7-day weather forecast for Chicago
7-day weather forecast for Chicago: 9°C, Clear sky, Humidity 72%, Wind 9 km/h.
Chicago sits at 41.9° north latitude, in the temperate zone, 241 m above sea level, in the America/Chicago time zone. Over the week ahead highs range from 13° to 21° and lows from 3° to 14°, averaging 13°.
No significant rain is expected over the seven days. Today the sun rises at 07:05 and sets at 18:05: 11:00 of daylight.
| Conditions | high | low | rain | Wind | UV index | |
|---|---|---|---|---|---|---|
| Today | Overcast | 13° | 3° | 2% | 22 km/h | 4 |
| Tomorrow | Clear sky | 16° | 3° | 0% | 20 km/h | 4 |
| Mon, Oct 19 | Overcast | 19° | 4° | 0% | 11 km/h | 4 |
| Tue, Oct 20 | Overcast | 17° | 12° | 0% | 11 km/h | 4 |
| Wed, Oct 21 | Clear sky | 20° | 12° | 0% | 8 km/h | 4 |
| Thu, Oct 22 | Light drizzle | 20° | 14° | 1% | 7 km/h | 4 |
| Fri, Oct 23 | Overcast | 21° | 14° | 0% | 12 km/h | 4 |
Weather data by Open-Meteo (ECMWF, GFS, ICON models and national weather services). Updated every 15 minutes.
Weather in Chicago month by month
The table gathers the 2016-2025 climate normals for Chicago: average highs and lows, total rainfall and number of rainy days for each month of the year.
Chicago has an annual mean temperature of 10.6°. The warmest month is July, when highs sit around 27.1°; the coldest is January, with average lows of -6.7°. The 33.8° gap between those two ends of the calendar is the measure of how much the year swings here.
Rainfall totals about 1,145 mm a year, spread over roughly 132 rainy days. The wettest month is July, averaging 149.7 mm across 13 days; the driest is February, with 58.6 mm.
| Month | Average high | Average low | Rainfall | Rainy days |
|---|---|---|---|---|
| January | 0.1° | -6.7° | 65.9 mm | 10 |
| February | 2.6° | -5.8° | 58.6 mm | 9 |
| March | 7.8° | -0.2° | 94.4 mm | 12 |
| April | 12.7° | 4.1° | 99.1 mm | 14 |
| May | 18.7° | 10.1° | 125.4 mm | 12 |
| June | 25.5° | 16.6° | 111.3 mm | 11 |
| July | 27.1° | 19.5° | 149.7 mm | 13 |
| August | 26.6° | 19.1° | 104.9 mm | 12 |
| September | 23.8° | 16.3° | 91.9 mm | 10 |
| October | 16.8° | 9.3° | 123.5 mm | 12 |
| November | 8.8° | 1.8° | 60.1 mm | 8 |
| December | 3.3° | -3.4° | 59.9 mm | 9 |
When to visit Chicago
For travellers who plan around the weather, September tend to be the most comfortable stretch: average highs between 23.8° and 23.8° and rainfall below the yearly average.
What to expect each month
- In January, highs sit near 0.1° and lows near -6.7°, with about 65.9 mm of rain over 10 days.
- In February, highs sit near 2.6° and lows near -5.8°, with about 58.6 mm of rain over 9 days.
- In March, highs sit near 7.8° and lows near -0.2°, with about 94.4 mm of rain over 12 days.
- In April, highs sit near 12.7° and lows near 4.1°, with about 99.1 mm of rain over 14 days.
- In May, highs sit near 18.7° and lows near 10.1°, with about 125.4 mm of rain over 12 days.
- In June, highs sit near 25.5° and lows near 16.6°, with about 111.3 mm of rain over 11 days.
- In July, highs sit near 27.1° and lows near 19.5°, with about 149.7 mm of rain over 13 days.
- In August, highs sit near 26.6° and lows near 19.1°, with about 104.9 mm of rain over 12 days.
- In September, highs sit near 23.8° and lows near 16.3°, with about 91.9 mm of rain over 10 days.
- In October, highs sit near 16.8° and lows near 9.3°, with about 123.5 mm of rain over 12 days.
- In November, highs sit near 8.8° and lows near 1.8°, with about 60.1 mm of rain over 8 days.
- In December, highs sit near 3.3° and lows near -3.4°, with about 59.9 mm of rain over 9 days.
Recorded extremes
Across 2016-2025, the thermometer reached 37.4° at the top of the series and fell to -32.5° at the bottom. These are observed values, not averages: they show what the city has actually faced.
Normals computed from the ERA5 reanalysis (Copernicus/ECMWF), 2016-2025 series.
FAQ
What is the temperature in Chicago right now?
It is 9°C in Chicago right now, with clear sky. It feels like 6°C.
Will it rain in Chicago today?
The peak chance of rain today is 2%, with about 0 mm expected.
What will the weather be tomorrow in Chicago?
Tomorrow the high is 16° and the low 3°, with clear sky.
Where does the data come from and how often is it updated?
Data comes from the ECMWF, GFS and ICON models and national weather services via Open-Meteo, updated every 15 minutes.
What is the warmest month in Chicago?
The warmest month is July, with average highs of 27.1° and lows of 19.5°.
Does it rain a lot in Chicago?
The city gets about 1,145 mm a year over 132 rainy days. The wettest month is July, with 149.7 mm.
When is the best time to visit Chicago?
On weather grounds, September combine the most agreeable temperatures with below-average rainfall.