September weather forecast
Germantown, WI

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Weather in September

The first month of the autumn, September, is also an agreeable month in Germantown, Wisconsin, with an average temperature ranging between min 55.4°F (13°C) and max 70°F (21.1°C).

Temperature

September implies a soft temperature shift, with average high-temperatures reducing from August's warm 76.6°F (24.8°C) to a pleasant 70°F (21.1°C). The average temperature during September nights is registered at a refreshing 55.4°F (13°C).

Humidity

In September, the average relative humidity is 79%.

Rainfall

In Germantown, in September, during 12.4 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. In Germantown, during the entire year, the rain falls for 139.2 days and collects up to 25.28" (642mm) of precipitation.

Snowfall

In Germantown, snow does not fall in May through September.

Daylight

In Germantown, the average length of the day in September is 12h and 29min.
On the first day of the month, sunrise is at 6:17 am and sunset at 7:26 pm. On the last day of September, sunrise is at 6:49 am and sunset at 6:34 pm CDT.

Sunshine

In Germantown, the average sunshine in September is 9.2h.

UV index

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 4 in September transforms into the following instructions:
Act with care - The suggestion to avoid sunburn is emphasized. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Always opt for UVA and UVB-resistant sunglasses on radiant days.

Frequently asked questions

What are the temperatures in September?

In September, in Germantown, the average high-temperature is 70°F (21.1°C), and the average low-temperature is 55.4°F (13°C).

What is the average humidity in September?

The average relative humidity in September is 79%.

How much does it rain in September?

In Germantown, Wisconsin, in September, it is raining for 12.4 days, with typically 2.17" (55mm) of accumulated precipitation.

When it does not snow?

In Germantown, snow does not fall in May through September.

Does it snow in September?

In Germantown, 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 29min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:17 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:34 pm CDT.

How long on average sun shines in September?

In September, the average sunshine duration is 9.2h.

What is the UV index intensity in September in Germantown?

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health risk 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
Germantown, WI

Average temperature in September - Germantown, WI
  • Average high temperature in September: 70°F

The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (25.2°F).

  • Average low temperature in September: 55.4°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 (14.4°F).

Average pressure in September
Germantown, WI

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

The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in September
Germantown, WI

Average wind speed in September - Germantown, WI
  • Average wind speed in September: 8.2mph

The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

Average humidity in September
Germantown, WI

Average humidity in September - Germantown, WI
  • Average humidity in September: 79%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (76%).

Average rainfall in September
Germantown, WI

Average rainfall in September - Germantown, WI
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is February (1.02").

Average rainfall days in September
Germantown, WI

Average rainfall days in September - Germantown, WI
  • Average rainfall days in September: 12.4 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (4.1 days).

Average snowfall in September
Germantown, WI

Average snowfall in September - Germantown, WI
  • Average snowfall in September: 0"

The month with the highest snowfall is January (4.02").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
Germantown, WI

Average snowfall days in September - Germantown, WI
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (12.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Germantown, WI

Average daylight in September / Average sunshine in September - Germantown, 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 0min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

Average sunshine days in September
Germantown, WI

Average sunshine days in September - Germantown, WI
  • Average sunshine days in September: 15.4 days

The month with the most sunshine days is December (15.9 days).
The month with the least sunshine days is April (12 days).

Average UV index in September
Germantown, WI

Average UV index in September - Germantown, WI
  • 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, November and December (UV index 1).

Average cloud cover in September
Germantown, WI

Average cloud cover in September - Germantown, WI
  • Average cloud cover in September: 29

The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 28).

Average visibility in September
Germantown, WI

Average visibility in September - Germantown, WI
  • Average visibility in September: 6mi

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

Germantown, Wisconsin, USA

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