September weather forecast
Caledonia, MN

Weather in September

The first month of the autumn, September, is still a pleasant month in Caledonia, Minnesota, with an average temperature fluctuating between 51.3°F (10.7°C) and 71.1°F (21.7°C).

Temperature

In Caledonia, the average high-temperature in September marginally drops from a moderately hot 77.9°F (25.5°C) in August to an agreeable 71.1°F (21.7°C). The average low-temperature, in Caledonia, is 51.3°F (10.7°C).

Humidity

In Caledonia, the average relative humidity in September is 80%.

Rainfall

In Caledonia, Minnesota, in September, during 12.1 rainfall days, 2.2" (56mm) of precipitation is typically accumulated. In Caledonia, during the entire year, the rain falls for 130.5 days and collects up to 26.5" (673mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in September is 12h and 29min.
On the first day of September in Caledonia, sunrise is at 6:30 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:49 pm CDT.

Sunshine

In Caledonia, the average sunshine in September is 8.7h.

UV index

In Caledonia, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 3 in September interpret into the following advice:
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. 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 average humidity in September in Caledonia?

In September, the average relative humidity in Caledonia is 80%.

How many days does it rain in September in Caledonia?

In Caledonia, Minnesota, in September, during 12.1 rainfall days, 2.2" (56mm) of precipitation is typically accumulated.

When it does not snow in Caledonia?

June through September are months without snowfall.

Does it snow in Caledonia in September?

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

What is the average length of the day in September in Caledonia?

In Caledonia, the average day length in September is 12h and 29min.

When are sunrise and sunset in September in Caledonia?

On the first day of September in Caledonia, Minnesota, sunrise is at 6:30 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:49 pm CDT.

How many hours of sunshine does Caledonia have in September?

The average sunshine duration in September in Caledonia is 8.7h.

What is the UV index reading in September in Caledonia?

In September, the average daily maximum UV index in Caledonia is 3. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to 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
Caledonia, MN

Average temperature in September - Caledonia, MN
  • Average high temperature in September: 71.1°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (21.7°F).

  • Average low temperature in September: 51.3°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (8.8°F).

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Average pressure in September
Caledonia, MN

Average pressure in September - Caledonia, MN
  • Average pressure in September: 30.02"Hg

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

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Average wind speed in September
Caledonia, MN

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

The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).

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Average humidity in September
Caledonia, MN

Average humidity in September - Caledonia, 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
Caledonia, MN

Average rainfall in September - Caledonia, MN
  • Average rainfall in September: 2.2"

The wettest month (with the highest rainfall) is June (4.61").
The driest month (with the least rainfall) is January (0.87").

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Average rainfall days in September
Caledonia, MN

Average rainfall days in September - Caledonia, MN
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is June (18 days).
The month with the least rainy days is February (3 days).

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Average snowfall in September
Caledonia, MN

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

The month with the highest snowfall is February (5.71").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Caledonia, MN

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

The month with the highest number of snowfall days is January (12 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
Caledonia, MN

Average daylight in September / Average sunshine in September - Caledonia, MN
  • Average daylight in September: 12h and 29min

The month with the longest days is June (Average daylight: 15h and 23min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in September: 8h and 42min

The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).

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Average sunshine days in September
Caledonia, MN

Average sunshine days in September - Caledonia, MN
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is January (17.7 days).
The month with the least sunshine days is June (9.8 days).

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Average UV index in September
Caledonia, MN

Average UV index in September - Caledonia, MN
  • Average UV index in September: 3

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
Caledonia, MN

Average cloud cover in September - Caledonia, MN
  • Average cloud cover in September: 35

The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in September
Caledonia, MN

Average visibility in September - Caledonia, 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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