September weather forecast and climate
Monroe, MI

What is the temperature in September in Monroe?

The average high-temperature, in September, in Monroe, is 75°F (23.9°C), while the average low-temperature is 55°F (12.8°C).

How much does it rain in Monroe in September?

During September, Monroe regularly aggregates up to 3" (76.2mm) of precipitation.

What is the sea temperature in September in Monroe?

The average seawater temperature, in September, in Monroe, is 71.2°F (21.8°C). For swimming, a surface water temperature of 71.2°F (21.8°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).
Average temperature in September - Monroe, MI
  • Average high temperature in September: 23.9°C

The warmest month (with the highest average high temperature) is July (28.9°C).
The month with the lowest average high temperature is January (-0.6°C).

  • Average low temperature in September: 12.8°C

The month with the highest average low temperature is July (17.8°C).
The coldest month (with the lowest average low temperature) is January (-8.9°C).

Average rainfall in September - Monroe, MI
  • Average rainfall in September: 76.2mm

The wettest month (with the highest rainfall) is June (88.9mm).
The driest month (with the lowest rainfall) is January (40.6mm).

Average snowfall in September - Monroe, MI
  • Average snowfall in September: 0mm

The month with the highest snowfall is January (188mm).
Months with the lowest snowfall are May, June, July, August, September and October (0mm).

Average sea temperature in September - Monroe, MI
  • Average sea temperature in September: 21.8°C

The best month for swimming (with the highest average sea temperature) is August (24.7°C).
The coldest month (with the lowest average sea temperature) is February (0.3°C).

Average daylight in September - Monroe, MI
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with shortest days is December (Average daylight: 9.2h).

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