettest months (with the highest rainfall) are May and June (1.26").
The driest month (with the least rainfall) is February (0.2").
Average rainfall days in September
Grafton, NE
- Average rainfall days in September: 9 days
The month with the highest number of rainy days is May (10.8 days).
The months with the least rainy days are January and February (1.9 days).
Average snowfall in September
Grafton, NE
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Grafton, NE
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grafton, 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 18min).
- Average sunshine in September: 8h and 3min
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 12min).
Average sunshine days in September
Grafton, NE
- Average sunshine days in September: 19 days
The months with the most sunshine days are January and December (25.6 days).
The month with the least sunshine days is June (16.3 days).
Average UV index in September
Grafton, 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
Grafton, NE
- Average cloud cover in September: 28
The months with the most cloud cover are January and March (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in September
Grafton, 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).
Grafton, Nebraska, USA
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