August 11 sees frequent showers in San Jose. Historical data shows a 66% chance of rain, so pack accordingly. Temperatures average 25°C. You'll find plenty of company in San Jose this month as tourism activity remains quite robust.
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Essential Travel Info for San Jose
Currency
CRC
₡ Costa Rican colón
Language
Spanish
Driving
Right side
Connect
Cable TV channels have many American Eng...
Safety
High Safety
GPI: 1.732
San Jose Weather Forecast for August 11
"Rainy & Overcast. Expect average highs of 25.1°C. 66% chance of rain."
What to Wear in San Jose in August
Based on historical data for August 11, San Jose typically experiences temperatures between 17.4°C and 25.1°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 66% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for San Jose
Smart Suitcase
- T-Shirt
- Light Clothing
- Umbrella
Average High
25.1°C
Daytime Peak
Average Low
17.4°C
Nighttime Low
Feels Like
26.2°C
☀️ Minor difference
Rain Chance
66%
Avg 7mm if it rains
Cloud Cover
89%
Moderate rain
Pressure
1014 hPa
Low volatility
San Jose Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 85% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 09:30
16:00 - 17:00
Type I-II
🔴 22 min to burn
Type III-IV
🟡 33 min to burn
Type V-VI
🟢 55 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
22.8°C
Humid/Sticky
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Morning hours (before 11 AM)
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Costa Rica
Flight Traffic
Busy
77/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~91
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in San Jose
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:28
☀️ Noon
11:42
🌇 Sunset
17:57
⏱️ Daylight
12h 28m
Wind Speed
8.5 km/h
Light breeze
Sunshine
8.3 hrs
Direct Sun (Cloud-free)
Humidity
87%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for San Jose
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in San Jose
Travel Comfort Index
Real-time tourism conditions
Weather Quality
🌧️ Variable
Tourist Crowds
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Active seismic zone. Multiple earthquakes per year.
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, San Jose on August 11 averages 25.1°C with a 66% precipitation probability. Wedding/Outdoor Event Score: 62/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
San Jose Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
August 4
24.8°C • 60% rain
Score
72
August 7
24.9°C • 61% rain
Score
71
August 5
24.7°C • 63% rain
Score
70
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (August 11) in other destinations
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📍 Is San Jose Worth Visiting on August 11?
Planning a trip to San Jose on August 11? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 25.1°C with a 66% historical precipitation risk.
✈️ Travel Logistics: Approximately 91 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 9 vaccinations are recommended for Costa Rica, including COVID-19.
📊 Historical Extremes: The hottest August 11 recorded in the last 30 years saw temperatures hit 27.4°C in 2023, while the coldest dropped to 15.9°C in 2024.