Williamsburg, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williamsburg, a city in Iowa County, Iowa.
Today
51°F
Cloudy
Cloudy, with a high near 51. West wind around 15 mph, with gusts as high as 25 mph.
7-day forecast for Williamsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 51°F | Cloudy | 15 mph W | 14% |
| Tonight | 44°F | Cloudy | 10 to 15 mph W | 13% |
| Thursday | 54°F | Rain Showers Likely | 10 to 15 mph NW | 65% |
| Thursday Night | 39°F | Mostly Cloudy | 10 mph N | 11% |
| Friday | 49°F | Mostly Sunny | 5 to 10 mph N | 1% |
| Friday Night | 29°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 51°F | Mostly Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 34°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 57°F | Sunny | 5 mph W | 2% |
| Sunday Night | 35°F | Clear | 5 mph SW | 0% |
| Monday | 63°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 62°F | Sunny | 5 mph NW | 0% |
| Tuesday Night | 41°F | Partly Cloudy | 0 to 5 mph NE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Williamsburg (41.669, -92.013). Updated through the day.
Growing snapshot for Williamsburg
Last spring frost
Apr 28
First fall frost
Oct 9
Growing season
164 days
Hardiness zone
5b
More local growing data for Williamsburg: nearby ZIP 52361 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Amana
Conroy
East Amana
High Amana
Homestead
Ladora
Marengo
Middle Amana
Millersburg
North English
Parnell
South Amana
Victor
West Amana
Climate data from the nearest NOAA station, Williamsburg 1E, Ia (1.9 mi from Williamsburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.