Thompson, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thompson, a city in Winnebago County, Iowa.
Today
48°F
Rain Showers Likely
Rain showers likely. Cloudy. High near 48, with temperatures falling to around 46 in the afternoon. West wind around 17 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Thompson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 48°F | Rain Showers Likely | 17 mph W | 64% |
| Tonight | 41°F | Rain Showers Likely | 13 to 16 mph WNW | 67% |
| Thursday | 48°F | Chance Rain Showers then Cloudy | 13 to 16 mph NNW | 34% |
| Thursday Night | 32°F | Mostly Cloudy | 5 to 12 mph N | 3% |
| Friday | 45°F | Mostly Sunny | 2 to 6 mph NNE | 1% |
| Friday Night | 26°F | Partly Cloudy | 1 mph SW | 1% |
| Saturday | 49°F | Sunny | 1 to 7 mph SW | 1% |
| Saturday Night | 32°F | Mostly Clear | 5 mph W | 2% |
| Sunday | 55°F | Sunny | 7 mph W | 1% |
| Sunday Night | 34°F | Mostly Clear | 6 mph SW | 0% |
| Monday | 61°F | Sunny | 7 to 12 mph SW | 0% |
| Monday Night | 37°F | Mostly Clear | 2 to 6 mph WNW | 0% |
| Tuesday | 58°F | Mostly Sunny | 5 mph NW | 0% |
| Tuesday Night | 38°F | Partly Cloudy | 3 mph WSW | 0% |
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 4, 2026.