Last updated: January 18, 2025
Piauí, Brazil, features a distinctive climate characterized by two main Köppen-Geiger classes: Aw (tropical savanna) and BSh (semi-arid). This region experiences a broad temperature range throughout the year, with a minimum of 16°C (61°F) in July, an average of 28°C (83°F), and peaks reaching as high as 41°C (105°F) in October. The interplay of these climate conditions creates a unique environment, influencing both the local ecosystems and the socio-economic activities of its inhabitants.
The temperature patterns in Piauí, Brazil, reveal notable seasonal trends marked by distinct variations. From January to March, the region maintains relatively consistent temperatures, with minimums around 19°C (66-67°F) and maximums peaking at about 40°C (105°F) in January. As the year progresses into April and May, minimum temperatures dip slightly to 16-18°C (61-65°F), while maximums remain high, continuing to flirt with the 37-39°C (99-102°F) range. The peak heat of the year is experienced in October, when temperatures reach a maximum of 41°C (105°F), following a gradual rise in average temperatures from 27°C (81°F) in the earlier months to approximately 31°C (87°F). The onset of the cooler months, particularly in July with consistent averages of 28°C (82°F), signals a brief relief, while temperatures steadily increase again toward the end of the year, reflecting a warm tropical climate punctuated by brief cooler spells.
In August, Luis Correia experiences a minimum temperature of 22°C (71°F) and peaks at 37°C (99°F) in October, while Oeiras has a slightly cooler minimum of 20°C (68°F) in August and reaches a high of 40°C (104°F) in September. Bom Jesus offers even cooler temperatures, starting at a minimum of 16°C (62°F) in July, climbing to a maximum of 40°C (104°F) in October. For detailed temperature patterns, you can explore the links: monthly temperatures in Luis Correia, monthly temperatures in Oeiras, and monthly temperatures in Bom Jesus.
Precipitation in Piauí, Brazil, demonstrates a clear seasonal pattern, with the majority of rainfall concentrated in the first half of the year. From January to March, the area experiences significant rainfall, peaking in March with 271 mm (10.7 in) accumulated over 24 days. February also contributes notably, with a total of 255 mm (10.1 in) across 22 days. These months are crucial for replenishing water supplies and supporting agricultural activities, as the region transitions from the drier months.
Entering the second half of the year, rainfall dramatically decreases, with June and July receiving only 10 mm (0.4 in) and 9 mm (0.3 in) respectively. August and September record negligible precipitation, totaling just 1 mm (0.1 in) each month. The return of some rainfall is noted in October with 14 mm (0.6 in), followed by 50 mm (2.0 in) in November and 74 mm (2.9 in) in December, though these totals remain modest compared to the earlier months. This distinct wet and dry season pattern plays a vital role in shaping the local climate and ecological dynamics.
In Piauí, Brazil, sunshine duration exhibits a pronounced seasonal trend, with the region basking in radiant sunlight particularly from late spring through early summer. January starts the year with 251 hours of sunshine, gradually increasing in February to 261 hours. However, it is during the months of March and April that the region truly begins to shine, accumulating 295 and 294 hours respectively. This upward trajectory continues, reaching its zenith in July with 333 hours, marking the peak of sunshine as the dry season deepens.
As summer progresses into October, Piauí enjoys even more brilliant sunshine, recording 354 hours, a notable high for the year. This abundance of sunlight in these months plays a crucial role in supporting local agriculture and influencing lifestyle activities. Toward the end of the year, sunshine hours slightly wane in November and December at 329 and 324 hours. Despite this decline, the overall pattern reveals that Piauí experiences a consistent increase in sunshine hours from winter toward summer, highlighting the region's warm and hospitable climate.
The UV Index in Piauí, Brazil, remains consistently high throughout the year, indicating a significant risk of harm from unprotected sun exposure. From January to April, the UV Index is remarkably high at 15 and 16, categorized as extreme, with a swift burn time of only 10 minutes. This persistent intensity underscores the necessity for protective measures during these months, as residents and visitors are susceptible to skin damage, necessitating broad awareness regarding sun safety practices.
As the year progresses into the latter months, the UV Index only slightly diminishes, with a minimum recorded value of 12 in June and July. However, even at this lower level, the exposure category remains extreme, maintaining the 10-minute burn time. The UV Index then increases again in August, peaking at 15 once more in November and December. This year-round high UV radiation serves as an important reminder for the population to remain vigilant, utilizing sun protection methods to mitigate the risks associated with heavy sun exposure in Piauí.
UV Risk Categories
In Piauí, Brazil, daylight duration remains relatively stable throughout the year, reflecting the region's tropical climate. From January to March, residents enjoy a consistent 12 hours of daylight each day, promoting a vibrant outdoor lifestyle. This pattern of extended daylight fosters agricultural activities and social interactions, as longer days provide ample opportunities for various pursuits.
As the calendar moves into April through August, daylight duration decreases slightly to 11 hours per day. This subtle shift marks the transition to the cooler months but still allows for sufficient daylight for most daily activities. Interestingly, daylight duration reverts back to 12 hours in September, remaining constant through to December. This cyclical pattern demonstrates Piauí’s unique ability to maintain a balanced exposure to daylight across different seasons, facilitating a reliable environment for both inhabitants and ecosystems alike.
Bom Jesus, Brazil, experiences a tropical climate characterized by warm temperatures and varied rainfall throughout the year. The temperature ranges from a minimum of 16°C (62°F) in July to a maximum of 40°C (104°F) in October, with average monthly highs around 27-30°C (81-86°F). Rainfall peaks from January to March, with February receiving the highest precipitation at 180 mm (7.1 in), while June to September experiences very low rainfall. The region enjoys abundant sunshine, particularly in the dry season, with July and August seeing up to 345 hours of sun. For more detailed information, visit Bom Jesus climate.
Luis Correia, Brazil, experiences a tropical climate characterized by warm temperatures and distinct wet and dry seasons. From January to March, the region sees high rainfall, with March having the peak at 308 mm (12.1 in), while June to August remains dry with minimal precipitation (below 50 mm). Temperatures range from a minimum of 22°C (72°F) to a maximum of 37°C (99°F), with July and August being the warmest months, often reaching up to 36°C (98°F). The area enjoys abundant sunshine, particularly in October and November, averaging over 340 hours per month. For more detailed information, visit Luis Correia climate.
Oeiras, Brazil experiences a tropical climate characterized by high temperatures and seasonal rainfall. January and February are the wettest months, with precipitation peaking at 217 mm, while July to September sees virtually no rainfall. Temperatures range from a mild 20°C (68°F) in June and August to highs reaching 40°C (104°F) in September and October. The region enjoys abundant sunshine, particularly in the dry months, with October delivering the highest at 354 hours. For more details, visit Oeiras climate.
Parnaiba, Brazil, experiences a tropical climate characterized by high temperatures and seasonal rainfall. January to May sees warm temperatures, with averages around 27°C to 29°C (81°F to 84°F) and significant rainfall peaking in March with 308 mm (12.1 in). The dry season from June to August features lower precipitation, particularly in August with just 3 mm (0.1 in), while temperatures remain warm, averaging 28°C (82°F) to 29°C (84°F). During the year, sunshine is abundant, especially from June to October, with October enjoying up to 357 hours of sunshine. For more details, visit Parnaiba climate.
In conclusion, Piauí, Brazil, presents a distinctive climatic profile characterized by significant seasonal variations in temperature, precipitation, sunshine duration, UV Index, and daylight hours. The region experiences a tropical savanna climate with marked wet and dry seasons, where peak temperatures and abundant sunshine coincide, particularly from late spring to early summer. The high UV Index throughout the year emphasizes the importance of sun safety, while the stable daylight duration offers a consistent environment for agricultural and recreational activities. Overall, the interplay of these climatic elements not only shapes the lifestyle of Piauí's residents but also influences the region's ecology and economy, highlighting the need for continued awareness and adaptation to these environmental dynamics.