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 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
Weather in September
Temperature
September brings a slight decrease in the average high-temperature, shifting from a pleasant 73°F (22.8°C) in August to a refreshing 67.5°F (19.7°C). September brings Port Sanilac a consistent average low-temperature of 58.3°F (14.6°C).Humidity
September through November, with an average relative humidity of 78%, are the least humid months.Rainfall
In Port Sanilac, in September, during 12.6 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. Throughout the year, there are 131.4 rainfall days, and 16.69" (424mm) of precipitation is accumulated.Snowfall
In Port Sanilac, snow does not fall in May through September.Daylight
In September, the average length of the day in Port Sanilac is 12h and 29min.On the first day of the month, sunrise is at 6:54 am and sunset at 8:04 pm. On the last day of September, sunrise is at 7:27 am and sunset at 7:12 pm EDT.
Sunshine
In Port Sanilac, the average sunshine in September is 8.2h.UV index
In Port Sanilac, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: A maximum UV index of 4 in September translates into the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Port Sanilac in September?
What are the least humid months in Port Sanilac?
What is the average humidity in September in Port Sanilac?
How many days does it rain in September in Port Sanilac?
When it does not snow in Port Sanilac?
Does it snow in Port Sanilac in September?
What is the average length of the day in September in Port Sanilac?
When is the sunrise / sunset in September in Port Sanilac?
How many hours of sunshine does Port Sanilac have in September?
What is the UV index reading in September in Port Sanilac?
Average temperature in September
Port Sanilac, MI
- Average high temperature in September: 67.5°F
The warmest month (with the highest average high temperature) is August (73°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in September: 58.3°F
The month with the highest average low temperature is August (63.7°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in September
Port Sanilac, MI
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Port Sanilac, MI
- Average wind speed in September: 10.3mph
The windiest month (with the highest average wind speed) is January (14.4mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).
Average humidity in September
Port Sanilac, MI
- Average humidity in September: 78%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are September, October and November (78%).
Average rainfall in September
Port Sanilac, MI
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is February (0.67").
Average rainfall days in September
Port Sanilac, MI
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in September
Port Sanilac, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.73").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Port Sanilac, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Port Sanilac, MI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in September
Port Sanilac, MI
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is June (15.8 days).
The month with the least sunshine days is February (10.7 days).
Average UV index in September
Port Sanilac, MI
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in September
Port Sanilac, MI
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Port Sanilac, MI
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Port Sanilac, Michigan, USA
Weather forecast for your location
2. Allow the app to use your location