Castanhal weather in July

In July, Castanhal sees average daytime highs of 32°C and overnight lows near 22°C, with 91 mm of rain across 18.1 wet days and about 11.9 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 38% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of July to 11 h 54 min by month's end. Set against the rest of the year, July is Castanhal's 3rd-clearest and 7th-windiest month. For the whole year in context, see Castanhal's year-round climate.

Daytime high
32°
6th warmest
Overnight low
22°
1st coldest
Rainfall
91 mm
18.1 wet days
Daylight
11 h 54 min
6:19 AM – 6:15 PM
Cloud cover
50%
3rd clearest
Wind
7 km/h
7th windiest
Solar energy
5.23 kWh/m²
Travel score
3.5
out of 10

Castanhal is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical July day in Castanhal reaches about 32°C in the afternoon and slips back to 22°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 33°C. Set against its neighbours, July runs on par with June and on par with August.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13222
23222
33222
43222
53222
63222
73222
83222
93222
103222
113222
123222
133222
143222
153222
163222
173222
183222
193222
203222
213222
223222
233222
243222
253222
263222
273222
283222
293222
303222
313222

How July really feels in Castanhal

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.

Castanhal weather by month

How July compares with the rest of the year at a glance. July is the 6th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°26927.112.12.6
Feb30° / 23°35426.9122.5
Mar30° / 23°45630.5122.5
Apr30° / 23°42729.6122.5
May31° / 23°27827.711.92.7
Jun31° / 23°12021.411.93.1
Jul32° / 22°9118.111.93.5
Aug32° / 23°5113123.6
Sep33° / 23°348.8123.6
Oct34° / 23°348.1123.4
Nov33° / 24°498.812.13.3
Dec33° / 24°11817.412.13.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 35% of July, with mostly cloudy or overcast conditions the remaining 27%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17030
27030
37030
46931
56931
66931
76931
87030
97030
107030
117030
127030
137030
147129
157129
167228
177327
187327
197327
207327
217525
227525
237525
247624
257723
267723
277921
287921
298020
308119
318119

Chance of precipitation in July

Any precipitation

Castanhal gets around 91 mm of rain over 18.1 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 57% and peaks near 68% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
168
267
367
467
567
666
765
865
963
1062
1161
1260
1359
1457
1556
1655
1754
1854
1953
2053
2152
2252
2352
2452
2551
2651
2750
2850
2949
3049
3148

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the oppressive band about 96% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
1946
2955
3955
4955
5955
6955
7955
8964
9964
10964
11964
12964
13964
14964
15964
16964
17964
18973
19973
20973
21973
22973
23973
24973
25982
26982
27982
28982
29982
30982
31982

Wind in July

Winds average 7 km/h in July.

Across July, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 11 h 54 min at the start of July to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over July. Sunrise moves from 6:17 AM to 6:20 AM, and sunset from 6:13 PM to 6:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:176:13
211.96:176:13
311.96:186:13
411.96:186:13
511.96:186:14
611.96:186:14
711.96:186:14
811.96:186:14
911.96:196:14
1011.96:196:14
1111.96:196:15
1211.96:196:15
1311.96:196:15
1411.96:196:15
1511.96:196:15
1611.96:196:15
1711.96:196:15
1811.96:206:15
1911.96:206:16
2011.96:206:16
2111.96:206:16
2211.96:206:16
2311.96:206:16
2411.96:206:16
2511.96:206:16
2611.96:206:16
2711.96:206:16
2811.96:206:16
2911.96:206:16
3011.96:206:16
3111.96:206:16

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.23 kWh/m².

For context, solar energy here swings from a low near 4.05 kWh/m² to a high of 6.13 kWh/m² in October across the year — July's 5.23 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.4Bright
265.4Bright
275.4Bright
285.4Bright
295.4Bright
305.5Bright
315.5Bright
Planning a trip in July

Hazard calendar for Castanhal

In seasonPeak

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

Castanhal's monsoon runs January–May, 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 Castanhal?

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

3.5
Sightseeing
3rd-best month of the year
5.5
Beach & pool
5th-best month of the year

July is a weaker month for outdoor sightseeing in Castanhal.

What to pack for Castanhal in July

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

In July, Castanhal sees daytime highs around 32°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

Sea temperature near Castanhal in July

The nearest coast averages about 29°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 53 km away) is warmest in June at about 29°C and coldest in March near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb28Tropical
Mar28Tropical
Apr29Tropical
May29Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Castanhal 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 Castanhal peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 18 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 15UV 15Jul 18UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov10Extreme
Dec11Extreme

Air quality in Castanhal in July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.

Air quality in Castanhal is worst in November — around 26 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (June, 10 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 1725 µg/m³Jun 1610 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb21Moderate
Mar21Moderate
Apr17Moderate
May11Good
Jun10Good
Jul11Good
Aug13Moderate
Sep14Moderate
Oct17Moderate
Nov26Moderate
Dec20Moderate
Location & terrain

Where is Castanhal?

Castanhal sits at 1.3°S, 47.9°W, 46 m above sea level, in Brazil. The nearest listed city is Santa Isabel do Pará, 26 km away.

Topography around Castanhal

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

Within 3 km, the terrain around Castanhal has only modest variations in elevation — a maximum elevation change of 46 m around an average of 40 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 69 m; within 80 km, only modest variations in elevation — a maximum elevation change of 96 m.

The land around Castanhal is covered by artificial surfaces (56%) and grassland (25%) within 3 km, trees (60%) and grassland (36%) within 16 km, and trees (65%) within 80 km.

3 km
46 m
16 km
69 m
80 km
96 m
treesgrasslandartificial surfaceswatermangroves
July weather nearby: Santa Isabel do Pará 26 km · Santo Antônio do Tauá 28 km · Bujaru 28 km · Benevides 36 km · Igarapé-Açu 39 km · Santa Maria do Pará 39 km · Santa Bárbara do Pará 42 km · São Domingos do Capim 46 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 Castanhal (-1.2939°, -47.9264°, elevation 46 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).