When to go · St Lucia

When to go to Castries

Twelve months of averages for Castries, and what they say about when to go.

When to go

What the averages say

Mean daily highs and lows and the month's rain, averaged over 2001 to 2020.

On these averages, Castries has a mean high between 18°C and 32°C and under 150 mm of rain in December to June.

Wet months (150 mm of rain or more): July to November.
Humid months (a high of 25°C or more with relative humidity of 70% or more): January to December.
The warmest month is September (29°C) and the coolest February (27°C). The wettest is October (189 mm) and the driest February (44 mm); about 1,443 mm of rain falls in a year.

How these sentences are worded

Each sentence is written from the figures by fixed rules, and says no more than they do. Mild to warm: a mean daily high from 18°C up to 32°C. Hot: 32°C or more. Cool: 10°C up to 18°C. Cold: under 10°C. Dry: under 50 mm of rain in the month; wet: 150 mm or more. Humid: a high of 25°C or more with relative humidity of 70% or more. A month is described as good for going when it is mild to warm and not wet.

Castries: highs, lows and rainHighLowRain

The model's grid cell here is mostly sea, so the daily high and low sit closer together than they do on land: afternoons ashore are usually warmer, and nights cooler.

The year at a glance

Mild to warm and dry
Mild to warm, humid or showery
Hot
Cool
Wet
Cold

JanMild–warm, mixed
FebMild–warm, mixed
MarMild–warm, mixed
AprMild–warm, mixed
MayMild–warm, mixed
JunMild–warm, mixed
JulWet
AugWet
SeptWet
OctWet
NovWet
DecMild–warm, mixed

Month by month

Every month in Castries

The whole year, with humidity, cloud and the sunlight reaching the ground.

Climate in Castries by month: mean daily high and low, rain, and what the month is like
Month	High	Low	Rain	Humidity	Cloud	Sunlight (kWh/m²/day)	High in Dubai	What it is like
January	27°C	26°C	68 mm	76%	41%	5.2	23°C	Mild to warm, humid or showery
February	27°C	26°C	44 mm	74%	40%	5.8	24°C	Mild to warm, humid or showery
March	27°C	26°C	48 mm	75%	44%	6.3	27°C	Mild to warm, humid or showery
April	28°C	26°C	97 mm	76%	53%	6.5	31°C	Mild to warm, humid or showery
May	28°C	27°C	102 mm	77%	55%	6.3	35°C	Mild to warm, humid or showery
June	29°C	27°C	136 mm	78%	62%	5.9	37°C	Mild to warm, humid or showery
July	29°C	27°C	154 mm	79%	54%	6	39°C	Wet
August	29°C	28°C	179 mm	79%	48%	6.2	39°C	Wet
September	29°C	28°C	182 mm	78%	52%	6	37°C	Wet
October	29°C	28°C	189 mm	79%	56%	5.4	34°C	Wet
November	28°C	27°C	159 mm	79%	49%	5	29°C	Wet
December	28°C	27°C	85 mm	77%	42%	5	25°C	Mild to warm, humid or showery

The Dubai column is Dubai's mean daily high, for comparison.

Modelled averages for an area about 50 km across, not a weather station's record: NASA POWER climatology, 2001–2020. These data were obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program.

When to go nearby

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Plan a trip to Castries

Tell us when and who is travelling, and a person puts the flights, the stays and the rest into one quote.

Plan a trip to Castries More about Castries When to go

Month

High

Low

Rain

Humidity

Cloud

Sunlight (kWh/m²/day)

High in Dubai

What it is like

January

27°C

26°C

68 mm

76%

41%

5.2

23°C

Mild to warm, humid or showery

February

27°C

26°C

44 mm

74%

40%

5.8

24°C

Mild to warm, humid or showery

March

27°C

26°C

48 mm

75%

44%

6.3

27°C

Mild to warm, humid or showery

April

28°C

26°C

97 mm

76%

53%

6.5

31°C

Mild to warm, humid or showery

May

28°C

27°C

102 mm

77%

55%

6.3

35°C

Mild to warm, humid or showery

June

29°C

27°C

136 mm

78%

62%

5.9

37°C

Mild to warm, humid or showery

July

29°C

27°C

154 mm

79%

54%

39°C

Wet

August

29°C

28°C

179 mm

79%

48%

6.2

39°C

Wet

September

29°C

28°C

182 mm

78%

52%

37°C

Wet

October

29°C

28°C

189 mm

79%

56%

5.4

34°C

Wet

November

28°C

27°C

159 mm

79%

49%

29°C

Wet

December

28°C

27°C

85 mm

77%

42%

25°C

Mild to warm, humid or showery