30YearWeather
Washington DC in August
Washington DC weather in August - United States
☀️Hot & Sunny

Washington DC Weather in August

Plan your August trip to Washington DC, United States. Based on 30 years of NASA data, expect temperatures of 30°C (high) to 20°C (low), with 29% rain probability and 8 hours of daily sunshine. Pack rain gear for around 23 rainy days.

Avg High
30°C

Hottest around day 1

Avg Low
20°C

Coolest around day 23

Rainy Days
23days

29% avg rain chance

Sunshine
8hrs/day

Summer season

Washington DC August Weather Calendar

Click any day to see detailed weather information

Essential Travel Info for Washington DC

Currency

USD

$ United States dollar

Language

English

Driving

Right side

Connect

The D.C. government operates a network o...

Safety

Moderate Safety

GPI: 2.44

Travel Intelligence

Exclusive flight analytics & health data for Washington DC

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

Well Connected
71/ 100
Traffic Index

Popular destination

Peak Daily Arrivals

0

slots per day

Peak

Jun

Low

Jan

Monthly Traffic Distribution

321
Jan
333
Feb
366
Mar
383
Apr
417
May
470
Jun
453
Jul
457
Aug
447
Sep
421
Oct
362
Nov
397
Dec
Traffic Level
Low Season

Key Connections

Atlanta Hartsfield Jackson (ATL)
Denver (DEN)
Charlotte Douglas (CLT)
San Francisco (SFO)
Teterboro (TEB)

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 Washington DC?

👌Good option with minor considerations
Short Answer

Popular August in Washington DC offers 30°C and 29% rain chance - excellent conditions that attract maximum visitors. Book 3-6 months ahead for best rates.

Decision Factors

Feels significantly hotter than 29.6°C

Heat index: 35°C due to 72% humidity

Peak tourist season

97% of annual peak - expect crowds and peak prices

Plenty of sunshine

10.4h of sunshine daily

Exceptional dining scene

112 Michelin-listed restaurants

Good For

  • 👨‍👩‍👧‍👦
    Families with children

    Comfortable 29.6°C temperatures and low 29% rain risk

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 💰
    Budget travelers

    Peak season means premium prices everywhere

  • 🌡️
    Heat-sensitive visitors

    35°C feels-like temperature creates discomfort

930 observations30-year historical data
Confidence: 95%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Washington DC in August averages 30°C with 29% precipitation probability."

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

Frequently Asked Questions: Washington DC in August

What are the temperatures in Washington DC in August?

Daytime highs average 30°C, nights drop to 20°C. Temperatures remain fairly consistent.

How many rainy days in Washington DC in August?

Expect around 23 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in Washington DC in August?

Light, breathable fabrics. Don't forget sunglasses and a hat.

Is August peak season in Washington DC?

This is shoulder season—moderate prices and manageable crowds.