Seymour, IA Weather & Growing Conditions
Overnight
46°F
Slight Chance Rain Showers
A slight chance of rain showers after 5am. Cloudy. Low around 46, with temperatures rising to around 48 overnight. West wind around 13 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Slight Chance Rain Showers | 13 mph W | 16% |
| Wednesday | 52°F | Slight Chance Rain Showers then Cloudy | 12 to 17 mph W | 19% |
| Wednesday Night | 43°F | Mostly Cloudy | 9 mph W | 7% |
| Thursday | 54°F | Slight Chance Rain Showers | 8 to 12 mph WNW | 20% |
| Thursday Night | 41°F | Slight Chance Rain Showers then Mostly Cloudy | 7 mph NNW | 16% |
| Friday | 50°F | Partly Sunny | 3 to 8 mph N | 7% |
| Friday Night | 31°F | Partly Cloudy | 2 mph NNE | 1% |
| Saturday | 52°F | Mostly Sunny | 0 to 3 mph WSW | 1% |
| Saturday Night | 34°F | Mostly Clear | 2 mph W | 1% |
| Sunday | 60°F | Sunny | 5 mph W | 1% |
| Sunday Night | 37°F | Clear | 3 mph SW | 0% |
| Monday | 65°F | Sunny | 3 to 9 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 65°F | Sunny | 3 mph NNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Seymour, IA
Last spring frost
Apr 21
First fall frost
Oct 19
Growing season
178 days
Hardiness zone
5b
Explore more for Seymour, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Allerton, Ia (12.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.