Pires do Rio, Brazil Climate
The warmest month is September, with an average high of 34°C; the coldest is June, with an average low of 14°C. A normal year brings 1324 mm of precipitation.
Temperature through the year
The normal daily high and low. The line marks today.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
Normals for Sep 24
- Normal high
- 34°C
- Normal low
- 20°C
- Reanalysis high
- 40°Cin 2015
- Reanalysis low
- 11°Cin 2008
- Chance of a wet day
- 34%
- Daylight
- 12 h 08 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 | Warmest | Coldest | Precipitation | Wet days |
|---|---|---|---|---|---|---|
| January | 28°C | 20°C | 37°C (2015) | 16°C (1993) | 239 mm | 24.8 |
| February | 28°C | 20°C | 34°C (2019) | 15°C (2017) | 189 mm | 22.6 |
| March | 28°C | 20°C | 32°C (2017) | 16°C (1995) | 195 mm | 21.7 |
| April | 28°C | 18°C | 33°C (2017) | 10°C (1999) | 81 mm | 12.0 |
| May | 27°C | 16°C | 33°C (2010) | 6°C (2018) | 28 mm | 3.1 |
| June | 28°C | 14°C | 34°C (2016) | 2°C (1994) | 9 mm | 3.0 |
| July | 29°C | 14°C | 34°C (2007) | 5°C (2000) | 3 mm | 0.0 |
| August | 32°C | 16°C | 37°C (2005) | 9°C (2003) | 9 mm | 3.1 |
| September | 34°C | 19°C | 41°C (2020) | 10°C (2002) | 48 mm | 9.0 |
| October | 33°C | 20°C | 42°C (2020) | 12°C (1995) | 105 mm | 15.5 |
| November | 30°C | 20°C | 39°C (1994) | 14°C (2017) | 189 mm | 21.0 |
| December | 29°C | 20°C | 38°C (2002) | 14°C (2000) | 229 mm | 24.8 |
| Year | 30°C | 18°C | 1324 mm | 161 |
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.
1324 mm in a normal year, most in January.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around Pires do Rio.
The muggiest month is March, when 96 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 | 20°C | 81% | 0% | 0% | 8% | 78% | 13% | 0% |
| February | 20°C | 81% | 0% | 0% | 5% | 84% | 11% | 0% |
| March | 20°C | 83% | 0% | 0% | 5% | 85% | 11% | 0% |
| April | 19°C | 81% | 0% | 5% | 26% | 67% | 2% | 0% |
| May | 16°C | 76% | 11% | 29% | 46% | 15% | 0% | 0% |
| June | 13°C | 68% | 39% | 43% | 17% | 1% | 0% | 0% |
| July | 11°C | 58% | 74% | 24% | 2% | 0% | 0% | 0% |
| August | 10°C | 46% | 86% | 12% | 2% | 0% | 0% | 0% |
| September | 12°C | 46% | 56% | 18% | 20% | 6% | 0% | 0% |
| October | 16°C | 59% | 20% | 15% | 29% | 36% | 0% | 0% |
| November | 19°C | 74% | 0% | 3% | 24% | 70% | 3% | 0% |
| December | 20°C | 80% | 0% | 0% | 6% | 85% | 9% | 0% |
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 July, with the sky 23 percent covered on average; the cloudiest is December, at 81 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 August, averaging 14.0 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Dec 21, with 13 h 11 min of daylight; the shortest is Jun 18, with 11 h 05 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 Pires do Rio 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.
Where no station record is within reach, the extremes shown are the highest and lowest the reanalysis produced for the date in 1991-2020, not measured records.
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
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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.