September weather in Fountain Hills, AZ
The average temperature in Fountain Hills in September is 85.4°F (73.7°F–97.1°F). Average precipitation: 0.81 inches.
September is a fall month in Fountain Hills, and is warmer than the annual average of 72.1°F. Daily temperatures swing about 23.4°F between overnight low and afternoon high. Expect about 3 days with precipitation. Daylight averages about 12h 12m. For travel, September is hot.
Avg High
97.1°F
Avg Low
73.7°F
Precipitation
0.81 in
Daylight
12h 12m
September records in Fountain Hills
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 115.0°F (1995) | 61.0°F (1992) | 0.78 in (2021) |
| September 2 | 114.1°F (1982) | 64.9°F (1992) | 0.91 in (1984) |
| September 3 | 115.0°F (1982) | 64.9°F (1999) | 0.52 in (1994) |
| September 4 | 115.0°F (1995) | 61.0°F (1992) | 0.59 in (1991) |
| September 5 | 114.1°F (1995) | 62.1°F (1985) | 0.50 in (1980) |
| September 6 | 113.0°F (1982) | 63.0°F (1985) | 1.00 in (1991) |
| September 7 | 111.9°F (1982) | 62.1°F (1985) | 0.37 in (1998) |
| September 8 | 111.9°F (1994) | 64.0°F (1985) | 0.50 in (2012) |
| September 9 | 109.9°F (1993) | 61.0°F (1989) | 1.05 in (2014) |
| September 10 | 111.9°F (1993) | 62.1°F (1989) | 0.60 in (2002) |
| September 11 | 111.9°F (1990) | 62.1°F (1986) | 0.59 in (1996) |
| September 12 | 114.1°F (1990) | 57.0°F (1985) | 0.64 in (1997) |
| September 13 | 109.0°F (1995) | 60.1°F (1991) | 0.55 in (1996) |
| September 14 | 111.9°F (1995) | 57.9°F (1986) | 0.55 in (1994) |
| September 15 | 109.9°F (2000) | 59.0°F (1996) | 0.60 in (1999) |
| September 16 | 109.0°F (2000) | 61.0°F (1986) | 0.21 in (1990) |
| September 17 | 108.0°F (1989) | 59.0°F (1993) | 0.05 in (2014) |
| September 18 | 107.1°F (2000) | 57.9°F (1993) | 0.90 in (1985) |
| September 19 | 108.0°F (1994) | 57.0°F (1985) | 0.87 in (2004) |
| September 20 | 107.1°F (2010) | 57.0°F (1985) | 0.86 in (2004) |
| September 21 | 106.0°F (1984) | 55.9°F (1989) | 0.22 in (1990) |
| September 22 | 107.1°F (1982) | 55.9°F (1988) | 0.10 in (2022) |
| September 23 | 111.9°F (1989) | 57.9°F (1988) | 0.50 in (2019) |
| September 24 | 109.9°F (1982) | 51.1°F (1986) | 3.02 in (2019) |
| September 25 | 107.1°F (1982) | 55.0°F (1986) | 0.07 in (2003) |
| September 26 | 109.0°F (1989) | 57.0°F (2017) | 1.25 in (1984) |
| September 27 | 108.0°F (1989) | 51.1°F (1986) | 1.79 in (2025) |
| September 28 | 109.0°F (2024) | 55.0°F (1982) | 1.08 in (1995) |
| September 29 | 111.0°F (2024) | 55.9°F (1982) | 0.14 in (1985) |
| September 30 | 108.0°F (2024) | 57.0°F (1982) | 1.95 in (1983) |