Hopkinton, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hopkinton, a city in Delaware County, Iowa.
This Afternoon
76°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy. High near 76, with temperatures falling to around 74 in the afternoon. Southwest wind around 5 mph. Chance of precipitation is 70%.
7-day forecast for Hopkinton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Showers And Thunderstorms Likely | 5 mph SW | 71% |
| Tonight | 60°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 71% |
| Sunday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 45% |
| Sunday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 38% |
| Monday | 63°F | Rain Showers Likely | 15 mph NE | 65% |
| Monday Night | 49°F | Rain Showers Likely | 10 to 15 mph NE | 65% |
| Tuesday | 62°F | Chance Rain Showers | 10 mph NE | 45% |
| Tuesday Night | 47°F | Partly Cloudy | 5 to 10 mph NE | 7% |
| Wednesday | 64°F | Mostly Sunny | 5 to 10 mph NE | 2% |
| Wednesday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 66°F | Partly Sunny | 0 to 5 mph E | 10% |
| Thursday Night | 53°F | Slight Chance Rain Showers | 0 mph | 16% |
| Friday | 69°F | Partly Sunny | 0 to 5 mph E | 11% |
| Friday Night | 54°F | Mostly Cloudy | 0 mph | 9% |
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 Sep 20, 2026.