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 implies a soft temperature shift, with average high-temperatures reducing from August's moderately hot 77.5°F (25.3°C) to an agreeable 68.9°F (20.5°C). During September, the nighttime temperature averages to a chilly 48.9°F (9.4°C).Humidity
In September, the average relative humidity is 75%.Rainfall
In Grayling, during September, the rain falls for 10.9 days and regularly aggregates up to 1.42" (36mm) of precipitation. Throughout the year, in Grayling, Minnesota, there are 108 rainfall days, and 18.58" (472mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:51 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:53 pm CDT.
Sunshine
In Grayling, the average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow in Grayling?
Does it snow 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 Grayling have in September?
What is the UV index intensity in September?
Average temperature in September
Grayling, MN
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (17.1°F).
- Average low temperature in September: 48.9°F
The month with the highest average low temperature is July (58.3°F).
The coldest month (with the lowest average low temperature) is January (2.7°F).
Average pressure in September
Grayling, MN
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Grayling, MN
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in September
Grayling, MN
- Average humidity in September: 75%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (71%).
Average rainfall in September
Grayling, MN
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is June (2.87").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in September
Grayling, MN
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is June (15.6 days).
The months with the least rainy days are January and February (1.9 days).
Average snowfall in September
Grayling, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (6.18").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Grayling, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grayling, MN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 12min).
Average sunshine days in September
Grayling, MN
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (12.2 days).
Average UV index in September
Grayling, MN
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Grayling, MN
- Average cloud cover in September: 40
The month with the most cloud cover is January (Cloud cover 77).
The months with the least cloud cover are July and August (Cloud cover 35).
Average visibility in September
Grayling, MN
- Average visibility in September: 5mi
The months with the highest visibility are May, June, July and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Grayling, Minnesota, USA
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