Hopkinton, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hopkinton, a city in Delaware County, Iowa.
Overnight
50°F
Mostly Cloudy
Mostly cloudy. Low around 50, with temperatures rising to around 53 overnight. Southwest wind around 10 mph.
7-day forecast for Hopkinton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 50°F | Mostly Cloudy | 10 mph SW | 14% |
| Wednesday | 52°F | Chance Rain Showers | 10 to 15 mph SW | 40% |
| Wednesday Night | 44°F | Chance Rain Showers | 10 to 15 mph SW | 30% |
| Thursday | 53°F | Chance Rain Showers | 10 mph NW | 53% |
| Thursday Night | 37°F | Mostly Cloudy | 5 to 10 mph N | 11% |
| Friday | 49°F | Mostly Sunny | 5 to 10 mph N | 1% |
| Friday Night | 29°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 1% |
| Saturday Night | 33°F | Mostly Clear | 0 to 5 mph W | 2% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 3% |
| Sunday Night | 34°F | Clear | 0 to 5 mph W | 0% |
| Monday | 62°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 61°F | Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Hopkinton (42.343, -91.249). Updated through the day.
Growing snapshot for Hopkinton
Last spring frost
Apr 28
First fall frost
Oct 10
Growing season
164 days
Hardiness zone
5a
More local growing data for Hopkinton: nearby ZIP 52237 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Cascade, Ia (12.6 mi from Hopkinton). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.