Williams, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williams, a city in Hamilton County, Iowa.
This Afternoon
64°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 64, with temperatures falling to around 59 in the afternoon. North northwest wind around 12 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Williams
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Showers And Thunderstorms Likely | 12 mph NNW | 66% |
| Tonight | 44°F | Showers And Thunderstorms | 8 to 12 mph NW | 84% |
| Wednesday | 51°F | Chance Rain Showers | 12 to 17 mph W | 47% |
| Wednesday Night | 41°F | Rain Showers Likely | 9 to 13 mph W | 66% |
| Thursday | 51°F | Rain Showers Likely | 13 mph NW | 62% |
| Thursday Night | 36°F | Slight Chance Rain Showers then Mostly Cloudy | 6 to 9 mph N | 21% |
| Friday | 50°F | Partly Sunny | 2 to 7 mph NNE | 2% |
| Friday Night | 31°F | Partly Cloudy | 1 mph N | 0% |
| Saturday | 55°F | Mostly Sunny | 0 to 5 mph WSW | 2% |
| Saturday Night | 35°F | Partly Cloudy | 3 mph W | 3% |
| Sunday | 60°F | Sunny | 6 mph W | 6% |
| Sunday Night | 37°F | Mostly Clear | 6 mph SW | 2% |
| Monday | 63°F | Sunny | 6 to 10 mph WSW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Williams (42.489, -93.541). Updated through the day.
Growing snapshot for Williams
Last spring frost
May 3
First fall frost
Oct 2
Growing season
150 days
Hardiness zone
5a
More local growing data for Williams: nearby ZIP 50271 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Webster City, Ia (12.9 mi from Williams). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.