Costa Rica Climatic Classifications

CodeDescriptionGroupNumber of states/regionsStates/regions
AmTropical monsoonTropical3 Alajuela Heredia San José
AwTropical wet and dry or savannaTropical2 Guanacaste Puntarenas
AfTropical rainforestTropical1 Limón
CfbMarine west coast, warm summerTemperate1 Cartago

Summary: Most regions (3) in Costa Rica lie in the Tropical monsoon climate zone (Köppen: Am). The mean average of annual temperatures range from a high of 27.88°C (82.18°F) in Guanacaste to a low of 20.08°C (68.14°F) in Cartago.

Climate Costa Rica: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)30.84(87.51)32.61(90.7)33.94(93.09)34.98(94.96)33.01(91.42)30.82(87.48)30.43(86.77)30.83(87.49)30.19(86.34)29.76(85.57)29.26(84.67)29.6(85.28)34.98(94.96)
Average high °C (°F)26.71(80.08)27.89(82.2)28.62(83.52)28.87(83.97)27.38(81.28)26.39(79.5)26.21(79.18)26.49(79.68)26.13(79.03)25.43(77.77)25.55(77.99)25.83(78.49)26.79(80.22)
Daily mean °C (°F)22.83(73.09)23.7(74.66)24.39(75.9)25.06(77.11)24.53(76.15)23.83(74.89)23.44(74.19)23.62(74.52)23.48(74.26)22.95(73.31)22.61(72.7)22.41(72.34)23.57(74.43)
Average low °C (°F)17.54(63.57)17.83(64.09)18.37(65.07)19.7(67.46)20.56(69.01)20.22(68.4)19.46(67.03)19.52(67.14)19.77(67.59)19.39(66.9)18.67(65.61)17.83(64.09)19.07(66.33)
Record low °C (°F)13.56(56.41)13.75(56.75)14.32(57.78)15.7(60.26)16.78(62.2)16.71(62.08)15.74(60.33)15.81(60.46)16.21(61.18)15.87(60.57)14.84(58.71)13.94(57.09)13.56(56.41)
Average precipitation mm (inches)38.41(1.51)28.27(1.11)30.13(1.19)76.52(3.01)271.66(10.7)299.53(11.79)248.55(9.79)284.18(11.19)303.56(11.95)332.04(13.07)171.85(6.77)80.34(3.16)180.42(7.1)
Average precipitation days (≥ 1.0 mm)5.775.96.4413.2123.2224.6624.0123.6525.9626.020.7111.0817.55
Average relative humidity (%)74.0570.7970.2772.8179.7884.4283.4983.3785.186.1584.2679.2779.48
Mean monthly sunshine hours10.3210.7810.9110.9510.3110.6611.3810.410.049.7810.1410.5510.52

Costa Rica Climate Graph

Costa Rica

Costa Rica’s Cities by Temperature

Costa Rica’s states/regions ranking by average yearly temperature:

Guanacaste
27.88°C | 82.18°F
Puntarenas
27.35°C | 81.23°F
Limón
27.13°C | 80.83°F
Alajuela
21.91°C | 71.44°F
Heredia
20.33°C | 68.59°F
San José
20.33°C | 68.59°F
Cartago
20.08°C | 68.14°F

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