Sully, IA Weather & Growing Conditions
Tonight
48°F
Chance Rain Showers
A chance of rain showers before 3am. Cloudy, with a low around 48. Southwest wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Chance Rain Showers | 8 to 13 mph SW | 30% |
| Wednesday | 53°F | Mostly Cloudy then Chance Rain Showers | 13 to 16 mph W | 28% |
| Wednesday Night | 44°F | Mostly Cloudy then Slight Chance Rain Showers | 12 mph WSW | 18% |
| Thursday | 53°F | Chance Rain Showers | 12 mph WNW | 54% |
| Thursday Night | 41°F | Slight Chance Rain Showers then Mostly Cloudy | 8 mph NNW | 15% |
| Friday | 53°F | Partly Sunny | 5 to 8 mph N | 6% |
| Friday Night | 34°F | Mostly Cloudy | 3 mph NNW | 0% |
| Saturday | 56°F | Partly Sunny | 1 to 5 mph WSW | 1% |
| Saturday Night | 37°F | Mostly Clear | 5 mph W | 4% |
| Sunday | 62°F | Sunny | 3 to 7 mph W | 5% |
| Sunday Night | 38°F | Mostly Clear | 5 mph SW | 2% |
| Monday | 65°F | Sunny | 5 to 9 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 6 mph WNW | 0% |
| Tuesday | 64°F | Sunny | 6 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sully, IA
Last spring frost
Apr 22
First fall frost
Oct 17
Growing season
174 days
Hardiness zone
5b
Explore more for Sully, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Newton, Ia (9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.