Valença do Piauí, Brazil Climate
The warmest month is October, with an average high of 37°C; the coldest is July, with an average low of 20°C. A normal year brings 747 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
- 37°C
- Normal low
- 22°C
- Reanalysis high
- 39°Cin 2013
- Reanalysis low
- 21°Cin 2017
- Chance of a wet day
- 4%
- 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 | 32°C | 22°C | 39°C (1992) | 18°C (2002) | 140 mm | 18.6 |
| February | 31°C | 21°C | 38°C (2013) | 19°C (2007) | 138 mm | 19.8 |
| March | 30°C | 21°C | 38°C (2013) | 18°C (2001) | 174 mm | 24.8 |
| April | 30°C | 21°C | 37°C (1998) | 18°C (1995) | 114 mm | 18.0 |
| May | 31°C | 21°C | 37°C (1998) | 16°C (2004) | 43 mm | 9.3 |
| June | 33°C | 20°C | 37°C (2012) | 16°C (2008) | 9 mm | 3.0 |
| July | 34°C | 20°C | 37°C (1998) | 16°C (2006) | 3 mm | 0.0 |
| August | 35°C | 21°C | 39°C (2013) | 17°C (2001) | 0 mm | 0.0 |
| September | 37°C | 22°C | 40°C (2020) | 18°C (2006) | 3 mm | 0.0 |
| October | 37°C | 23°C | 40°C (2012) | 20°C (1992) | 16 mm | 3.1 |
| November | 36°C | 23°C | 40°C (2015) | 20°C (2000) | 36 mm | 6.0 |
| December | 35°C | 23°C | 40°C (2019) | 18°C (2000) | 71 mm | 12.4 |
| Year | 33°C | 22°C | 747 mm | 115 |
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.
747 mm in a normal year, most in March.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around Valença do Piauí.
The muggiest month is March, when 94 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 | 19°C | 67% | 1% | 7% | 26% | 55% | 12% | 0% |
| February | 20°C | 73% | 0% | 2% | 14% | 64% | 20% | 0% |
| March | 21°C | 78% | 0% | 0% | 5% | 52% | 42% | 0% |
| April | 20°C | 77% | 0% | 0% | 9% | 52% | 39% | 0% |
| May | 19°C | 69% | 0% | 6% | 30% | 52% | 11% | 0% |
| June | 16°C | 58% | 5% | 33% | 46% | 16% | 0% | 0% |
| July | 14°C | 51% | 25% | 49% | 25% | 1% | 0% | 0% |
| August | 13°C | 43% | 54% | 41% | 5% | 0% | 0% | 0% |
| September | 13°C | 39% | 53% | 42% | 4% | 0% | 0% | 0% |
| October | 14°C | 40% | 34% | 49% | 13% | 4% | 0% | 0% |
| November | 16°C | 46% | 9% | 46% | 34% | 11% | 0% | 0% |
| December | 17°C | 53% | 2% | 24% | 48% | 24% | 1% | 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 August, with the sky 21 percent covered on average; the cloudiest is March, at 77 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 20.2 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Dec 10, with 12 h 30 min of daylight; the shortest is Jun 9, with 11 h 45 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 Valença do Piauí 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.