September weather in Mackay, ID
The average temperature in Mackay in September is 56.3°F (40.4°F–72.1°F). Average precipitation: 0.77 inches.
September is a fall month in Mackay, and is warmer than the annual average of 42.2°F. Daily temperatures swing about 31.7°F between overnight low and afternoon high. Expect about 5 days with precipitation. Daylight averages about 12h 17m. For travel, September is a comfortable month to visit.
Avg High
72.1°F
Avg Low
40.4°F
Precipitation
0.77 in
Daylight
12h 17m
September records in Mackay
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 91.0°F (1995) | 28.9°F (1977) | 0.39 in (1909) |
| September 2 | 91.9°F (1988) | 30.0°F (1977) | 0.77 in (1985) |
| September 3 | 91.9°F (1950) | 30.0°F (1964) | 0.25 in (1912) |
| September 4 | 95.0°F (2022) | 26.1°F (1980) | 0.40 in (1940) |
| September 5 | 93.9°F (2022) | 28.0°F (1984) | 0.65 in (1909) |
| September 6 | 93.0°F (2022) | 23.0°F (1917) | 0.72 in (1920) |
| September 7 | 95.0°F (1923) | 19.9°F (1984) | 0.79 in (2025) |
| September 8 | 90.0°F (1923) | 21.0°F (1984) | 0.59 in (1950) |
| September 9 | 87.1°F (1923) | 19.9°F (1984) | 0.71 in (2010) |
| September 10 | 86.0°F (1911) | 19.0°F (1984) | 0.93 in (1927) |
| September 11 | 88.0°F (1990) | 28.0°F (1921) | 1.20 in (1976) |
| September 12 | 90.0°F (1990) | 25.0°F (1910) | 0.95 in (1958) |
| September 13 | 93.0°F (1943) | 23.0°F (1921) | 1.45 in (1980) |
| September 14 | 96.1°F (1943) | 19.9°F (1992) | 1.20 in (1959) |
| September 15 | 88.0°F (1981) | 19.0°F (1970) | 0.53 in (1986) |
| September 16 | 89.1°F (1981) | 25.0°F (1921) | 0.62 in (2015) |
| September 17 | 87.1°F (1981) | 26.1°F (1997) | 1.17 in (2024) |
| September 18 | 86.0°F (1937) | 24.1°F (2003) | 0.68 in (1919) |
| September 19 | 98.1°F (1939) | 25.0°F (1942) | 0.71 in (1982) |
| September 20 | 97.0°F (1939) | 12.0°F (1983) | 0.55 in (2006) |
| September 21 | 97.0°F (1939) | 24.1°F (1995) | 0.60 in (2016) |
| September 22 | 84.9°F (1966) | 19.9°F (1980) | 0.88 in (2016) |
| September 23 | 87.1°F (1987) | 21.0°F (1912) | 0.54 in (1934) |
| September 24 | 84.9°F (1987) | 19.9°F (1912) | 0.22 in (1973) |
| September 25 | 84.0°F (1987) | 12.0°F (1984) | 0.56 in (1948) |
| September 26 | 84.0°F (2009) | 24.1°F (1933) | 0.56 in (1915) |
| September 27 | 82.9°F (1921) | 15.1°F (1926) | 0.75 in (2014) |
| September 28 | 84.9°F (2010) | 17.1°F (1971) | 0.90 in (2014) |
| September 29 | 84.0°F (2024) | 24.1°F (1922) | 0.67 in (2019) |
| September 30 | 82.0°F (1963) | 10.0°F (1985) | 1.00 in (1930) |