Weather history and climate summary information is available for the following locations:
- Eugene
- Medford
- Pendleton
- Portland
Warmest September Days
The warmest September days in Oregon are:
| Medford, Oregon | 1988 | 109.9°F |
| Medford, Oregon | 1998 | 107.1°F |
| Portland, Oregon | 1988 | 105.1°F |
| Medford, Oregon | 2003 | 104°F |
| Medford, Oregon | 1981 | 104°F |
Coldest September Days
The coldest September days in Oregon were:
| Pendleton, Oregon | 2000 | 30°F |
| Pendleton, Oregon | 1985 | 30.9°F |
| Eugene, Oregon | 1999 | 30.9°F |
| Eugene, Oregon | 2000 | 30.9°F |
| Medford, Oregon | 1978 | 32°F |
Wettest September Days
The wettest single days in September occurred:
| Portland, Oregon | 1996 | 2.5 inches |
| Portland, Oregon | 1982 | 2 inches |
| Medford, Oregon | 1983 | 2 inches |
| Eugene, Oregon | 1981 | 1.7 inches |
| Medford, Oregon | 1977 | 1.5 inches |