Sumner Weather Forecast
- 50
- 81
Sunny
- 59
- 79
Mostly Sunny
- 54
- 75
Rain Showers
- 43
- 66
Chance Rain Showers
- 45
- 64
Mostly Cloudy
- 49
- 65
Chance Rain Showers
- 43
- 61
Chance Rain Showers
Today 21 Apr Bremer
Sunny. Not as cool with Highs in the upper 70s. West Winds 5 to 10 Mph.
Tonight 21 Apr Bremer
Mostly clear. Lows around 50. West Winds around 5 Mph, becoming east after midnight.
Sumner Temperature Statistics
April Temperature
Oelwein Municipal Airport (12.4 miles)
Lowest 7 April, 2026
23 °FAverage April
47.1 °FHighest 17 April, 2026
80.6 °F
Climate (2021–Present)
Oelwein Municipal Airport (12.4 miles)
Average Low 2021–2026
38.6 °FAverage 2021–2026
48.4 °FAverage High 2021–2026
58.2 °F