March 21 is generally a great time to visit Washington DC. While there is a slight chance of rain (21%), showers are usually brief. Expect comfortable 13°C weather. It's a lively time to explore Washington DC, with most attractions operating at full capacity.
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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 March 21
"Mild & Comfortable. Expect average highs of 13.1°C. 21% chance of snow."
What to Wear in Washington DC in March
Based on historical data for March 21, Washington DC typically experiences temperatures between 2.5°C and 13.1°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. Trends suggest it will stay mostly dry (21% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Washington DC
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
Average High
13.1°C
Daytime Peak
Average Low
2.5°C
Nighttime Low
Feels Like
12.4°C
🌤️ Feels accurate
Snow Chance
21%
Avg 1.8mm if it snows
Snowfall
0.2 cm
~21% chance
Pressure
1018.2 hPa
High volatility
Washington DC Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
~ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 29 min to burn
Type III-IV
🟡 44 min to burn
Type V-VI
🟢 73 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
6°C
Dry air
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in United States
Flight Traffic
Busy
78/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~366
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Washington DC
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:11
☀️ Noon
12:16
🌇 Sunset
18:21
⏱️ Daylight
12h 10m
Wind Speed
18.5 km/h
Gentle breeze
Sunshine
8.5 hrs
Direct Sun (Cloud-free)
Humidity
62%
Slightly humid
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
☀️ Excellent
Tourist Crowds
🟢 Moderate
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Rapid pressure changes detected. High risk for meteosensitive people.
Weather unlikely to affect joint pain.
Fish are active due to pressure changes.
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 March 21 averages 13.1°C with a 21% precipitation probability. Wedding/Outdoor Event Score: 78/100."
— 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
March 27
14.8°C • 21% rain
Score
88
March 26
14.2°C • 23% rain
Score
85
March 25
13.8°C • 20% rain
Score
83
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (March 21) in other destinations
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📍 Is Washington DC Worth Visiting on March 21?
Planning a trip to Washington DC on March 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 13.1°C with a 21% historical precipitation risk.
✈️ Travel Logistics: Approximately 366 landing slots available daily during this period, indicating peak tourist activity.
📊 Historical Extremes: The hottest March 21 recorded in the last 30 years saw temperatures hit 19.6°C in 2022, while the coldest dropped to -2.5°C in 2023.