September weather in Diamondville, WY
The average temperature in Diamondville in September is 52.0°F (32.4°F–71.6°F). Average precipitation: 0.97 inches. Average snowfall is 0.4 inches.
September is a fall month in Diamondville, and is warmer than the annual average of 38.4°F. Daily temperatures swing about 39.2°F between overnight low and afternoon high. Expect about 4 days with precipitation. Daylight averages about 12h 16m. For travel, September is cool.
Avg High
71.6°F
Avg Low
32.4°F
Precipitation
0.97 in
Snow
0.4 in
September records in Diamondville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| September 1 | 90.0°F (2019) | 25.0°F (1981) | 1.30 in (1938) |
| September 2 | 91.9°F (2022) | 21.0°F (1952) | 1.00 in (1966) |
| September 3 | 90.0°F (2017) | 16.0°F (1975) | 1.50 in (1983) |
| September 4 | 91.0°F (2022) | 21.0°F (1971) | 0.83 in (1983) |
| September 5 | 93.0°F (2022) | 23.0°F (2010) | 0.62 in (1970) |
| September 6 | 91.9°F (2022) | 24.1°F (2010) | 0.98 in (1970) |
| September 7 | 93.0°F (2022) | 23.0°F (2010) | 0.41 in (2025) |
| September 8 | 93.9°F (2022) | 18.0°F (1976) | 0.49 in (2019) |
| September 9 | 87.1°F (2021) | 21.0°F (1962) | 0.38 in (1989) |
| September 10 | 90.0°F (2021) | 23.0°F (2010) | 0.51 in (2019) |
| September 11 | 84.0°F (2021) | 23.0°F (2010) | 0.80 in (1973) |
| September 12 | 84.9°F (2015) | 19.9°F (1951) | 0.65 in (1984) |
| September 13 | 84.0°F (1990) | 21.0°F (1949) | 0.47 in (2021) |
| September 14 | 82.9°F (1948) | 19.9°F (1975) | 0.95 in (1982) |
| September 15 | 82.0°F (1990) | 18.0°F (1975) | 0.56 in (2015) |
| September 16 | 84.0°F (1990) | 18.0°F (1936) | 0.61 in (1963) |
| September 17 | 82.0°F (1937) | 16.0°F (1965) | 0.70 in (1978) |
| September 18 | 82.9°F (1981) | 9.0°F (1965) | 0.62 in (2001) |
| September 19 | 82.9°F (1952) | 16.0°F (1978) | 0.55 in (1990) |
| September 20 | 82.0°F (2016) | 10.0°F (1983) | 0.64 in (1959) |
| September 21 | 80.1°F (1967) | 5.0°F (1983) | 0.46 in (1989) |
| September 22 | 84.0°F (1952) | 9.0°F (1983) | 0.66 in (2016) |
| September 23 | 82.0°F (1952) | 5.0°F (1983) | 0.83 in (2017) |
| September 24 | 82.9°F (1952) | 19.0°F (1996) | 0.60 in (1934) |
| September 25 | 82.9°F (1952) | 12.9°F (1958) | 0.45 in (1955) |
| September 26 | 86.0°F (2001) | 15.1°F (1972) | 0.25 in (1986) |
| September 27 | 81.0°F (1963) | 10.9°F (1975) | 1.94 in (2014) |
| September 28 | 84.0°F (2024) | 16.0°F (1950) | 0.70 in (2014) |
| September 29 | 84.0°F (1952) | 12.0°F (1985) | 0.40 in (1940) |
| September 30 | 97.0°F (1995) | 12.9°F (1985) | 0.55 in (2022) |