January in Isla Mujeres: mixed conditions, plan around the weather
Trade-offs · 6.8/10January averages 25°C (77°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
At 123 mm this is a genuinely wet month: about 13 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 6.8/10 here, 10th 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 light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
Flexible dates? April scores 2.8 points higher here — enough to change the trip.
February ranks 4th of 12 for Isla Mujeres — one of the best windows
Best window · 8.5/10February averages 25°C (77°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 69 mm, so plan one flexible day in three; you still get about 19 days with 6+ hours of sunshine and 11.3 hours of daylight.
A 8.5/10 puts this among the year's best months in Isla Mujeres (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 is one of the strongest months in Isla Mujeres (3rd)
Best window · 9.5/10Days in March average 27°C (80°F) and humidity near 75% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
With around 44 mm of rain, any showers tend to pass through rather than settle in; about 28 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 Isla Mujeres at 9.5/10 (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 Isla Mujeres — the year's strongest window
Best window · 9.6/10April averages 27°C (81°F) and humidity near 73%, 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 Isla Mujeres 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 ranks 2nd of 12 for Isla Mujeres — one of the best windows
Best window · 9.6/10Days in May average 29°C (84°F) and humidity near 73% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
With around 42 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 Isla Mujeres 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 Isla Mujeres: strong conditions, 8th of 12
Good · 7.5/10June averages 29°C (83°F) and humidity near 81%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
207 mm makes this the wettest stretch of the year, though about 28 days with 6+ hours of sunshine still appear — keep an indoor fallback ready.
It scores 7.5/10 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 2.1 points higher here — enough to change the trip.
July holds up well in Isla Mujeres — 5th best month
Good · 7.9/10July averages 29°C (84°F) and humidity near 83%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Monthly rainfall reaches 135 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 7.9/10 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 1.7 points higher here — enough to change the trip.
August in Isla Mujeres — reliably good (6th best month)
Good · 7.9/10Days in August average 29°C (84°F) and humidity near 83% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
138 mm of rain makes this a wet month here, though with about 31 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.9/10 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 Isla Mujeres — 1.7 points higher on the same scale.
September holds up well in Isla Mujeres — 7th best month
Good · 7.8/10Days in September average 28°C (83°F) and humidity near 85% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
135 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 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, April is materially better in Isla Mujeres — 1.8 points higher on the same scale.
October holds up well in Isla Mujeres — 9th best month
Good · 7.2/10October averages 28°C (82°F) and humidity near 81%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Monthly rainfall reaches 177 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 Isla Mujeres — workable with trade-offs
Trade-offs · 6.6/10November averages 27°C (80°F) and humidity near 83%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
At 145 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 6.6/10 here, 11th 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 points higher here — enough to change the trip.
December in Isla Mujeres — workable with trade-offs
Trade-offs · 6.5/10With 25°C (77°F) on average, December delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
109 mm of rain signals a properly wet month, with only about 10 days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 6.5/10 on the same scale — 12th 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 Isla Mujeres — 3.1 points higher on the same scale.
