September weather forecastGrand Junction, MI
September
Weather in September
September, the first month of the autumn in Grand Junction, is also an agreeable month, with an average temperature ranging between max 72.1°F (22.3°C) and min 56.3°F (13.5°C).Temperature
The transition into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from a moderately hot 77.5°F (25.3°C) in August to an agreeable 72.1°F (22.3°C). Grand Junction experiences an average low-temperature of 56.3°F (13.5°C) in the month of September.Humidity
In Grand Junction, the average relative humidity in September is 78%.Rainfall
In Grand Junction, in September, during 14.3 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. Throughout the year, there are 157.3 rainfall days, and 30.04" (763mm) of precipitation is accumulated.Snowfall
In Grand Junction, snow does not fall in June through September.Daylight
In Grand Junction, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 7:10 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 7:41 am and sunset at 7:26 pm EDT.
Sunshine
In September, the average sunshine is 8.4h.UV index
In Grand Junction, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Ensure safety - Imperative it is to shield skin and eyes from damage. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grand Junction, MI
- Average high temperature in September: 72.1°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (29.3°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in September
Grand Junction, MI
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January, March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Grand Junction, MI
- Average wind speed in September: 8.1mph
The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in September
Grand Junction, MI
- Average humidity in September: 78%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (76%).
Average rainfall in September
Grand Junction, MI
- Average rainfall in September: 2.28"
The wettest month (with the highest rainfall) is May (3.58").
The driest month (with the least rainfall) is February (1.65").
Average rainfall days in September
Grand Junction, MI
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in September
Grand Junction, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (5.08").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Grand Junction, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grand Junction, MI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in September
Grand Junction, MI
- Average sunshine days in September: 13.6 days
The month with the most sunshine days is March (14.7 days).
The month with the least sunshine days is January (8.8 days).
Average UV index in September
Grand Junction, MI
- Average UV index in September: 4
The months with the highest UV index are June and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Grand Junction, MI
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Grand Junction, MI
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
