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
As August shifts into September, a minor alteration in temperatures is observed, with average highs reducing from a moderately hot 77.4°F (25.2°C) to an agreeable 70.7°F (21.5°C). In the month of September, the nighttime temperature in Bay City dips to a steady average of 51.4°F (10.8°C).Humidity
In Bay City, the average relative humidity in September is 79%.Rainfall
In September, the rain falls for 10.9 days. Throughout September, 1.18" (30mm) of precipitation is accumulated. In Bay City, during the entire year, the rain falls for 108.7 days and collects up to 14.17" (360mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Bay City, the average length of the day in September is 12h and 30min.On the first day of September in Bay City, sunrise is at 6:33 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:51 pm CDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In Bay City, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 4 during September translates into the following guidance:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September in Bay City?
When is the sunrise / sunset in September?
How many hours of sunshine does Bay City have in September?
How high is the UV index in September?
Average temperature in September
Bay City, WI
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (20.5°F).
- Average low temperature in September: 51.4°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (6.3°F).
Average pressure in September
Bay City, WI
- Average pressure in September: 30.01"Hg
The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Bay City, WI
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is April (9.5mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in September
Bay City, WI
- Average humidity in September: 79%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall in September
Bay City, WI
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is June (2.68").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in September
Bay City, WI
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is June (14.9 days).
The month with the least rainy days is February (2.2 days).
Average snowfall in September
Bay City, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.15").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Bay City, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14 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, WI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Bay City, WI
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is December (19.1 days).
The month with the least sunshine days is June (11.9 days).
Average UV index in September
Bay City, WI
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Bay City, WI
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 68).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in September
Bay City, WI
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Bay City, Wisconsin, USA
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