Heredia, Costa Rica climate

As Tropical savanna (dry summer)

Heredia has a remarkably steady warm-temperate climate (Tropical savanna (dry summer), Köppen As). The hottest month is April with an average daily high near 31°C, while the coldest is October averaging around 18°C at night. Precipitation totals about 1489 mm a year and is strongly seasonal — October alone averages 286 mm while March barely receives 4 mm.

☀️ All year

Warm

Daytime highs near 31°C most of the year.

🌙 Nights

Stays warm

Even the coolest nights stay near 18°C.

🌧️ Rain

Wet

About 1489 mm of rain a year.

Wettest in October

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Heredia climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	28	29	30	31	29	29	29	29	28	28	28	28
Avg temp (°C)	23	24	24	25	24	24	24	24	23	23	23	23
Avg low (°C)	18	18	19	19	19	19	19	19	18	18	18	18
Precipitation (mm)	7	7	4	53	176	209	130	177	258	286	146	35

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	28	29	30	31	29	29
Avg temp (°C)	23	24	24	25	24	24
Avg low (°C)	18	18	19	19	19	19
Precipitation (mm)	7	7	4	53	176	209

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	29	29	28	28	28	28
Avg temp (°C)	24	24	23	23	23	23
Avg low (°C)	19	19	18	18	18	18
Precipitation (mm)	130	177	258	286	146	35

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	43	38	41	67	82	85	85	84	84	84	78	57
Relative humidity (%)	76	69	63	67	80	87	86	87	89	91	89	83
Wind speed (m/s)	0.7	0.8	0.8	0.7	0.6	0.5	0.5	0.5	0.6	0.6	0.5	0.6

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	43	38	41	67	82	85
Relative humidity (%)	76	69	63	67	80	87
Wind speed (m/s)	0.7	0.8	0.8	0.7	0.6	0.5

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	85	84	84	84	78	57
Relative humidity (%)	86	87	89	91	89	83
Wind speed (m/s)	0.5	0.5	0.6	0.6	0.5	0.6

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 28 years of daily observations at Juan Santamaria Intl, a weather station, about 10 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →