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Chicago, Illinois weather · now

70°

Light Rain and Fog/Mist

High / Low
82° / 71°
Wind
33 mph WNW
Humidity
88%
Currently precipitating; clearing around 1:15 PM (94 min).

Precipitation · next 12 hrs

Peak 93% · 11 AM

11 AM
·
·
2 PM
·
·
5 PM
·
·
8 PM
·
10 PM
ModerateAir quality PollenTreeNoneGrassModerateWeedModerate
Sun 5:54 AM 7:56 PM 14h 2m
Moon Waning Crescent 3% lit

Current weather and 7-day forecast for Chicago, Illinois, sourced directly from the National Weather Service. Expect showers and thunderstorms today. Today's high is 82° with a low near 71°. 2 active weather alerts in effect.

What to wear today

Rain jacket and umbrella

Plan for showers (93%). Skip cotton or anything that dries slow.

Next 24 hours

65° 75° 85° ↑ 80° ↓ 71° 11 AM 2 PM 5 PM 8 PM 11 PM 2 AM 5 AM 8 AM

  1. 11 AM

    77°

    93%

  2. 1 PM

    78°

    75%

  3. 3 PM

    78°

    55%

  4. 5 PM

    78°

    41%

  5. 7 PM

    78°

    33%

  6. 9 PM

    74°

    40%

  7. 11 PM

    73°

    28%

  8. 1 AM

    72°

    42%

  9. 3 AM

    71°

    38%

  10. 5 AM

    71°

    16%

  11. 7 AM

    72°

    20%

  12. 9 AM

    74°

    29%

Live radar

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7 days

  1. Today 8/11 Showers And Thunderstorms 93% 82° · 71°
    1. 11 AM 77° Showers And Thunderstorms 93%
    2. 12 PM 77° Showers And Thunderstorms 93%
    3. 1 PM 78° Showers And Thunderstorms 75%
    4. 2 PM 77° Showers And Thunderstorms Likely 69%
    5. 3 PM 78° Showers And Thunderstorms Likely 55%
    6. 4 PM 80° Chance Showers And Thunderstorms 52%
    7. 5 PM 78° Chance Showers And Thunderstorms 41%
    8. 6 PM 78° Chance Showers And Thunderstorms 32%
    9. 7 PM 78° Chance Showers And Thunderstorms 33%
    10. 8 PM 75° Chance Showers And Thunderstorms 38%
    11. 9 PM 74° Chance Showers And Thunderstorms 40%
    12. 10 PM 74° Chance Showers And Thunderstorms 34%
    13. 11 PM 73° Chance Showers And Thunderstorms 28%
  2. Wed 8/12 Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms 45% 81° · 71°
    1. 12 AM 73° Slight Chance Showers And Thunderstorms 16%
    2. 1 AM 72° Chance Showers And Thunderstorms 42%
    3. 2 AM 72° Chance Showers And Thunderstorms 42%
    4. 3 AM 71° Chance Showers And Thunderstorms 38%
    5. 4 AM 71° Slight Chance Rain Showers 18%
    6. 5 AM 71° Slight Chance Rain Showers 16%
    7. 6 AM 71° Mostly Cloudy 11%
    8. 7 AM 72° Slight Chance Showers And Thunderstorms 20%
    9. 8 AM 73° Chance Showers And Thunderstorms 28%
    10. 9 AM 74° Chance Showers And Thunderstorms 29%
    11. 10 AM 76° Slight Chance Showers And Thunderstorms 22%
    12. 11 AM 77° Chance Showers And Thunderstorms 45%
    13. 12 PM 78° Chance Showers And Thunderstorms 44%
    14. 1 PM 78° Chance Showers And Thunderstorms 37%
    15. 2 PM 78° Chance Showers And Thunderstorms 37%
    16. 3 PM 79° Chance Showers And Thunderstorms 38%
    17. 4 PM 78° Chance Showers And Thunderstorms 39%
    18. 5 PM 78° Partly Sunny 13%
    19. 6 PM 78° Mostly Cloudy 13%
    20. 7 PM 76° Slight Chance Rain Showers 22%
    21. 8 PM 75° Slight Chance Rain Showers 22%
    22. 9 PM 74° Mostly Cloudy 5%
    23. 10 PM 74° Mostly Cloudy
    24. 11 PM 73° Mostly Cloudy 1%
  3. Thu 8/13 Rain Showers Likely 64% 79° · 70°
    1. 12 AM 73° Mostly Cloudy 5%
    2. 1 AM 72° Slight Chance Rain Showers 19%
    3. 2 AM 72° Cloudy 9%
    4. 3 AM 72° Chance Rain Showers 34%
    5. 4 AM 71° Chance Rain Showers 43%
    6. 5 AM 71° Chance Rain Showers 25%
    7. 6 AM 71° Chance Rain Showers 42%
    8. 7 AM 72° Rain Showers Likely 59%
    9. 8 AM 73° Rain Showers Likely 59%
    10. 9 AM 75° Rain Showers Likely 59%
    11. 10 AM 76° Rain Showers Likely 59%
    12. 11 AM 77° Rain Showers Likely 59%
    13. 12 PM 77° Rain Showers Likely 59%
    14. 1 PM 77° Showers And Thunderstorms Likely 64%
    15. 2 PM 77° Showers And Thunderstorms Likely 64%
    16. 3 PM 76° Showers And Thunderstorms Likely 64%
    17. 4 PM 75° Showers And Thunderstorms Likely 64%
    18. 5 PM 75° Showers And Thunderstorms Likely 64%
    19. 6 PM 75° Showers And Thunderstorms Likely 64%
    20. 7 PM 74° Chance Showers And Thunderstorms 44%
    21. 8 PM 74° Chance Showers And Thunderstorms 44%
    22. 9 PM 73° Chance Showers And Thunderstorms 44%
    23. 10 PM 72° Chance Rain Showers 44%
    24. 11 PM 72° Chance Rain Showers 44%
  4. Fri 8/14 Slight Chance Rain Showers 51% 77° · 68°
    1. 12 AM 72° Chance Rain Showers 44%
    2. 1 AM 71° Slight Chance Rain Showers 18%
    3. 2 AM 71° Slight Chance Rain Showers 18%
    4. 3 AM 70° Slight Chance Rain Showers 18%
    5. 4 AM 70° Slight Chance Rain Showers 18%
    6. 5 AM 70° Slight Chance Rain Showers 18%
    7. 6 AM 70° Slight Chance Rain Showers 18%
    8. 7 AM 71° Slight Chance Rain Showers 15%
    9. 8 AM 72° Slight Chance Rain Showers 15%
    10. 9 AM 73° Slight Chance Rain Showers 15%
    11. 10 AM 74° Slight Chance Rain Showers 15%
    12. 11 AM 74° Slight Chance Rain Showers 15%
    13. 12 PM 75° Slight Chance Rain Showers 15%
    14. 1 PM 75° Partly Sunny 5%
    15. 2 PM 75° Partly Sunny 5%
    16. 3 PM 74° Partly Sunny 5%
    17. 4 PM 74° Mostly Sunny 5%
    18. 5 PM 74° Mostly Sunny 5%
    19. 6 PM 74° Partly Cloudy 5%
    20. 7 PM 74° Slight Chance Showers And Thunderstorms 17%
    21. 8 PM 73° Slight Chance Showers And Thunderstorms 17%
    22. 9 PM 72° Slight Chance Showers And Thunderstorms 17%
    23. 10 PM 72° Slight Chance Showers And Thunderstorms 17%
    24. 11 PM 71° Slight Chance Showers And Thunderstorms 17%
  5. Sat 8/15 Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 57% 82° · 72°
    1. 12 AM 71° Slight Chance Showers And Thunderstorms 17%
    2. 1 AM 71° Chance Showers And Thunderstorms 51%
    3. 2 AM 70° Chance Showers And Thunderstorms 51%
    4. 3 AM 69° Chance Showers And Thunderstorms 51%
    5. 4 AM 69° Chance Showers And Thunderstorms 51%
    6. 5 AM 69° Chance Showers And Thunderstorms 51%
    7. 6 AM 69° Chance Showers And Thunderstorms 51%
    8. 7 AM 69° Showers And Thunderstorms Likely 57%
    9. 8 AM 70° Showers And Thunderstorms Likely 57%
    10. 9 AM 71° Showers And Thunderstorms Likely 57%
    11. 10 AM 73° Showers And Thunderstorms Likely 57%
    12. 11 AM 74° Showers And Thunderstorms Likely 57%
    13. 12 PM 75° Showers And Thunderstorms Likely 57%
    14. 1 PM 76° Slight Chance Showers And Thunderstorms 20%
    15. 2 PM 77° Slight Chance Showers And Thunderstorms 20%
    16. 3 PM 78° Slight Chance Showers And Thunderstorms 20%
    17. 4 PM 79° Slight Chance Showers And Thunderstorms 20%
    18. 5 PM 80° Slight Chance Showers And Thunderstorms 20%
    19. 6 PM 80° Slight Chance Showers And Thunderstorms 20%
    20. 7 PM 81° Chance Showers And Thunderstorms 34%
    21. 8 PM 79° Chance Showers And Thunderstorms 34%
    22. 9 PM 77° Chance Showers And Thunderstorms 34%
    23. 10 PM 76° Chance Showers And Thunderstorms 34%
    24. 11 PM 75° Chance Showers And Thunderstorms 34%
  6. Sun 8/16 Chance Showers And Thunderstorms 52% 83° · 69°
    1. 12 AM 74° Chance Showers And Thunderstorms 34%
    2. 1 AM 74° Chance Showers And Thunderstorms 52%
    3. 2 AM 73° Chance Showers And Thunderstorms 52%
    4. 3 AM 73° Chance Showers And Thunderstorms 52%
    5. 4 AM 72° Chance Showers And Thunderstorms 52%
    6. 5 AM 72° Chance Showers And Thunderstorms 52%
    7. 6 AM 72° Chance Showers And Thunderstorms 52%
    8. 7 AM 73° Chance Showers And Thunderstorms 34%
    9. 8 AM 74° Chance Showers And Thunderstorms 34%
    10. 9 AM 76° Chance Showers And Thunderstorms 34%
    11. 10 AM 78° Chance Showers And Thunderstorms 34%
    12. 11 AM 79° Chance Showers And Thunderstorms 34%
    13. 12 PM 81° Chance Showers And Thunderstorms 34%
    14. 1 PM 81° Chance Showers And Thunderstorms 35%
    15. 2 PM 81° Chance Showers And Thunderstorms 35%
    16. 3 PM 81° Chance Showers And Thunderstorms 35%
    17. 4 PM 80° Chance Showers And Thunderstorms 35%
    18. 5 PM 79° Chance Showers And Thunderstorms 35%
    19. 6 PM 78° Chance Showers And Thunderstorms 35%
    20. 7 PM 77° Slight Chance Rain Showers 23%
    21. 8 PM 76° Slight Chance Rain Showers 23%
    22. 9 PM 75° Slight Chance Rain Showers 23%
    23. 10 PM 74° Slight Chance Rain Showers 23%
    24. 11 PM 73° Slight Chance Rain Showers 23%
  7. Mon 8/17 Mostly Sunny 8% 76° · 66°
    1. 12 AM 72° Slight Chance Rain Showers 23%
    2. 1 AM 71° Partly Cloudy 8%
    3. 2 AM 70° Partly Cloudy 8%
    4. 3 AM 70° Partly Cloudy 8%
    5. 4 AM 69° Partly Cloudy 8%
    6. 5 AM 69° Partly Cloudy 8%
    7. 6 AM 69° Mostly Sunny 8%
    8. 7 AM 70° Mostly Sunny 3%
    9. 8 AM 71° Mostly Sunny 3%
    10. 9 AM 72° Partly Sunny 3%
    11. 10 AM 74° Partly Sunny 3%
    12. 11 AM 75° Partly Sunny 3%
    13. 12 PM 75° Partly Sunny 3%
    14. 1 PM 75° Partly Sunny 5%
    15. 2 PM 75° Partly Sunny 5%
    16. 3 PM 74° Mostly Sunny 5%
    17. 4 PM 73° Mostly Sunny 5%
    18. 5 PM 73° Mostly Sunny 5%
    19. 6 PM 73° Partly Cloudy 5%
    20. 7 PM 72° Partly Cloudy 3%
    21. 8 PM 72° Partly Cloudy 3%
    22. 9 PM 70° Partly Cloudy 3%
    23. 10 PM 70° Partly Cloudy 3%
Extended outlook days 8–16
  1. Tue 8/18 Cloudy 8% 81° · 62°
  2. Wed 8/19 Drizzle 14% 78° · 65°
  3. Thu 8/20 Cloudy 18% 83° · 68°
  4. Fri 8/21 Rain Showers 15% 91° · 70°
  5. Sat 8/22 Rain Showers 16% 69° · 65°
  6. Sun 8/23 Partly Cloudy 13% 65° · 61°
  7. Mon 8/24 Cloudy 21% 66° · 60°
  8. Tue 8/25 Cloudy 29% 74° · 55°
  9. Wed 8/26 Cloudy 26% 79° · 60°

Days 8+ from the Open-Meteo multi-model ensemble — treat as a guide; accuracy drops past day 7.

Best day this week

Mild temps, low rain chance, clearer skies.

Monday, 8/17

Mostly Sunny, 76° / 66°

  1. Tomorrow81°71°
  2. Thu79°70°
  3. Fri77°68°
  4. Sat82°72°
  5. Sun83°69°
  6. Mon76°66°

Best time to head outside

Picks the upcoming daytime hour with the most favorable conditions for each activity. Factors in temperature, wind, precipitation timing, and pollen.

  • RunTomorrow 6 AM

    warm at 69°F · light wind (10 mph) · no rain expected · rain should clear by 6 AM · pollen moderate today

    Excellent92 / 100
  • BikeTomorrow 6 AM

    comfortable at 71°F · calm wind · slight chance of rain (11%) · rain should clear by 6 AM · pollen moderate today

    Excellent100 / 100
  • GolfTomorrow 6 AM

    comfortable at 71°F · calm wind · slight chance of rain (11%) · rain should clear by 6 AM · pollen moderate today

    Excellent100 / 100
  • PicnicTomorrow 6 AM

    comfortable at 71°F · calm wind · slight chance of rain (11%) · rain should clear by 6 AM · pollen moderate today

    Excellent100 / 100
  • Magic ShowAnytime

    Any weather is magic show weather. Indoors or out, magic doesn't care.

    Corporate Magician Scott Henderson

How well did we do?

Average miss by lead time.

Each morning we save the day's predicted high/low. As later days arrive, we grade what we said against what the station actually recorded.

Same day
±8°
2 days graded
1 day out
±7°
2 days graded
3 days out
±5°
2 days graded
7 days out
±7°
2 days graded
Day-by-day, 1 day out7 days
  1. Yesterday±7°
    High81°88°-7°
    Low71°73°-2°
  2. Sun, Aug 9±7°
    High86°86°0°
    Low73°66°+7°
  3. Sat, Aug 8pending
    High78°——
    Low68°——
  4. Fri, Aug 7pending
    High82°——
    Low71°——
  5. Thu, Aug 6pending
    High74°——
    Low67°——
  6. Wed, Aug 5pending
    High80°——
    Low68°——
  7. Tue, Aug 4pending
    High84°——
    Low69°——

Climate normals

What weather to expect in Chicago

Chicago in August typically averages 80° highs and 66° lows, with about 12 days of rain. The hottest stretch is July (average high 82°); the coldest is January (average low 16°). July is the wettest month on average.

MonthAvg highAvg lowRainy days
Jan29°16°13
Feb36°23°11
Mar52°34°16
Apr59°43°18
May65°50°14
Jun78°63°17
Jul82°69°19
Aug80°66°12
Sep76°61°8
Oct66°51°7
Nov50°39°13
Dec35°24°15

Normals derived from the past two years of observations via Open-Meteo's historical archive.

More for Chicago

Other cities in Illinois

Detailed forecast (NWS)

Today
Showers and thunderstorms before 4pm, then a chance of showers and thunderstorms. Some of the storms could be severe and produce heavy rain. Mostly cloudy. High near 82, with temperatures falling to around 78 in the afternoon. East southeast wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
A slight chance of showers and thunderstorms between 7am and 8am, then a chance of showers and thunderstorms between 8am and 10am, then a slight chance of showers and thunderstorms between 10am and 11am, then a chance of showers and thunderstorms between 11am and 5pm. Partly sunny. High near 81, with temperatures falling to around 78 in the afternoon. East southeast wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
Thursday
Rain showers likely before 1pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 79. East wind 5 to 10 mph. Chance of precipitation is 60%.
Friday
A slight chance of rain showers before 1pm. Partly sunny, with a high near 77.

Forecast details

NWS gridpoint
LOT 76,73
Radar station
KLOT
Time zone
America/Chicago
Coordinates
41.878, -87.630