January in Charlestown — reliably good (2nd best month)
Good · 7.4/10January averages 26°C (80°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 21 sunny days and 11.1 daylight hours.
It scores 7.4/10 here, 2nd of 12 months, against 7.6/10 in the destination's best month.
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.
February in Charlestown — reliably good (4th best month)
Good · 7.1/10February averages 26°C (79°F) with humidity around 77%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 55 mm, so plan one flexible day in three; you still get about 23 sunny days and 11.4 hours of daylight.
It scores 7.1/10 here, 4th of 12 months, against 7.6/10 in the destination's best month.
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.
March in Charlestown — the year's strongest window
Best window · 7.6/10March averages 26°C (79°F) with humidity around 76%, 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 31 sunny days and 11.9 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Charlestown at 7.6/10 — the reference point every other month on this page is measured against.
Expect peak pricing, and this is one of the busiest months here. 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 Charlestown — reliably good (3rd best month)
Good · 7.2/10April averages 27°C (80°F) with humidity around 77%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 40 mm of rain — occasional showers rather than washed-out days — alongside about 30 sunny days and 12.4 daylight hours.
It scores 7.2/10 here, 3rd of 12 months, against 7.6/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
May in Charlestown — workable with trade-offs
Trade-offs · 6.4/10May averages 28°C (83°F) with humidity around 79%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 47 mm, so plan one flexible day in three; you still get about 31 sunny days and 12.8 hours of daylight.
It scores 6.4/10 here, 6th of 12 months, against 7.6/10 in the destination's best month.
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.
June in Charlestown — workable with trade-offs
Trade-offs · 6.4/10June averages 29°C (84°F) with humidity around 79%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 37 mm of rain — occasional showers rather than washed-out days — alongside about 30 sunny days and 13 daylight hours.
It scores 6.4/10 here, 7th of 12 months, against 7.6/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
July in Charlestown — workable with trade-offs
Trade-offs · 5.5/10July 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 71 mm, so plan one flexible day in three; you still get about 30 sunny days and 12.9 hours of daylight.
It scores 5.5/10 here, 8th of 12 months, against 7.6/10 in the destination's best month.
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.
If your dates are flexible, March is materially better in Charlestown — 2.1 points higher on the same scale.
August in Charlestown — workable with trade-offs
Trade-offs · 5/10August 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 90 mm, so plan one flexible day in three; you still get about 31 sunny days and 12.6 hours of daylight.
It scores 5/10 here, 10th of 12 months, against 7.6/10 in the destination's best month.
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.
If your dates are flexible, March is materially better in Charlestown — 2.6 points higher on the same scale.
September in Charlestown — workable with trade-offs
Trade-offs · 5.1/10September averages 30°C (85°F) with humidity around 78%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 76 mm, so plan one flexible day in three; you still get about 28 sunny days and 12.1 hours of daylight.
It scores 5.1/10 here, 9th of 12 months, against 7.6/10 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.
If your dates are flexible, March is materially better in Charlestown — 2.5 points higher on the same scale.
October in Charlestown — the hardest end of the year
Hardest · 4.1/10October averages 29°C (85°F) with humidity around 78%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 136 mm this is a genuinely wet month: about 23 sunny days in total, and outdoor plans need an indoor fallback.
It scores 4.1/10 here, 12th of 12 months, against 7.6/10 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 proper rain shell rather than an umbrella.
If your dates are flexible, March is materially better in Charlestown — 3.5 points higher on the same scale.
November in Charlestown — the hardest end of the year
Hardest · 4.7/10November averages 28°C (83°F) with humidity around 78%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 101 mm this is a genuinely wet month: about 18 sunny days in total, and outdoor plans need an indoor fallback.
It scores 4.7/10 here, 11th of 12 months, against 7.6/10 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 proper rain shell rather than an umbrella.
If your dates are flexible, March is materially better in Charlestown — 2.9 points higher on the same scale.
December in Charlestown — workable with trade-offs
Trade-offs · 6.9/10December averages 27°C (81°F) with humidity around 75%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 24 mm of rain — occasional showers rather than washed-out days — alongside about 19 sunny days and 11 daylight hours.
It scores 6.9/10 here, 5th of 12 months, against 7.6/10 in the destination's best month.
Expect peak pricing, and crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
