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
Grand Rapids's September weather comes with a decrease in average high-temperatures, moving from a moderately hot 77.2°F (25.1°C) in August to a refreshing 67.3°F (19.6°C). In Grand Rapids, the nighttime temperature averages to a chilly 47.5°F (8.6°C) during September.Humidity
In September, the average relative humidity is 76%.Rainfall
In Grand Rapids, in September, it is raining for 11.6 days, with typically 1.42" (36mm) of accumulated precipitation. In Grand Rapids, during the entire year, the rain falls for 113.8 days and collects up to 18.94" (481mm) of precipitation.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 September, sunrise is at 6:34 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:54 pm CDT.
Sunshine
The average sunshine in September is 8h.UV index
In Grand Rapids, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Make use of precautions - It is urged to ward off sun damage. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Frequently asked questions
What are the temperatures in Grand Rapids in September?
What is the average humidity in September in Grand Rapids?
How many days does it rain in September in Grand Rapids?
When it does not snow in Grand Rapids?
Does it snow in Grand Rapids in September?
How many hours of daylight does Grand Rapids have in September?
When is the sunrise / sunset in September in Grand Rapids?
How long on average sun shines in September in Grand Rapids?
How high is the UV index in September in Grand Rapids?
Average temperature in September
Grand Rapids, MN
- Average high temperature in September: 67.3°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (15.8°F).
- Average low temperature in September: 47.5°F
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (1.4°F).
Average pressure in September
Grand Rapids, 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
Grand Rapids, MN
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Grand Rapids, MN
- Average humidity in September: 76%
The months with the highest relative humidity are January and February (93%).
The month with the lowest relative humidity is May (70%).
Average rainfall in September
Grand Rapids, MN
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is June (2.91").
The driest months (with the least rainfall) are January and February (0.75").
Average rainfall days in September
Grand Rapids, MN
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is June (16.4 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in September
Grand Rapids, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (7.2").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Grand Rapids, MN
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is January (21.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Grand Rapids, MN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 1h and 54min).
Average sunshine days in September
Grand Rapids, MN
- Average sunshine days in September: 16.5 days
The months with the most sunshine days are August and September (16.5 days).
The month with the least sunshine days is February (10.1 days).
Average UV index in September
Grand Rapids, 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
Grand Rapids, MN
- Average cloud cover in September: 43
The month with the most cloud cover is January (Cloud cover 81).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in September
Grand Rapids, MN
- Average visibility in September: 5mi
The months with the highest visibility are May and June (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Grand Rapids, Minnesota, USA
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