Cool
Average highs are around 19°C, so pack for cooler days.
September verdict
Chirripo National Park, Costa Rica in September
Weather score35Poor
Poor for holiday weather
Average highs are around 19°C, so pack for cooler days. Sunshine averages 5.4h per day, enough for a balanced month. Rainfall averages 497mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
19°C
Rain
497mm
Sun
5.4h
Sea
29°C
Weather score
35
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 497mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.4h per day, enough for a balanced month.
Warm sea
Sea temperatures average 29°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Chirripo National Park, Costa Rica with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September19°C average high
September is close to Chirripo National Park's usual daytime heat, with little temperature swing across the year.
Warmest monthsAll year
Daytime heat stays consistently warm through the year.
Rain
September497mm average rain
September is wetter than Chirripo National Park's yearly average, so flexible plans matter more.
Driest monthsJanuary to April and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.4 hours average sun
September is close to Chirripo National Park's usual sunshine level, with limited seasonal swing across the year.
Brightest monthsJanuary to June
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September29°C average sea
September is close to Chirripo National Park's yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJanuary to September
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
September35 weather score
September is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJanuary to March
These months have the strongest weather score in the monthly averages.
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