Climate averages 1991–2020
Itacoatiara weather
in September.
A hot, wet month: one of the warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Itacoatiara: daytime highs average 31.2°C and nights cool to about 25.2°C. By daytime temperature it is one of the warmest months of the year.
Expect about 109 mm of rain on roughly 16 days, which makes September a wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 05 min on an average September day.
The nearest other city in this atlas is Manaus (176 km away). In September its highs average 31.2°C, about as warm as Itacoatiara, with 121 mm of rain.
Among the 448 cities listed in Brazil, Itacoatiara ranks joint 88th of 448 for the warmest September highs and joint 354th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Itacoatiara is 3.6°C warmer than that mean.
From September to October, average highs rise by 0.1°C to 31.2°C, and monthly rainfall rises from 109 mm to 140 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
Itacoatiara climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.6°C24.4°C | 24.4°C | 337 | 28.0 | 12.312 h |
| February | 28.6°C24.3°C | 24.3°C | 304 | 25.6 | 12.212 h |
| March | 28.8°C24.4°C | 24.4°C | 366 | 28.2 | 12.112 h |
| April | 28.7°C24.4°C | 24.4°C | 355 | 27.8 | 12.012 h |
| May | 28.7°C24.3°C | 24.3°C | 277 | 28.3 | 12.012 h |
| June | 29.0°C24.3°C | 24.3°C | 155 | 22.6 | 11.912 h |
| July | 29.4°C24.3°C | 24.3°C | 105 | 19.3 | 12.012 h |
| August | 30.6°C24.9°C | 24.9°C | 89 | 15.7 | 12.012 h |
| September, selected | 31.2°C25.2°C | 25.2°C | 109 | 15.8 | 12.112 h |
| October | 31.2°C25.4°C | 25.4°C | 140 | 16.9 | 12.212 h |
| November | 30.4°C25.2°C | 25.2°C | 178 | 20.5 | 12.312 h |
| December | 29.4°C24.8°C | 24.8°C | 268 | 25.8 | 12.312 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
- Manaus in SeptemberBrazil · 176 kmHigh 31.2°C · Low 24.6°C · 121 mm rain
- Parintins in SeptemberBrazil · 198 kmHigh 31.7°C · Low 24.9°C · 94 mm rain
- Manacapuru in SeptemberBrazil · 242 kmHigh 30.5°C · Low 25.0°C · 138 mm rain
- Itaituba in SeptemberBrazil · 301 kmHigh 32.9°C · Low 24.1°C · 78 mm rain
- Oriximiná in SeptemberBrazil · 325 kmHigh 31.9°C · Low 25.5°C · 71 mm rain
- Santarém in SeptemberBrazil · 422 kmHigh 31.2°C · Low 26.2°C · 68 mm rain
- Coari in SeptemberBrazil · 532 kmHigh 30.2°C · Low 24.6°C · 123 mm rain
- Altamira in SeptemberBrazil · 693 kmHigh 33.1°C · Low 24.2°C · 34 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 Itacoatiara) is explained once on the Itacoatiara year overview and on the Sources, method and limits page.