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 sea temperature 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 transition into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from a moderately hot 76.6°F (24.8°C) in August to an agreeable 70.7°F (21.5°C). An average low-temperature of 56.8°F (13.8°C) is recorded during the nights in September.Humidity
In September, the average relative humidity is 78%.Rainfall
In September, the rain falls for 13.3 days. Throughout September, 1.81" (46mm) of precipitation is accumulated. In Algonac, during the entire year, the rain falls for 155.6 days and collects up to 25.59" (650mm) of precipitation.Snowfall
In Algonac, snow does not fall in June through September.Ocean temperature
In September, the average ocean temperature is 69.4°F (20.8°C).Note: In water of 69.4°F (20.8°C), the majority of people do not enjoy swimming. Breathing becomes increasingly hard to manage as the temperature drops from 69.8°F (21°C) to 59°F (15°C).
Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:55 am and sunset at 8:03 pm. On the last day of September, sunrise is at 7:27 am and sunset at 7:12 pm EDT.
Sunshine
In Algonac, the average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In September, a regular UV index of 4 translates into these guidelines:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
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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 Algonac in September?
When it does not snow?
Does it snow in September?
What is the ocean temperature in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Algonac have in September?
What is the UV index reading in September?
Average temperature in September
Algonac, MI
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in September: 56.8°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure in September
Algonac, MI
- Average pressure in September: 30.04"Hg
The months with the highest atmospheric pressure are March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Algonac, MI
- Average wind speed in September: 8.1mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).
Average humidity in September
Algonac, MI
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are April, May and October (76%).
Average rainfall in September
Algonac, MI
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is May (2.99").
The driest months (with the least rainfall) are January and February (1.42").
Average rainfall days in September
Algonac, MI
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in September
Algonac, MI
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.25").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Algonac, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in September
Algonac, MI
- Average sea temperature in September: 69.4°F
The best month for swimming (with the highest average sea temperature) is August (73.9°F).
The coldest month (with the lowest average sea temperature) is February (32.5°F).
Average daylight in September /
Average sunshine in September
Algonac, 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Algonac, MI
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is September (14.6 days).
The month with the least sunshine days is January (10.2 days).
Average UV index in September
Algonac, MI
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Algonac, MI
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Algonac, MI
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Algonac, Michigan, USA
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