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Puerto Iguazú vs Castries

Cfa Humid subtropicalAf Tropical rainforest

Comparing Puerto Iguazú change · Castries change

Bottom line

Castries is the warmer of the two — about 8°F on the annual average; Castries is the wetter, with 27 in more rain a year, and Castries the sunnier.

Warmer Castries 8°F on the year

Wetter Castries 27 in more a year

Sunnier Castries 11 pp less cloud

Colder winters Puerto Iguazú 24°F colder nights

How the seasons compare

The differences between Puerto Iguazú and Castries, in everyday terms.

Summers

Puerto Iguazú has hotter summers

Puerto Iguazú: Hot
Castries: Warm

Winters

Castries has far milder winters

Puerto Iguazú: Mild
Castries: Stays warm

Rain & snow

Castries is wetter

Puerto Iguazú: Wet
Castries: Very wet

Sky

Castries is sunnier

Puerto Iguazú: Partly cloudy
Castries: Fairly sunny

Month-by-month charts

Temperature

Castries is the warmer of the two — about 8°F on the annual average.

Precipitation

Castries is the wetter — about 27 in more across the year.

Clear skies

Castries has the clearer skies — the higher line.

Exact monthly numbers

Tap a metric to open its full table. Desktop shows all twelve months; on a phone each metric splits into Jan–Jun and Jul–Dec.

Avg high (°F) Varies through the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Puerto Iguazú	91	90	89	84	76	74	74	79	82	86	88	90
Castries	80	80	80	82	83	83	83	84	84	83	83	81
Difference	-11	-10	-8	-2	+6	+9	+9	+4	+2	-2	-5	-9

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Puerto Iguazú	91	90	89	84	76	74
Castries	80	80	80	82	83	83
Difference	-11	-10	-8	-2	+6	+9

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Puerto Iguazú	74	79	82	86	88	90
Castries	83	84	84	83	83	81
Difference	+9	+4	+2	-2	-5	-9

Avg low (°F) Castries runs higher most of the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Puerto Iguazú	70	69	67	63	57	55	53	55	59	63	65	68
Castries	78	77	78	79	80	81	81	82	82	82	81	79
Difference	+8	+8	+10	+16	+23	+26	+28	+26	+23	+18	+16	+11

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Puerto Iguazú	70	69	67	63	57	55
Castries	78	77	78	79	80	81
Difference	+8	+8	+10	+16	+23	+26

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Puerto Iguazú	53	55	59	63	65	68
Castries	81	82	82	82	81	79
Difference	+28	+26	+23	+18	+16	+11

Precipitation (in) Varies through the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Puerto Iguazú	4.8	5	3.6	3.6	5.1	4	2.2	2.6	3.6	5.8	4.6	5.2
Castries	4.5	3	2.6	3.5	4.5	5.3	8.5	11.5	8.8	9.7	9.6	5.9
Difference	-0.4	-2	-1	-0.1	-0.6	+1.2	+6.3	+8.9	+5.2	+3.9	+4.9	+0.7

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Puerto Iguazú	4.8	5	3.6	3.6	5.1	4
Castries	4.5	3	2.6	3.5	4.5	5.3
Difference	-0.4	-2	-1	-0.1	-0.6	+1.2

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Puerto Iguazú	2.2	2.6	3.6	5.8	4.6	5.2
Castries	8.5	11.5	8.8	9.7	9.6	5.9
Difference	+6.3	+8.9	+5.2	+3.9	+4.9	+0.7

Cloud cover (%) Puerto Iguazú runs higher most of the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Puerto Iguazú	63	63	56	54	55	58	53	50	56	62	58	65
Castries	38	39	42	49	52	59	50	46	51	51	46	41
Difference	-25	-25	-14	-5	-3	+1	-4	-4	-5	-10	-12	-25

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Puerto Iguazú	63	63	56	54	55	58
Castries	38	39	42	49	52	59
Difference	-25	-25	-14	-5	-3	+1

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Puerto Iguazú	53	50	56	62	58	65
Castries	50	46	51	51	46	41
Difference	-4	-4	-5	-10	-12	-25

Relative humidity (%) Castries runs higher most of the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Puerto Iguazú	72	73	72	75	80	84	82	76	72	77	73	71
Castries	76	75	75	76	77	79	79	79	79	79	79	77
Difference	+4	+2	+3	+1	-3	-5	-3	+3	+6	+3	+6	+6

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Puerto Iguazú	72	73	72	75	80	84
Castries	76	75	75	76	77	79
Difference	+4	+2	+3	+1	-3	-5

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Puerto Iguazú	82	76	72	77	73	71
Castries	79	79	79	79	79	77
Difference	-3	+3	+6	+3	+6	+6

How both climates are changing

Both cities are warming. Each city has its own warming trend; see its trends page for the year-by-year detail. Puerto Iguazú trends → · Castries trends →

Methodology & sources

Puerto Iguazú

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Cataratas Intl, a weather station, about 9 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.

Castries

Temperature — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.

Precipitation — 1991–2020 normals computed from 10 years of daily observations at LE Lamentin, a weather station, about 66 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →

← change Puerto Iguazú · change Castries → · Puerto Iguazú page · Castries page