Thompson, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thompson, a city in Winnebago County, Iowa.
Today
72°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 72, with temperatures falling to around 70 in the afternoon. Northwest wind 7 to 12 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Thompson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Showers And Thunderstorms Likely | 7 to 12 mph NW | 62% |
| Tonight | 55°F | Chance Showers And Thunderstorms then Mostly Cloudy | 1 to 7 mph NW | 38% |
| Wednesday | 73°F | Mostly Sunny | 3 mph N | 1% |
| Wednesday Night | 53°F | Mostly Clear | 2 mph SE | 1% |
| Thursday | 78°F | Sunny | 2 to 8 mph S | 1% |
| Thursday Night | 60°F | Mostly Clear | 8 mph S | 4% |
| Friday | 82°F | Sunny | 7 to 13 mph S | 11% |
| Friday Night | 64°F | Slight Chance Showers And Thunderstorms | 7 to 12 mph S | 21% |
| Saturday | 84°F | Slight Chance Showers And Thunderstorms | 6 to 12 mph S | 15% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 13 mph SW | 34% |
| Sunday | 84°F | Chance Showers And Thunderstorms then Mostly Sunny | 10 mph SSE | 34% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms | 9 mph SE | 34% |
| Monday | 82°F | Chance Showers And Thunderstorms | 12 mph E | 34% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms | 10 mph ENE | 35% |
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 Aug 4, 2026.