Climate averages 1991–2020
Japeri weather
in August.
A warm, fairly dry 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 Japeri: daytime highs average 26.9°C and nights cool to about 16.6°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 35 mm of rain on roughly 7 days, which makes August a fairly dry 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 Seropédica (13 km away). In August its highs average 26.2°C, 0.7°C cooler than Japeri, with 35 mm of rain.
Among the 448 cities listed in Brazil, Japeri ranks joint 161st of 448 for the warmest August highs and joint 231st of 448 for the driest August (rainfall, lowest first). The mean August high of those 448 cities is 26.2°C; Japeri is 0.7°C warmer than that mean.
From August to September, average highs rise by 1.1°C to 28.0°C, and monthly rainfall rises from 35 mm to 79 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
Japeri climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 31.3°C23.1°C | 23.1°C | 273 | 20.9 | 13.313 h |
| February | 31.7°C23.1°C | 23.1°C | 199 | 17.7 | 12.913 h |
| March | 30.1°C22.4°C | 22.4°C | 200 | 20.2 | 12.212 h |
| April | 28.5°C20.7°C | 20.7°C | 106 | 13.0 | 11.612 h |
| May | 26.3°C18.1°C | 18.1°C | 67 | 10.2 | 11.011 h |
| June | 26.0°C16.6°C | 16.6°C | 40 | 6.7 | 10.811 h |
| July | 25.7°C16.0°C | 16.0°C | 40 | 6.3 | 10.911 h |
| August, selected | 26.9°C16.6°C | 16.6°C | 35 | 6.7 | 11.311 h |
| September | 28.0°C18.5°C | 18.5°C | 79 | 11.0 | 11.912 h |
| October | 29.0°C20.1°C | 20.1°C | 114 | 13.9 | 12.613 h |
| November | 28.7°C21.0°C | 21.0°C | 190 | 18.6 | 13.213 h |
| December | 30.3°C22.3°C | 22.3°C | 226 | 20.7 | 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
- Seropédica in AugustBrazil · 13 kmHigh 26.2°C · Low 16.0°C · 35 mm rain
- Queimados in AugustBrazil · 13 kmHigh 26.3°C · Low 16.2°C · 32 mm rain
- Nova Iguaçu in AugustBrazil · 24 kmHigh 26.4°C · Low 16.4°C · 32 mm rain
- Barra do Piraí in AugustBrazil · 26 kmHigh 25.3°C · Low 15.1°C · 27 mm rain
- Itaguaí in AugustBrazil · 26 kmHigh 25.6°C · Low 17.1°C · 35 mm rain
- Belford Roxo in AugustBrazil · 29 kmHigh 26.3°C · Low 16.8°C · 32 mm rain
- Duque de Caxias in AugustBrazil · 38 kmHigh 26.1°C · Low 16.7°C · 44 mm rain
- Valença (Rio de Janeiro), Brazil in AugustBrazil · 44 kmHigh 24.1°C · Low 13.7°C · 30 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 Japeri) is explained once on the Japeri year overview and on the Sources, method and limits page.
Itaguaí and Seropédica lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.