Alajuela Weather in August
In Alajuela, August brings high daytime temperatures around 26°C (79°F), with nights cooling to 17°C (63°F). This month falls within the rainy season, so expect frequent rainfall.
Rainfall in Alajuela in August
Alajuela is in the rainy season in August, with rain on around 24 days and an average of 353 mm (14 in). With high rainfall totals spread across the month, individual showers can be very heavy. Waterproof gear is strongly recommended.
Temperature in Alajuela in August
Temperatures in Alajuela in August top out at 26°C (79°F) and drop to 17°C (63°F) overnight. Conditions stay fairly consistent through the month, making it easier to plan what to wear. At 17°C (63°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Alajuela in August
The month brings about 160 hours of sunlight, offering a comfortable mix of sun and rainy moments.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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Costa Rica, check out our Alajuela's climate page.
Alajuela Temperature in August
Min Temperature
17°C (63°F)
Max Temperature
26°C (79°F)
Chance of Rain
78%
Precipitation
353 mm (14 in)
Rainy days
24 days
Humidity
83% *
Sunshine
160 hours *
Percentage Sunshine
*
Daily Historical Temperatures
43-year average (1976-2025)
Based on our historical records, temperatures in Alajuela typically stay consistent throughout August, with daily highs averaging around 26°C (79°F). Nights are pleasant, with lows around 19°C (66°F).
Average temperatures in August
Daily Historical Precipitation
43-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Alajuela in August
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 August
Based on 29 years of weather observations (1996-2025), these are the most extreme conditions recorded in Alajuela.
- Alajuela recorded its highest August temperature of 35°C (95°F) on August 23, 2019.
- Alajuela experienced its chilliest August day on August 26, 2020, reaching only 22°C (72°F).
- The coldest night in August in Alajuela was on August 2, 2018, with a minimum of 13°C (55°F).
Best Places in Costa Rica in August
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 August →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Alajuela in August
Warm but pleasant conditions in Alajuela in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Alajuela in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Costa Rica, check out our Alajuela's climate page.
Temperature Rainfall Sunshine Humidity
See the full Alajuela climate overview or explore weather in Costa Rica.
