Sibley, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sibley, a city in Osceola County, Iowa.
Overnight
61°F
Areas Of Fog
Areas of fog. Cloudy. Low around 61, with temperatures rising to around 64 overnight. North northeast wind around 5 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Sibley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Areas Of Fog | 5 mph NNE | 14% |
| Saturday | 67°F | Areas Of Fog | 5 to 15 mph N | 28% |
| Saturday Night | 55°F | Patchy Fog | 10 to 15 mph NNE | 14% |
| Sunday | 66°F | Mostly Cloudy | 15 mph NE | 8% |
| Sunday Night | 51°F | Chance Rain Showers | 10 to 15 mph ENE | 36% |
| Monday | 60°F | Chance Rain Showers | 10 mph ENE | 51% |
| Monday Night | 45°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph E | 26% |
| Tuesday | 62°F | Partly Sunny | 5 to 10 mph E | 4% |
| Tuesday Night | 45°F | Partly Cloudy | 5 mph SE | 0% |
| Wednesday | 66°F | Mostly Sunny | 5 to 10 mph SSE | 6% |
| Wednesday Night | 50°F | Mostly Cloudy then Chance Rain Showers | 5 mph SSE | 25% |
| Thursday | 68°F | Chance Rain Showers | 5 to 10 mph SSE | 25% |
| Thursday Night | 52°F | Mostly Cloudy | 5 mph SE | 10% |
| Friday | 69°F | Partly Sunny | 5 to 10 mph SE | 10% |
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 Sep 19, 2026.