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Aswān vs Castries

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Comparing Aswān change · Castries change

Bottom line

Aswān and Castries have nearly identical year-round temperatures; Castries is the wetter, with 1897 mm more rain a year, and Aswān the sunnier.

Year-round temp About the same within 1°C on the year

Wetter Castries 1897 mm more a year

Sunnier Aswān 28 pp less cloud

Colder winters Aswān 15°C colder nights

How the seasons compare

The differences between Aswān and Castries, in everyday terms.

Summers

Aswān has far hotter summers

Aswān: Extreme heat
Castries: Warm

Winters

Castries has far milder winters

Aswān: Cool
Castries: Stays warm

Rain & snow

Castries is much wetter

Aswān: Very dry
Castries: Very wet

Sky

Aswān is far sunnier

Aswān: Sunny
Castries: Fairly sunny

Month-by-month charts

Temperature

Aswān and Castries run remarkably close all year.

Precipitation

Castries is the wetter — about 1897 mm more across the year.

Clear skies

Aswān 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 (°C) Aswān runs higher most of the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Aswān	23	25	30	35	39	42	42	42	40	36	30	25
Castries	27	27	27	28	28	28	28	29	29	29	28	27
Difference	+4	+1	-3	-8	-11	-13	-13	-13	-11	-8	-2	+3

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Aswān	23	25	30	35	39	42
Castries	27	27	27	28	28	28
Difference	+4	+1	-3	-8	-11	-13

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Aswān	42	42	40	36	30	25
Castries	28	29	29	29	28	27
Difference	-13	-13	-11	-8	-2	+3

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Aswān	10	11	15	20	24	27	28	28	25	22	16	11
Castries	26	25	25	26	27	27	27	28	28	28	27	26
Difference	+16	+14	+10	+6	+2	+1	—	—	+2	+5	+11	+15

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Aswān	10	11	15	20	24	27
Castries	26	25	25	26	27	27
Difference	+16	+14	+10	+6	+2	+1

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Aswān	28	28	25	22	16	11
Castries	27	28	28	28	27	26
Difference	—	—	+2	+5	+11	+15

Precipitation (mm) Castries runs higher most of the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Aswān	9	0	18	10	9	0	0	0	0	10	8	0
Castries	113	76	66	90	114	134	216	291	224	246	243	149
Difference	+104	+76	+48	+79	+105	+134	+216	+291	+224	+237	+234	+149

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Aswān	9	0	18	10	9	0
Castries	113	76	66	90	114	134
Difference	+104	+76	+48	+79	+105	+134

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Aswān	0	0	0	10	8	0
Castries	216	291	224	246	243	149
Difference	+216	+291	+224	+237	+234	+149

Cloud cover (%) Castries runs higher most of the year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Aswān	22	22	25	26	25	13	13	14	14	13	15	21
Castries	38	39	42	49	52	59	50	46	51	51	46	41
Difference	+16	+16	+17	+23	+27	+45	+37	+32	+37	+38	+32	+19

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Aswān	22	22	25	26	25	13
Castries	38	39	42	49	52	59
Difference	+16	+16	+17	+23	+27	+45

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Aswān	13	14	14	13	15	21
Castries	50	46	51	51	46	41
Difference	+37	+32	+37	+38	+32	+19

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Aswān	42	33	25	19	17	16	18	19	22	27	37	44
Castries	76	75	75	76	77	79	79	79	79	79	79	77
Difference	+34	+41	+50	+57	+61	+62	+61	+59	+57	+52	+42	+33

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Aswān	42	33	25	19	17	16
Castries	76	75	75	76	77	79
Difference	+34	+41	+50	+57	+61	+62

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Aswān	18	19	22	27	37	44
Castries	79	79	79	79	79	77
Difference	+61	+59	+57	+52	+42	+33

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. Aswān trends → · Castries trends →

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

Methodology & sources

Aswān

Temperature & precipitation — 1991–2020 normals computed from 25 years of daily observations at Asswan, a weather station, about 18 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 Aswān · change Castries → · Aswān page · Castries page