McGregor, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McGregor, a city in Clayton County, Iowa.
Today
80°F
Mostly Cloudy then Scattered Showers And Thunderstorms
Scattered rain showers between 1pm and 4pm, then scattered showers and thunderstorms between 4pm and 5pm, then scattered showers and thunderstorms. Mostly cloudy. High near 80, with temperatures falling to around 76 in the afternoon. West wind around 7 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for McGregor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Mostly Cloudy then Scattered Showers And Thunderstorms | 7 mph W | 44% |
| Tonight | 61°F | Scattered Showers And Thunderstorms | 1 to 5 mph NW | 64% |
| Wednesday | 76°F | Slight Chance Rain Showers then Partly Sunny | 3 mph NW | 20% |
| Wednesday Night | 55°F | Partly Cloudy | 0 to 3 mph S | 5% |
| Thursday | 80°F | Sunny | 1 mph S | 3% |
| Thursday Night | 59°F | Mostly Clear | 1 mph S | 0% |
| Friday | 83°F | Sunny | 0 to 6 mph S | 4% |
| Friday Night | 64°F | Mostly Clear | 5 mph S | 11% |
| Saturday | 85°F | Mostly Sunny | 2 to 6 mph SW | 9% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 6 mph S | 34% |
| Sunday | 86°F | Chance Showers And Thunderstorms | 8 mph SW | 34% |
| Sunday Night | 67°F | Chance Showers And Thunderstorms | 2 to 7 mph S | 43% |
| Monday | 84°F | Chance Showers And Thunderstorms | 6 mph S | 43% |
| Monday Night | 67°F | Slight Chance Showers And Thunderstorms | 3 to 7 mph NE | 34% |
Forecast source: National Weather Service (api.weather.gov) for McGregor (43.028, -91.186). Updated through the day.
Growing snapshot for McGregor
Last spring frost
Apr 28
First fall frost
Oct 12
Growing season
166 days
Hardiness zone
5a
More local growing data for McGregor: nearby ZIP 52158 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Clayton
Colesburg
Edgewood
Elkader
Elkport
Farmersburg
Garber
Garnavillo
Guttenberg
Luana
Marquette
North Buena Vista
Osterdock
St. Olaf
Strawberry Point
Volga
Climate data from the nearest NOAA station, Prairie Du Chien, Wi (3 mi from McGregor). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.