Climate averages 1991–2020
Rio das Ostras weather
in June.
A warm, fairly dry month: the 11th warmest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
June is a warm month in Rio das Ostras: daytime highs average 24.7°C and nights cool to about 17.9°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 31 mm of rain on roughly 6 days, which makes June a fairly dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 47 min on an average June day.
The nearest other city in this atlas is Macaé (23 km away). In June its highs average 24.5°C, about as warm as Rio das Ostras, with 30 mm of rain.
Among the 448 cities listed in Brazil, Rio das Ostras ranks joint 219th of 448 for the warmest June highs and joint 158th of 448 for the driest June (rainfall, lowest first). The mean June high of those 448 cities is 24.7°C; Rio das Ostras is level with that mean.
From June to July, average highs fall by 0.3°C to 24.4°C, and monthly rainfall falls from 31 mm to 29 mm.
The annual picture
June 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
Rio das Ostras climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.4°C23.2°C | 23.2°C | 206 | 16.5 | 13.313 h |
| February | 29.8°C23.4°C | 23.4°C | 141 | 12.8 | 12.913 h |
| March | 28.6°C22.8°C | 22.8°C | 172 | 17.6 | 12.212 h |
| April | 27.2°C21.3°C | 21.3°C | 85 | 12.1 | 11.612 h |
| May | 25.1°C19.1°C | 19.1°C | 60 | 9.5 | 11.111 h |
| June, selected | 24.7°C17.9°C | 17.9°C | 31 | 5.9 | 10.811 h |
| July | 24.4°C17.4°C | 17.4°C | 29 | 5.6 | 10.911 h |
| August | 25.0°C17.8°C | 17.8°C | 34 | 6.5 | 11.311 h |
| September | 25.7°C18.9°C | 18.9°C | 73 | 10.0 | 11.912 h |
| October | 26.6°C20.2°C | 20.2°C | 108 | 11.9 | 12.613 h |
| November | 26.8°C21.0°C | 21.0°C | 203 | 17.5 | 13.213 h |
| December | 28.4°C22.4°C | 22.4°C | 222 | 19.0 | 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
June in nearby cities
- Macaé in JuneBrazil · 23 kmHigh 24.5°C · Low 18.4°C · 30 mm rain
- São Pedro da Aldeia in JuneBrazil · 38 kmHigh 23.6°C · Low 19.3°C · 32 mm rain
- Cabo Frio in JuneBrazil · 41 kmHigh 23.7°C · Low 19.8°C · 34 mm rain
- Araruama in JuneBrazil · 56 kmHigh 23.6°C · Low 19.5°C · 43 mm rain
- Nova Friburgo in JuneBrazil · 66 kmHigh 21.9°C · Low 13.8°C · 43 mm rain
- Saquarema in JuneBrazil · 68 kmHigh 23.8°C · Low 18.8°C · 40 mm rain
- Itaboraí in JuneBrazil · 97 kmHigh 24.4°C · Low 16.1°C · 44 mm rain
- Maricá in JuneBrazil · 100 kmHigh 24.7°C · Low 18.6°C · 42 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 Rio das Ostras) is explained once on the Rio das Ostras year overview and on the Sources, method and limits page.