São João da Barra, Brazil Climate
The warmest month is February, with an average high of 31°C; the coldest is July, with an average low of 17°C. A normal year brings 1104 mm of precipitation.
Temperature through the year
The normal daily high and low and the record for every date at Campos, since 1973. The line marks today.
- Normal low
- Normal high
- Record high
- Record low
Normals for Sep 30
- Normal high
- 29°C
- Normal low
- 19°C
- Record high
- 36°Cin 1981
- Record low
- 7°Cin 2016
- Chance of a wet day
- 41%
- Daylight
- 12 h 17 min
Month by month
Averages for 1991-2020. Wet days have at least 1 mm of precipitation in the reanalysis. Each month links to its own page.
| Month | Avg high | Avg low | Record high | Record low | Precipitation | Wet days |
|---|---|---|---|---|---|---|
| January | 31°C | 23°C | 39°C (1984) | 18°C (1979) | 158 mm | 17.5 |
| February | 31°C | 23°C | 39°C (2016) | 19°C (1979) | 95 mm | 13.7 |
| March | 30°C | 23°C | 39°C (1983) | 18°C (1976) | 128 mm | 17.8 |
| April | 29°C | 21°C | 38°C (2023) | 8°C (2016) | 68 mm | 13.4 |
| May | 28°C | 19°C | 36°C (1986) | 7°C (2016) | 49 mm | 9.5 |
| June | 27°C | 18°C | 33°C (2016) | 6°C (2016) | 28 mm | 6.0 |
| July | 27°C | 17°C | 36°C (2016) | 6°C (2016) | 24 mm | 5.9 |
| August | 28°C | 18°C | 36°C (1977) | 7°C (2016) | 26 mm | 6.2 |
| September | 29°C | 19°C | 38°C (1983) | 7°C (2016) | 57 mm | 9.7 |
| October | 30°C | 20°C | 38°C (1982) | 9°C (2016) | 91 mm | 13.8 |
| November | 30°C | 21°C | 39°C (1986) | 15°C (2022) | 175 mm | 19.9 |
| December | 30°C | 22°C | 39°C (1979) | 16°C (2018) | 205 mm | 21.0 |
| Year | 29°C | 20°C | 1104 mm | 154 |
Precipitation
Rain and melted snow together. The chance of a wet day is the share of days with at least 1 mm of precipitation in the reanalysis.
1104 mm in a normal year, most in December.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around São João da Barra.
The muggiest month is January, when 100 percent of days are muggy or worse, with a mean dew point of 18°C or more.
| Month | Dew point | Humidity | Dry | Comfortable | Humid | Muggy | Oppressive | Miserable |
|---|---|---|---|---|---|---|---|---|
| January | 22°C | 80% | 0% | 0% | 1% | 22% | 73% | 5% |
| February | 22°C | 79% | 0% | 0% | 1% | 20% | 76% | 3% |
| March | 22°C | 81% | 0% | 0% | 1% | 20% | 77% | 2% |
| April | 21°C | 80% | 0% | 1% | 13% | 39% | 47% | 0% |
| May | 18°C | 78% | 0% | 9% | 37% | 47% | 6% | 0% |
| June | 17°C | 78% | 2% | 17% | 50% | 30% | 0% | 0% |
| July | 16°C | 75% | 4% | 27% | 57% | 12% | 0% | 0% |
| August | 16°C | 72% | 5% | 32% | 52% | 11% | 0% | 0% |
| September | 17°C | 71% | 4% | 19% | 49% | 27% | 1% | 0% |
| October | 19°C | 73% | 1% | 8% | 34% | 49% | 8% | 0% |
| November | 20°C | 78% | 0% | 3% | 13% | 49% | 35% | 0% |
| December | 22°C | 81% | 0% | 0% | 3% | 25% | 69% | 2% |
Comfort is judged by the day's mean dew point: dry below 13°C, comfortable to 16°C, humid to 18°C, muggy to 21°C, oppressive to 24°C, miserable above.
Clouds
Average share of the sky covered, from satellite (CERES and GEWEX SRB) by way of NASA POWER, 1991-2020.
The clearest month is August, with the sky 44 percent covered on average; the cloudiest is November, at 72 percent.
Wind
The mean wind speed over the whole day, from the MERRA-2 reanalysis by way of NASA POWER. Gusts run well above it.
The windiest month is September, averaging 17.3 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Dec 18, with 13 h 28 min of daylight; the shortest is Jun 20, with 10 h 48 min.
- Day length
Solar energy
Average daily sunshine reaching the ground on a flat surface, in kilowatt-hours per square meter, clouds included.
Month pages
The weather in São João da Barra in each month, day by day.
What this means
A normal is the average of the thirty years 1991 to 2020, the period the World Meteorological Organization and NOAA use for comparison. It is an average, not a forecast: most days depart from it, and some by a long way.
A record is the highest or lowest value on the date in every year the station has reported, back to 1973. It rests on one station, so a neighbor a few miles away can hold different ones.
Cloud, humidity, wind and sunshine come from a reanalysis: a weather model run over the past with every observation fed in, averaged over a grid cell about 50 km across. It is consistent everywhere on Earth; it smooths local detail such as a lake shore or a valley.
More for this place
Nearby
Sources
Records: NOAA GHCN-Daily, station BRM00083698, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-30. Sun and moon: computed with the NOAA solar equations and Meeus.