September weather forecast and climate
Sumner, NE

Weather in September

September, the first month of the autumn, in Sumner, is still a warm month, with average temperature varying between 78.6°F (25.9°C) and 56.1°F (13.4°C).

Temperature

In Sumner, the average high-temperature marginally drops, from a hot 86.2°F (30.1°C) in August, to a warm 78.6°F (25.9°C). In September, in Sumner, the average low-temperature is 56.1°F (13.4°C).

Humidity

In September, the average relative humidity is 61%.

Rainfall

In Sumner, during 9.8 rainfall days, 0.94" (24mm) of precipitation is typically accumulated. Throughout the year, there are 117 rainfall days, and 18.35" (466mm) of precipitation is accumulated.

Snowfall

In Sumner, Nebraska, snow does not fall in June through September.

Daylight

In September, the average length of the day in Sumner, Nebraska, is 12.4h.

Sunshine

In September, the average sunshine in Sumner is 9h.

UV index

The average daily maximum UV index in Sumner is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Sumner?

In September, the average high-temperature is 78.6°F (25.9°C), and the average low-temperature is 56.1°F (13.4°C).

What is the average humidity in September in Sumner?

In September, the average relative humidity in Sumner is 61%.

How many days does it rain in September in Sumner?

In Sumner, during September, the rain falls for 9.8 days and regularly aggregates up to 0.94" (24mm) of precipitation.

Does it snow in Sumner in September?

In Sumner, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Sumner?

In Sumner snow does not fall in June through September.

How many hours of daylight does Sumner have in September?

The average length of the day in September in Sumner is 12.4h.

How many hours of sunshine does Sumner have in September?

In Sumner, Nebraska, the average sunshine in September is 9h.

What is the UV index reading in September in Sumner?

In September, the average daily maximum UV index in Sumner, Nebraska, is 5. A UV Index reading of 3 to 5 represents a medium health risk from unsafe exposure to the Sun's UV rays.

Average temperature in September
Sumner, NE

Average temperature in September - Sumner, NE
  • Average high temperature in September: 78.6°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (35.8°F).

  • Average low temperature in September: 56.1°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (21°F).

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Average pressure in September
Sumner, NE

Average pressure in September - Sumner, NE
  • Average pressure in September: 29.97"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.84").

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Average wind speed in September
Sumner, NE

Average wind speed in September - Sumner, NE
  • Average wind speed in September: 9.9mph

The windiest month (with the highest average wind speed) is April (11.9mph).
The calmest month (with the lowest average wind speed) is July (8.8mph).

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Average humidity in September
Sumner, NE

Average humidity in September - Sumner, NE
  • Average humidity in September: 61%

The month with the highest relative humidity is January (75%).
The month with the lowest relative humidity is October (58%).

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Average rainfall in September
Sumner, NE

Average rainfall in September - Sumner, NE
  • Average rainfall in September: 0.94"

The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is January (0.51").

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Average rainfall days in September
Sumner, NE

Average rainfall days in September - Sumner, NE
  • Average rainfall days in September: 9.8 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (3.9 days).

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Average snowfall in September
Sumner, NE

Average snowfall in September - Sumner, NE
  • Average snowfall in September: 0"

The month with the highest snowfall is February (3.62").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Sumner, NE

Average snowfall days in September - Sumner, NE
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (7.6 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
Sumner, NE

Average daylight in September / Average sunshine in September - Sumner, 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: 9h

The month with the most sunshine is July (Average sunshine: 11.1h).
The month with the least sunshine is January (Average sunshine: 5.9h).

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Average sunshine days in September
Sumner, NE

Average sunshine days in September - Sumner, NE
  • Average sunshine days in September: 16.8 days

The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is June (11.2 days).

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Average UV index in September
Sumner, NE

Average UV index in September - Sumner, 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
Sumner, NE

Average cloud cover in September - Sumner, NE
  • Average cloud cover in September: 22

The month with the most cloud cover is February (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 22).

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Average visibility in September
Sumner, NE

Average visibility in September - Sumner, NE
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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