Grand Junction weather in September 2025

The temperatures in Grand Junction in September are quite cold with temperatures between 9°C and 27°C, warm clothes are a must.

The wather in Grand Junction in September can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.

Our weather forecast can give you a great sense of what weather to expect in Grand Junction in September 2025.

If you’re planning to visit Grand Junction in the near future, we highly recommend that you review the 14 day weather forecast for Grand Junction before you arrive.

Temperatures

27° / 9°

Rainy Days

Snowy Days

Dry Days

Rainfall

Sun Hours

10.9

Hrs

Explore the weather in Grand Junction in other months

Month	Temperatures	Rainy Days	Dry Days	Snowy Days	Rainfall	Weather	More details
January	3° / -9°	5	17	10	34 mm	Awful	Grand Junction in January
February	6° / -7°	5	15	9	40 mm	Awful	Grand Junction in February
March	12° / -2°	6	21	4	49 mm	Bad	Grand Junction in March
April	16° / 1°	3	25	2	37 mm	Ok	Grand Junction in April
May	22° / 5°	3	28	0	30 mm	Good	Grand Junction in May
June	30° / 10°	2	28	0	28 mm	Good	Grand Junction in June
July	32° / 13°	2	29	0	41 mm	Good	Grand Junction in July
August	31° / 12°	3	28	0	50 mm	Good	Grand Junction in August
September	27° / 9°	2	28	0	41 mm	Perfect	Grand Junction in September
October	18° / 2°	3	27	1	40 mm	Good	Grand Junction in October
November	11° / -3°	2	25	3	33 mm	Bad	Grand Junction in November
December	4° / -8°	4	19	8	45 mm	Awful	Grand Junction in December

Temperatures in Grand Junction in September

Rain in Grand Junction in September

What is the average temperature in Grand Junction in September?

The average temperature in Grand Junction in September is 9/27° C.

What is the chance of rain in Grand Junction in September?

On average, there are 2 rainy days in Grand Junction during September.

Weather wise, is September a good time to visit Grand Junction?

The weather in Grand Junction in September is perfect.

Can it snow in Grand Junction in September?

On average, there are 0 snowy days in Grand Junction in September.

More about the weather in Grand Junction