Thompson, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thompson, a city in Winnebago County, Iowa.
Today
69°F
Patchy Fog
Patchy fog and a chance of showers and thunderstorms. Mostly cloudy, with a high near 69. North northeast wind 6 to 9 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Thompson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Patchy Fog | 6 to 9 mph NNE | 42% |
| Tonight | 55°F | Slight Chance Rain Showers then Cloudy | 12 mph NNE | 23% |
| Sunday | 66°F | Partly Sunny | 12 to 15 mph NE | 9% |
| Sunday Night | 50°F | Mostly Cloudy then Chance Rain Showers | 9 to 13 mph ENE | 27% |
| Monday | 61°F | Chance Rain Showers | 12 mph ENE | 28% |
| Monday Night | 45°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 8 mph ENE | 22% |
| Tuesday | 62°F | Mostly Sunny | 5 to 8 mph E | 5% |
| Tuesday Night | 42°F | Mostly Clear | 2 to 6 mph ESE | 1% |
| Wednesday | 65°F | Sunny | 6 mph ESE | 2% |
| Wednesday Night | 47°F | Partly Cloudy then Slight Chance Rain Showers | 3 mph SE | 15% |
| Thursday | 66°F | Slight Chance Rain Showers then Mostly Sunny | 2 to 6 mph SE | 15% |
| Thursday Night | 51°F | Partly Cloudy | 3 mph SE | 4% |
| Friday | 69°F | Mostly Sunny | 2 to 7 mph SE | 5% |
| Friday Night | 52°F | Partly Cloudy | 5 mph SE | 12% |
Forecast source: National Weather Service (api.weather.gov) for Thompson (43.370, -93.775). Updated through the day.
Growing snapshot for Thompson
Last spring frost
Apr 30
First fall frost
Oct 7
Growing season
159 days
Hardiness zone
5a
More local growing data for Thompson: nearby ZIP 50478 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Forest City 2 Nne, Ia (11.5 mi from Thompson). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.