Climate averages 1991–2020
Itaboraí weather
in August.
A warm, moderately wet month: the 9th warmest and the driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
August is a warm month in Itaboraí: daytime highs average 24.9°C and nights cool to about 15.8°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 43 mm of rain on roughly 7 days, which makes August a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 20 min on an average August day.
The nearest other city in this atlas is Maricá (20 km away). In August its highs average 25.1°C, about as warm as Itaboraí, with 38 mm of rain.
Among the 448 cities listed in Brazil, Itaboraí ranks joint 279th of 448 for the warmest August highs and joint 285th of 448 for the driest August (rainfall, lowest first). The mean August high of those 448 cities is 26.2°C; Itaboraí is 1.2°C cooler than that mean.
From August to September, average highs rise by 1.0°C to 25.9°C, and monthly rainfall rises from 43 mm to 82 mm.
The annual picture
August 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
Itaboraí climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.7°C22.5°C | 22.5°C | 259 | 21.3 | 13.413 h |
| February | 30.1°C22.5°C | 22.5°C | 203 | 18.2 | 12.913 h |
| March | 28.6°C21.8°C | 21.8°C | 220 | 21.7 | 12.212 h |
| April | 27.0°C20.1°C | 20.1°C | 108 | 14.2 | 11.612 h |
| May | 24.8°C17.5°C | 17.5°C | 77 | 10.9 | 11.011 h |
| June | 24.4°C16.1°C | 16.1°C | 44 | 6.9 | 10.811 h |
| July | 24.1°C15.4°C | 15.4°C | 44 | 7.3 | 10.911 h |
| August, selected | 24.9°C15.8°C | 15.8°C | 43 | 7.4 | 11.311 h |
| September | 25.9°C17.4°C | 17.4°C | 82 | 11.1 | 11.912 h |
| October | 27.0°C19.1°C | 19.1°C | 112 | 13.4 | 12.613 h |
| November | 27.0°C20.1°C | 20.1°C | 210 | 18.7 | 13.213 h |
| December | 28.7°C21.6°C | 21.6°C | 255 | 21.6 | 13.513 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
August in nearby cities
- Maricá in AugustBrazil · 20 kmHigh 25.1°C · Low 18.2°C · 38 mm rain
- Magé in AugustBrazil · 21 kmHigh 25.3°C · Low 16.0°C · 44 mm rain
- São Gonçalo in AugustBrazil · 22 kmHigh 25.3°C · Low 16.8°C · 44 mm rain
- Rio de Janeiro in AugustBrazil · 38 kmHigh 25.9°C · Low 17.5°C · 41 mm rain
- Teresópolis in AugustBrazil · 38 kmHigh 21.8°C · Low 12.9°C · 49 mm rain
- Petrópolis in AugustBrazil · 42 kmHigh 22.5°C · Low 13.5°C · 42 mm rain
- Saquarema in AugustBrazil · 43 kmHigh 23.8°C · Low 18.4°C · 36 mm rain
- Duque de Caxias in AugustBrazil · 47 kmHigh 26.1°C · Low 16.7°C · 44 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 Itaboraí) is explained once on the Itaboraí year overview and on the Sources, method and limits page.