Cottage Grove, Minnesota Weather
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Climate of Cottage Grove: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Cottage Grove, with average daytime highs around 29°C. January is the coolest, when nights typically fall to about -15°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 44°C, so the seasons feel very different from each other.
The area receives about 840 mm of rain in a typical year. Most of it falls from May to June and August, and June is the wettest month at roughly 130 mm.
For outdoor plans and travel, July and September usually offer the most comfortable weather in Cottage Grove, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | -6° | -15° | 18 mm | 88% |
| Feb | -3° | -14° | 27 mm | 86% |
| Mar | 5° | -6° | 44 mm | 78% |
| Apr | 13° | 1° | 82 mm | 71% |
| May | 20° | 8° | 109 mm | 71% |
| Jun | 26° | 14° | 130 mm | 73% |
| Jul | 29° | 17° | 94 mm | 70% |
| Aug | 27° | 15° | 107 mm | 70% |
| Sep | 23° | 11° | 89 mm | 71% |
| Oct | 14° | 3° | 70 mm | 74% |
| Nov | 5° | -4° | 33 mm | 79% |
| Dec | -3° | -11° | 37 mm | 87% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Cottage Grove. Values describe typical conditions, not a forecast.
About Cottage Grove weather
Cottage Grove is one of many towns in Minnesota's humid continental climate, known for cold winters shaped by its northern latitude, about 30 km south-east of Minneapolis. Before the rains arrive, there's warm summers (June–August). Cooler months mean very cold winters (December–February) with heavy snow. This page shows live, auto-refreshing weather for Cottage Grove: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Chicago.
Frequently asked questions
Cottage Grove is about 30 km south-east of Minneapolis, in Minnesota.
Cottage Grove sees very cold winters (December–February) with heavy snow.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Cottage Grove's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Cottage Grove, with average daytime highs of about 29°C and nights around 17°C.
The coldest nights come in January, when the average low is about -15°C and daytime highs reach around -6°C. Frost is possible on clear, calm nights.
Cottage Grove receives about 840 mm of rain in a typical year. June is the wettest month at roughly 130 mm, and the main rainy period is May to June and August.
July and September usually offer the most comfortable weather in Cottage Grove, with mild daytime temperatures and little rain.
In November Cottage Grove typically sees daytime highs near 5°C and lows near -4°C, with about 33 mm of rain over the month and average humidity around 79%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
Live temperature for Cottage Grove is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Cottage Grove's day-to-day weather follows the broader pattern of Minnesota described above. See the hourly weather forecast or the air quality index for more detail.