Mérida, Yucatán climate

Aw Tropical savanna (dry winter)

Mérida has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is May with an average daily high near 36°C, while the coldest is January averaging around 17°C at night. Precipitation totals about 1035 mm a year and is strongly seasonal — September alone averages 175 mm while March barely receives 21 mm.

☀️ All year

Very hot

Daytime highs near 36°C most of the year.

🌙 Nights

Stays warm

Even the coolest nights stay near 17°C.

🌧️ Rain

Wet

About 1035 mm of rain a year.

Wettest in September

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

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)

Mérida climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	30	32	33	35	36	35	35	35	34	33	31	30
Avg temp (°C)	24	25	26	28	29	28	28	28	28	26	25	24
Avg low (°C)	17	17	18	20	21	21	21	21	21	20	19	17
Precipitation (mm)	33	26	21	33	67	169	138	145	175	136	56	35

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	30	32	33	35	36	35
Avg temp (°C)	24	25	26	28	29	28
Avg low (°C)	17	17	18	20	21	21
Precipitation (mm)	33	26	21	33	67	169

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	35	35	34	33	31	30
Avg temp (°C)	28	28	28	26	25	24
Avg low (°C)	21	21	21	20	19	17
Precipitation (mm)	138	145	175	136	56	35

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	50	44	40	41	51	63	57	56	60	52	44	50
Relative humidity (%)	70	65	59	57	60	74	77	80	84	83	77	74
Wind speed (km/h)	0.9	0.9	1.0	1.0	1.0	0.9	0.8	0.8	0.8	0.9	0.9	0.9

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	50	44	40	41	51	63
Relative humidity (%)	70	65	59	57	60	74
Wind speed (km/h)	0.9	0.9	1.0	1.0	1.0	0.9

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	57	56	60	52	44	50
Relative humidity (%)	77	80	84	83	77	74
Wind speed (km/h)	0.8	0.8	0.8	0.9	0.9	0.9

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from CONAGUA / SMN, Mexico's national weather service, measured at Merida (conagua), about 4 km from the city centre.

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 →