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 brings a slight decrease in temperature, down from a warm 73.6°F (23.1°C) in August to a refreshing 67.5°F (19.7°C). September witnesses an average low-temperature hovering around a cool 54°F (12.2°C).Humidity
In September, the average relative humidity in Grawn, Michigan, is 78%.Rainfall
In Grawn, in September, during 8.9 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. Throughout the year, in Grawn, there are 94.8 rainfall days, and 8.35" (212mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Grawn is 12h and 31min.On the first day of the month, sunrise is at 7:06 am and sunset at 8:18 pm. On the last day of September, in Grawn, Michigan, sunrise is at 7:40 am and sunset at 7:24 pm EDT.
Sunshine
In September, the average sunshine in Grawn is 8.1h.UV index
In Grawn, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 3 in September translates into these instructions:
Adopt protective measures - Suggestions to resist sunburn are offered. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Frequently asked questions
What are September temperatures in Grawn?
What is the average humidity in September in Grawn?
How much does it rain in Grawn in September?
When it does not snow in Grawn?
Does it snow in Grawn in September?
How many hours of daylight does Grawn have in September?
When is the sunrise / sunset in September in Grawn?
How many hours of sunshine does Grawn have in September?
How high is the UV index in September in Grawn?
Average temperature in September
Grawn, MI
- Average high temperature in September: 67.5°F
The warmest month (with the highest average high temperature) is August (73.6°F).
The month with the lowest average high temperature is January (25.7°F).
- Average low temperature in September: 54°F
The month with the highest average low temperature is August (59.5°F).
The coldest months (with the lowest average low temperature) are January and February (18.1°F).
Average pressure in September
Grawn, 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
Grawn, MI
- Average wind speed in September: 8.9mph
The windiest months (with the highest average wind speed) are January and December (12mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity in September
Grawn, 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
Grawn, MI
- Average rainfall in September: 0.51"
The wettest month (with the highest rainfall) is May (0.98").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in September
Grawn, MI
- Average rainfall days in September: 8.9 days
The month with the highest number of rainy days is May (11.5 days).
The month with the least rainy days is February (2.1 days).
Average snowfall in September
Grawn, MI
- Average snowfall in September: 0"
The months with the highest snowfall are January and November (2.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Grawn, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grawn, 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 18min).
The month with the least sunshine is January (Average sunshine: 1h and 48min).
Average sunshine days in September
Grawn, MI
- Average sunshine days in September: 18.2 days
The month with the most sunshine days is March (18.8 days).
The month with the least sunshine days is February (14.6 days).
Average UV index in September
Grawn, 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, March, November and December (UV index 1).
Average cloud cover in September
Grawn, MI
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 82).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Grawn, MI
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Grawn, Michigan, USA
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