September weather forecast
Mankato, MN

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The roads and large bridge over the river leading to downtown Mankato, Minnesota
The roads and large bridge over the river leading to downtown Mankato, Minnesota

Weather in September

September in Mankato marks the transition from summer to autumn, with temperatures easing down to 72.5°F (22.5°C). The fall foliage enhances the city's scenery, transforming it into an artist's palette. Though the rainfall slightly increases, it doesn't reach the magnitude of the showers seen in the heart of summer. The slightly diminished visibility, consistent wind speed, and decreasing daylight hours collectively mark the cessation of the summer season and the inception of fall.

Temperature

The shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from a warm 78.3°F (25.7°C) to an agreeable 72.5°F (22.5°C). In September, Mankato's temperature tends to fall to an average low of 52.9°F (11.6°C) during the night.

Humidity

In September, the average relative humidity in Mankato is 75%.

Rainfall

In September, the rain falls for 11.5 days. Throughout September, 2.28" (58mm) of precipitation is accumulated. In Mankato, during the entire year, the rain falls for 124.9 days and collects up to 23.11" (587mm) of precipitation.

Snowfall

In Mankato, snow does not fall in June through September.

Daylight

In September, the average length of the day in Mankato is 12h and 30min.
On the first day of the month, sunrise is at 6:39 am and sunset at 7:51 pm. On the last day of September, in Mankato, sunrise is at 7:13 am and sunset at 6:58 pm CDT.

Sunshine

In September, the average sunshine is 8.9h.

UV index

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the maximum UV index of 4 translates into these guidelines:
Act with care - The suggestion to avoid sunburn is emphasized. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
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Frequently asked questions

What is the average September temperature in Mankato?

The average high-temperature and low-temperature during September are 72.5°F (22.5°C) and 52.9°F (11.6°C) respectively.

What is the average humidity in September in Mankato?

In Mankato, Minnesota, the average relative humidity in September is 75%.

How many days does it rain in September in Mankato?

In Mankato, Minnesota, in September, it is raining for 11.5 days, with typically 2.28" (58mm) of accumulated precipitation.

When it does not snow in Mankato?

In Mankato, Minnesota, snow does not fall in June through September.

Does it snow in Mankato in September?

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

How many hours of daylight does Mankato have in September?

In September, the average day length is 12h and 30min.

When are sunrise and sunset in September in Mankato?

On the first day of September in Mankato, Minnesota, sunrise is at 6:39 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 6:58 pm CDT.

How many hours of sunshine does Mankato have in September?

The average sunshine duration in September in Mankato, Minnesota, is 8.9h.

How high is the UV index in September in Mankato?

In Mankato, Minnesota, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Mankato, MN

Average temperature in September - Mankato, MN
  • Average high temperature in September: 72.5°F

The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (21.2°F).

  • Average low temperature in September: 52.9°F

The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (7.5°F).

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Average pressure in September
Mankato, MN

Average pressure in September - Mankato, MN
  • Average pressure in September: 30"Hg

The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in September
Mankato, MN

Average wind speed in September - Mankato, MN
  • Average wind speed in September: 8.2mph

The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

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Average humidity in September
Mankato, MN

Average humidity in September - Mankato, MN
  • Average humidity in September: 75%

The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and October (70%).

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Average rainfall in September
Mankato, MN

Average rainfall in September - Mankato, MN
  • Average rainfall in September: 2.28"

The wettest month (with the highest rainfall) is June (3.54").
The driest month (with the least rainfall) is January (0.71").

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Average rainfall days in September
Mankato, MN

Average rainfall days in September - Mankato, MN
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is February (2.7 days).

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Average snowfall in September
Mankato, MN

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

The month with the highest snowfall is December (4.33").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Mankato, MN

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

The month with the highest number of snowfall days is January (13.3 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
Mankato, MN

Average daylight in September / Average sunshine in September - Mankato, MN
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).

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Average sunshine days in September
Mankato, MN

Average sunshine days in September - Mankato, MN
  • Average sunshine days in September: 16.1 days

The month with the most sunshine days is October (18.3 days).
The month with the least sunshine days is June (10.8 days).

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Average UV index in September
Mankato, MN

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

The months with the highest UV index are June and 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
Mankato, MN

Average cloud cover in September - Mankato, MN
  • Average cloud cover in September: 33

The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 30).

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Average visibility in September
Mankato, MN

Average visibility in September - Mankato, MN
  • Average visibility in September: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).

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Mankato, Minnesota, USA

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