January in Castries — the year's strongest window
Best window · 9.6/10January averages 27°C (80°F) with humidity around 75%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 25 mm of rain — occasional showers rather than washed-out days — alongside about 21 sunny days and 11.3 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Castries at 9.6/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
February in Castries — the year's strongest window
Best window · 9.7/10February averages 27°C (80°F) with humidity around 75%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 16 mm of rain — occasional showers rather than washed-out days — alongside about 24 sunny days and 11.5 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Castries at 9.7/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
March in Castries — the year's strongest window
Best window · 9.8/10March averages 27°C (80°F) with humidity around 74%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rain is a non-issue at 12 mm for the month, with about 31 sunny days and 11.9 hours of daylight to work with.
On our climate-comfort scale this is the top-ranked month of the year for Castries at 9.8/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
April in Castries — the year's strongest window
Best window · 9.8/10April averages 28°C (82°F) with humidity around 75%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 22 mm of rain — occasional showers rather than washed-out days — alongside about 30 sunny days and 12.3 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Castries at 9.8/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
May in Castries — the year's strongest window
Best window · 9.7/10May averages 28°C (83°F) with humidity around 77%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 33 mm of rain — occasional showers rather than washed-out days — alongside about 30 sunny days and 12.6 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Castries at 9.7/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
June in Castries — the year's strongest window
Best window · 9/10June averages 29°C (84°F) with humidity around 79%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 71 mm, so plan one flexible day in three; you still get about 28 sunny days and 12.8 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Castries at 9/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
July in Castries — the year's strongest window
Best window · 9/10July averages 29°C (84°F) with humidity around 79%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 68 mm, so plan one flexible day in three; you still get about 28 sunny days and 12.8 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Castries at 9/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
August in Castries — the year's strongest window
Best window · 8.9/10August averages 29°C (85°F) with humidity around 79%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 74 mm, so plan one flexible day in three; you still get about 29 sunny days and 12.5 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Castries at 8.9/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
September in Castries — the year's strongest window
Best window · 8.9/10September averages 30°C (85°F) with humidity around 77%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 73 mm, so plan one flexible day in three; you still get about 27 sunny days and 12.1 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Castries at 8.9/10 — the reference point every other month on this page is measured against.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
October in Castries — the year's strongest window
Best window · 8.6/10October averages 29°C (85°F) with humidity around 77%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 87 mm, so plan one flexible day in three; you still get about 23 sunny days and 11.7 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Castries at 8.6/10 — the reference point every other month on this page is measured against.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
November in Castries — reliably good (12th best month)
Good · 8.4/10November averages 29°C (84°F) with humidity around 78%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 80 mm, so plan one flexible day in three; you still get about 20 sunny days and 11.3 hours of daylight.
It scores 8.4/10 here, 12th of 12 months, against 9.8/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
December in Castries — the year's strongest window
Best window · 9.3/10December averages 28°C (82°F) with humidity around 75%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 31 mm of rain — occasional showers rather than washed-out days — alongside about 19 sunny days and 11.2 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Castries at 9.3/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
