San Juan · SpringMonth summary
San Juan weather in May
✅ Good
🌡️ Temperature min / max
24°C – 30°C
🌧 Rainy days
59% of days
☀️ Sunshine
12.6h per day on average
🌊 🌊 Season
Spring
⭐ ⭐ Weather score
7.5/10
📅 📅 Best month
January (8.0/10)
Quick decision
Should you visit San Juan in May?
✅ Good
✅ Yes if: you're willing to accept showers in exchange for lower prices and fewer tourists.
❌ No if: you're planning 100% outdoor activities — rain is frequent.
Our take: May is a good time to visit San Juan. January remains slightly better (+0.5 pts).
By trip type
San Juan in May by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ✅ Good
- 🏖️ Beach / swimming : ✅ Good
- 💰 💰 Budget : 🌿 Shoulder
Local context
What to expect in May
🎯 Open terraces and outdoor markets — best season for al fresco dining Spring marks the start of the good season in San Juan. Temperatures rise (30°C) and tourists have not yet arrived en masse. With 59% of rainy days, always have indoor alternatives planned. A good balance between weather and crowds, even if January (8.0/10) remains theoretically better.
Browse by month
All months for San Juan
Annual table
Month-by-month comparison
| Month | Min °C | Max °C | Rain % | Precip mm | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌤️ January | 22°C | 28°C | 47% | 1.8 | 10.9h | 8.0/10 |
| 🌤️ February | 22°C | 28°C | 55% | 2.2 | 11.0h | 7.8/10 |
| 🌤️ March | 22°C | 28°C | 53% | 2.0 | 11.2h | 7.9/10 |
| 🌤️ April | 23°C | 29°C | 59% | 2.9 | 12.1h | 7.6/10 |
| 🌤️ May | 24°C | 30°C | 59% | 2.6 | 12.6h | 7.5/10 |
| 🌤️ June | 25°C | 31°C | 56% | 2.0 | 12.9h | 7.5/10 |
| ⛅ July | 25°C | 31°C | 67% | 2.7 | 12.7h | 7.3/10 |
| ⛅ August | 25°C | 31°C | 65% | 3.2 | 12.1h | 7.2/10 |
| ⛅ September | 25°C | 31°C | 74% | 5.3 | 11.5h | 7.1/10 |
| ⛅ October | 24°C | 30°C | 71% | 4.1 | 11.2h | 7.2/10 |
| ⛅ November | 24°C | 29°C | 67% | 4.4 | 10.7h | 7.3/10 |
| 🌤️ December | 23°C | 28°C | 57% | 2.1 | 10.8h | 7.7/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In May, San Juan averages 30°C, 59% rainy days and 12.6h of sunshine per day. Overall weather score: 7.5/10.
See methodology →
Comparison
May vs January (best month)
The best month is January (score 8.0/10). Difference:
- 🌡️ Max temperature : -2°C
- 🌧 Rainy days : -12%
- ☀️ Sunshine : -1.7h/day
FAQ
FAQ — San Juan in May
Is May a good time to visit San Juan?
May is an excellent time to visit San Juan (score 7.5/10). With 30°C, 12.6h of sunshine and 59% rain, conditions are very favourable.
Does it rain a lot in San Juan in May?
Yes, 59% of days see rain in May. Plan some indoor activities as backup.
Accommodation
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