September weather forecast
Winona, MN

Weather in September

September, the first month of the autumn in Winona, is still a pleasant month, with temperature in the range of an average high of 70.7°F (21.5°C) and an average low of 51.3°F (10.7°C).

Temperature

In Winona, Minnesota, the average high-temperature in September slightly decreases from a moderately hot 77°F (25°C) in August to a pleasant 70.7°F (21.5°C). In Winona, Minnesota, in September, the average low-temperature is 51.3°F (10.7°C).

Humidity

In September, the average relative humidity is 80%.

Rainfall

In Winona, during September, the rain falls for 12.8 days and regularly aggregates up to 2.09" (53mm) of precipitation. In Winona, during the entire year, the rain falls for 132.9 days and collects up to 24.88" (632mm) of precipitation.

Snowfall

June through September are months without snowfall in Winona, Minnesota.

Daylight

In Winona, the average length of the day in September is 12h and 30min.
On the first day of the month, sunrise is at 6:30 am and sunset at 7:43 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:49 pm CDT.

Sunshine

In September, the average sunshine is 8.6h.

UV index

In Winona, Minnesota, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 4 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. 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.
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FAQ

What is the average humidity in September in Winona?

The average relative humidity in September in Winona, Minnesota, is 80%.

How much does it rain in Winona in September?

In Winona, Minnesota, in September, during 12.8 rainfall days, 2.09" (53mm) of precipitation is typically accumulated.

When it does not snow in Winona?

June through September are months without snowfall in Winona, Minnesota.

Does it snow in Winona in September?

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

How many hours of daylight does Winona have in September?

The average day length in September in Winona, Minnesota, is 12h and 30min.

What time are sunrise and sunset in September in Winona?

In September, on the first day of the month, sunrise is at 6:30 am and sunset at 7:43 pm. On the last day of the month, in Winona, sunrise is at 7:03 am and sunset at 6:49 pm CDT.

How many hours of sunshine does Winona have in September?

In Winona, the average sunshine duration in September is 8.6h.

How high is the UV index in September in Winona?

The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Winona, MN

Average temperature in September - Winona, MN
  • Average high temperature in September: 70.7°F

The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (20.8°F).

  • Average low temperature in September: 51.3°F

The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).

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Average pressure in September
Winona, MN

Average pressure in September - Winona, MN
  • Average pressure in September: 30.01"Hg

The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in September
Winona, MN

Average wind speed in September - Winona, MN
  • Average wind speed in September: 7.4mph

The windiest month (with the highest average wind speed) is April (9.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).

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Average humidity in September
Winona, MN

Average humidity in September - Winona, MN
  • Average humidity in September: 80%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is October (76%).

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Average rainfall in September
Winona, MN

Average rainfall in September - Winona, MN
  • Average rainfall in September: 2.09"

The wettest month (with the highest rainfall) is June (4.49").
The driest month (with the least rainfall) is January (0.67").

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Average rainfall days in September
Winona, MN

Average rainfall days in September - Winona, MN
  • Average rainfall days in September: 12.8 days

The month with the highest number of rainy days is June (18.7 days).
The month with the least rainy days is February (2.3 days).

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Average snowfall in September
Winona, MN

Average snowfall in September - Winona, MN
  • Average snowfall in September: 0"

The month with the highest snowfall is February (5.55").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Winona, MN

Average snowfall days in September - Winona, MN
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (11.1 days).
The 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
Winona, MN

Average daylight in September / Average sunshine in September - Winona, MN
  • Average daylight in September: 12h and 30min

The month with the longest days is June (Average daylight: 15h and 26min).
The month with the shortest days is December (Average daylight: 8h and 57min).

  • Average sunshine in September: 8h and 36min

The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).

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Average sunshine days in September
Winona, MN

Average sunshine days in September - Winona, MN
  • Average sunshine days in September: 15 days

The month with the most sunshine days is December (18.4 days).
The month with the least sunshine days is June (9.4 days).

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Average UV index in September
Winona, MN

Average UV index in September - Winona, MN
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).

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Average cloud cover in September
Winona, MN

Average cloud cover in September - Winona, MN
  • Average cloud cover in September: 36

The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in September
Winona, MN

Average visibility in September - Winona, MN
  • Average visibility in September: 5mi

The months with the highest visibility are April, May, June, October and November (6mi).
The months with the lowest visibility are January, February, March, July, August, September and December (5mi).

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