Champaign, Illinois Weather
Champaign weather this week
Over the next 7 days in Champaign, daytime highs range from 8°C to 18°C and night-time lows from -4°C to 8°C. The warmest afternoon is likely on Friday at 18°C, while the coolest night is expected on Monday night at -4°C. Temperatures trend warmer through the week, rising by about 8°C.
No significant rain is expected in Champaign this week. The highest rain chance is just 3%, on Thursday. Fog may reduce visibility in the mornings Monday, so drive with low-beam lights and extra caution.
Winds stay mostly light this week, peaking at about 30 km/h on Thursday. UV levels stay moderate or lower, peaking at 3. Average humidity is a comfortable 60% or so.
| Day | Conditions | High / Low | Rain chance | Rain | Max wind |
|---|---|---|---|---|---|
| Today (Saturday) | Mainly clear | 8° / -2° | 0% | 0.0 mm | 16 km/h |
| Tomorrow (Sunday) | Overcast | 10° / -4° | 0% | 0.0 mm | 9 km/h |
| Monday | Fog | 10° / -4° | 0% | 0.0 mm | 12 km/h |
| Tuesday | Overcast | 14° / 3° | 0% | 0.0 mm | 16 km/h |
| Wednesday | Overcast | 16° / 4° | 0% | 0.0 mm | 29 km/h |
| Thursday | Overcast | 18° / 8° | 3% | 0.0 mm | 30 km/h |
| Friday | Overcast | 18° / 7° | 3% | 0.0 mm | 16 km/h |
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Today's outlook for Champaign
At 23:00 local time it is -1°C in Champaign under clear skies, feeling like -4°C. Today's forecast high is 8°C and the low is -2°C, and the day overall looks mostly sunny. Rain is unlikely today (0% chance). Winds are blowing at about 7 km/h from the north-west. Humidity is 80%.
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Climate of Champaign: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Champaign, with average daytime highs around 29°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 37°C, so the seasons feel very different from each other.
The area receives about 1030 mm of rain in a typical year. Most of it falls from April to July, and June is the wettest month at roughly 119 mm.
For outdoor plans and travel, August to October usually offer the most comfortable weather in Champaign, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 1° | -8° | 59 mm | 84% |
| Feb | 4° | -6° | 57 mm | 82% |
| Mar | 11° | -1° | 73 mm | 79% |
| Apr | 18° | 5° | 103 mm | 75% |
| May | 23° | 12° | 114 mm | 77% |
| Jun | 28° | 17° | 119 mm | 77% |
| Jul | 29° | 19° | 106 mm | 76% |
| Aug | 29° | 18° | 83 mm | 72% |
| Sep | 26° | 14° | 78 mm | 71% |
| Oct | 18° | 6° | 93 mm | 72% |
| Nov | 11° | 0° | 74 mm | 78% |
| Dec | 4° | -5° | 70 mm | 84% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Champaign. Values describe typical conditions, not a forecast.
About Champaign weather
Champaign is a place in Illinois's humid continental climate, shaped by its Great Lakes and prairie geography, located about 126 km east of Springfield. Champaign gets warm, humid summers (June–August) each year. Champaign closes out the year with cold winters (December–February) with regular snow, colder near Lake Michigan. This page shows live, auto-refreshing weather for Champaign: 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
Champaign is about 126 km east of Springfield, in Illinois.
Champaign 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 Champaign's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Champaign, with average daytime highs of about 29°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 1°C. Frost is possible on clear, calm nights.
Champaign receives about 1030 mm of rain in a typical year. June is the wettest month at roughly 119 mm, and the main rainy period is April to July.
August to October usually offer the most comfortable weather in Champaign, with mild daytime temperatures and little rain.
In November Champaign typically sees daytime highs near 11°C and lows near 0°C, with about 74 mm of rain over the month and average humidity around 78%. 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.
The current temperature for Champaign updates automatically at the top of this page — scroll to the hourly strip below to see how it's expected to change over the day.
Champaign'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.