Weather in Cancún in March

Prime time. March is about as good as Cancún gets. Highs average 28.2 °C, lows 22.9 °C, and rain falls on 6 days — nothing in the month is working against you.

March ranks 2 of 12 in Cancún. Only February scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain falls on only 6 days, so an itinerary with no wet-weather fallback is a reasonable risk. Pack for 28.2 °C days and 22.9 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: the day barely swings — 5.3 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest March day reached 32.8 °C and the coldest night fell to 16.3 °C, and the wettest single day dropped 38 mm — roughly 100% of the month's rain in one day.

March is moderately variable: 10 mm in the driest year against 76 mm in the wettest, around an average of 38 mm. Roughly two Marchs in three land near that average, and the third does something else entirely.

Wind is light at 9.4 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 72%.

How March sits in the year

Temperatures hold steady either side: 27.2 °C in February, 28.2 here, 29.5 in April. Nothing about the timing within the month matters much.

Daylight in March

12 hours of daylight, gaining 0.6 hours across the month. That is between Cancún's extremes of 13.4 and 10.9 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 25.3 °C in March — warm enough to stay in as long as you like. The sea peaks at 29 °C in August and bottoms out at 25.1 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead. If the dates are flexible, November is the trade worth considering — 13 points weaker on weather, and materially quieter.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

March in Cancún versus nearby

If Cancún is one option among several, the nearby comparison is worth making. Mérida is the weaker option in March — 5.4 °C warmer, 2 days less rain. Key West is close enough to be a coin toss — 4.2 °C cooler, 1 day less rain.

So: March is effectively as good as it gets here — 1 points behind February, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Cancún

See all twelve months in Cancún, or where else to go in March.