Climate averages 1991–2020
Barra do Piraí weather
in May.
A warm, moderately wet month: the 10th warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Barra do Piraí: daytime highs average 24.5°C and nights cool to about 16.3°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 53 mm of rain on roughly 9 days, which makes May a moderately wet month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 03 min on an average May day.
The nearest other city in this atlas is Japeri (26 km away). In May its highs average 26.3°C, 1.7°C warmer than Barra do Piraí, with 67 mm of rain.
Among the 448 cities listed in Brazil, Barra do Piraí ranks joint 258th of 448 for the warmest May highs and joint 140th of 448 for the driest May (rainfall, lowest first). The mean May high of those 448 cities is 25.3°C; Barra do Piraí is 0.8°C cooler than that mean.
From May to June, average highs fall by 0.3°C to 24.2°C, and monthly rainfall falls from 53 mm to 28 mm.
The annual picture
May 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
Barra do Piraí climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.4°C21.2°C | 21.2°C | 282 | 22.0 | 13.313 h |
| February | 30.0°C21.3°C | 21.3°C | 202 | 17.7 | 12.913 h |
| March | 28.4°C20.6°C | 20.6°C | 195 | 20.5 | 12.212 h |
| April | 26.8°C19.0°C | 19.0°C | 89 | 12.3 | 11.612 h |
| May, selected | 24.5°C16.3°C | 16.3°C | 53 | 9.1 | 11.111 h |
| June | 24.2°C14.9°C | 14.9°C | 28 | 5.4 | 10.811 h |
| July | 24.0°C14.4°C | 14.4°C | 28 | 5.4 | 10.911 h |
| August | 25.3°C15.1°C | 15.1°C | 27 | 5.4 | 11.311 h |
| September | 26.4°C16.9°C | 16.9°C | 66 | 9.9 | 11.912 h |
| October | 27.3°C18.4°C | 18.4°C | 112 | 13.9 | 12.613 h |
| November | 27.0°C19.2°C | 19.2°C | 202 | 19.1 | 13.213 h |
| December | 28.5°C20.5°C | 20.5°C | 248 | 22.1 | 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
May in nearby cities
- Japeri in MayBrazil · 26 kmHigh 26.3°C · Low 18.1°C · 67 mm rain
- Valença (Rio de Janeiro), Brazil in MayBrazil · 28 kmHigh 23.5°C · Low 15.1°C · 54 mm rain
- Volta Redonda in MayBrazil · 29 kmHigh 24.2°C · Low 15.6°C · 49 mm rain
- Seropédica in MayBrazil · 33 kmHigh 25.7°C · Low 17.8°C · 67 mm rain
- Barra Mansa in MayBrazil · 36 kmHigh 24.1°C · Low 15.5°C · 47 mm rain
- Queimados in MayBrazil · 39 kmHigh 25.8°C · Low 17.7°C · 58 mm rain
- Itaguaí in MayBrazil · 43 kmHigh 25.4°C · Low 18.8°C · 67 mm rain
- Nova Iguaçu in MayBrazil · 50 kmHigh 25.9°C · Low 18.1°C · 58 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 Barra do Piraí) is explained once on the Barra do Piraí year overview and on the Sources, method and limits page.