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Best Time to Visit Saint Lucia
Climate based on Castries • 2015–2024
The best overall weather in Saint Lucia is in September, with average highs around 30°C. The single best 14-day window: Aug 29 - Sep 11. The hottest month is September (30°C highs) and the coolest is January (27°C highs).
Year-at-a-glance heatmap
Each cell is colored by the typical daytime high for that day. Hover for rainfall and sunshine.
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Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
- Freezingbelow 0°C
- Very Cold0–5°C
- Cold5–12°C
- Fresh12–18°C
- Comfortable18–25°C
- Warm25–30°C
- Very Warm30–39°C
- Smoking Hot39°C+
Best 14-day travel windows
Top pick
Aug 29 - Sep 11
14-day window • Avg 28°C • Very Warm
Alternative 1
Sep 20 - Oct 3
14-day window • Avg 28°C • Warm
Alternative 2
Aug 15 - Aug 28
14-day window • Avg 28°C • Warm
Month-by-month breakdown
January
Warm26°Cavg
- 27°C / 24°C
- 63mm total
- 10.8h sun/day
February
Warm26°Cavg
- 27°C / 24°C
- 48mm total
- 11.1h sun/day
March
Warm26°Cavg
- 28°C / 24°C
- 53mm total
- 11.6h sun/day
April
Warm27°Cavg
- 29°C / 25°C
- 42mm total
- 11.8h sun/day
May
Warm27°Cavg
- 29°C / 25°C
- 51mm total
- 11.7h sun/day
June
Warm27°Cavg
- 29°C / 25°C
- 99mm total
- 11.3h sun/day
July
Warm27°Cavg
- 29°C / 25°C
- 121mm total
- 11.5h sun/day
August
Warm28°Cavg
- 30°C / 26°C
- 118mm total
- 11.2h sun/day
September
Very Warm28°Cavg
- 30°C / 26°C
- 110mm total
- 11.2h sun/day
October
Warm28°Cavg
- 30°C / 26°C
- 105mm total
- 10.8h sun/day
November
Warm27°Cavg
- 29°C / 25°C
- 118mm total
- 10.5h sun/day
December
Warm26°Cavg
- 28°C / 25°C
- 65mm total
- 10.7h sun/day
Plan your trip to Saint Lucia
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