September 8 is generally a great time to visit Washington DC. While there is a slight chance of rain (28%), showers are usually brief. Expect comfortable 27°C weather. As it's peak season for Washington DC, we recommend booking your stay well in advance to secure the best rates.
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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
Washington DC Weather Forecast for September 8
"Warm & Sunny. Expect average highs of 27.2°C. 28% chance of rain."
What to Wear in Washington DC in September
Based on historical data for September 8, Washington DC typically experiences temperatures between 17.7°C and 27.2°C. We recommend packing t-shirt, light clothing to stay comfortable. With a 28% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Washington DC
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
27.2°C
Daytime Peak
Average Low
17.7°C
Nighttime Low
Feels Like
29.4°C
🔥 Feels warmer
Rain Chance
28%
Avg 2.6mm if it rains
Cloud Cover
50%
Overcast
Pressure
1017.2 hPa
Medium volatility
Washington DC Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ This date historically delivers consistent weather 77% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 18:00
Type I-II
🔴 27 min to burn
Type III-IV
🟡 41 min to burn
Type V-VI
🟢 68 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
21.7°C
Humid/Sticky
Heat Index
29.4°C
Feels hotter
😐 Best outdoor time:
Morning hours (before 11 AM)
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in United States
Flight Traffic
High
95/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~447
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Washington DC
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:44
☀️ Noon
12:07
🌇 Sunset
18:30
⏱️ Daylight
12h 45m
Wind Speed
13 km/h
Gentle breeze
Sunshine
9.4 hrs
Direct Sun (Cloud-free)
Humidity
72%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Washington DC
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Washington DC
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Washington DC on September 8 averages 27.2°C with a 28% precipitation probability. Wedding/Outdoor Event Score: 96/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Washington DC Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
September 14
26.6°C • 21% rain
Score
98
September 15
26.1°C • 20% rain
Score
98
September 7
27.7°C • 26% rain
Score
97
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 8) in other destinations
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📍 Is Washington DC Worth Visiting on September 8?
Planning a trip to Washington DC on September 8? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 27.2°C with a 28% historical precipitation risk.
✈️ Travel Logistics: Approximately 447 landing slots available daily during this period, indicating peak tourist activity.
📊 Historical Extremes: The hottest September 8 recorded in the last 30 years saw temperatures hit 34.6°C in 2016, while the coldest dropped to 10.9°C in 2024.