Clear Lake, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Clear Lake, a city in Cerro Gordo County, Iowa.
This Afternoon
61°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 61, with temperatures falling to around 58 in the afternoon. North northwest wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Clear Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 61°F | Showers And Thunderstorms Likely | 10 mph NNW | 65% |
| Tonight | 43°F | Rain Showers | 10 mph NW | 90% |
| Wednesday | 50°F | Rain Showers | 12 to 16 mph W | 86% |
| Wednesday Night | 40°F | Rain Showers | 13 mph WNW | 85% |
| 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 | Partly Sunny | 2 to 7 mph NNE | 0% |
| Friday Night | 29°F | Partly Cloudy | 1 mph NNW | 1% |
| Saturday | 52°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) for Clear Lake (43.135, -93.374). Updated through the day.
Growing snapshot for Clear Lake
Last spring frost
May 3
First fall frost
Oct 1
Growing season
150 days
Hardiness zone
5a
More local growing data for Clear Lake: nearby ZIP 50428 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mason City Muni Ap, Ia (3.4 mi from Clear Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.