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
September signifies a gentle decline in Clarkston's average high-temperature, easing from a moderately hot 78.1°F (25.6°C) in August to an agreeable 71.6°F (22°C). Throughout the month of September, Clarkston sees a steady low-temperature average of 54.1°F (12.3°C).Humidity
In September, the average relative humidity is 78%.Rainfall
In Clarkston, in September, it is raining for 13.2 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, there are 146.7 rainfall days, and 21.22" (539mm) of precipitation is accumulated.Snowfall
In Clarkston, snow does not fall in June through September.Daylight
In Clarkston, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:59 am and sunset at 8:07 pm. On the last day of September, sunrise is at 7:30 am and sunset at 7:16 pm EDT.
Sunshine
In Clarkston, the average sunshine in September is 8h.UV index
In Clarkston, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum UV index of 3 in September translates into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How much does it rain in Clarkston in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Clarkston have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Clarkston, MI
- Average high temperature in September: 71.6°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 (27.5°F).
- Average low temperature in September: 54.1°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in September
Clarkston, MI
- Average pressure in September: 30.03"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
Clarkston, MI
- Average wind speed in September: 7.2mph
The windiest months (with the highest average wind speed) are January and February (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in September
Clarkston, MI
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Clarkston, MI
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is December (1.02").
Average rainfall days in September
Clarkston, MI
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (5.5 days).
Average snowfall in September
Clarkston, MI
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.08").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Clarkston, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Clarkston, 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 30min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in September
Clarkston, MI
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is November (14.9 days).
The month with the least sunshine days is February (9.3 days).
Average UV index in September
Clarkston, MI
- Average UV index in September: 3
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Clarkston, MI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Clarkston, MI
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Clarkston, Michigan, USA
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