Climate averages 1991–2020
Macapá weather
in September.
A hot, fairly dry month: the 3rd warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Macapá: daytime highs average 31.2°C and nights cool to about 24.8°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 26 mm of rain on roughly 9 days, which makes September a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 07 min on an average September day.
The nearest other city in this atlas is Santana (15 km away). In September its highs average 31.5°C, about as warm as Macapá, with 24 mm of rain.
Among the 448 cities listed in Brazil, Macapá ranks joint 88th of 448 for the warmest September highs and joint 79th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Macapá is 3.6°C warmer than that mean.
From September to October, average highs rise by 0.7°C to 31.8°C, and monthly rainfall falls from 26 mm to 17 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Macapá climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.5°C23.5°C | 23.5°C | 274 | 29.2 | 12.112 h |
| February | 28.0°C23.3°C | 23.3°C | 325 | 27.0 | 12.112 h |
| March | 28.1°C23.4°C | 23.4°C | 387 | 29.2 | 12.112 h |
| April | 28.1°C23.4°C | 23.4°C | 384 | 29.2 | 12.112 h |
| May | 28.4°C23.6°C | 23.6°C | 357 | 29.6 | 12.112 h |
| June | 28.7°C23.7°C | 23.7°C | 205 | 27.3 | 12.112 h |
| July | 29.0°C23.7°C | 23.7°C | 155 | 25.8 | 12.112 h |
| August | 30.1°C24.4°C | 24.4°C | 73 | 17.9 | 12.112 h |
| September, selected | 31.2°C24.8°C | 24.8°C | 26 | 8.7 | 12.112 h |
| October | 31.8°C25.0°C | 25.0°C | 17 | 4.5 | 12.112 h |
| November | 31.6°C25.0°C | 25.0°C | 35 | 8.5 | 12.112 h |
| December | 30.1°C24.3°C | 24.3°C | 128 | 22.8 | 12.112 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Santana in SeptemberBrazil · 15 kmHigh 31.5°C · Low 24.7°C · 24 mm rain
- Breves in SeptemberBrazil · 202 kmHigh 33.4°C · Low 24.5°C · 25 mm rain
- Cametá in SeptemberBrazil · 308 kmHigh 33.3°C · Low 24.7°C · 28 mm rain
- Abaetetuba in SeptemberBrazil · 312 kmHigh 32.4°C · Low 24.8°C · 19 mm rain
- Barcarena in SeptemberBrazil · 321 kmHigh 31.7°C · Low 24.8°C · 19 mm rain
- Belém in SeptemberBrazil · 330 kmHigh 31.7°C · Low 24.6°C · 24 mm rain
- Moju in SeptemberBrazil · 333 kmHigh 33.4°C · Low 24.0°C · 27 mm rain
- Ananindeua in SeptemberBrazil · 338 kmHigh 32.0°C · Low 24.1°C · 39 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Macapá) is explained once on the Macapá year overview and on the Sources, method and limits page.