Williamsburg, IA Weather & Growing Conditions
Today
85°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2pm. Partly sunny. High near 85, with temperatures falling to around 83 in the afternoon. West wind 5 to 10 mph. Chance of precipitation is 40%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Partly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph W | 39% |
| Tonight | 64°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 87% |
| Wednesday | 76°F | Showers And Thunderstorms | 5 mph N | 78% |
| Wednesday Night | 58°F | Chance Showers And Thunderstorms | 5 mph NE | 47% |
| Thursday | 81°F | Slight Chance Rain Showers then Mostly Sunny | 5 mph NE | 23% |
| Thursday Night | 59°F | Mostly Clear | 0 to 5 mph E | 2% |
| Friday | 84°F | Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 65°F | Mostly Clear | 5 mph S | 13% |
| Saturday | 87°F | Sunny | 5 to 10 mph S | 10% |
| Saturday Night | 70°F | Mostly Clear | 10 mph S | 13% |
| Sunday | 88°F | Mostly Sunny | 10 mph S | 13% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 10 mph S | 34% |
| Monday | 88°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 34% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 31% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Williamsburg, IA
Last spring frost
Apr 28
First fall frost
Oct 9
Growing season
164 days
Hardiness zone
5b
Explore more for Williamsburg, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Williamsburg 1E, Ia (1.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.