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

San Pedro🇧🇿 Belize · Yucatán & Belize · Island74
  1. 85Jan
  2. 91Feb
  3. 90Mar
  4. 88Apr
  5. 83May
  6. 69Jun
  7. 79Jul
  8. 74Aug
  9. 74Sep
  10. 71Oct
  11. 76Nov
  12. 84Dec

#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
San Pedro, Belize
Photo: Roy Serafin · Pexels

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.
Tripadvisor community · September · 1 month ago · about Caye Caulker · Read more on Tripadvisor ↗

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.
AmbergrisCayeRegular · October · 1 month ago · Read more on Tripadvisor ↗
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.
Tripadvisor community · April · 1 month ago · Read more on Tripadvisor ↗

Add your own note from San Pedro's card on the map.

San Pedro climate normals — September

Daytime high31°C / 89°F🔥 sweltering
Nighttime low26°C / 78°F
Feels like (high)39°C / 102°F
Rainfall199 mm / 7.8 in⛈ soaked
Rainy days25 days
Humidity85%💦 very humid
Dew point25°C / 78°F
Sunshine10.5 h/day
Daylight12.2 h
Wind14 km/h / 9 mph
Air quality (US AQI)36🍃 good

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)

JFMAMJJASOND

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.

JFMAMJJASOND

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 Nov

    Ambergris 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 season

    The 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 holidayCrowdedClosures

    St 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 ↗

What's on around the world in September →

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?

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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.