September weather forecast
New Munster, WI

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Weather in September

September, the first month of the autumn in New Munster, is also an agreeable month, with an average temperature varying between 55°F (12.8°C) and 71.6°F (22°C).

Temperature

The move into September indicates a slight reduction in the average high-temperature, down from August's warm 77.5°F (25.3°C) to an agreeable 71.6°F (22°C). In New Munster, an average nighttime temperature of 55°F (12.8°C) is expected during September.

Humidity

The average relative humidity in September is 80%.

Rainfall

In New Munster, during September, the rain falls for 12.5 days and regularly aggregates up to 1.89" (48mm) of precipitation. Throughout the year, there are 139.6 rainfall days, and 26.18" (665mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In September, the average length of the day is 12h and 29min.
On the first day of the month, sunrise is at 6:18 am and sunset at 7:26 pm. On the last day of September, sunrise is at 6:49 am and sunset at 6:35 pm CDT.

Sunshine

In September, the average sunshine is 8.9h.

UV index

In September, the average daily maximum UV index in New Munster is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily high UV index of 4 in September translates into this advice:
Put precautions into practice - Guidance to elude sunburn is provided. When the Sun is at its strongest around midday, find shade and limit exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Updated: Jul 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

In September, the average high-temperature and low-temperature are 71.6°F (22°C) and 55°F (12.8°C) respectively.

What is the average humidity in September?

The average relative humidity in September is 80%.

How many days does it rain in September?

In New Munster, during September, the rain falls for 12.5 days and regularly aggregates up to 1.89" (48mm) of precipitation.

When it does not snow?

In New Munster, snow does not fall in June through September.

Does it snow in New Munster in September?

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

How many hours of daylight does New Munster have in September?

The average day length in September is 12h and 29min.

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:18 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:35 pm CDT.

How long on average sun shines in September in New Munster?

In New Munster, the average sunshine duration in September is 8.9h.

What is the UV index reading in September?

In New Munster, 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 unprotected exposure to UV radiation.
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
New Munster, WI

Average temperature in September - New Munster, WI
  • Average high temperature in September: 71.6°F

The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (26.2°F).

  • Average low temperature in September: 55°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).

Average pressure in September
New Munster, WI

Average pressure in September - New Munster, WI
  • Average pressure in September: 30.03"Hg

The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in September
New Munster, WI

Average wind speed in September - New Munster, WI
  • Average wind speed in September: 7.5mph

The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

Average humidity in September
New Munster, WI

Average humidity in September - New Munster, WI
  • Average humidity in September: 80%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (76%).

Average rainfall in September
New Munster, WI

Average rainfall in September - New Munster, WI
  • Average rainfall in September: 1.89"

The wettest month (with the highest rainfall) is June (3.54").
The driest month (with the least rainfall) is December (1.06").

Average rainfall days in September
New Munster, WI

Average rainfall days in September - New Munster, WI
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is February (3.4 days).

Average snowfall in September
New Munster, WI

Average snowfall in September - New Munster, WI
  • Average snowfall in September: 0"

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

Average snowfall days in September
New Munster, WI

Average snowfall days in September - New Munster, WI
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
New Munster, WI

Average daylight in September / Average sunshine in September - New Munster, WI
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in September: 8h and 5min

The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The months with the least sunshine are January and February (Average sunshine: 3h and 36min).

Average sunshine days in September
New Munster, WI

Average sunshine days in September - New Munster, WI
  • Average sunshine days in September: 14.6 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (9.9 days).

Average UV index in September
New Munster, WI

Average UV index in September - New Munster, WI
  • Average UV index in September: 4

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

Average cloud cover in September
New Munster, WI

Average cloud cover in September - New Munster, WI
  • Average cloud cover in September: 32

The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July, August and September (Cloud cover 32).

Average visibility in September
New Munster, WI

Average visibility in September - New Munster, WI
  • Average visibility in September: 6mi

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

New Munster, Wisconsin, USA

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