Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
September verdict
Costa Rica in September
Weather score49Mixed
Mixed for holiday weather
Average highs sit around 28°C, giving warm days by monthly-average standards. Sunshine averages 5h per day, enough for a balanced month. Rainfall averages 370mm, so showers are a real planning factor.
September weather
Monthly averages
Temp
28°C
Rain
370mm
Sun
5h
Sea
20°C
Weather score
49
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 370mm, so showers are a real planning factor.
Some sun
Sunshine averages 5h per day, enough for a balanced month.
Cool sea
Sea temperatures average 20°C, so the water can feel cool.
Map
Weather map
Compare Costa Rica with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September28°C average high
September is close to Costa Rica's usual daytime heat, with little temperature swing across the year.
Warmest monthsAll year
Daytime heat stays consistently warm through the year.
Rain
September370mm average rain
September is wetter than Costa Rica'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 hours average sun
September is one of Costa Rica's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsJanuary to April
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September20°C average sea
September is close to Costa Rica's usual sea temperature, with limited seasonal change in the water.
Warmest seaAll year
Sea temperatures stay warm enough for easy swimming through the year.
Weather score
September49 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 April and December
These months have the strongest weather score in the monthly averages.
Hotels near Costa Rica
Marriott
Los Suenos Marriott Ocean & Golf ResortHerradura, Costa Rica
Marriott Vacation Club at Los SueñosHerradura, Costa Rica
Santa Lucia Jungle Hacienda, Autograph CollectionTarcoles, Puntarenas, Costa Rica
Four Points by Sheraton San Jose Costa RicaSan Jose, Costa Rica
Residence Inn San Jose EscazuSan Jose, Costa Rica
AC Hotel San Jose EscazuEscazu, San Jose, Costa Rica