Thompson, IA Weather & Growing Conditions
Tonight
56°F
Cloudy
Cloudy. Low around 56, with temperatures rising to around 58 overnight. North northeast wind 8 to 12 mph, with gusts as high as 18 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Cloudy | 8 to 12 mph NNE | 12% |
| Sunday | 66°F | Mostly Cloudy | 12 to 15 mph NE | 5% |
| Sunday Night | 49°F | Cloudy then Chance Rain Showers | 8 to 12 mph ENE | 34% |
| Monday | 58°F | Rain Showers Likely | 12 mph ENE | 56% |
| Monday Night | 45°F | Rain Showers Likely then Mostly Cloudy | 5 to 8 mph NE | 56% |
| Tuesday | 60°F | Mostly Sunny | 5 to 8 mph ENE | 7% |
| Tuesday Night | 43°F | Partly Cloudy | 2 to 6 mph E | 1% |
| Wednesday | 64°F | Mostly Sunny | 6 mph ESE | 0% |
| Wednesday Night | 48°F | Partly Cloudy | 5 mph SE | 13% |
| Thursday | 66°F | Slight Chance Rain Showers | 3 to 8 mph SSE | 22% |
| Thursday Night | 53°F | Slight Chance Rain Showers | 5 mph SE | 16% |
| Friday | 70°F | Partly Sunny | 2 to 7 mph SE | 12% |
| Friday Night | 55°F | Mostly Cloudy | 5 mph SE | 12% |
| Saturday | 69°F | Chance Rain Showers | 5 to 12 mph SSE | 25% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Thompson, IA
Last spring frost
Apr 30
First fall frost
Oct 7
Growing season
159 days
Hardiness zone
5a
Explore more for Thompson, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Forest City 2 Nne, Ia (11.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.