Twin Falls September Weather

Averages and records for weather in Twin Falls, Idaho in the month of September.
Typical Twin Falls September Weather
1991–2020
Average daily high 77.1 °F
Average daily low 47.5 °F
Average monthly precipitation 0.5 inches
Twin Falls September Weather Records
1925–2023
Highest temperature 102 °F September 6, 2022
Lowest temperature 14 °F September 26, 1926
Highest daily low 70 °F September 15, 2002
Lowest daily high 42 °F September 17, 1965
Hottest average temperature 5.3 °F
above average
2009
Coldest average temperature -8.9 °F
below average
1985
Most daily precipitation 1.4 inches September 19, 1948
Most monthly precipitation 2.9 inches 1940
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 82.5 51.9 99 35
September 2 82.1 51.6 97 37
September 3 81.7 51.4 99 35
September 4 81.3 51.1 99 33
September 5 80.8 50.7 98 36
September 6 80.4 50.4 102 34
September 7 80.0 50.1 100 31
September 8 79.6 49.7 95 32
September 9 79.2 49.4 93 30
September 10 78.8 49.0 96 32
September 11 78.5 48.7 96 34
September 12 78.0 48.4 94 32
September 13 77.7 48.1 92 29
September 14 77.4 47.7 99 27
September 15 77.2 47.5 95 27
September 16 76.9 47.3 92 29
September 17 76.6 47.0 95 29
September 18 76.1 46.8 92 23
September 19 75.6 46.4 93 24
September 20 75.1 46.0 92 25
September 21 74.6 45.6 90 25
September 22 74.1 45.2 89 25
September 23 73.8 44.9 92 27
September 24 73.3 44.6 93 26
September 25 72.9 44.4 97 25
September 26 72.3 44.0 88 14
September 27 71.8 43.6 90 25
September 28 71.3 43.2 92 24
September 29 70.9 42.9 88 27
September 30 70.4 42.5 91 25
Weather Station Details
Years Station Coordinates
1998–2023 Magic Valley Regional Airport location
1977–1997 Twin Falls 6 E location
1925–1976 Twin Falls 3 SE location