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Climate and Average Weather Year Round in Teresina Piauí, Brazil

In Teresina, the wet season is hot and overcast, the dry season is sweltering and partly cloudy, and it is oppressive year round. Over the course of the year, the temperature typically varies from 74°F to 99°F and is rarely below 70°F or above 103°F.

Based on the beach/pool score, the best time of year to visit Teresina for hot-weather activities is from mid June to late August.

Climate in Teresina

hotswelteringhotJanFebMarAprMayJunJulAugSepOctNovDecNowNow68%68%16%16%overcastclearprecipitation: 10.3 inprecipitation: 10.3 in0.1 in0.1 inmuggy: 100%muggy: 100%67%67%beach/pool score: 6.8beach/pool score: 6.83.03.0
Teresina weather by month. Click on each chart for more information.

The hot season lasts for 2.6 months, from August 29 to November 17, with an average daily high temperature above 97°F. The hottest month of the year in Teresina is October, with an average high of 99°F and low of 77°F.

The cool season lasts for 4.8 months, from January 12 to June 4, with an average daily high temperature below 92°F. The coldest month of the year in Teresina is March, with an average low of 75°F and high of 90°F.

Average High and Low Temperature in Teresina

Average High and Low Temperature in TeresinahotcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°FJul 2594°FJul 2594°FSep 3099°FSep 3099°F74°F74°F76°F76°FAug 2997°FAug 2997°FNov 1797°FNov 1797°FJan 1292°FJan 1292°FJun 492°FJun 492°F75°F75°F77°F77°F76°F76°F75°F75°FNowNow
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.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 92°F91°F90°F91°F91°F92°F94°F96°F98°F99°F97°F95°F
Temp. 82°F82°F81°F82°F83°F83°F83°F85°F87°F87°F87°F85°F
Low 75°F75°F75°F75°F76°F75°F74°F74°F76°F77°F77°F77°F

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 in Teresina

Average Hourly Temperature in TeresinaJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNowNowcomfortablewarmwarmhotsweltering
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.

Ciudad Choluteca, Honduras (3,303 miles away) is the far-away foreign place with temperatures most similar to Teresina (view comparison).

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In Teresina, 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 Teresina begins around May 28 and lasts for 4.6 months, ending around October 16.

The clearest month of the year in Teresina is July, during which on average the sky is clear, mostly clear, or partly cloudy 66% of the time.

The cloudier part of the year begins around October 16 and lasts for 7.4 months, ending around May 28.

The cloudiest month of the year in Teresina is April, during which on average the sky is overcast or mostly cloudy 83% of the time.

Cloud Cover Categories in Teresina

Cloud Cover Categories in TeresinaclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2468%Jul 2468%Apr 716%Apr 716%May 2841%May 2841%Oct 1642%Oct 1642%NowNowclearmostly 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.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 78%80%82%83%68%45%34%37%44%58%70%75%
Clearer 22%20%18%17%32%55%66%63%56%42%30%25%

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

The wetter season lasts 4.6 months, from December 23 to May 10, with a greater than 39% chance of a given day being a wet day. The month with the most wet days in Teresina is March, with an average of 23.2 days with at least 0.04 inches of precipitation.

The drier season lasts 7.4 months, from May 10 to December 23. The month with the fewest wet days in Teresina is August, with an average of 0.7 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Teresina is March, with an average of 23.2 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 77% on March 20.

Daily Chance of Precipitation in Teresina

Daily Chance of Precipitation in TeresinawetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Mar 2077%Mar 2077%Aug 81%Aug 81%Dec 2339%Dec 2339%May 1039%May 1039%NowNowrain
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).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 17.5d19.3d23.2d19.4d10.1d3.1d1.2d0.7d1.6d3.3d5.3d10.4d

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. Teresina experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 8.4 months, from October 6 to June 19, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Teresina is March, with an average rainfall of 9.8 inches.

The rainless period of the year lasts for 3.6 months, from June 19 to October 6. The month with the least rain in Teresina is August, with an average rainfall of 0.1 inches.

Average Monthly Rainfall in Teresina

Average Monthly Rainfall in TeresinarainrainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 inMar 2610.3 inMar 2610.3 inAug 30.1 inAug 30.1 inOct 60.5 inOct 60.5 inJun 190.5 inJun 190.5 inNowNow
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 snowfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 6.5″8.4″9.8″8.7″3.2″0.6″0.2″0.1″0.3″0.7″1.3″3.3″

The length of the day in Teresina does not vary substantially over the course of the year, staying within 25 minutes of 12 hours throughout. In 2024, the shortest day is June 20, with 11 hours, 50 minutes of daylight; the longest day is December 21, with 12 hours, 25 minutes of daylight.

Hours of Daylight and Twilight in Teresina

Hours of Daylight and Twilight in TeresinaJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minSep 2212 hr, 6 minSep 2212 hr, 25 minDec 2112 hr, 25 minDec 2112 hr, 7 minMar 2012 hr, 7 minMar 2011 hr, 50 minJun 2011 hr, 50 minJun 20daydaynightNowNow
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.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight 12.4h12.3h12.1h12.0h11.9h11.8h11.9h12.0h12.1h12.2h12.3h12.4h

The earliest sunrise is at 5:25 AM on November 10, and the latest sunrise is 36 minutes later at 6:01 AM on July 18. The earliest sunset is at 5:43 PM on October 22, and the latest sunset is 31 minutes later at 6:14 PM on February 2.

Daylight saving time (DST) is not observed in Teresina during 2024.

Sunrise & Sunset with Twilight in Teresina

Sunrise & Sunset with Twilight in TeresinaJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMNov 105:25 AMNov 105:25 AM6:14 PMFeb 26:14 PMFeb 2Oct 225:43 PMOct 225:43 PM6:01 AMJul 186:01 AMJul 18daynightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2024. 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.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in Teresina

Solar Elevation and Azimuth in TeresinaJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AM0000101010102020202030303030404040405050505060606060707070808000001010101020202020303030304040404050505050606060607070708090NowNow
northeastsouthwest
Solar elevation and azimuth over the course of the year 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases in Teresina

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

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.

Teresina experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 10 months, from September 24 to July 24, during which time the comfort level is muggy, oppressive, or miserable at least 75% of the time. The month with the most muggy days in Teresina is March, with 31.0 days that are muggy or worse.

The month with the fewest muggy days in Teresina is August, with 21.3 days that are muggy or worse.

Humidity Comfort Levels in Teresina

Humidity Comfort Levels in TeresinamuggymuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Aug 967%Aug 967%100%Apr 7100%Apr 7Sep 2475%Sep 2475%NowNowmiserablemiserableoppressiveoppressivemuggymuggyhumidhumiddrydry
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.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 30.6d29.0d31.0d30.0d30.9d28.3d24.9d21.3d22.1d24.9d26.1d29.2d

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 Teresina experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.8 months, from June 23 to December 18, with average wind speeds of more than 3.5 miles per hour. The windiest month of the year in Teresina is October, with an average hourly wind speed of 4.3 miles per hour.

The calmer time of year lasts for 6.2 months, from December 18 to June 23. The calmest month of the year in Teresina is April, with an average hourly wind speed of 2.6 miles per hour.

Average Wind Speed in Teresina

Average Wind Speed in TeresinawindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mphOct 194.4 mphOct 194.4 mphApr 12.5 mphApr 12.5 mphJun 233.5 mphJun 233.5 mphDec 183.5 mphDec 183.5 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 2.92.82.72.62.93.43.73.94.24.34.03.5

The predominant average hourly wind direction in Teresina varies throughout the year.

The wind is most often from the north for 2.9 months, from January 1 to March 28, with a peak percentage of 49% on March 11. The wind is most often from the east for 9.1 months, from March 28 to December 31, with a peak percentage of 71% on June 19.

Wind Direction in Teresina

Wind Direction in TeresinaNEJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNoweastnorthsouthwest
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).

To characterize how pleasant the weather is in Teresina 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 Teresina for general outdoor tourist activities is from mid June to late August, with a peak score in the last week of July.

Tourism Score in Teresina

Tourism Score in Teresinabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810104.54.52.22.2NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationtourism 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 Teresina for hot-weather activities is from mid June to late August, with a peak score in the third week of July.

Beach/Pool Score in Teresina

Beach/Pool Score in Teresinabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.86.83.03.0NowNow cloudscloudsprecipitationprecipitationbeach/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.

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 Teresina 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 in Teresina

Time Spent in Various Temperature Bands and the Growing Season in TeresinaJanFebMarAprMayJunJulAugSepOctNovDec0%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 2100%Jul 2NowNowcomfortablewarmhotsweltering
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 in Teresina

Growing Degree Days in TeresinaJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F2,000°F2,000°F4,000°F4,000°F6,000°F6,000°F8,000°F8,000°F10,000°F10,000°FJul 490°FJul 490°FAug 271,800°FAug 271,800°FJun 3011,556°FJun 3011,556°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

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 2.8 months, from August 22 to November 16, with an average daily incident shortwave energy per square meter above 6.6 kWh. The brightest month of the year in Teresina is September, with an average of 7.0 kWh.

The darker period of the year lasts for 2.9 months, from February 19 to May 17, with an average daily incident shortwave energy per square meter below 5.2 kWh. The darkest month of the year in Teresina is April, with an average of 4.8 kWh.

Average Daily Incident Shortwave Solar Energy in Teresina

Average Daily Incident Shortwave Solar Energy in TeresinabrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhSep 297.1 kWhSep 297.1 kWhApr 174.7 kWhApr 174.7 kWhAug 226.6 kWhAug 226.6 kWhNov 166.6 kWhNov 166.6 kWhFeb 195.2 kWhFeb 195.2 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh) 5.35.25.04.85.15.55.96.57.07.06.66.0

For the purposes of this report, the geographical coordinates of Teresina are -5.089 deg latitude, -42.802 deg longitude, and 285 ft elevation.

The topography within 2 miles of Teresina contains only modest variations in elevation, with a maximum elevation change of 194 feet and an average elevation above sea level of 247 feet. Within 10 miles also contains only modest variations in elevation (446 feet). Within 50 miles contains only modest variations in elevation (1,280 feet).

The area within 2 miles of Teresina is covered by artificial surfaces (77%), within 10 miles by trees (38%) and shrubs (27%), and within 50 miles by trees (55%) and shrubs (25%).

This report illustrates the typical weather in Teresina, 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 Teresina.

At a distance of 4 kilometers from Teresina, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

The station records are corrected for the elevation difference between the station and Teresina according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

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.

Please review our full terms contained on our Terms of Service page.