Costa Rica San José Weather in October — Climate Guide
October in San José is moderate
San José Weather in October — Quick Answer
As of 2026- Avg temp
- 25° / 16°
- Rainfall
- 295mm · 21 days
- Crowds
- Quiet
As of 2026, San José in October averages a high of 25°C and low of 16°C with 295mm of rain over about 21 days. Peak rains on the Pacific side — around 25°C/16°C with frequent heavy downpours. Full rain gear, quick-dry layers, and waterproof shoes essential. Warm layer for the cloud forest and volcanoes.
October is moderate for San José.
October is the rainiest month for San José, the Central Valley, and the Pacific coast — the climax of the green season. Daytime highs ease slightly to around 25°C, nights are 16°C, and rainfall is at its yearly high (about 295mm), with frequent, heavy storms.
It's the cheapest, quietest month, ideal only if you're comfortable building flexibility around heavy rain. Mornings can still be bright, so plan outdoor activities early, and use rainy afternoons for indoor museums, hot springs, or a cooking class.
Travel score
San José October Weather Stats
Avg High
25°C
Avg Low
16°C
Rainy Days
21
295mm total
Sunshine
5h
Daily avg
Humidity
82%
muggy
UV Index
10
Very high
Wind
8 km/h
Gusts 16
Crowds
Quiet
At attractions
October Sunrise & Sunset
Air Quality
PM2.5
14 μg/m³
PM10
26 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
27°C
Nighttime
17°C
Humidity and wind affect how the actual temperature feels.
Wind
8 km/h
Max gust 16 km/h
Activities Recommended for October
October Travel Pros & Cons
Pros
- Lowest prices and emptiest attractions
- Caribbean side at its sunniest
- Lush, dramatic green landscapes
- Best value of the year
Cons
- Wettest month — heavy Pacific rains
- Frequent cloud over volcano craters
- Possible road/transfer disruptions
- High humidity
October Events & Festivals
- Wettest month (Pacific side)
- Caribbean coast at its driest and sunniest
- Lowest-season value continues
San José in October — Full Picture
October is the rainiest month for San José, the Central Valley, and the Pacific coast — the climax of the green season. Daytime highs ease slightly to around 25°C, nights are 16°C, and rainfall is at its yearly high (about 295mm), with frequent, heavy storms.
It's the cheapest, quietest month, ideal only if you're comfortable building flexibility around heavy rain. Mornings can still be bright, so plan outdoor activities early, and use rainy afternoons for indoor museums, hot springs, or a cooking class.
The striking regional contrast is the story of October: as the Pacific drowns, the Caribbean coast (Limón, Tortuguero) is often at its driest and sunniest of the year. Travelers chasing sun this month should head east rather than west.
Volcano craters are frequently clouded over, so manage expectations. Pack serious rain gear, waterproof footwear, a dry bag, and a warm layer for the cool highlands, and keep transfer plans flexible in case of weather disruptions.
What to Wear & What to Pack
Peak rains on the Pacific side — around 25°C/16°C with frequent heavy downpours. Full rain gear, quick-dry layers, and waterproof shoes essential. Warm layer for the cloud forest and volcanoes.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
26°C
16.7°C
8/mo
Summer (Jun·Jul·Aug)
26°C
17°C
17.7/mo
Autumn (Sep·Oct·Nov)
Current25.3°C
16°C
18/mo
Winter (Dec·Jan·Feb)
24.3°C
15°C
2.3/mo
San José Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Best) | 24° | 15° | 2d·15mm | 8h | 70% | 11 | Very busy | Peak |
| February (Best) | 25° | 15° | 1d·10mm | 8.5h | 68% | 11 | Busy | Peak |
| March (Best) | 26° | 16° | 2d·20mm | 8.5h | 65% | 12 | Busy | Peak |
| April (Best) | 26° | 17° | 5d·50mm | 7.5h | 68% | 12 | Busy | Peak |
| 26° | 17° | 17d·230mm | 6h | 78% | 11 | Moderate | Shoulder | |
| 26° | 17° | 19d·245mm | 5.5h | 80% | 11 | Moderate | Shoulder | |
| 26° | 17° | 16d·180mm | 6h | 78% | 11 | Busy | Shoulder | |
| 26° | 17° | 18d·210mm | 5.5h | 80% | 11 | Moderate | Shoulder | |
| 26° | 16° | 20d·280mm | 5h | 82% | 10 | Quiet | Low season | |
| 25° | 16° | 21d·295mm | 5h | 82% | 10 | Quiet | Low season | |
| 25° | 16° | 13d·130mm | 6h | 78% | 10 | Moderate | Shoulder | |
| December (Best) | 24° | 15° | 4d·40mm | 7.5h | 72% | 11 | Very busy | Peak |
View Other Months
San José October Hotel Picks
Frequently Asked Questions
Is October a good time to visit San José?
San José in October is moderate. Tourist crowds are quiet and flight/hotel prices are low season.
What's the average temperature in San José in October?
San José October averages a high of 25°C and a low of 16°C.
Does it rain much in San José in October?
San José October averages 295mm of rainfall over about 21 rainy days.
What should I wear in San José in October?
Peak rains on the Pacific side — around 25°C/16°C with frequent heavy downpours. Full rain gear, quick-dry layers, and waterproof shoes essential. Warm layer for the cloud forest and volcanoes.
What time are sunrise and sunset in San José in October?
San José October sunrise is 05:25 and sunset is 17:25, with 12h 00min of daylight.
What's the air quality like in San José in October?
San José October air quality (AQI) averages 38, rated Good. PM2.5 averages 14μg/m³.
What activities are recommended in San José in October?
In October, San José is great for Caribbean coast / Tortuguero (driest, turtles), Arenal hot springs, City museums.
Is October peak season in San José?
San José October crowds are quiet and prices are low season. You can travel relatively comfortably without long queues.
Best Months to Visit San José
View Other Months
Planning a October trip to San José?
You've checked the weather — next come the budget and the route.
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.