Tinley Park, Illinois Weather
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Climate of Tinley Park: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Tinley Park, with average daytime highs around 28°C. January is the coolest, when nights typically fall to about -8°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 36°C, so the seasons feel very different from each other.
The area receives about 980 mm of rain in a typical year. Most of it falls from May to August, and May is the wettest month at roughly 112 mm.
For outdoor plans and travel, September usually offers the most comfortable weather in Tinley Park, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 0° | -8° | 51 mm | 86% |
| Feb | 1° | -7° | 53 mm | 84% |
| Mar | 8° | -2° | 62 mm | 80% |
| Apr | 15° | 4° | 94 mm | 77% |
| May | 21° | 10° | 112 mm | 77% |
| Jun | 26° | 16° | 106 mm | 77% |
| Jul | 28° | 19° | 101 mm | 74% |
| Aug | 28° | 18° | 106 mm | 73% |
| Sep | 24° | 14° | 81 mm | 73% |
| Oct | 17° | 7° | 93 mm | 75% |
| Nov | 9° | 0° | 61 mm | 80% |
| Dec | 2° | -5° | 57 mm | 86% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Tinley Park. Values describe typical conditions, not a forecast.
About Tinley Park weather
Tinley Park is one of many towns in Illinois's humid continental climate, shaped by its Great Lakes and prairie geography, about 36 km south of Chicago. Before the rains arrive, there's warm, humid summers (June–August). Cooler months mean cold winters (December–February) with regular snow, colder near Lake Michigan. This page shows live, auto-refreshing weather for Tinley Park: 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
Tinley Park is about 36 km south of Chicago, in Illinois.
Tinley Park sees cold winters (December–February) with regular snow, colder near Lake Michigan.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Tinley Park's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Tinley Park, with average daytime highs of about 28°C and nights around 19°C.
The coldest nights come in January, when the average low is about -8°C and daytime highs reach around 0°C. Frost is possible on clear, calm nights.
Tinley Park receives about 980 mm of rain in a typical year. May is the wettest month at roughly 112 mm, and the main rainy period is May to August.
September usually offers the most comfortable weather in Tinley Park, with mild daytime temperatures and little rain.
In November Tinley Park typically sees daytime highs near 9°C and lows near 0°C, with about 61 mm of rain over the month and average humidity around 80%. 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 Tinley Park is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Tinley Park's day-to-day weather follows the broader pattern of Illinois described above. See the hourly weather forecast or the air quality index for more detail.