September weather forecast
Amherst Junction, WI

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Weather in September

The first month of the autumn, September, is also an agreeable month in Amherst Junction, Wisconsin, with an average temperature varying between 68.9°F (20.5°C) and 50.9°F (10.5°C).

Temperature

Amherst Junction's transition into September involves a gentle shift in temperature, receding from a warm 76.1°F (24.5°C) in August to an agreeable 68.9°F (20.5°C). Throughout September, an average nighttime temperature of 50.9°F (10.5°C) is experienced.

Humidity

In September, the average relative humidity is 80%.

Rainfall

In Amherst Junction, during September, the rain falls for 12.3 days and regularly aggregates up to 1.77" (45mm) of precipitation. Throughout the year, there are 123.2 rainfall days, and 23.54" (598mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In September, the average length of the day is 12h and 30min.
On the first day of September, sunrise is at 6:20 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:39 pm CDT.

Sunshine

In September, the average sunshine is 8.3h.

UV index

The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In September, a daily maximum UV index of 3 leads to the following instructions:
Ensure safety - Imperative it is to shield skin and eyes from damage. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.

Frequently asked questions

What are the temperatures in September?

The high-temperature in Amherst Junction during September is 68.9°F (20.5°C) and the low-temperature is 50.9°F (10.5°C).

What is the average humidity in September?

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

How much does it rain in September?

In Amherst Junction, during September, the rain falls for 12.3 days and regularly aggregates up to 1.77" (45mm) of precipitation.

When it does not snow?

In Amherst Junction, snow does not fall in June through September.

Does it snow in September?

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

What is the average length of the day in September?

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

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:20 am and sunset at 7:33 pm. On the last day of the month, in Amherst Junction, sunrise is at 6:54 am and sunset at 6:39 pm CDT.

How long on average sun shines in September?

In September, the average sunshine duration is 8.3h.

How high is the UV index in September?

The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health risk 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
Amherst Junction, WI

Average temperature in September - Amherst Junction, WI
  • Average high temperature in September: 68.9°F

The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is January (20.5°F).

  • Average low temperature in September: 50.9°F

The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is January (9°F).

Average pressure in September
Amherst Junction, WI

Average pressure in September - Amherst Junction, WI
  • Average pressure in September: 30.02"Hg

The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in September
Amherst Junction, WI

Average wind speed in September - Amherst Junction, WI
  • Average wind speed in September: 8mph

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (7.2mph).

Average humidity in September
Amherst Junction, WI

Average humidity in September - Amherst Junction, WI
  • Average humidity in September: 80%

The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is April (76%).

Average rainfall in September
Amherst Junction, WI

Average rainfall in September - Amherst Junction, WI
  • Average rainfall in September: 1.77"

The wettest month (with the highest rainfall) is June (3.23").
The driest month (with the least rainfall) is February (0.91").

Average rainfall days in September
Amherst Junction, WI

Average rainfall days in September - Amherst Junction, WI
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is January (2.8 days).

Average snowfall in September
Amherst Junction, WI

Average snowfall in September - Amherst Junction, WI
  • Average snowfall in September: 0"

The month with the highest snowfall is December (5.2").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Amherst Junction, WI

Average snowfall days in September - Amherst Junction, WI
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (14.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Amherst Junction, WI

Average daylight in September / Average sunshine in September - Amherst Junction, WI
  • 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 2min

The month with the most sunshine is July (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).

Average sunshine days in September
Amherst Junction, WI

Average sunshine days in September - Amherst Junction, WI
  • Average sunshine days in September: 16.5 days

The month with the most sunshine days is November (17 days).
The months with the least sunshine days are April, May and June (12.7 days).

Average UV index in September
Amherst Junction, WI

Average UV index in September - Amherst Junction, WI
  • Average UV index in September: 3

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).

Average cloud cover in September
Amherst Junction, WI

Average cloud cover in September - Amherst Junction, WI
  • Average cloud cover in September: 38

The month with the most cloud cover is January (Cloud cover 70).
The months with the least cloud cover are July and August (Cloud cover 36).

Average visibility in September
Amherst Junction, WI

Average visibility in September - Amherst Junction, WI
  • Average visibility in September: 6mi

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

Amherst Junction, Wisconsin, USA

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