Twain Weather Forecast
- 63
- 88
Mostly Sunny
- 63
- 89
Chance Rain Showers
- 61
- 82
Chance Thunderstorms
- 62
- 83
Chance Thunderstorms
- 63
- 83
Chance Rain Showers
- 60
- 83
Chance Thunderstorms
Today 17 Sep Johnson
Sunny. Highs in the upper 80s. Southeast Winds around 5 Mph.
Tonight 17 Sep Johnson
Mostly clear. Lows in the lower 60s. East Winds around 5 Mph.
Twain Temperature Statistics
September Temperature
Iowa City Municipal Airport (1.2 miles)
Lowest 7 September, 2025
41 °FAverage September
67.4 °FHighest 14 September, 2025
96.1 °F
Climate (2020–Present)
Iowa City Municipal Airport (1.2 miles)
Average Low 2020–2025
42.3 °FAverage 2020–2025
52.5 °FAverage High 2020–2025
62.6 °F