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 arrival of September corresponds with a light shift in temperature, down from a warm 78.3°F (25.7°C) in August to an agreeable 72.1°F (22.3°C). Alto's average low-temperature is measured at a fresh 52.7°F (11.5°C) during September.Humidity
The average relative humidity in September in Alto, Michigan, is 78%.Rainfall
In Alto, during September, the rain falls for 11.5 days and regularly aggregates up to 1.57" (40mm) of precipitation. Throughout the year, in Alto, there are 146.3 rainfall days, and 23.07" (586mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Alto, Michigan.Daylight
In Alto, the average length of the day in September is 12h and 29min.On the first day of September in Alto, sunrise is at 7:06 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 7:24 pm EDT.
Sunshine
In Alto, the average sunshine in September is 8h.UV index
In Alto, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 4 during September translates into the following directions:
Exercise prevention - Warding off sunburn is urged. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Alto in September?
What is the average humidity in September in Alto?
How many days does it rain in September in Alto?
When it does not snow in Alto?
Does it snow in Alto in September?
What is the average length of the day in September in Alto?
When is the sunrise / sunset in September in Alto?
How long on average sun shines in September in Alto?
How high is the UV index in September in Alto?
Average temperature in September
Alto, MI
- Average high temperature in September: 72.1°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in September: 52.7°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 (17.8°F).
Average pressure in September
Alto, 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
Alto, MI
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is April (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in September
Alto, MI
- Average humidity in September: 78%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Alto, MI
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is October (2.76").
The driest month (with the least rainfall) is November (1.38").
Average rainfall days in September
Alto, MI
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (6 days).
Average snowfall in September
Alto, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.47").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Alto, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (19.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Alto, MI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in September
Alto, MI
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is September (16.3 days).
The month with the least sunshine days is February (8.1 days).
Average UV index in September
Alto, MI
- Average UV index in September: 4
The month with the highest UV index is August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Alto, MI
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in September
Alto, MI
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, October and November (6mi).
The month with the lowest visibility is January (4mi).
Alto, Michigan, USA
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