Eagle River
Wisconsin, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Eagle River, WI

September, the first month of the autumn, in Eagle River, is still a comfortable month, with average temperature fluctuating between 48°F (8.9°C) and 66.7°F (19.3°C).

Temperature

In September, the average high-temperature marginally drops, from a moderately hot 74.5°F (23.6°C) in August, to an enjoyable 66.7°F (19.3°C). The average low-temperature, in Eagle River, is 48°F (8.9°C).

Humidity

In Eagle River, the average relative humidity is 80%.

Rainfall

In Eagle River, in September, during 12.1 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. In Eagle River, Wisconsin, during the entire year, the rain falls for 123.5 days and collects up to 23.11" (587mm) of precipitation.

Snowfall

In Eagle River snow does not fall in June through September.

Daylight

The average length of the day in Eagle River is 12.5h.

Sunshine

In September, the average sunshine is 7.6h.

UV index

The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in September in Eagle River?

The average high-temperature, in September, in Eagle River, Wisconsin, is 66.7°F (19.3°C), while the average low-temperature is 48°F (8.9°C).

What is the average humidity in September in Eagle River?

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

How many days does it rain in September in Eagle River?

In Eagle River, in September, it is raining for 12.1 days, with typically 1.57" (40mm) of accumulated precipitation.

Does it snow in Eagle River in September?

In Eagle River, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Eagle River?

In Eagle River, Wisconsin, snow does not fall in June through September.

How many hours of daylight does Eagle River have in September?

In September, the average length of the day is 12.5h.

How many hours of sunshine does Eagle River have in September?

The average sunshine in September in Eagle River is 7.6h.

How high is the UV index in September in Eagle River?

The average daily maximum UV index in September in Eagle River is 3. A UV Index of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to the UV radiation.
Average temperature in September - Eagle River, WI
  • Average high temperature in September: 66.7°F

The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is January (18.9°F).

  • Average low temperature in September: 48°F

The month with the highest average low temperature is July (56.1°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).

Average humidity in September - Eagle River, WI
  • Average humidity in September: 80%

Months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is May (71%).

Average rainfall in September - Eagle River, WI
  • Average rainfall in September: 1.57"

Wettest months (with the highest rainfall) are April and May (2.64").
The driest month (with the lowest rainfall) is January (1.26").

Average rainfall days in September - Eagle River, WI
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is June (15.8 days).
The month with the lowest number of rainy days is January (2.8 days).

Average snowfall in September - Eagle River, WI
  • Average snowfall in September: 0"

The month with the highest snowfall is December (9.69").
Months with the lowest snowfall are June, July, August and September (0").

Average snowfall days in September - Eagle River, WI
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is January (24.9 days).
Months with the lowest number of snowfall days are June, July and August (0 days).

Average daylight in September / Average sunshine in September - Eagle River, WI
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.7h).
The month with shortest days is December (Average daylight: 8.7h).

  • Average sunshine in September: 7.6h

The month with most sunshine is July (Average sunshine: 9.7h).
Months with least sunshine are January and February (Average sunshine: 2).

Average UV index in September - Eagle River, WI
  • Average UV index in September: 3

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