Waterloo Weather Forecast
- 47
- 71
Mostly Sunny
- 56
- 72
Mostly Cloudy
- 52
- 81
Rain Showers
- 41
- 61
Chance Rain Showers
- 48
- 66
Chance Rain Showers
- 41
- 63
Slight Chance Rain Showers
- 40
- 59
Mostly Sunny
Today 16 Oct Johnson
Mostly sunny. Highs around 70. East Winds around 5 Mph.
Tonight 16 Oct Johnson
Mostly clear. Lows in the upper 40s. East Winds around 5 Mph.
Waterloo Temperature Statistics
October Temperature
Indianapolis International Airport (11.8 miles)
Lowest 9 October, 2025
44.1 °FAverage October
65.1 °FHighest 3 October, 2025
84.9 °F
Climate (2020–Present)
Indianapolis International Airport (11.8 miles)
Average Low 2020–2025
46.7 °FAverage 2020–2025
55.5 °FAverage High 2020–2025
64.8 °F