Portland Weather Forecast
- 65
- 87
Decreasing Clouds
- 64
- 89
Mostly Sunny
- 61
- 89
Partly Sunny
- 63
- 89
Mostly Sunny
- 64
- 91
Partly Sunny
- 63
- 90
Chance Rain Showers
- 62
- 86
Chance Rain Showers
Today 14 Sep Sumner
Partly sunny. Near steady temperature in the upper 80s. South Winds around 5 Mph.
Tonight 14 Sep Sumner
Partly cloudy this Evening, then clearing. Lows in the mid 60s. Southeast Winds around 5 Mph.
Portland Temperature Statistics
September Temperature
Springfield Robertson County Airport (22.4 miles)
Lowest 8 September, 2025
48.2 °FAverage September
70 °FHighest 5 September, 2025
91.4 °F
Climate (2020–Present)
Springfield Robertson County Airport (22.4 miles)
Average Low 2020–2025
49.7 °FAverage 2020–2025
59.6 °FAverage High 2020–2025
69.6 °F