Home › Compare › Castries vs Savannah

Castries vs Savannah

Af Tropical rainforestCfa Humid subtropical

Comparing Castries change · Savannah change

Bottom line

Castries is the warmer of the two — about 8°C on the annual average; Castries is the wetter, with 740 mm more rain a year.

Warmer Castries 8°C on the year

Wetter Castries 740 mm more a year

Sunnier Castries 6 pp less cloud

Colder winters Savannah 21°C colder nights

How the seasons compare

The differences between Castries and Savannah, in everyday terms.

Summers

Savannah has much hotter summers

Castries: Warm
Savannah: Hot

Winters

Castries has far milder winters

Castries: Stays warm
Savannah: Cool

Rain & snow

Castries is wetter

Castries: Very wet
Savannah: Wet

Sky

Similar amounts of sun

Castries: Fairly sunny
Savannah: Partly cloudy

Month-by-month charts

Temperature

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

Precipitation

Castries is the wetter — about 740 mm more across the year.

Clear skies

The two cities see a similar amount of sun.

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 (°C) Varies through the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Castries	27	27	27	28	28	28	28	29	29	29	28	27
Savannah	16	18	22	26	29	32	34	33	30	26	21	18
Difference	-10	-8	-5	-2	+1	+4	+5	+4	+1	-2	-7	-10

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Castries	27	27	27	28	28	28
Savannah	16	18	22	26	29	32
Difference	-10	-8	-5	-2	+1	+4

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Castries	28	29	29	29	28	27
Savannah	34	33	30	26	21	18
Difference	+5	+4	+1	-2	-7	-10

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Castries	26	25	25	26	27	27	27	28	28	28	27	26
Savannah	4	6	9	13	17	22	23	23	21	15	9	6
Difference	-21	-19	-16	-13	-9	-6	-4	-5	-7	-13	-18	-20

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Castries	26	25	25	26	27	27
Savannah	4	6	9	13	17	22
Difference	-21	-19	-16	-13	-9	-6

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Castries	27	28	28	28	27	26
Savannah	23	23	21	15	9	6
Difference	-4	-5	-7	-13	-18	-20

Precipitation (mm) Castries runs higher most of the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Castries	113	76	66	90	114	134	216	291	224	246	243	149
Savannah	83	71	89	86	92	169	146	139	110	94	61	82
Difference	-30	-5	+23	-4	-22	+35	-70	-153	-114	-152	-182	-68

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Castries	113	76	66	90	114	134
Savannah	83	71	89	86	92	169
Difference	-30	-5	+23	-4	-22	+35

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Castries	216	291	224	246	243	149
Savannah	146	139	110	94	61	82
Difference	-70	-153	-114	-152	-182	-68

Cloud cover (%) Varies through the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Castries	38	39	42	49	52	59	50	46	51	51	46	41
Savannah	56	58	53	49	50	55	56	56	51	44	46	55
Difference	+18	+19	+11	—	-2	-4	+6	+10	—	-7	—	+14

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Castries	38	39	42	49	52	59
Savannah	56	58	53	49	50	55
Difference	+18	+19	+11	—	-2	-4

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Castries	50	46	51	51	46	41
Savannah	56	56	51	44	46	55
Difference	+6	+10	—	-7	—	+14

Relative humidity (%) Varies through the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Castries	76	75	75	76	77	79	79	79	79	79	79	77
Savannah	81	80	77	73	71	74	75	77	78	77	78	81
Difference	+5	+6	+2	-3	-7	-4	-4	-2	-1	-2	-1	+4

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Castries	76	75	75	76	77	79
Savannah	81	80	77	73	71	74
Difference	+5	+6	+2	-3	-7	-4

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Castries	79	79	79	79	79	77
Savannah	75	77	78	77	78	81
Difference	-4	-2	-1	-2	-1	+4

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. Castries trends → · Savannah trends →

Both cities' Köppen climate types are projected to hold steady through 2099 (SSP2-4.5).

Methodology & sources

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.

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.

Savannah

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Savannah Intl AP (NOAA GHCN station USW00003822), about 11 km from the city centre.

How we build these numbers →

← change Castries · change Savannah → · Castries page · Savannah page