Sibley, IA Weather & Growing Conditions
Today
66°F
Patchy Fog
Patchy fog and a slight chance of rain showers before 5pm. Cloudy, with a high near 66. North wind around 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Patchy Fog | 10 mph N | 16% |
| Tonight | 55°F | Patchy Fog | 10 to 15 mph NNE | 9% |
| Sunday | 66°F | Cloudy | 15 mph NE | 8% |
| Sunday Night | 51°F | Chance Rain Showers | 10 to 15 mph ENE | 35% |
| Monday | 60°F | Chance Rain Showers | 10 mph ENE | 50% |
| Monday Night | 46°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph ENE | 25% |
| Tuesday | 62°F | Mostly Sunny | 5 to 10 mph E | 4% |
| Tuesday Night | 43°F | Mostly Clear | 5 mph ESE | 2% |
| Wednesday | 66°F | Mostly Sunny | 5 to 10 mph SE | 4% |
| Wednesday Night | 49°F | Partly Cloudy then Slight Chance Rain Showers | 5 mph SSE | 19% |
| Thursday | 68°F | Slight Chance Rain Showers | 5 to 10 mph SSE | 20% |
| Thursday Night | 52°F | Mostly Cloudy | 5 mph SE | 12% |
| Friday | 70°F | Partly Sunny | 5 to 10 mph SE | 12% |
| Friday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 10 mph SE | 19% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sibley, IA
Last spring frost
May 5
First fall frost
Oct 3
Growing season
152 days
Hardiness zone
4b
Explore more for Sibley, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Sibley, Ia (0.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.