Castelo do Piauí weather in July

In July, Castelo do Piauí sees average daytime highs of 34°C and overnight lows near 23°C, with 6 mm of rain across 1.1 wet days and about 11.7 hours of daylight. It is the 6th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 59% of the time in July, and the air most often feels humid.

Daylight stretches from about 11 h 42 min at the start of July to 11 h 48 min by month's end. Set against the rest of the year, July is Castelo do Piauí's 4th-clearest and 4th-windiest month. For the whole year in context, see Castelo do Piauí's year-round climate.

Daytime high
34°
6th warmest
Overnight low
23°
3rd coldest
Rainfall
6 mm
1.1 wet days
Daylight
11 h 42 min
6:00 AM – 5:43 PM
Cloud cover
37%
4th clearest
Wind
14 km/h
4th windiest
Solar energy
5.53 kWh/m²
Travel score
4.0
out of 10

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 34°C through the month.

A typical July day in Castelo do Piauí reaches about 34°C in the afternoon and slips back to 23°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 35°C. Set against its neighbours, July runs on par with June and about 1°C cooler than August.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13323
23323
33323
43323
53323
63323
73323
83323
93323
103323
113423
123423
133423
143423
153423
163423
173423
183423
193423
203423
213423
223423
233423
243423
253423
263423
273423
283423
293423
303423
313423

How July really feels in Castelo do Piauí

Once humidity and wind are folded in, July averages 31 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Castelo do Piauí weather by month

How July compares with the rest of the year at a glance. July is the 6th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 24°15616.512.32.8
Feb32° / 23°17917.112.22.9
Mar32° / 23°25721.8122.9
Apr32° / 23°18418.311.93.3
May32° / 23°768.811.83.9
Jun33° / 23°11211.74.2
Jul34° / 23°61.111.74.0
Aug35° / 24°10.111.83.3
Sep36° / 24°10.3122.5
Oct37° / 25°140.812.12.0
Nov37° / 25°142.612.22.1
Dec36° / 25°416.712.32.4

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 59% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 23% of July, with mostly cloudy or overcast conditions the remaining 18%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17822
27822
37822
47822
57822
68020
77921
87921
97921
107921
117921
128020
138119
148218
158218
168218
178317
188317
198317
208416
218416
228515
238515
248515
258614
268614
278614
288614
298614
308713
318812

Chance of precipitation in July

Any precipitation

Castelo do Piauí gets around 6 mm of rain over 1.1 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 3% and peaks near 5% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
15
25
34
44
54
64
74
84
94
104
114
124
134
144
154
164
174
183
193
203
213
223
233
243
252
262
272
282
292
301
311

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the humid band about 52% of days. Sticky, muggy-or-worse air turns up on roughly 19% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
111353321
211354311
311454301
411454301
511554291
611555281
711655271
821754261
921854251
1021855241
1121955231
1222055221
1322155211
1422255201
1522454191
1622554181
1732752171
1832853151
1933052141
2033251131
2133351121
2233451111
2333650101
244375091
254384981
264404881
274414870
284424770
294434660
304444660
314464550

Wind in July

Winds average 14 km/h in July.

Across July, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 11 h 42 min at the start of July to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over July. Sunrise moves from 5:59 AM to 5:59 AM, and sunset from 5:40 PM to 5:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.75:595:40
211.75:595:41
311.75:595:41
411.75:595:41
511.75:595:41
611.75:595:41
711.76:005:42
811.76:005:42
911.76:005:42
1011.76:005:42
1111.76:005:42
1211.76:005:43
1311.76:005:43
1411.76:005:43
1511.76:005:43
1611.76:005:43
1711.76:005:44
1811.76:005:44
1911.76:005:44
2011.76:005:44
2111.76:005:44
2211.76:005:44
2311.76:005:44
2411.76:005:45
2511.76:005:45
2611.76:005:45
2711.76:005:45
2811.86:005:45
2911.86:005:45
3011.86:005:45
3111.85:595:45

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.53 kWh/m².

For context, solar energy here swings from a low near 4.99 kWh/m² to a high of 6.94 kWh/m² in October across the year — July's 5.53 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.4Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.6Bright
195.6Bright
205.6Bright
215.7Bright
225.7Bright
235.7Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.9Bright
295.9Bright
305.9Bright
316.0Bright
Planning a trip in July

Hazard calendar for Castelo do Piauí

In seasonPeak

None of Castelo do Piauí's seasonal hazards are active in July. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Castelo do Piauí's monsoon runs January–April, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is July a good time to visit Castelo do Piauí?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.0
Sightseeing
2nd-best month of the year
7.6
Beach & pool
1st-best month of the year

July is a reasonable time to visit Castelo do Piauí for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Castelo do Piauí in July

From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In July, Castelo do Piauí sees daytime highs around 34°C and nights near 23°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Castelo do Piauí in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Castelo do Piauí peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 10 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeMar 15UV 15Jul 24UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec11Extreme
Location & terrain

Where is Castelo do Piauí?

Castelo do Piauí sits at 5.3°S, 41.6°W, 241 m above sea level, in Brazil. The nearest listed city is São Miguel do Tapuio, 32 km away.

Topography around Castelo do Piauí

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Castelo do Piauí.

Within 3 km, the terrain around Castelo do Piauí has only modest variations in elevation — a maximum elevation change of 82 m around an average of 249 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 300 m; within 80 km, large variations in elevation — a maximum elevation change of 790 m.

The land around Castelo do Piauí is covered by shrubs (67%) within 3 km, shrubs (63%) and trees (31%) within 16 km, and shrubs (65%) and trees (27%) within 80 km.

3 km
82 m
16 km
300 m
80 km
790 m
treesshrubsgrasslandcroplandartificial surfaces
July weather nearby: São Miguel do Tapuio 32 km · Campo Maior 88 km · Novo Oriente 89 km · Crateús 99 km · Pedro II 100 km · Altos 105 km · Quiterianópolis 111 km · Piripiri 119 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Castelo do Piauí (-5.3222°, -41.5525°, elevation 241 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).