Clear Lake, IA Weather & Growing Conditions
This Afternoon
60°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. High near 60, with temperatures falling to around 57 in the afternoon. North wind around 9 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 60°F | Chance Rain Showers | 9 mph N | 30% |
| Tonight | 43°F | Showers And Thunderstorms | 8 to 12 mph NW | 91% |
| Wednesday | 50°F | Rain Showers | 12 to 16 mph W | 87% |
| Wednesday Night | 40°F | Rain Showers | 13 mph WNW | 87% |
| Thursday | 49°F | Rain Showers Likely | 14 mph NNW | 63% |
| Thursday Night | 34°F | Mostly Cloudy | 6 to 10 mph N | 14% |
| Friday | 47°F | Mostly Sunny | 2 to 7 mph NNE | 0% |
| Friday Night | 29°F | Partly Cloudy | 1 mph SSE | 1% |
| Saturday | 53°F | Mostly Sunny | 1 to 6 mph SW | 2% |
| Saturday Night | 33°F | Partly Cloudy | 6 mph W | 4% |
| Sunday | 57°F | Sunny | 7 mph W | 7% |
| Sunday Night | 35°F | Mostly Clear | 7 mph SW | 1% |
| Monday | 61°F | Mostly Sunny | 7 to 10 mph WSW | 0% |
| Monday Night | 37°F | Mostly Clear | 6 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Clear Lake, IA
Last spring frost
May 3
First fall frost
Oct 1
Growing season
150 days
Hardiness zone
5a
Explore more for Clear Lake, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Mason City Muni Ap, Ia (3.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.