January in Cozumel: strong conditions, 10th of 12
Good · 7.1/10January averages 26°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
At 124 mm this is a genuinely wet month: about 15 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 7.1/10 here, 10th of 12 months, against 9.6/10 in the destination's best month.
Plan for mid-season pricing, with crowds are light for this destination.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
Flexible dates? April scores 2.5 points higher here — enough to change the trip.
February is one of the strongest months in Cozumel (4th)
Best window · 8.7/10February averages 25°C (78°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 68 mm, so plan one flexible day in three; you still get about 20 days with 6+ hours of sunshine and 11.3 hours of daylight.
A 8.7/10 puts this among the year's best months in Cozumel (4th of 12); only April scores higher, at 9.6/10.
Plan for mid-season pricing, with crowds are moderate.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
March ranks 3rd of 12 for Cozumel — one of the best windows
Best window · 9.4/10Days in March average 27°C (80°F) and humidity near 76% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
With around 45 mm of rain, any showers tend to pass through rather than settle in; about 29 days with 6+ hours of sunshine and 11.9 hours of daylight fill the rest.
On our climate-comfort scale this is one of the strongest months of the year for Cozumel at 9.4/10 (3rd of 12), just behind April at 9.6/10.
Budget for 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 Cozumel — the year's strongest window
Best window · 9.6/10April averages 27°C (81°F) and humidity near 76%, 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 days with 6+ hours of sunshine and 12.5 daylight hours.
On our climate-comfort scale this is the top-ranked month of the year for Cozumel at 9.6/10 — the reference point every other month on this page is measured against.
Figure on peak pricing, with 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 is one of the strongest months in Cozumel (2nd)
Best window · 9.6/10Days in May average 29°C (83°F) and humidity near 77% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
With around 40 mm of rain, any showers tend to pass through rather than settle in; about 31 days with 6+ hours of sunshine and 13 hours of daylight fill the rest.
On our climate-comfort scale this is one of the strongest months of the year for Cozumel at 9.6/10 (2nd of 12), just behind April at 9.6/10.
Expect peak pricing, and crowds are moderate. 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.
June in Cozumel — reliably good (8th best month)
Good · 7.4/10June averages 29°C (84°F) and humidity near 82%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
216 mm makes this the wettest stretch of the year, though about 27 days with 6+ hours of sunshine still appear — keep an indoor fallback ready.
It scores 7.4/10 here, 8th of 12 months, against 9.6/10 in the destination's best month.
Figure on low-season pricing, with 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.
Flexible dates? April scores 2.2 points higher here — enough to change the trip.
July in Cozumel — reliably good (5th best month)
Good · 8/10July averages 29°C (84°F) and humidity near 82%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Monthly rainfall reaches 127 mm — wet for this destination — but about 31 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 8/10 here, 5th of 12 months, against 9.6/10 in the destination's best month.
Plan for mid-season pricing, with crowds are moderate.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Flexible dates? April scores 1.6 points higher here — enough to change the trip.
August in Cozumel: strong conditions, 6th of 12
Good · 7.8/10Days in August average 29°C (84°F) and humidity near 82% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
144 mm of rain makes this a wet month here, though with about 29 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.8/10 on the same scale — 6th of 12 months, versus 9.6/10 for the best month here.
Expect mid-season pricing, and crowds are moderate.
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, April is materially better in Cozumel — 1.8 points higher on the same scale.
September in Cozumel: strong conditions, 7th of 12
Good · 7.8/10Days in September average 29°C (84°F) and humidity near 84% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
137 mm of rain makes this a wet month here, though with about 25 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.8/10 on the same scale — 7th of 12 months, versus 9.6/10 for the best month here.
Budget for 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 proper rain shell rather than an umbrella.
If your dates are flexible, April is materially better in Cozumel — 1.8 points higher on the same scale.
October in Cozumel — reliably good (9th best month)
Good · 7.2/10October averages 28°C (83°F) and humidity near 81%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Monthly rainfall reaches 186 mm — wet for this destination — but about 20 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 7.2/10 here, 9th of 12 months, against 9.6/10 in the destination's best month.
Figure on low-season pricing, with 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.
Flexible dates? April scores 2.4 points higher here — enough to change the trip.
November in Cozumel: mixed conditions, plan around the weather
Trade-offs · 6.4/10November averages 27°C (81°F) and humidity near 82%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 164 mm this is a genuinely wet month: about 14 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 6.4/10 here, 12th of 12 months, against 9.6/10 in the destination's best month.
Plan for low-season pricing, with 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.
Flexible dates? April scores 3.2 points higher here — enough to change the trip.
December in Cozumel: mixed conditions, plan around the weather
Trade-offs · 6.7/10With 26°C (79°F) on average, December delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
106 mm of rain signals a properly wet month, with only about 11 days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 6.7/10 on the same scale — 11th of 12 months, versus 9.6/10 for the best month here.
Budget for low-season pricing, and crowds are light for this destination.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
If your dates are flexible, April is materially better in Cozumel — 2.9 points higher on the same scale.
