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
With the onset of September, the average high-temperature subtly recedes from August's moderately hot 77.4°F (25.2°C) to an agreeable 69.4°F (20.8°C). Grasston cools down to an average low-temperature of 50.5°F (10.3°C) throughout the month of September.Humidity
In Grasston, the average relative humidity in September is 76%.Rainfall
In September, in Grasston, Minnesota, the rain falls for 10.9 days. Throughout September, 1.69" (43mm) of precipitation is accumulated. In Grasston, during the entire year, the rain falls for 116.6 days and collects up to 20.71" (526mm) of precipitation.Snowfall
June through September are months without snowfall in Grasston.Daylight
The average length of the day in September in Grasston is 12h and 31min.On the first day of September, sunrise is at 6:34 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 6:54 pm CDT.
Sunshine
In September, the average sunshine in Grasston is 8.7h.UV index
In Grasston, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 4 in September translates into this advice:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Frequently asked questions
What is the temperature in September in Grasston?
What is the average humidity in September in Grasston?
How much does it rain in Grasston in September?
When it does not snow in Grasston?
Does it snow in Grasston in September?
How many hours of daylight does Grasston have in September?
When are sunrise and sunset in September in Grasston?
How long on average sun shines in September in Grasston?
What is the UV index reading in September in Grasston?
Average temperature in September
Grasston, MN
- Average high temperature in September: 69.4°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (18.1°F).
- Average low temperature in September: 50.5°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (5.2°F).
Average pressure in September
Grasston, MN
- Average pressure in September: 29.99"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
Grasston, MN
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in September
Grasston, MN
- Average humidity in September: 76%
The month with the highest relative humidity is January (91%).
The months with the lowest relative humidity are April and May (72%).
Average rainfall in September
Grasston, MN
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is June (3.39").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
Grasston, MN
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is January (1.8 days).
Average snowfall in September
Grasston, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (5.55").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Grasston, MN
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grasston, MN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in September
Grasston, MN
- Average sunshine days in September: 17.4 days
The months with the most sunshine days are January and November (18.1 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
Grasston, 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
Grasston, MN
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Grasston, MN
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Grasston, Minnesota, USA
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