San Mateo Weather in April
With daytime temperatures of 30°C (86°F) and nighttime lows of 22°C (72°F), April in San Mateo brings very high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 143 mm (5.6 in) falls on average.
Rainfall in San Mateo in April
Typically, about 8 days will experience rainfall, with an average of 143 mm (5.6 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in San Mateo in April
Temperatures in San Mateo in April top out at 30°C (86°F) and drop to 22°C (72°F) overnight. For most visitors, the main thing to prepare for is the heat during the day. Nights remain mild at 22°C (72°F), making evenings a pleasant time to be outdoors.
Sunshine in San Mateo in April
Expect a lot of sunshine this month, with about 255 hours of sun. These sunny conditions add to the overall experience.If you prefer dry days with pleasant temperatures, December typically offers the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
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 San Mateo's climate page.
San Mateo Temperature in April
Min Temperature
22°C (72°F)
Max Temperature
30°C (86°F)
Chance of Rain
28%
Precipitation
143 mm (5.6 in)
Rainy days
8 days
Sunshine
255 hours *
Percentage Sunshine
*
Daily Historical Temperatures
44-year average (1976-2025)
Based on our historical records, temperatures in San Mateo typically stay consistent throughout April, with daily highs averaging around 30°C (86°F). Nights are pleasant, with lows around 20°C (68°F).
Average temperatures in April
Daily Historical Precipitation
44-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in April
Historical weather for San Mateo in April
Browse day-by-day weather records for San Mateo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Mateo historical weather extremes in April
Based on 31 years of weather observations (1995-2026), these are the most extreme conditions recorded in San Mateo.
- San Mateo recorded its highest April temperature of 35°C (95°F) on April 5, 1998.
- The lowest daytime temperature in April was 22°C (72°F), recorded on April 30, 1995.
- The coldest night in April in San Mateo was on April 21, 2022, with a minimum of 16°C (61°F).
Best Places in Costa Rica in April
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 April →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in San Mateo in April
Warm but pleasant conditions in San Mateo in April. 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. Expect heavy rainfall, so bring good rain protection and waterproof bags. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in San Mateo in April
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 San Mateo's climate page.
See the full San Mateo climate overview or explore weather in Costa Rica.
