September weather forecast
Garrison, MN

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Weather in September

The first month of the autumn, September, is also an agreeable month in Garrison, Minnesota, with an average temperature fluctuating between 49.5°F (9.7°C) and 68.7°F (20.4°C).

Temperature

In September, the meteorological conditions change slightly, with the average high-temperature moving from a warm 76.8°F (24.9°C) in August to a pleasant 68.7°F (20.4°C). The average temperature during September nights in Garrison is registered at a chilly 49.5°F (9.7°C).

Humidity

In September, the average relative humidity is 75%.

Rainfall

In September, the rain falls for 10.2 days. Throughout September, 1.26" (32mm) of precipitation is accumulated. In Garrison, during the entire year, the rain falls for 109.6 days and collects up to 15.83" (402mm) of precipitation.

Snowfall

June through September are months without snowfall in Garrison.

Daylight

In Garrison, the average length of the day in September is 12h and 32min.
On the first day of September, sunrise is at 6:36 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 6:56 pm CDT.

Sunshine

In September, the average sunshine in Garrison is 8.6h.

UV index

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: In September, the maximum UV index of 4 transforms into these recommendations:
Be vigilant - Preventing sunburn is recommended. To avoid the Sun's strongest rays, limit exposure around the mid-day period. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Garrison in September?

September temperatures vary between a high-temperature of 68.7°F (20.4°C) and a low-temperature of 49.5°F (9.7°C).

What is the average humidity in September?

In September, the average relative humidity is 75%.

How much does it rain in September?

In Garrison, during September, the rain falls for 10.2 days and regularly aggregates up to 1.26" (32mm) of precipitation.

When it does not snow?

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

Does it snow in September?

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

What is the average length of the day in September?

The average day length in September is 12h and 32min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:36 am and sunset at 7:53 pm. On the last day of the month, in Garrison, sunrise is at 7:13 am and sunset at 6:56 pm CDT.

How many hours of sunshine does Garrison have in September?

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

How high is the UV index in September?

The average daily maximum UV index in September in Garrison is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health from 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
Garrison, MN

Average temperature in September - Garrison, MN
  • Average high temperature in September: 68.7°F

The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (17.4°F).

  • Average low temperature in September: 49.5°F

The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (4.3°F).

Average pressure in September
Garrison, MN

Average pressure in September - Garrison, MN
  • Average pressure in September: 29.99"Hg

The month with the highest atmospheric pressure is February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

Average wind speed in September
Garrison, MN

Average wind speed in September - Garrison, MN
  • Average wind speed in September: 7.8mph

The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).

Average humidity in September
Garrison, MN

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

The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (72%).

Average rainfall in September
Garrison, MN

Average rainfall in September - Garrison, MN
  • Average rainfall in September: 1.26"

The wettest month (with the highest rainfall) is June (2.36").
The driest month (with the least rainfall) is January (0.35").

Average rainfall days in September
Garrison, MN

Average rainfall days in September - Garrison, MN
  • Average rainfall days in September: 10.2 days

The month with the highest number of rainy days is June (15.2 days).
The month with the least rainy days is February (2.4 days).

Average snowfall in September
Garrison, MN

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

The month with the highest snowfall is December (4.41").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Garrison, MN

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

The month with the highest number of snowfall days is January (17.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Garrison, MN

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

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).

Average sunshine days in September
Garrison, MN

Average sunshine days in September - Garrison, MN
  • Average sunshine days in September: 17.4 days

The month with the most sunshine days is October (18.1 days).
The month with the least sunshine days is June (11 days).

Average UV index in September
Garrison, MN

Average UV index in September - Garrison, 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).

Average cloud cover in September
Garrison, MN

Average cloud cover in September - Garrison, MN
  • Average cloud cover in September: 37

The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is July (Cloud cover 33).

Average visibility in September
Garrison, MN

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

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

Garrison, Minnesota, USA

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