Grand Junction Weather in September

September in Grand Junction sees daytime temperatures around 28°C (82°F) and lows of 12°C (54°F) at night. As the wettest month of the year, keep in mind that rainfall is at its highest.

Rainfall in Grand Junction in September

Since this month has the highest rainfall, keep an umbrella with you to handle sudden showers. Historically, approximately 7 days this month are expected to have rain, averaging 32 mm (1.3 in). When rain does fall, showers tend to be light and brief. Most days will be dry.

Temperature in Grand Junction in September

September is one of the better months to visit Grand Junction. Expect 28°C (82°F) during the day and 12°C (54°F) at night. This kind of day-to-night contrast is typical for this time of year. With lows of 12°C (54°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Grand Junction in September

The days are predominantly sunny, with an estimated total of around 293 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Wind Speed in Grand Junction in September

Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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For a detailed overview over the year and the best time to visit the United States of America, check out our Grand Junction's climate page.

Grand Junction Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 28°C (82°F)  

Chance of Rain 23%  

Precipitation 32 mm (1.3 in)  

Rainy days 7 days  

Humidity 39%  

Windspeed 4 m/s (8 knots)  

Sunshine 293 hours  

Percentage Sunshine  

What to Wear in Grand Junction in September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Pack a light rain jacket or compact umbrella for occasional showers. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Grand Junction in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

10/10

Cycling

8/10

Walking

8/10

Barbeque

10/10

Camping

10/10

Outdoor sports

8/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Grand Junction's climate page.

More climate data for Grand Junction

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Grand Junction climate overview or explore weather in the United States of America.