Frankfort
Michigan, USA
Long-term weather forecast
Long-term weather forecast
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September weather forecast and Climate
Frankfort, MI

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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.
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  • The average high temperature in September: 20.1°C

The warmest month (with the highest average high temperature) is July (25°C).
The month with the lowest average high temperature is January (-2.2°C).

  • The average low temperature in September: 11.5°C

The month with the highest average low temperature is August (15.3°C).
The coldest month (with the lowest average low temperature) is January (-7.6°C).

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  • The average rainfall in September: 108mm

The wettest month (with the highest rainfall) is September (108mm).
The driest month (with the lowest rainfall) is February (47.2mm).

  • The average snowfall in September: 0mm

The month with the highest snowfall is January (769.6mm).
Months with the lowest snowfall are June, July, August and September (0mm).

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