September weather forecast and climate
Grand Island, NE

Weather in September

The first month of the autumn, September, is still a warm month in Grand Island, Nebraska, with temperature in the range of an average low of 56.7°F (13.7°C) and an average high of 78.3°F (25.7°C).

Temperature

In September, the average high-temperature slightly decreases, from a moderately hot 85.1°F (29.5°C) in August, to a still warm 78.3°F (25.7°C). In September, the average low-temperature is 56.7°F (13.7°C).

Humidity

In Grand Island, Nebraska, the average relative humidity is 66%.

Rainfall

In Grand Island, during September, the rain falls for 10.7 days and regularly aggregates up to 1.34" (34mm) of precipitation. Throughout the year, there are 109.5 rainfall days, and 19.37" (492mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Grand Island.

Daylight

In Grand Island, Nebraska, the average length of the day is 12.4h.

Sunshine

In Grand Island, the average sunshine is 8.6h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Grand Island?

In September, in Grand Island, Nebraska, the average high-temperature is 78.3°F (25.7°C), and the average low-temperature is 56.7°F (13.7°C).

What is the average humidity in September in Grand Island?

The average relative humidity in September in Grand Island is 66%.

How many days does it rain in September in Grand Island?

In September, in Grand Island, the rain falls for 10.7 days. Throughout September, 1.34" (34mm) of precipitation is accumulated.

Does it snow in Grand Island in September?

In Grand Island, Nebraska, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Grand Island?

In Grand Island snow does not fall in June through September.

How many hours of daylight does Grand Island have in September?

In Grand Island, the average length of the day in September is 12.4h.

How long on average sun shines in September in Grand Island?

The average sunshine in September in Grand Island is 8.6h.

How high is the UV index in September in Grand Island?

The average daily maximum UV index in September in Grand Island is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Grand Island, NE

Average temperature in September - Grand Island, NE
  • Average high temperature in September: 25.7°C

The warmest month (with the highest average high temperature) is July (30.4°C).
The month with the lowest average high temperature is January (0.8°C).

  • Average low temperature in September: 13.7°C

The month with the highest average low temperature is July (18.8°C).
The coldest month (with the lowest average low temperature) is January (-7.2°C).

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Average pressure in September
Grand Island, NE

Average pressure in September - Grand Island, NE
  • Average pressure in September: 1015.2mbar

The month with the highest atmospheric pressure is January (1021.7mbar).
The month with the lowest atmospheric pressure is June (1010.9mbar).

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Average wind speed in September
Grand Island, NE

Average wind speed in September - Grand Island, NE
  • Average wind speed in September: 15.3km/h

The windiest month (with the highest average wind speed) is April (18.7km/h).
The calmest month (with the lowest average wind speed) is July (12.9km/h).

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Average humidity in September
Grand Island, NE

Average humidity in September - Grand Island, NE
  • Average humidity in September: 66%

The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is October (61%).

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Average rainfall in September
Grand Island, NE

Average rainfall in September - Grand Island, NE
  • Average rainfall in September: 34mm

The wettest month (with the highest rainfall) is May (83mm).
The driest month (with the least rainfall) is January (13mm).

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Average rainfall days in September
Grand Island, NE

Average rainfall days in September - Grand Island, NE
  • Average rainfall days in September: 10.7 days

The month with the highest number of rainy days is May (15 days).
The month with the least rainy days is February (1.7 days).

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Average snowfall in September
Grand Island, NE

Average snowfall in September - Grand Island, NE
  • Average snowfall in September: 0mm

The month with the highest snowfall is December (82mm).
Months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days in September
Grand Island, NE

Average snowfall days in September - Grand Island, NE
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (6.3 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Grand Island, NE

Average daylight in September / Average sunshine in September - Grand Island, NE
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 8.6h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is January (Average sunshine: 5.4h).

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Average sunshine days in September
Grand Island, NE

Average sunshine days in September - Grand Island, NE
  • Average sunshine days in September: 17.2 days

The month with the most sunshine days is November (22.9 days).
The month with the least sunshine days is June (13.6 days).

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Average UV index in September
Grand Island, NE

Average UV index in September - Grand Island, NE
  • Average UV index in September: 5

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in September
Grand Island, NE

Average cloud cover in September - Grand Island, NE
  • Average cloud cover in September: 27

The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in September
Grand Island, NE

Average visibility in September - Grand Island, NE
  • Average visibility in September: 9km

Months with the highest visibility are June, October and November (10km).
Months with the lowest visibility are January, February, March, April, May, July, August, September and December (9km).

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