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Alajuela Weather in October
Thinking of visiting Alajuela in October? Expect high temperatures reaching 25°C (77°F) during the day, dropping to 17°C (63°F) at night, and be prepared for the wettest month of the year.
Rainfall in Alajuela in October
Alajuela is in the rainy season in October, with rain on around 23 days and an average of 442 mm (17 in). With high rainfall totals spread across the month, individual showers can be very heavy. Waterproof gear is strongly recommended.
Temperature in Alajuela in October
In October, Alajuela gets high temperatures, with highs of 25°C (77°F). Nights cool to around 17°C (63°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights cool down to 17°C (63°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in Alajuela in October
You can expect a moderate amount of sunlight, with approximately 162 hours. Even though this month is part of the wet season, you can still see the sun occasionally.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March and April typically offer the best weather for Alajuela.
Alajuela Temperature in October
Min Temperature
17°C (63°F)
Max Temperature
25°C (77°F)
Chance of Rain
77%
Precipitation
442 mm (17 in)
Rainy days
23 days
Humidity
87% *
Sunshine
162 hours *
Percentage Sunshine
*
* Data from: San José, Costa Rica (17 KM, 11 Miles).
Alajuela Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Alajuela - and find the best time to visit.
Daily Historical Temperatures
46-year average (1976-2025)
Based on our historical records, temperatures in Alajuela typically stay consistent throughout October, with daily highs averaging around 25°C (77°F). Nights are pleasant, with lows around 19°C (66°F).
Average temperatures in October
Daily Historical Precipitation
46-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in October
Historical weather records for Alajuela in October
Browse day-by-day weather records for Alajuela spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Alajuela historical weather extremes in October
Based on 31 years of weather observations in Alajuela between 1994 and 2025, these are the recorded extremes.
- Alajuela recorded its highest October temperature of 34°C (93°F) on October 1, 2012.
- Alajuela experienced its chilliest October day on October 5, 2017, reaching only 20°C (68°F).
- Alajuela registered its coldest October night on October 12, 2011, with temperatures dropping to 15°C (59°F).
- Peak precipitation in October occurred on October 5, 2017, when 172 mm (6.8 in) of precipitation was measured.
Best Places in Costa Rica in October
Find out more about the weather in Costa Rica and which places have the best travel conditions in this month. See all of Costa Rica in October →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Alajuela in October
For Alajuela in October, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Also bring a poncho, it will rain a lot! Waterproof everything you can. Sunglasses could come in handy during the sunnier parts of your trip.
What To Do in Alajuela in October
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Camping6/10
Alajuela 3-Day Forecast
More climate data for Alajuela
Temperature Rainfall Sunshine Humidity
See the full Alajuela climate overview or explore weather in Costa Rica.
Popular in October
Where to go in October - average daytime high across popular destinations.
Tamarindo
30°C (86°F) Santa Teresa28°C (82°F) Cahuita29°C (84°F) Fortuna28°C (82°F) Puerto Viejo de Talamanca29°C (84°F) Herradura28°C (82°F) Jacó28°C (82°F) San José24°C (75°F) Bucket list
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