San Pedro weather in May
May in San Pedro: sweltering, a little rain, with muggy air — fine if you can take 37°C afternoons.
Updated September 2026 · climate normals from ERA5 reanalysis
#6 of 12 months in San Pedro · #620 of 1413 destinations to visit in May · comfort 83/100 (tier A)
- Days
- 32°C
- Nights
- 26°C
- Wet days
- 14
- Sun
- 11.4 h
- Humidity
- 80%
- Daylight
- 13 h

Traveller notes on San Pedro in May
Notes from nearby Caye Caulker (21 km away)
San Pedro doesn't have its own notes for May yet — these are about Caye Caulker, close enough to share the season.
Caye Caulker-forum threads on May weather call it hot and humid, high 20s to low 30s Celsius with humidity high enough to make it feel warmer than the number alone suggests. Precipitation totals are described as low for the month, but posters note a few showers are still likely, usually overnight, early morning, or a brief afternoon burst rather than a washed-out day. May specifically marks the tail end of the low-rain season, the last stretch before the wetter pattern that starts in June takes over. Wind is called a non-issue this month, one less thing to plan around. The record: 31.2C days feeling like a sticky 37C, 26.5C nights, 73mm across 14.5 days, an 82 percent humidity, a 29.4C sea and 11.4 hours of sun.
Other months in San Pedro
San Pedro's forum says October weather can be genuinely nice, with wind being the bigger day-to-day factor than rain itself - a typical day still runs sunny, hot and humid. When rain does show up it's usually overnight or a brief afternoon shower, rarely an all-day downpour, and posters were consistent it rarely derails plans. October is technically the tail end of hurricane season, but actual hurricanes hit only about once every five years on average, and several locals specifically recommended the month for the slow-season deals and quieter island.
Forum posters consistently describe April on Ambergris Caye as hot and dry, with average daily highs around 31C and overnight lows around 24C. Posters are direct that although rainfall is very low this time of year, a few days can still bring rain - typically overnight or early morning, or a brief afternoon shower, with the rest of the day staying sunny and fine. Posters consistently emphasize it doesn't rain every day and there are no all-day downpours to worry about. Posters generally rate April as one of the better months to visit San Pedro, with good, reliable weather for diving and beach days.
Add your own note from San Pedro's card on the map.
San Pedro climate normals — May
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in San Pedro in May
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonan ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for San Pedro's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherSan Pedro's weather peaks February–April.
Best weatherFair weatherToughest weather
What's on in San Pedro in May
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Sargassum season
1 Apr – 31 Aug · usuallyRiskThe weed lands on the windward beaches through the spring and summer, and how bad it gets varies enormously year to year. The bigger hotels rake it at dawn; the public stretches south of town often do not.
Nearby, and something's on
Within 300 km of San Pedro — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is San Pedro?
San Pedro in May — FAQ
- Is May a good time to visit San Pedro?
- May in San Pedro: sweltering, a little rain, with muggy air — fine if you can take 37°C afternoons. It ranks #6 of 12 months for San Pedro on SeasonMap's comfort score (83/100).
- What is the weather like in San Pedro in May?
- In May, San Pedro averages a daily high of 31.6°C and a low of 26.2°C, with about 74.7 mm of rain over roughly 14.1 rainy days.
- What is the air quality in San Pedro in May?
- San Pedro has a mean US Air Quality Index of about 54 in May.
Within 300 km: Placencia's Whale sharks at Gladden Spit around 15 Mar – 15 Jun, and Tulum's Sea turtle nesting on 1 May – 31 Oct.