Current Conditions

Castelo do Piauí, Piauí

80°F27°C

Hot

Wind

N 5 mph7 km/h

Humidity

63%

Cloud Cover

62%

As of Wednesday, September 23, 2026 at 4:16 AM GMT-3

Today's Outlook

Day

Partly cloudy and hot, with a high of 100°F38°C and morning low of 78°F25°C. Breezy from the E at 5 to 9 mph9 to 15 km/h. Heat risk in the afternoon.

Night

Mostly cloudy, with a low around 80°F27°C. Light wind from the NNW around 4 mph7 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Hot	High 100°F38°C	Low 78°F25°C	Precip 0 in0 mm—	Cloud 46%	Wind ENE 5 mph8 km/h	Wednesday: Partly cloudy and hot, with a high of 100°F38°C and morning low of 78°F25°C. Breezy from the E at 5 to 9 mph9 to 15 km/h. Heat risk in the afternoon. Wednesday Night: Mostly cloudy, with a low around 80°F27°C. Light wind from the NNW around 4 mph7 km/h.
Hot	High 101°F38°C	Low 78°F26°C	Precip 0 in0 mm—	Cloud 26%	Wind ENE 7 mph12 km/h	Thursday: Mostly clear and hot, with a high of 101°F38°C and morning low of 78°F26°C. Breezy from the E at 8 to 11 mph13 to 18 km/h. Heat risk in the afternoon. Thursday Night: Partly cloudy, with a low around 80°F27°C. Breezy from the NNE at 6 to 8 mph10 to 14 km/h.
Hot	High 98°F37°C	Low 78°F26°C	Precip 0 in0.1 mm3%	Cloud 38%	Wind ENE 8 mph12 km/h	Friday: Partly cloudy and hot, with a high of 98°F37°C and morning low of 78°F26°C. Breezy from the E at 9 to 11 mph15 to 18 km/h. Heat risk in the afternoon. Friday Night: Partly cloudy, with a low around 81°F27°C. Breezy from the NE at 6 to 7 mph10 to 12 km/h.
Hot	High 99°F37°C	Low 78°F25°C	Precip 0 in0 mm—	Cloud 46%	Wind E 7 mph11 km/h	Saturday: Partly cloudy and hot, with a high of 99°F37°C and morning low of 78°F25°C. Breezy from the ESE at 9 to 11 mph14 to 18 km/h. Heat risk in the afternoon. Saturday Night: Mostly cloudy, with a low around 80°F27°C. Light wind from the ENE around 5 mph9 km/h.
Hot	High 99°F37°C	Low 78°F26°C	Precip 0.01 in0.2 mm4%	Cloud 40%	Wind E 8 mph12 km/h	Sunday: Partly cloudy and hot, with a high of 99°F37°C and morning low of 78°F26°C. Breezy from the E at 9 to 12 mph15 to 19 km/h. Heat risk in the afternoon. Sunday Night: Mostly cloudy, with a low around 82°F28°C. Breezy from the ENE at 6 to 8 mph9 to 12 km/h.
Hot	High 97°F36°C	Low 78°F25°C	Precip 0 in0.1 mm3%	Cloud 37%	Wind E 8 mph13 km/h	Monday: Partly cloudy and hot, with a high of 97°F36°C and morning low of 78°F25°C. Breezy from the E at 9 to 12 mph15 to 20 km/h. Heat risk in the afternoon. Monday Night: Partly cloudy, with a low around 81°F27°C. Breezy from the ENE at 6 to 7 mph10 to 12 km/h.
Hot	High 98°F37°C	Low 77°F25°C	Precip 0 in0 mm—	Cloud 23%	Wind E 8 mph13 km/h	Tuesday: Mostly clear and hot, with a high of 98°F37°C and morning low of 77°F25°C. Breezy from the E at 9 to 12 mph15 to 20 km/h. Heat risk in the afternoon. Tuesday Night: Mostly clear, with a low around 79°F26°C. Breezy from the ENE at 7 mph11 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 23	100°F38°C	78°F25°C	0 in0 mm· —	46%	Hot	ENE 5 mph8 km/h
DayPartly cloudy and hot, with a high of 100°F38°C and morning low of 78°F25°C. Breezy from the E at 5 to 9 mph9 to 15 km/h. Heat risk in the afternoon. NightMostly cloudy, with a low around 80°F27°C. Light wind from the NNW around 4 mph7 km/h.
	ThursdaySep 24	101°F38°C	78°F26°C	0 in0 mm· —	26%	Hot	ENE 7 mph12 km/h
DayMostly clear and hot, with a high of 101°F38°C and morning low of 78°F26°C. Breezy from the E at 8 to 11 mph13 to 18 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 80°F27°C. Breezy from the NNE at 6 to 8 mph10 to 14 km/h.
	FridaySep 25	98°F37°C	78°F26°C	0 in0.1 mm· 3%	38%	Hot	ENE 8 mph12 km/h
DayPartly cloudy and hot, with a high of 98°F37°C and morning low of 78°F26°C. Breezy from the E at 9 to 11 mph15 to 18 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 81°F27°C. Breezy from the NE at 6 to 7 mph10 to 12 km/h.
	SaturdaySep 26	99°F37°C	78°F25°C	0 in0 mm· —	46%	Hot	E 7 mph11 km/h
DayPartly cloudy and hot, with a high of 99°F37°C and morning low of 78°F25°C. Breezy from the ESE at 9 to 11 mph14 to 18 km/h. Heat risk in the afternoon. NightMostly cloudy, with a low around 80°F27°C. Light wind from the ENE around 5 mph9 km/h.
	SundaySep 27	99°F37°C	78°F26°C	0.01 in0.2 mm· 4%	40%	Hot	E 8 mph12 km/h
DayPartly cloudy and hot, with a high of 99°F37°C and morning low of 78°F26°C. Breezy from the E at 9 to 12 mph15 to 19 km/h. Heat risk in the afternoon. NightMostly cloudy, with a low around 82°F28°C. Breezy from the ENE at 6 to 8 mph9 to 12 km/h.
	MondaySep 28	97°F36°C	78°F25°C	0 in0.1 mm· 3%	37%	Hot	E 8 mph13 km/h
DayPartly cloudy and hot, with a high of 97°F36°C and morning low of 78°F25°C. Breezy from the E at 9 to 12 mph15 to 20 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 81°F27°C. Breezy from the ENE at 6 to 7 mph10 to 12 km/h.
	TuesdaySep 29	98°F37°C	77°F25°C	0 in0 mm· —	23%	Hot	E 8 mph13 km/h
DayMostly clear and hot, with a high of 98°F37°C and morning low of 77°F25°C. Breezy from the E at 9 to 12 mph15 to 20 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 79°F26°C. Breezy from the ENE at 7 mph11 km/h.
	WednesdaySep 30	99°F37°C	77°F25°C	0 in0 mm· —	25%	Hot	E 9 mph14 km/h
DayMostly clear and hot, with a high of 99°F37°C and morning low of 77°F25°C. Breezy from the E at 10 to 13 mph16 to 21 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 80°F27°C. Breezy from the ENE at 7 to 9 mph12 to 14 km/h.
	ThursdayOct 1	100°F38°C	77°F25°C	0 in0 mm· —	17%	Hot	ENE 10 mph16 km/h
DayMostly clear and hot, with a high of 100°F38°C and morning low of 77°F25°C. Breezy from the E at 11 to 14 mph18 to 22 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 79°F26°C. Breezy from the ENE at 9 to 11 mph15 to 18 km/h.
	FridayOct 2	98°F37°C	76°F25°C	0 in0 mm· —	23%	Hot	ENE 9 mph15 km/h
DayPartly cloudy and hot, with a high of 98°F37°C and morning low of 76°F25°C. Breezy from the E at 10 to 13 mph16 to 21 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 78°F26°C. Breezy from the ENE at 8 to 10 mph13 to 16 km/h.
	SaturdayOct 3	98°F36°C	77°F25°C	0 in0 mm· —	34%	Hot	E 9 mph15 km/h
DayPartly cloudy and hot, with a high of 98°F36°C and morning low of 77°F25°C. Breezy from the E at 11 to 13 mph17 to 21 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 79°F26°C. Breezy from the ENE at 8 to 9 mph13 to 14 km/h.
	SundayOct 4	98°F37°C	77°F25°C	0 in0 mm· —	35%	Hot	E 10 mph16 km/h
DayPartly cloudy and hot, with a high of 98°F37°C and morning low of 77°F25°C. Breezy from the E at 11 to 14 mph18 to 22 km/h. Heat risk in the afternoon. NightPartly cloudy, with a low around 79°F26°C. Breezy from the ENE at 8 to 10 mph13 to 16 km/h.
	MondayOct 5	99°F37°C	76°F24°C	0 in0 mm· —	21%	Hot	E 10 mph16 km/h
DayMostly clear and hot, with a high of 99°F37°C and morning low of 76°F24°C. Breezy from the E at 11 to 14 mph18 to 23 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 78°F26°C. Breezy from the ENE at 8 to 11 mph14 to 18 km/h.
	TuesdayOct 6	99°F37°C	76°F24°C	0 in0 mm· —	16%	Hot	E 10 mph16 km/h
DayMostly clear and hot, with a high of 99°F37°C and morning low of 76°F24°C. Breezy from the E at 12 to 15 mph19 to 23 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 78°F26°C. Breezy from the ENE at 8 to 10 mph13 to 17 km/h.
	WednesdayOct 7	99°F37°C	77°F25°C	0 in0 mm· —	16%	Hot	E 10 mph16 km/h
DayMostly clear and hot, with a high of 99°F37°C and morning low of 77°F25°C. Breezy from the E at 12 to 14 mph19 to 23 km/h. Heat risk in the afternoon. NightMostly clear, with a low around 79°F26°C. Breezy from the ENE at 8 to 10 mph13 to 17 km/h.

Nearby Cities

São Miguel do Tapuio20 mi32 km Campo Maior54 mi88 km Novo Oriente56 mi89 km Crateús62 mi99 km Pedro II62 mi100 km Altos65 mi105 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 5.3222°S, 41.5525°W·Elevation: 241m·Timezone: America/Fortaleza·Population: 19,715