Swea City, IA Weather & Growing Conditions
Today
48°F
Rain Showers Likely
Rain showers likely. Cloudy. High near 48, with temperatures falling to around 46 in the afternoon. West northwest wind around 18 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 48°F | Rain Showers Likely | 18 mph WNW | 66% |
| Tonight | 40°F | Rain Showers Likely | 14 to 17 mph WNW | 61% |
| Thursday | 46°F | Chance Rain Showers then Cloudy | 13 to 17 mph NNW | 31% |
| Thursday Night | 32°F | Mostly Cloudy | 5 to 12 mph N | 4% |
| Friday | 46°F | Mostly Sunny | 5 mph NNE | 0% |
| Friday Night | 27°F | Partly Cloudy | 2 mph SE | 0% |
| Saturday | 49°F | Mostly Sunny | 2 to 8 mph SW | 0% |
| Saturday Night | 33°F | Mostly Clear | 7 mph W | 1% |
| Sunday | 55°F | Sunny | 7 mph W | 1% |
| Sunday Night | 35°F | Mostly Clear | 5 to 8 mph SW | 0% |
| Monday | 61°F | Sunny | 7 to 12 mph WSW | 0% |
| Monday Night | 37°F | Mostly Clear | 6 mph WNW | 0% |
| Tuesday | 57°F | Mostly Sunny | 5 mph NW | 0% |
| Tuesday Night | 38°F | Partly Cloudy | 5 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Swea City, IA
Last spring frost
May 4
First fall frost
Oct 1
Growing season
150 days
Hardiness zone
5a
Explore more for Swea City, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Swea City 5N, Ia (3.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.