Grand Junction September Weather

Averages and records for weather in Grand Junction, Colorado in the month of September.
Typical Grand Junction September Weather
1991–2020
Average daily high 81.4 °F
Average daily low 52.8 °F
Average monthly precipitation 1.2 inches
Average monthly snow none
Daily chance of precipitation 21.6%
Daily chance of snow 0%
Grand Junction September Weather Records
1900–2024
Highest temperature 102 °F September 6, 2022
Lowest temperature 28 °F September 27, 1908
Highest daily low 72 °F September 5, 2013
Lowest daily high 46 °F September 18, 1965
Hottest average high temperature 86.7 °F 1979
Coldest average high temperature 70.8 °F 1961
Most daily precipitation 1.9 inches September 22, 1941
Most monthly precipitation 3.3 inches 1927
Most daily snow 3.1 inches September 18, 1965
Most monthly snow 3.1 inches 1965
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
September 1 86.8 58.4 100 47
September 2 86.5 58.1 99 41
September 3 86.1 57.8 99 43
September 4 85.7 57.5 100 42
September 5 85.3 57.1 100 42
September 6 85.0 56.7 102 47
September 7 84.6 56.4 99 44
September 8 84.2 55.9 98 39
September 9 83.8 55.5 96 40
September 10 83.4 55.0 95 42
September 11 83.1 54.6 94 41
September 12 82.7 54.1 96 36
September 13 82.3 53.7 95 39
September 14 81.9 53.3 97 36
September 15 81.6 52.9 94 32
September 16 81.2 52.6 94 35
September 17 80.7 52.2 93 32
September 18 80.2 51.8 93 31
September 19 79.7 51.4 94 30
September 20 79.2 50.9 91 29
September 21 78.7 50.5 90 33
September 22 78.2 50.0 90 34
September 23 77.7 49.5 90 36
September 24 77.2 49.0 89 35
September 25 76.8 48.6 89 32
September 26 76.4 48.2 89 34
September 27 76.0 47.8 90 28
September 28 75.6 47.3 89 33
September 29 75.2 46.9 89 32
September 30 74.8 46.5 89 32
Weather Station Details
Years Station Coordinates
1900–2024 Grand Junction Walker Field location