Sibley, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sibley, a city in Osceola County, Iowa.
Today
45°F
Rain Showers Likely
Rain showers likely. Cloudy, with a high near 45. West northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Sibley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 45°F | Rain Showers Likely | 15 mph WNW | 68% |
| Tonight | 38°F | Chance Rain Showers | 10 to 15 mph NW | 54% |
| Thursday | 45°F | Mostly Cloudy | 10 to 15 mph NNW | 5% |
| Thursday Night | 31°F | Mostly Cloudy | 5 to 10 mph N | 0% |
| Friday | 45°F | Mostly Sunny | 0 to 5 mph ENE | 0% |
| Friday Night | 28°F | Partly Cloudy | 0 to 5 mph SSE | 0% |
| Saturday | 49°F | Mostly Sunny | 5 to 10 mph SW | 1% |
| Saturday Night | 33°F | Mostly Clear | 5 mph W | 0% |
| Sunday | 54°F | Sunny | 5 to 10 mph WSW | 0% |
| Sunday Night | 37°F | Mostly Clear | 5 mph SSW | 0% |
| Monday | 60°F | Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 37°F | Mostly Clear | 5 mph NW | 0% |
| Tuesday | 57°F | Mostly Sunny | 5 mph WNW | 0% |
| Tuesday Night | 39°F | Partly Cloudy | 5 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov) for Sibley (43.401, -95.743). Updated through the day.
Growing snapshot for Sibley
Last spring frost
May 5
First fall frost
Oct 3
Growing season
152 days
Hardiness zone
4b
More local growing data for Sibley: nearby ZIP 51249 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Sibley, Ia (0.9 mi from Sibley). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.