Michigan, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Frankfort, MI

A clear view of the Point Betsie Lighthouse in Frankfort, Michigan
A clear view of the Point Betsie Lighthouse in Frankfort, Michigan
September is the start of the autumn and the wettest month of the year at 4.3" (109.2mm). Highs often touch 70°F (21.1°C) with the average daily high of 68°F (20°C). Lows drop to 50°F (10°C), and protective rain gear is necessary.
M-22, the 116-mile road, is often rated as the #1 Best Scenic Autumn Drive in the United States with spectacular scenery and exquisite fall colors along its entire stretch. The crowds start to taper off as the number of sunny days reduces, and cold weather sets its feet in by late September.
  • Average high temperature in September: 68.1°F

The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (28.1°F).

  • Average low temperature in September: 52.7°F

The month with the highest average low temperature is August (59.6°F).
The coldest month (with the lowest average low temperature) is January (18.4°F).

  • Average rainfall in September: 4.3"

The wettest month (with the highest rainfall) is September (4.3").
Driest months (with the lowest rainfall) are February and March (1.9").

  • Average snowfall in September: 0"

The month with the highest snowfall is January (30.3").
Months with the lowest snowfall are June, July, August and September (0").

  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.5h).
The month with shortest days is December (Average daylight: 8.9h).