McGregor, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McGregor, a city in Clayton County, Iowa.
Tonight
61°F
Chance Showers And Thunderstorms then Showers And Thunderstorms
A chance of showers and thunderstorms before midnight, then showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 61. East wind 7 to 12 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for McGregor
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 7 to 12 mph E | 96% |
| Saturday | 72°F | Showers And Thunderstorms | 5 to 9 mph S | 92% |
| Saturday Night | 58°F | Showers And Thunderstorms | 6 to 10 mph N | 84% |
| Sunday | 68°F | Chance Rain Showers | 12 mph NE | 43% |
| Sunday Night | 53°F | Mostly Cloudy | 8 to 12 mph NE | 10% |
| Monday | 64°F | Chance Rain Showers | 10 mph NE | 41% |
| Monday Night | 48°F | Chance Rain Showers | 5 to 12 mph NE | 41% |
| Tuesday | 63°F | Chance Rain Showers then Partly Sunny | 5 to 8 mph NE | 29% |
| Tuesday Night | 45°F | Partly Cloudy | 1 to 6 mph NE | 6% |
| Wednesday | 67°F | Mostly Sunny | 1 to 5 mph NE | 2% |
| Wednesday Night | 49°F | Partly Cloudy | 2 mph NE | 2% |
| Thursday | 69°F | Partly Sunny | 2 mph NE | 7% |
| Thursday Night | 51°F | Partly Cloudy | 1 mph NE | 6% |
| Friday | 71°F | Mostly Sunny | 0 to 3 mph NE | 5% |
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 Sep 19, 2026.