Historical data suggests significant rain risk (91%) on October 18. If you seek sun, consider a different date. Bring rain gear! 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 October 18
"Rainy & Overcast. Expect average highs of 23.7°C. 91% chance of rain."
What to Wear in San Jose in October
Based on historical data for October 18, San Jose typically experiences temperatures between 16.9°C and 23.7°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 91% 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
23.7°C
Daytime Peak
Average Low
16.9°C
Nighttime Low
Feels Like
24.6°C
☀️ Feels accurate
Rain Chance
91%
Avg 14.9mm if it rains
Cloud Cover
91%
Moderate rain
Pressure
1013.5 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 96% 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
🔴 67 min to burn
Type III-IV
🟡 101 min to burn
Type V-VI
🟢 168 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
22.3°C
Humid/Sticky
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Costa Rica
Flight Traffic
Busy
66/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~78
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in San Jose
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:26
☀️ Noon
11:22
🌇 Sunset
17:19
⏱️ Daylight
11h 53m
Wind Speed
7.4 km/h
Light breeze
Sunshine
6.7 hrs
Direct Sun (Cloud-free)
Humidity
92%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for San Jose
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 San Jose
Travel Comfort Index
Real-time tourism conditions
Weather Quality
🌧️ Variable
Tourist Crowds
🟡 Busy
Price Level
💰💰 Moderate
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 October 18 averages 23.7°C with a 91% precipitation probability. Wedding/Outdoor Event Score: 43/100."
— 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
October 25
23.8°C • 79% rain
Score
55
October 24
23.9°C • 85% rain
Score
49
October 16
23.5°C • 88% rain
Score
46
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (October 18) in other destinations
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🌍 Explore the same date in different destinations around the world
📍 Is San Jose Worth Visiting on October 18?
Planning a trip to San Jose on October 18? 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 23.7°C with a 91% historical precipitation risk.
✈️ Travel Logistics: Approximately 78 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 October 18 recorded in the last 30 years saw temperatures hit 26.6°C in 2020, while the coldest dropped to 14.6°C in 2019.