Santarém in September
In September, Santarém averages 32°C (89°F) during the day and 26°C (80°F) at night, with frequent rain — about 18 days of the month see precipitation (50 mm total).
ShoulderConditions are warm and beach-friendly. Expect daily rain or showers, often in heavy bursts.
September is one of the wetter and less comfortable months in Santarém. If your dates are flexible, consider a different time of year.
How September compares to the rest of the year in Santarém
September is one of the warmest months in Santarém (2nd of 12) and one of the driest months (12th of 12). Daytime temperature runs 2°C above the annual average (30°C). September runs 1°C warmer than August (31°C) and stays flat into October.
September sunrise & sunset in Santarém
Times shown for Santarém local time (America/Santarem), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Santarém — September
Golden-hour and blue-hour windows for the 15th of September, in Santarém's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Santarém 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 Santarém's popularity.
Crowds & pricing — September in Santarém
Santarém 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 Santarém
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.
Santarém in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 29°C / 84°F | 25°C / 76°F | 371 mm | 30 | — |
| February | 29°C / 84°F | 24°C / 76°F | 427 mm | 28 | — |
| March | 29°C / 83°F | 24°C / 76°F | 505 mm | 31 | — |
| April | 29°C / 84°F | 24°C / 76°F | 453 mm | 30 | — |
| May | 29°C / 84°F | 25°C / 76°F | 362 mm | 31 | — |
| June | 29°C / 84°F | 25°C / 77°F | 177 mm | 29 | — |
| July | 29°C / 85°F | 25°C / 77°F | 120 mm | 27 | — |
| August | 31°C / 87°F | 26°C / 79°F | 63 mm | 20 | — |
| September | 32°C / 89°F | 26°C / 80°F | 50 mm | 18 | — |
| October | 32°C / 89°F | 27°C / 80°F | 76 mm | 20 | — |
| November | 31°C / 88°F | 26°C / 79°F | 169 mm | 22 | — |
| December | 30°C / 86°F | 25°C / 77°F | 286 mm | 25 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Santarém in September →
Frequently asked questions
How hot is Santarém in September?
In September, Santarém averages a high of 32°C (89°F) and a low of 26°C (80°F) — generally hot.
Does it rain a lot in Santarém in September?
September is quite rainy in Santarém, with about 18 rainy days on average.
Is September a good time to visit Santarém?
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 Santarém in September?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full September packing list for Santarém for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.