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
The beginning of September brings a slight decrease in the average high-temperature, transitioning from a warm 76.6°F (24.8°C) in August to an agreeable 70.9°F (21.6°C). Bay City's nighttime temperature during September is consistently averaged at a cool 53.4°F (11.9°C).Humidity
The average relative humidity in September is 79%.Rainfall
In Bay City, in September, during 8.2 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. Throughout the year, there are 111.7 rainfall days, and 11.65" (296mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September in Bay City is 12h and 29min.On the first day of the month, sunrise is at 7:00 am and sunset at 8:10 pm. On the last day of September, sunrise is at 7:32 am and sunset at 7:17 pm EDT.
Sunshine
In Bay City, the average sunshine in September is 8h.UV index
The average daily maximum UV index in September in Bay City is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 3 suggests this advice:
Undertake precautions - Guarding against sun damage is counselled. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Frequently asked questions
What is the temperature in September in Bay City?
What is the average humidity in September in Bay City?
How many days does it rain in September in Bay City?
When it does not snow in Bay City?
Does it snow in Bay City in September?
How many hours of daylight does Bay City have in September?
When is the sunrise / sunset in September in Bay City?
How many hours of sunshine does Bay City have in September?
What is the UV index intensity in September in Bay City?
Average temperature in September
Bay City, MI
- Average high temperature in September: 70.9°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in September
Bay City, 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 (29.92"Hg).
Average wind speed in September
Bay City, MI
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in September
Bay City, MI
- Average humidity in September: 79%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Bay City, MI
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is May (1.65").
The driest month (with the least rainfall) is November (0.55").
Average rainfall days in September
Bay City, MI
- Average rainfall days in September: 8.2 days
The month with the highest number of rainy days is May (14 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Bay City, MI
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Bay City, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (11.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Bay City, 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 0min
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 48min).
Average sunshine days in September
Bay City, MI
- Average sunshine days in September: 19.2 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is April (13.7 days).
Average UV index in September
Bay City, MI
- Average UV index in September: 3
The months with the highest UV index are May, 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
Bay City, MI
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in September
Bay City, 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).
Bay City, Michigan, USA
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