Sibley, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sibley, a city in Osceola County, Iowa.
Overnight
39°F
Rain Showers Likely
Rain showers likely. Cloudy. Low around 39, with temperatures rising to around 42 overnight. 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 |
|---|---|---|---|---|
| Overnight | 39°F | Rain Showers Likely | 15 mph NW | 65% |
| Wednesday | 45°F | Rain Showers Likely | 15 mph WNW | 68% |
| Wednesday Night | 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 | 34°F | Mostly Clear | 5 mph W | 4% |
| Sunday | 57°F | Sunny | 5 to 10 mph WSW | 3% |
| Sunday Night | 37°F | Mostly Clear | 5 to 10 mph SSW | 1% |
| Monday | 60°F | Sunny | 10 mph W | 0% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph NW | 0% |
| Tuesday | 57°F | Mostly Sunny | 5 mph W | 1% |
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.