December 21 is generally a great time to visit Riga. While there is a slight chance of rain (29%), showers are usually brief. Expect comfortable 1°C weather. Expect a bustling atmosphere in Riga right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Riga
Currency
EUR
€ Euro
Language
Latvian
Driving
Right side
Safety
High Safety
GPI: 1.673
Riga Weather Forecast for December 21
"Cold & Crisp. Expect average highs of 1°C. 29% chance of snow."
What to Wear in Riga in December
Based on historical data for December 21, Riga typically experiences temperatures between -3°C and 1°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. With a 29% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Riga
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
Average High
1°C
Daytime Peak
Average Low
-3°C
Nighttime Low
Feels Like
-4.4°C
🥶 Wind chill effect
Snow Chance
29%
Avg 1.3mm if it snows
Snowfall
0.7 cm
~29% chance
Pressure
1009.9 hPa
High volatility
Riga 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
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
-0.9°C
Dry air
Heat Stress
Low
No heat warning
😣 Best outdoor time:
Midday (11 AM - 3 PM) when warmest
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
❄️ Cold Water Hazard
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Latvia
Flight Traffic
High
100/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~217
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Riga
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
09:01
☀️ Noon
12:22
🌇 Sunset
15:44
⏱️ Daylight
6h 43m
Wind Speed
23.2 km/h
Moderate wind
Sunshine
1.4 hrs
Direct Sun (Cloud-free)
Humidity
87%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Riga
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 Riga
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Rapid pressure changes detected. High risk for meteosensitive people.
Low pressure & humidity may aggravate joints.
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, Riga on December 21 averages 1°C with a 29% precipitation probability. Wedding/Outdoor Event Score: 12/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Riga Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
December 18
1.3°C • 24% rain
Score
15
December 19
1.4°C • 27% rain
Score
15
December 20
1.3°C • 25% rain
Score
15
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (December 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Riga Worth Visiting on December 21?
Planning a trip to Riga on December 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 1°C with a 29% historical precipitation risk.
✈️ Travel Logistics: Approximately 217 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Latvia, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 2.7°C (polar plunge). Wave conditions are generally lake-like with heights around 0m.
📊 Historical Extremes: The hottest December 21 recorded in the last 30 years saw temperatures hit 9.2°C in 2015, while the coldest dropped to -9.4°C in 2021.