|
Typical Richland September Weather 1991–2020 |
||
|---|---|---|
| Average daily high | 80.4 °F | |
| Average daily low | 48.2 °F | |
| Average monthly precipitation | 0.3 inches | |
| Daily chance of precipitation | 9.6% | |
|
Richland September Weather Records 1894–2024 |
||
|---|---|---|
| Highest temperature | 106 °F | September 3, 1950 |
| Lowest temperature | 21 °F | September 24, 1926 |
| Highest daily low | 70 °F | September 8, 2017 |
| Lowest daily high | 50 °F | September 29, 2019 |
| Hottest average high temperature | 87.9 °F | 1967 |
| Coldest average high temperature | 70.9 °F | 1895 |
| Most daily precipitation | 0.9 inches | September 4, 1911 |
| Most monthly precipitation | 1.8 inches | 1927 |
| Day | Average (°F) | Record (°F) | ||
|---|---|---|---|---|
| High | Low | High | Low | |
| September 1 | 85.7 | 52.5 | 102 | 38 |
| September 2 | 85.2 | 52.3 | 104 | 39 |
| September 3 | 84.7 | 52.1 | 106 | 39 |
| September 4 | 84.3 | 51.8 | 101 | 38 |
| September 5 | 83.9 | 51.5 | 99 | 38 |
| September 6 | 83.6 | 51.2 | 101 | 40 |
| September 7 | 83.3 | 50.8 | 101 | 39 |
| September 8 | 82.9 | 50.5 | 100 | 36 |
| September 9 | 82.5 | 50.2 | 100 | 38 |
| September 10 | 82.2 | 49.9 | 97 | 34 |
| September 11 | 81.8 | 49.6 | 97 | 37 |
| September 12 | 81.4 | 49.3 | 98 | 29 |
| September 13 | 81.1 | 48.9 | 97 | 28 |
| September 14 | 80.8 | 48.5 | 100 | 36 |
| September 15 | 80.5 | 48.3 | 96 | 32 |
| September 16 | 80.2 | 48.1 | 97 | 34 |
| September 17 | 79.8 | 47.9 | 95 | 32 |
| September 18 | 79.4 | 47.6 | 97 | 30 |
| September 19 | 79.0 | 47.3 | 96 | 37 |
| September 20 | 78.5 | 47.0 | 94 | 33 |
| September 21 | 78.1 | 46.7 | 95 | 31 |
| September 22 | 77.7 | 46.4 | 98 | 34 |
| September 23 | 77.3 | 46.1 | 93 | 28 |
| September 24 | 76.9 | 45.9 | 94 | 21 |
| September 25 | 76.4 | 45.6 | 96 | 26 |
| September 26 | 75.8 | 45.3 | 99 | 25 |
| September 27 | 75.2 | 45.0 | 96 | 29 |
| September 28 | 74.6 | 44.7 | 92 | 28 |
| September 29 | 74.2 | 44.4 | 91 | 29 |
| September 30 | 73.7 | 44.1 | 91 | 31 |