Waterloo, IN Weather & Growing Conditions
Tonight
57°F
Partly Cloudy then Slight Chance Rain Showers
A slight chance of rain showers after 5am. Partly cloudy, with a low around 57. East wind around 5 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Partly Cloudy then Slight Chance Rain Showers | 5 mph E | 16% |
| Saturday | 74°F | Showers And Thunderstorms | 5 to 10 mph E | 90% |
| Saturday Night | 63°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph S | 84% |
| Sunday | 72°F | Showers And Thunderstorms | 5 to 10 mph N | 81% |
| Sunday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 52% |
| Monday | 64°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 48% |
| Monday Night | 50°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 35% |
| Tuesday | 64°F | Mostly Cloudy then Slight Chance Rain Showers | 15 mph NE | 19% |
| Tuesday Night | 52°F | Slight Chance Rain Showers | 10 to 15 mph NE | 22% |
| Wednesday | 64°F | Slight Chance Rain Showers | 10 mph NE | 22% |
| Wednesday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 18% |
| Thursday | 67°F | Partly Sunny | 5 to 10 mph N | 8% |
| Thursday Night | 51°F | Mostly Cloudy | 5 to 10 mph NE | 7% |
| Friday | 69°F | Mostly Sunny | 5 to 10 mph N | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Waterloo, IN
Last spring frost
May 2
First fall frost
Oct 10
Growing season
159 days
Hardiness zone
6a
Explore more for Waterloo, IN: full frost dates · planting calendar · Indiana frost dates
Climate data from the nearest NOAA station, Garrett 1 S, In (9.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.