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 subtly marks a decrease in the average high-temperature, transitioning from a pleasant 69.4°F (20.8°C) in August to a comfortable 63.5°F (17.5°C). Ontonagon records an average low-temperature of 52.7°F (11.5°C) throughout the month of September.Humidity
The average relative humidity in September in Ontonagon is 79%.Rainfall
In Ontonagon, in September, during 13.3 rainfall days, 1.85" (47mm) of precipitation is typically accumulated. Throughout the year, in Ontonagon, Michigan, there are 122.6 rainfall days, and 22.56" (573mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Ontonagon, Michigan.Daylight
The average length of the day in September in Ontonagon is 12h and 32min.On the first day of September in Ontonagon, Michigan, sunrise is at 7:17 am and sunset at 8:36 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 7:38 pm EDT.
Sunshine
The average sunshine in September is 7.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Adopt protective measures - Suggestions to resist sunburn are offered. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Ontonagon?
What is the average humidity in September in Ontonagon?
How much does it rain in Ontonagon in September?
When it does not snow in Ontonagon?
Does it snow in Ontonagon in September?
What is the average length of the day in September in Ontonagon?
When is the sunrise / sunset in September in Ontonagon?
How long on average sun shines in September in Ontonagon?
What is the UV index reading in September in Ontonagon?
Average temperature in September
Ontonagon, MI
- Average high temperature in September: 63.5°F
The warmest month (with the highest average high temperature) is August (69.4°F).
The month with the lowest average high temperature is January (22.3°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is August (58.1°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in September
Ontonagon, MI
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Ontonagon, MI
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is January (12.6mph).
The calmest month (with the lowest average wind speed) is June (7.6mph).
Average humidity in September
Ontonagon, MI
- Average humidity in September: 79%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is May (75%).
Average rainfall in September
Ontonagon, MI
- Average rainfall in September: 1.85"
The wettest months (with the highest rainfall) are April, June, August and October (2.28").
The driest month (with the least rainfall) is February (1.22").
Average rainfall days in September
Ontonagon, MI
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is October (14.6 days).
The month with the least rainy days is February (2.5 days).
Average snowfall in September
Ontonagon, MI
- Average snowfall in September: 0"
The month with the highest snowfall is December (6.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Ontonagon, MI
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (22.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Ontonagon, MI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 1h and 36min).
Average sunshine days in September
Ontonagon, MI
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is July (15.5 days).
The month with the least sunshine days is January (5.6 days).
Average UV index in September
Ontonagon, MI
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Ontonagon, MI
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 84).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in September
Ontonagon, MI
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, November and December (5mi).
Ontonagon, Michigan, USA
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