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 move into September indicates a slight reduction in the average high-temperature, down from August's pleasant 72.1°F (22.3°C) to a comfortable 66.4°F (19.1°C). Throughout the month of September, the average temperature dips to a cool 54.5°F (12.5°C) at night.Humidity
In Alden, the average relative humidity in September is 78%.Rainfall
In Alden, during September, the rain falls for 12.6 days and regularly aggregates up to 1.81" (46mm) of precipitation. Throughout the year, there are 136.2 rainfall days, and 24.65" (626mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Alden is 12h and 31min.On the first day of September in Alden, sunrise is at 7:04 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 7:22 pm EDT.
Sunshine
The average sunshine in September is 8.1h.UV index
The average daily maximum UV index in September in Alden is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 3 during September morphs into the following directions:
Be vigilant - A duty to shield skin and eyes from injury exists. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Alden?
What is the average humidity in September in Alden?
How many days does it rain in September in Alden?
When it does not snow in Alden?
Does it snow in Alden in September?
What is the average length of the day in September in Alden?
What time are sunrise and sunset in September in Alden?
How long on average sun shines in September in Alden?
What is the UV index intensity in September in Alden?
Average temperature in September
Alden, MI
- Average high temperature in September: 66.4°F
The warmest month (with the highest average high temperature) is August (72.1°F).
The month with the lowest average high temperature is January (25.7°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is August (60.4°F).
The coldest months (with the lowest average low temperature) are January and February (18.9°F).
Average pressure in September
Alden, MI
- Average pressure in September: 30.02"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
Alden, MI
- Average wind speed in September: 9.4mph
The windiest months (with the highest average wind speed) are January, November and December (12.6mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in September
Alden, MI
- Average humidity in September: 78%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and May (77%).
Average rainfall in September
Alden, MI
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is October (2.91").
The driest month (with the least rainfall) is February (1.54").
Average rainfall days in September
Alden, MI
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is October (17.9 days).
The month with the least rainy days is February (3.9 days).
Average snowfall in September
Alden, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (6.57").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Alden, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (21.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Alden, MI
- 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 1h and 42min).
Average sunshine days in September
Alden, MI
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is May (14.7 days).
The month with the least sunshine days is January (4.7 days).
Average UV index in September
Alden, MI
- Average UV index in September: 3
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, November and December (UV index 1).
Average cloud cover in September
Alden, MI
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 83).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in September
Alden, MI
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Alden, Michigan, USA
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