Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
As August makes way for September, Monroe's average high-temperature eases from a warm 78.3°F (25.7°C) to an agreeable 72.5°F (22.5°C). In Monroe, the average low-temperature during the month of September is a refreshing 57°F (13.9°C).Humidity
The average relative humidity in September in Monroe, Michigan, is 78%.Rainfall
The month with the least rainfall in Monroe is September, when the rain falls for 9.5 days and typically collects 0.39" (10mm) of precipitation.Snowfall
May through October are months without snowfall in Monroe.Ocean temperature
In Monroe, the average seawater temperature in September is 71.2°F (21.8°C).Note: Swimming is not an enjoyable activity for the majority when the water is at 71.2°F (21.8°C). The difficulty of controlling breathing increases as the temperature dips from 69.8°F (21°C) to 59°F (15°C).
Daylight
In Monroe, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 7:00 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:16 pm EDT.
Sunshine
The average sunshine in September in Monroe is 8.1h.UV index
The average daily maximum UV index in September in Monroe is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Guard yourself - An obligation to protect skin and eyes from harm exists. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Heads up! UV intensity is amplified by reflections from water and sand.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Monroe?
What is the average humidity in September in Monroe?
What is the driest month in Monroe?
How much does it rain in Monroe in September?
When it does not snow in Monroe?
What is the ocean temperature in September in Monroe?
What is the average length of the day in September in Monroe?
When is the sunrise / sunset in September in Monroe?
How long on average sun shines in September in Monroe?
How high is the UV index in September in Monroe?
Average temperature in September
Monroe, MI
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in September: 57°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in September
Monroe, MI
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Monroe, MI
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in September
Monroe, MI
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
Monroe, MI
- Average rainfall in September: 0.39"
The wettest months (with the highest rainfall) are May, June and August (1.06").
The driest month (with the least rainfall) is September (0.39").
Average rainfall days in September
Monroe, MI
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is May (12.2 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in September
Monroe, MI
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.02").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Monroe, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in September
Monroe, MI
- Average sea temperature in September: 71.2°F
The best month for swimming (with the highest average sea temperature) is August (76.4°F).
The coldest month (with the lowest average sea temperature) is February (32.6°F).
Average daylight in September /
Average sunshine in September
Monroe, MI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Monroe, MI
- Average sunshine days in September: 18 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is April (14.9 days).
Average UV index in September
Monroe, MI
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Monroe, MI
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Monroe, MI
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).