Harman US

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

WhenTempForecastWindPrecip
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.