Lake Michigan Climate and Average Weather
Climate of Lake Michigan: average temperatures, rainfall and seasons month by month.
Climate in Lake Michigan month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 28° | 21° | 2,6 in | ★★☆☆☆ |
| February | 33° | 25° | 1,3 in | ★★☆☆☆ |
| March | 37° | 30° | 3,8 in | ★★☆☆☆ |
| April | 41° | 35° | 3,6 in | ★★★☆☆ |
| May | 47° | 41° | 4,0 in | ★★★☆☆ |
| June | 56° | 51° | 3,7 in | ★★★★☆ |
| July | 67° | 63° | 2,4 in | ★★★★☆ |
| August | 69° | 64° | 1,9 in | ★★★★☆ |
| September | 65° | 61° | 1,3 in | ★★★★☆ |
| October | 57° | 51° | 3,1 in | ★★★★☆ |
| November | 45° | 39° | 2,8 in | ★★★☆☆ |
| December | 36° | 29° | 2,4 in | ★★☆☆☆ |
Climate type: Subarctic. Source: Open-Meteo archive (ERA5).
Recent extremes in Lake Michigan
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Lake Michigan compares with nearby places
Annual averages, and the difference against Lake Michigan.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Milwaukee | 80 mi | 50°F | +37°F warmer | 35 in |
| Wisconsin | 136 mi | 49°F | +36°F warmer | 33 in |
| O'Hare International Airport | 147 mi | 52°F | +39°F warmer | 40 in |
| Wicker Park | 149 mi | 52°F | +39°F warmer | 38 in |
| ZIP Code 60601 | 149 mi | 52°F | +39°F warmer | 40 in |
Best time to visit Lake Michigan
Go in July, August and September. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, March and December - expect the least comfortable mix of heat, cold or rain.
What this means for Lake Michigan
Today is about average for August. The forecast high of 69°F is in line with the 69°F typical for this month.
A 25% chance means most of the area stays dry; a passing shower is possible but short.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 74°F.
What to pack, what to skip
- Normal seasonal clothing - nothing unusual is needed this week
- If your dates are flexible, avoid January, March and December - historically the least comfortable months here.
Summary
Lake Michigan is a lake in Illinois. Lake Michigan is a lake known as the only Great Lake entirely in the US.
Right now it is 67°F (20°C) in Lake Michigan with clear. It feels like 62°F. Today runs from 64°F to 69°F. Chance of precipitation is 25%. Sightseeing conditions score 8.4/10 - good conditions.
The best time to visit Lake Michigan is July, August and September. The climate is subarctic. January, March and December tend to be the least comfortable months. August is the warmest month with average highs near 69°F, while January is the coldest with lows near 21°F.
The closest major airport is O'Hare International Airport (ORD), about 147 mi away. Nearby highlights include Indiana Dunes National Park, Starved Rock State Park and Porcupine Mountains Wilderness State Park.
In plain terms. Today is about average for August. The forecast high of 69°F is in line with the 69°F typical for this month. The best window to be outside is roughly 6 PM to 9 PM, when temperature, rain chance and wind line up best. stargazing is the strongest bet in Lake Michigan today at 9.2/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Lake Michigan
| Type | Lake |
|---|---|
| State | Illinois |
| Country | United States |
| Continent | North America |
| Coordinates | 44°0′0″N 87°0′0″W (44, -87) |
| Maximum depth | 922 ft |
| Known for | the only Great Lake entirely in the US |
| Local time | 11:43 AM (UTC-04:00) |
| Best months | July, August and September |
| Climate | Subarctic |
Weather map for Lake Michigan
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore Lake Michigan
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
Frequently asked questions
Where is Lake Michigan?
Lake Michigan is a lake in Illinois. Its coordinates are 44, -87. It lies in North America.
What is the weather like in Lake Michigan right now?
It is currently 67°F (20°C) with clear. Humidity is 70% and wind is 17 mph.
When is the best time to visit Lake Michigan?
July, August and September offer the most comfortable conditions in Lake Michigan, which has a subarctic climate. January, March and December are usually the hardest months for outdoor plans.
What time zone is Lake Michigan in?
Lake Michigan observes America/Detroit (UTC-04:00). The local time is 11:43 AM.
What is the nearest airport to Lake Michigan?
The closest airports are O'Hare International Airport (ORD), 147 mi away.
What are the top things to do in Lake Michigan?
Popular options include Indiana Dunes National Park, Starved Rock State Park and Porcupine Mountains Wilderness State Park.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (lakes) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 23, 2026 at 11:43 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
