Thompson, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thompson, a city in Winnebago County, Iowa.
This Afternoon
58°F
Rain Showers
Rain showers. Cloudy. High near 58, with temperatures falling to around 55 in the afternoon. North northwest wind around 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Thompson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 58°F | Rain Showers | 13 mph NNW | 83% |
| Tonight | 43°F | Rain Showers | 13 mph NNW | 96% |
| Wednesday | 49°F | Rain Showers | 13 to 16 mph W | 95% |
| Wednesday Night | 39°F | Rain Showers | 12 to 15 mph WNW | 88% |
| Thursday | 49°F | Rain Showers Likely | 13 to 16 mph NNW | 60% |
| Thursday Night | 33°F | Mostly Cloudy | 5 to 12 mph N | 10% |
| Friday | 46°F | Partly Sunny | 2 to 7 mph N | 0% |
| Friday Night | 29°F | Partly Cloudy | 1 mph SE | 1% |
| Saturday | 53°F | Mostly Sunny | 1 to 7 mph SW | 2% |
| Saturday Night | 33°F | Mostly Clear | 5 mph W | 4% |
| Sunday | 57°F | Sunny | 5 to 8 mph W | 6% |
| Sunday Night | 35°F | Mostly Clear | 7 mph SW | 1% |
| Monday | 60°F | Mostly Sunny | 8 to 13 mph WSW | 0% |
| Monday Night | 37°F | Mostly Clear | 7 mph WNW | 1% |
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 Nov 3, 2026.