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Average Weather in Valença do Piauí Brazil

In Valença do Piauí, the wet season is hot, oppressive, and overcast and the dry season is sweltering, windy, and partly cloudy. Over the course of the year, the temperature typically varies from 70°F to 100°F and is rarely below 67°F or above 103°F.

Based on the beach/pool score, the best time of year to visit Valença do Piauí for hot-weather activities is from early June to early September.

Climate Summary

hotswelteringhotJanFebMarAprMayJunJulAugSepOctNovDec70%70%20%20%overcastclearprecipitation: 6.3 inprecipitation: 6.3 in0.0 in0.0 inmuggy: 98%muggy: 98%9%9%drydrybeach/pool score: 7.5beach/pool score: 7.54.24.2
Click on each chart for more information.

Temperature

The hot season lasts for 2.7 months, from August 29 to November 19, with an average daily high temperature above 98°F. The hottest day of the year is October 3, with an average high of 100°F and low of 75°F.

The cool season lasts for 3.4 months, from January 19 to April 30, with an average daily high temperature below 91°F. The coldest day of the year is July 25, with an average low of 70°F and high of 95°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature

Average Hourly Temperature in Valença do PiauíJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMcomfortablewarmwarmhotsweltering
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Valle San Francisco, Nicaragua (3,330 miles away) is the far-away foreign place with temperatures most similar to Valença do Piauí (view comparison).

Clouds

In Valença do Piauí, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year in Valença do Piauí begins around May 28 and lasts for 4.5 months, ending around October 10. On July 26, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 70% of the time, and overcast or mostly cloudy 30% of the time.

The cloudier part of the year begins around October 10 and lasts for 7.5 months, ending around May 28. On March 28, the cloudiest day of the year, the sky is overcast or mostly cloudy 80% of the time, and clear, mostly clear, or partly cloudy 20% of the time.

Cloud Cover Categories

Cloud Cover Categories in Valença do PiauíclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2670%Jul 2670%Mar 2820%Mar 2820%May 2845%May 2845%Oct 1045%Oct 1045%clearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Valença do Piauí varies very significantly throughout the year.

The wetter season lasts 4.6 months, from December 13 to May 1, with a greater than 31% chance of a given day being a wet day. The chance of a wet day peaks at 61% on March 17.

The drier season lasts 7.4 months, from May 1 to December 13. The smallest chance of a wet day is 0% on August 13.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 61% on March 17.

Daily Chance of Precipitation

Daily Chance of Precipitation in Valença do PiauíwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Mar 1761%Mar 1761%Aug 130%Aug 130%Jan 142%Jan 142%May 131%May 131%rain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Valença do Piauí experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.5 months, from October 17 to June 2, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around March 19, with an average total accumulation of 6.3 inches.

The rainless period of the year lasts for 4.5 months, from June 2 to October 17. The least rain falls around August 20, with an average total accumulation of 0.0 inches.

Average Monthly Rainfall

Average Monthly Rainfall in Valença do PiauírainrainJanFebMarAprMayJunJulAugSepOctNovDec0 in2 in4 in6 in8 in10 in12 in14 inMar 196.3 inMar 196.3 inAug 200.0 inAug 200.0 inOct 170.5 inOct 170.5 inJun 20.5 inJun 20.5 in
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

The length of the day in Valença do Piauí does not vary substantially over the course of the year, staying within 29 minutes of 12 hours throughout. In 2018, the shortest day is June 21, with 11 hours, 45 minutes of daylight; the longest day is December 21, with 12 hours, 30 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in Valença do PiauíJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minSep 2212 hr, 6 minSep 2212 hr, 30 minDec 2112 hr, 30 minDec 2112 hr, 7 minMar 2012 hr, 7 minMar 2011 hr, 45 minJun 2111 hr, 45 minJun 21daydaynight
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 5:19 AM on November 13, and the latest sunrise is 40 minutes later at 5:59 AM on July 17. The earliest sunset is at 5:37 PM on May 23, and the latest sunset is 34 minutes later at 6:11 PM on January 30.

Daylight saving time (DST) is not observed in Valença do Piauí during 2018.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in Valença do PiauíJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMNov 135:19 AMNov 135:19 AM6:11 PMJan 306:11 PMJan 30May 235:37 PMMay 235:37 PM5:59 AMJul 175:59 AMJul 17daySolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2018. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Humidity

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Valença do Piauí experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 7.9 months, from November 1 to June 28, during which time the comfort level is muggy, oppressive, or miserable at least 31% of the time. The muggiest day of the year is March 28, with muggy conditions 98% of the time.

The least muggy day of the year is August 26, with muggy conditions 9% of the time.

Humidity Comfort Levels

Humidity Comfort Levels in Valença do PiauímuggymuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Aug 269%Aug 269%98%Mar 2898%Mar 28Nov 131%Nov 131%Jun 2831%Jun 2831%oppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Valença do Piauí experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.5 months, from May 28 to November 12, with average wind speeds of more than 8.5 miles per hour. The windiest day of the year is August 10, with an average hourly wind speed of 11.3 miles per hour.

The calmer time of year lasts for 6.5 months, from November 12 to May 28. The calmest day of the year is April 1, with an average hourly wind speed of 5.7 miles per hour.

Average Wind Speed

Average Wind Speed in Valença do PiauíwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mph14 mph16 mphAug 1011.3 mphAug 1011.3 mphApr 15.7 mphApr 15.7 mphMay 288.5 mphMay 288.5 mphNov 128.5 mphNov 128.5 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Valença do Piauí is from the east throughout the year.

Wind Direction

Wind Direction in Valença do PiauíJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%eastnorthwest
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is in Valença do Piauí throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Valença do Piauí for general outdoor tourist activities is from mid June to late August, with a peak score in the third week of July.

Tourism Score

Tourism Score in Valença do Piauíbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468105.25.22.92.9 precipitationprecipitationcloudscloudstourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Valença do Piauí for hot-weather activities is from early June to early September, with a peak score in the third week of July.

Beach/Pool Score

Beach/Pool Score in Valença do Piauíbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468107.57.54.24.24.54.5precipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Growing Season

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in Valença do Piauí are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Valença do PiauíJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%100%Jan 1100%Jan 1100%Jul 3100%Jul 3comfortablewarmhotsweltering
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Growing Degree Days

Growing Degree Days in Valença do PiauíJanFebMarAprMayJunJulAugSepOctNovDec0°F2,000°F4,000°F6,000°F8,000°F10,000°FJul 490°FJul 490°FAug 291,800°FAug 291,800°FJun 3011,146°FJun 3011,146°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year.

The brighter period of the year lasts for 2.3 months, from August 26 to November 5, with an average daily incident shortwave energy per square meter above 6.9 kWh. The brightest day of the year is September 29, with an average of 7.3 kWh.

The darker period of the year lasts for 4.8 months, from January 3 to May 27, with an average daily incident shortwave energy per square meter below 5.6 kWh. The darkest day of the year is April 18, with an average of 5.2 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in Valença do PiauíbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWhSep 297.3 kWhSep 297.3 kWhApr 185.2 kWhApr 185.2 kWhJan 35.6 kWhJan 35.6 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Valença do Piauí are -6.407 deg latitude, -41.746 deg longitude, and 1,119 ft elevation.

The topography within 2 miles of Valença do Piauí contains only modest variations in elevation, with a maximum elevation change of 358 feet and an average elevation above sea level of 1,103 feet. Within 10 miles contains only modest variations in elevation (1,050 feet). Within 50 miles contains very significant variations in elevation (2,001 feet).

The area within 2 miles of Valença do Piauí is covered by shrubs (40%), trees (33%), and grassland (21%), within 10 miles by trees (51%) and shrubs (34%), and within 50 miles by trees (42%) and shrubs (40%).

Data Sources

This report illustrates the typical weather in Valença do Piauí, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There is only a single weather station, Teresina Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Valença do Piauí.

At a distance of 192 kilometers from Valença do Piauí, further than our threshold of 150 kilometers, this station is deemed insufficiently nearby to be relied upon as our primary source for temperature and dew point records. Consequently, the station records are blended with interpolated values from NASA's MERRA-2 satellite-era reanalysis , and both are corrected for elevation differences according to the International Standard Atmosphere .

The weight assigned to the MERRA-2 value depends on the distance from Valença do Piauí to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 45%, making the weight assigned to the weather station 55%.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.