Lake Crystal, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lake Crystal, a city in Blue Earth County, Minnesota.
Tonight
59°F
Patchy Fog
Patchy fog and showers and thunderstorms before 10pm, then patchy fog and a chance of showers and thunderstorms between 10pm and 1am, then a chance of drizzle and a slight chance of thunderstorms. Cloudy. Low around 59, with temperatures rising to around 62 overnight. East northeast wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Lake Crystal
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Patchy Fog | 10 mph ENE | 83% |
| Saturday | 65°F | Chance Drizzle | 10 mph NNE | 28% |
| Saturday Night | 55°F | Slight Chance Drizzle then Mostly Cloudy | 10 mph NNE | 20% |
| Sunday | 67°F | Mostly Cloudy | 10 to 15 mph NE | 5% |
| Sunday Night | 51°F | Mostly Cloudy then Slight Chance Rain Showers | 10 mph ENE | 16% |
| Monday | 62°F | Chance Rain Showers | 10 mph ENE | 38% |
| Monday Night | 47°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph ENE | 38% |
| Tuesday | 63°F | Partly Sunny | 5 to 10 mph E | 5% |
| Tuesday Night | 45°F | Partly Cloudy | 5 mph ESE | 1% |
| Wednesday | 65°F | Sunny | 5 mph SE | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 5 mph SSE | 13% |
| Thursday | 69°F | Mostly Sunny | 5 mph SSE | 14% |
| Thursday Night | 52°F | Partly Cloudy | 5 mph SSE | 6% |
| Friday | 70°F | Mostly Sunny | 5 mph SE | 7% |
Forecast source: National Weather Service (api.weather.gov) for Lake Crystal (44.105, -94.219). Updated through the day.
Growing snapshot for Lake Crystal
Last spring frost
Apr 30
First fall frost
Oct 9
Growing season
161 days
Hardiness zone
5a
More local growing data for Lake Crystal: nearby ZIP 56055 weather · frost dates · planting calendar · Minnesota frost dates
Nearby towns & communities
Amboy
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Garden City
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Minnesota Lake
Pemberton
Skyline
St. Clair
Vernon Center
Climate data from the nearest NOAA station, Mankato, Mn (10.8 mi from Lake Crystal). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.