Rhinelander Weather in September

What's the weather like in Rhinelander (Wisconsin) in September 2025?

The climate in Rhinelander during September can be summarized as mild and damp.

September is in the fall / autumn in Rhinelander and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a cool 19°C (65°F), whilst at night 7°C (44°F) is normal.

Rhinelander weather averages (imperial / metric)
Daytime temperature 18.6°C 65.4°F
Nightly temperature 6.5°C 43.6°F
Average temperature 12.5°C 54.5°F
Daily sunshine 7 hrs
Avg rainfall 103 mm 4.1 ins
Rainy days 12 days
Sea temperature 14.7°C 58.5°F
Humidity 78%
Windspeed 14kph 9 mph

On average September is the 2nd wettest month of the year in Rhinelander with around 103mm 4.1 inches of rain making it a damp time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.

On the flip side this corresponds to an average of 7 hours of sunshine per day.

September temperatures in Rhinelander

Rhinelander average temperature in September

September rainfall

Rhinelander average rain in September

September hourly sunshine

Rhinelander average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Rhinelander in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Rhinelander weather stats

Rhinelander weather statistics
Hottest month: July 25.5°C 77.9°F
Driest month: February 22mm 0.9ins
Sunniest month: July 10.8hrs
Coldest month: January -7.2°C 19°F
Wettest month: August 108mm 4.3ins
Map showing location of Rhinelander (45.63662, -89.41208) Rhinelander map pin © Google

Locations nearby

Top United States locations