Lewistown Weather Forecast
- 54
- 75
Mostly Sunny
- 54
- 82
Slight Chance Thunderstorms
- 48
- 77
Sunny
- 59
- 76
Chance Rain Showers
- 63
- 86
Chance Thunderstorms
- 62
- 86
Partly Sunny
Today 11 May Lewis
Sunny. Highs in the mid 70s. Northwest Winds around 5 Mph.
Tonight 11 May Lewis
Clear. Lows in the mid 40s. West Winds around 5 Mph.
Lewistown Temperature Statistics
May Temperature
Keokuk Municipal Airport (32.9 miles)
Lowest 1 May, 2026
35.6 °FAverage May
54.8 °FHighest 4 May, 2026
78.8 °F
Climate (2021–Present)
Keokuk Municipal Airport (32.9 miles)
Average Low 2021–2026
43.9 °FAverage 2021–2026
53.7 °FAverage High 2021–2026
63.4 °F