September weather forecast
Grand Junction, MI

Share

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.

Frequently asked questions

What is the average September temperature?

The average high-temperature, in September, in Grand Junction, is 72.1°F (22.3°C), while the average low-temperature is 56.3°F (13.5°C).

What is the average humidity in September?

The average relative humidity in September is 78%.

How much does it rain in September?

In Grand Junction, in September, during 14.3 rainfall days, 2.28" (58mm) of precipitation is typically accumulated.

When it does not snow in Grand Junction?

June through September are months without snowfall.

Does it snow in September?

In Grand Junction, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Grand Junction have in September?

In Grand Junction, the average day length in September is 12h and 28min.

When are sunrise and sunset in September?

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.

How long on average sun shines in September?

The average sunshine duration in September is 8.4h.

What is the UV index intensity in September?

In Grand Junction, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Grand Junction, MI

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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 / Average sunshine in September - Grand Junction, MI
  • Average daylight in September: 12h and 3min

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 2min

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 - 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 - 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 - 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 - 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).

Grand Junction, Michigan, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location