Rio das Ostras weather in November
In November, Rio das Ostras has daytime highs averaging 27 °C, nights around 21 °C, with 17 wet days, and a sea temperature of 22 °C. Figures are 1991–2020 climate normals.
- 26.9°C Average high
- 21.1°C Average low
- 17days Wet days
- 192mm Rainfall
- 22.4°C Sea temperature
- 13h Daylight
Daily temperatures through November
How November develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 November | 26.5 °C | 20.8 °C | 54 % |
| 11–20 November | 26.9 °C | 21.3 °C | 62 % |
| 21–30 November | 27.2 °C | 21.3 °C | 55 % |
- Rain is most likely over days 11–20 of November (62 % of days) and least likely over days 1–10 (54 %).
What to expect
| Measure | Typical November | Share of the month |
|---|---|---|
| Days above 25 °C | 20 of 30 | 67 % |
| Days above 30 °C | 6.0 of 30 | 20 % |
| Days below 0 °C | 0 of 30 | 0 % |
| Days with more than 1 mm rain | 17 of 30 | 57 % |
Conditions in November
| Measure | Average |
|---|---|
| Mean temperature | 24 °C |
| Record high (1991–2020) | 36 °C |
| Record low (1991–2020) | 15 °C |
| Relative humidity | 82 % |
| Wind speed | 18 km/h |
| Cloud cover | 73 % |
November compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 29.4 °C | 199 mm | 68 % |
| September | 25.8 °C | 71 mm | 55 % |
| October | 26.7 °C | 105 mm | 66 % |
| November | 26.9 °C | 192 mm | 73 % |
| December | 28.4 °C | 209 mm | 70 % |
See all twelve months for Rio das Ostras
- November is the 6th warmest month here.
- It is the 10th driest month of the year.
- It ranks 12th for least cloud cover.
- Days last about 13 hours from sunrise to sunset.
- It rains on 17 of 30 days — 57 % of the month.
- Nights are about 5.8 °C cooler than the middle of the day.
- The hottest November day on record since 1991 reached 36 °C, 9.3 °C above the usual daytime high.
- Beach score: 71 / 100 — see how this is calculated.
QuestionsNovember in Rio das Ostras, answered
How warm is Rio das Ostras in November?
Daily highs average 27 °C and nights fall to about 21 °C, a spread of 5.8 °C between afternoon and dawn. That makes November the 6th warmest month of the year here.
Does it rain much in Rio das Ostras in November?
November averages 192 mm of rain, spread over about 17 of the 30 days — 57 % of the month. Cloud cover averages 73 % of the sky.
Is the sea warm enough to swim in November?
The sea averages 22 °C off Rio das Ostras in November. Most people find water below 20 °C bracing and above 25 °C comfortable for a long swim; this figure is a monthly surface average, so a sheltered bay on a still afternoon can be warmer.
How long are the days in November?
Rio das Ostras averages 13 hours between sunrise and sunset in November. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.