Sully, IA Weather & Growing Conditions
Tonight
48°F
Cloudy then Chance Rain Showers
A chance of rain showers between midnight and 3am. Cloudy. Low around 48, with temperatures rising to around 50 overnight. 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 | Cloudy then Chance Rain Showers | 8 to 13 mph SW | 29% |
| Wednesday | 53°F | Mostly Cloudy then Chance Rain Showers | 15 mph W | 29% |
| Wednesday Night | 44°F | Mostly Cloudy then Slight Chance Rain Showers | 12 mph WSW | 17% |
| Thursday | 53°F | Chance Rain Showers | 12 mph WNW | 54% |
| Thursday Night | 41°F | Slight Chance Rain Showers then Mostly Cloudy | 8 mph NNW | 16% |
| Friday | 52°F | Partly Sunny | 5 to 8 mph N | 6% |
| Friday Night | 34°F | Partly Cloudy | 0 to 3 mph NNW | 0% |
| Saturday | 56°F | Partly Sunny | 0 to 3 mph WSW | 1% |
| Saturday Night | 37°F | Mostly Clear | 3 mph W | 4% |
| Sunday | 61°F | Sunny | 6 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 | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sully, IA
Last spring frost
May 3
First fall frost
Oct 6
Growing season
155 days
Hardiness zone
5b
Explore more for Sully, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Grinnell 3 Sw, Ia (12.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.