San Pedro weather in September
September in San Pedro: sweltering, soaked, with clean air — fine if you can take 25 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#10 of 12 months in San Pedro · #884 of 1413 destinations to visit in September · comfort 74/100 (tier B)
- Days
- 31°C
- Nights
- 26°C
- Wet days
- 25
- Sun
- 10.5 h
- Humidity
- 85%
- Daylight
- 12 h

Traveller notes on San Pedro in September
Notes from nearby Caye Caulker (21 km away)
San Pedro doesn't have its own notes for September yet — these are about Caye Caulker, close enough to share the season.
Forum posters are direct that September sits within Belize's wet and hurricane season, with one of the higher rainfall totals of the year, though actual year-to-year experience varies. Posters consistently describe rain here as coming mostly overnight or as a brief afternoon shower, with days staying sunny and clear rather than washed out - one detailed week-long September stay reported rain only at night or early morning, with nighttime thunderstorms over the ocean described as a genuine visual highlight rather than a nuisance. Posters are consistent that despite hurricane-season nerves, September is actually one of the more beautiful times of year here, with real crowd relief given how much quieter the island runs, though posters note some businesses do close for the season.
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 — September
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in San Pedro in September
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.
BusySeptember Celebrations, school holidays in 2 of the markets that fill it(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).
Toughest weatherSan Pedro's weather peaks February–April.
September coincides with Hurricane season.
Best weatherFair weatherToughest weather
What's on in San Pedro in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Hazard
Hurricane season
1 Jun – 30 NovAmbergris Caye is a sandbar barely above the sea, and the plan for a serious storm is to move people to the mainland by boat and plane. Rates drop from August and some smaller places simply close. Source ↗
- Opening
Lobster season opens
15 Jun – 14 FebForaging seasonThe spiny lobster fishery opens on 15 June and closes on 15 February. San Pedro turns the opening into a week of street food and beach cook-offs, which is when it is cheapest and freshest. Source ↗
- Holiday
September Celebrations
10–21 SepNational holidayCrowdedClosuresSt George's Caye Day on 10 September and Independence Day on the 21st are public holidays, and the days between bring flags, street parties with loud music and parades. Banks and offices close on both holidays. Source ↗
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 September — FAQ
- Is September a good time to visit San Pedro?
- September in San Pedro: sweltering, soaked, with clean air — fine if you can take 25 rainy days. It ranks #10 of 12 months for San Pedro on SeasonMap's comfort score (74/100).
- What is the weather like in San Pedro in September?
- In September, San Pedro averages a daily high of 31.4°C and a low of 25.6°C, with about 198.5 mm of rain over roughly 25.1 rainy days.
- What is the air quality in San Pedro in September?
- San Pedro has a mean US Air Quality Index of about 36 in September.
Within 300 km: Caye Caulker's Lobster season opens on 15 Jun – 14 Feb, and Roatán's Coral spawning nights around 20 Aug – 25 Sep.