Belém in September
In September, Belém averages 32°C (90°F) during the day and 24°C (75°F) at night, with frequent rain — about 24 days of the month see precipitation (45 mm total).
ShoulderConditions are very hot — early-morning and evening sightseeing recommended. Expect daily rain or showers, often in heavy bursts.
September is one of the wetter and less comfortable months in Belém. If your dates are flexible, consider a different time of year.
How September compares to the rest of the year in Belém
September is one of the warmest months in Belém (2nd of 12) and one of the driest months (11th of 12). Daytime temperature runs 2°C above the annual average (30°C). September runs 1°C warmer than August (32°C) and stays flat into October.
September sunrise & sunset in Belém
Times shown for Belém local time (America/Belem), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Belém — September
Golden-hour and blue-hour windows for the 15th of September, in Belém's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Belém in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Belém's popularity.
Crowds & pricing — September in Belém
Belém is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Sun & mosquito risk — September in Belém
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sea temperature in Belém — September
Belém's sea temperature barely shifts through the year — within 1.0°C of itself, month to month.
Belém in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 29°C / 85°F | 24°C / 75°F | 277 mm | 31 | — |
| February | 29°C / 84°F | 24°C / 75°F | 353 mm | 28 | — |
| March | 29°C / 84°F | 24°C / 75°F | 468 mm | 31 | — |
| April | 29°C / 84°F | 24°C / 75°F | 464 mm | 30 | — |
| May | 30°C / 86°F | 24°C / 76°F | 274 mm | 31 | — |
| June | 30°C / 86°F | 24°C / 75°F | 134 mm | 29 | — |
| July | 31°C / 87°F | 24°C / 75°F | 94 mm | 26 | — |
| August | 32°C / 89°F | 24°C / 75°F | 46 mm | 24 | — |
| September | 32°C / 90°F | 24°C / 75°F | 45 mm | 24 | — |
| October | 32°C / 90°F | 24°C / 76°F | 61 mm | 26 | — |
| November | 32°C / 89°F | 25°C / 76°F | 89 mm | 23 | — |
| December | 31°C / 87°F | 24°C / 76°F | 175 mm | 26 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Belém in September →
Frequently asked questions
How hot is Belém in September?
In September, Belém averages a high of 32°C (90°F) and a low of 24°C (75°F) — generally hot.
Does it rain a lot in Belém in September?
September is quite rainy in Belém, with about 24 rainy days on average.
Is September a good time to visit Belém?
September is hot but on the rainy side. It suits travelers who are comfortable with hot weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Belém in September?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full September packing list for Belém for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.