30YearWeather
Chicago in August
Chicago weather in August - United States
😊Warm & Pleasant

Chicago Weather in August

Plan your August trip to Chicago, United States. Based on 30 years of NASA data, expect temperatures of 26°C (high) to 20°C (low), with 25% rain probability and 8 hours of daily sunshine. Pack rain gear for around 18 rainy days.

Avg High
26°C

Hottest around day 9

Avg Low
20°C

Coolest around day 31

Rainy Days
18days

25% avg rain chance

Sunshine
8hrs/day

Summer season

Chicago August Weather Calendar

Click any day to see detailed weather information

Currency

USD

$ United States dollar

Language

English

Driving

Right side

Connect

The first Internet café in the United St...

Safety

Moderate Safety

GPI: 2.44

Travel Intelligence

Exclusive flight analytics & health data for Chicago

Smart Flight Estimator

Airport-to-Airport Logistics

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Add your home location in settings to see airport details.

Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Major Hub
100/ 100
Traffic Index

Extremely busy airport

Peak Daily Arrivals

0

slots per day

Peak

Jun

Low

Jan

Monthly Traffic Distribution

1055
Jan
1174
Feb
1315
Mar
1276
Apr
1351
May
1367
Jun
1256
Jul
1331
Aug
1314
Sep
1222
Oct
1139
Nov
1185
Dec
Traffic Level
Low Season

Key Connections

New York La Guardia (LGA)
Dallas-Fort Worth (DFW)
Boston General Edward Lawrence Logan (BOS)
Washington Ronald Reagan National (DCA)
Newark Liberty (EWR)

Health & Safety Advisory

CDC travel health recommendations

No Requirements

No Special Vaccinations Required

Standard travel precautions apply

Source: CDC Travelers' Health

View Complete Health Guide

Is August a Good Time to Visit Chicago?

👍Recommended for planning your trip
Short Answer

August is Chicago's peak season for good reason: 26°C temperatures and 25% rain probability. But expect crowds (97% of annual maximum) and premium prices.

Decision Factors

Peak tourist season

97% of annual peak - expect crowds and peak prices

Ideal temperature range

26°C - perfect for sightseeing and outdoor activities

Plenty of sunshine

11h of sunshine daily

Exceptional dining scene

105 Michelin-listed restaurants

Good For

  • 👨‍👩‍👧‍👦
    Families with children

    Comfortable 26°C temperatures and low 25% rain risk

  • 👴
    Elderly travelers

    Comfortable 26°C temperature range with manageable humidity

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

  • 🌡️
    Heat-sensitive visitors

    Manageable 26°C without oppressive humidity

Who Should Avoid

  • 💰
    Budget travelers

    Peak season means premium prices everywhere

930 observations30-year historical data
Confidence: 95%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Chicago in August averages 26°C with 25% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Chicago in August

What are the temperatures in Chicago in August?

Daytime highs average 26°C, nights drop to 20°C. Temperatures remain fairly consistent.

How many rainy days in Chicago in August?

Expect around 18 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Chicago in August?

Comfortable casual wear with a light jacket for evenings.

Is August peak season in Chicago?

This is shoulder season—moderate prices and manageable crowds.