Williams, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williams, a city in Hamilton County, Iowa.
Today
78°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 78, with temperatures falling to around 74 in the afternoon. Northwest wind around 9 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Williams
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Showers And Thunderstorms Likely | 9 mph NW | 62% |
| Tonight | 58°F | Showers And Thunderstorms Likely | 3 to 8 mph N | 59% |
| Wednesday | 75°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 6 mph NE | 19% |
| Wednesday Night | 53°F | Mostly Clear | 3 mph ENE | 3% |
| Thursday | 80°F | Sunny | 0 to 3 mph ESE | 1% |
| Thursday Night | 59°F | Mostly Clear | 5 mph SSE | 1% |
| Friday | 84°F | Sunny | 3 to 10 mph S | 7% |
| Friday Night | 64°F | Slight Chance Showers And Thunderstorms | 6 to 9 mph S | 22% |
| Saturday | 87°F | Slight Chance Showers And Thunderstorms then Sunny | 5 to 12 mph S | 15% |
| Saturday Night | 69°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 10 to 14 mph SSE | 17% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 12 mph SSE | 17% |
| Sunday Night | 68°F | Slight Chance Showers And Thunderstorms | 8 to 12 mph SSE | 32% |
| Monday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 13 mph SSE | 32% |
| Monday Night | 68°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph E | 32% |
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 Aug 4, 2026.