May 21 is generally a great time to visit Montevideo. While there is a slight chance of rain (20%), showers are usually brief. Expect comfortable 16°C weather. Montevideo is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Montevideo
Currency
UYU
$ Uruguayan peso
Language
Spanish
Driving
Right side
Safety
High Safety
GPI: 1.795
Montevideo Weather Forecast for May 21
"Mild & Comfortable. Expect average highs of 16.3°C. 20% chance of rain."
What to Wear in Montevideo in May
Based on historical data for May 21, Montevideo typically experiences temperatures between 12.1°C and 16.3°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (20% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Montevideo
Smart Suitcase
- Light Jacket
- Long Pants
Average High
16.3°C
Daytime Peak
Average Low
12.1°C
Nighttime Low
Feels Like
16.3°C
🌤️ Feels accurate
Rain Chance
20%
Avg 1.6mm if it rains
Cloud Cover
62%
Overcast
Pressure
1017.9 hPa
Medium volatility
Montevideo Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 88% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 200 min to burn
Type III-IV
🟡 300 min to burn
Type V-VI
🟢 500 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
12.6°C
Pleasant
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
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 Uruguay
Flight Traffic
High
96/100 pressure index
Health Advisory
Recommended
1 vaccine • View Details →
Landing Slots
~25
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Montevideo
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:37
☀️ Noon
12:42
🌇 Sunset
17:47
⏱️ Daylight
10h 10m
Wind Speed
19.3 km/h
Gentle breeze
Sunshine
6.6 hrs
Direct Sun (Cloud-free)
Humidity
79%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Montevideo
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
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Travel Health & Safety in Montevideo
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
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, Montevideo on May 21 averages 16.3°C with a 20% precipitation probability. Wedding/Outdoor Event Score: 89/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Montevideo Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
May 14
17.3°C • 14% rain
Score
98
May 27
15.6°C • 15% rain
Score
95
May 28
15.4°C • 14% rain
Score
95
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (May 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Montevideo Worth Visiting on May 21?
Planning a trip to Montevideo on May 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 16.3°C with a 20% historical precipitation risk.
✈️ Travel Logistics: Approximately 25 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Uruguay, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 15.6°C (polar plunge). Wave conditions are generally fun waves with heights around 0.52m.
📊 Historical Extremes: The hottest May 21 recorded in the last 30 years saw temperatures hit 20°C in 2023, while the coldest dropped to 9.1°C in 2024.