Castelo weather in April

In April, Castelo sees average daytime highs of 27°C and overnight lows near 18°C, with 88 mm of rain across 13.4 wet days and about 11.5 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 24% of the time in April, and the air most often feels muggy.

Daylight stretches from about 11 h 48 min at the start of April to 11 h 18 min by month's end. Set against the rest of the year, April is Castelo's 6th-clearest and 12th-windiest month. For the whole year in context, see Castelo's year-round climate.

Daytime high
27°
5th warmest
Overnight low
18°
7th coldest
Rainfall
88 mm
13.4 wet days
Daylight
11 h 30 min
6:59 AM – 6:31 PM
Cloud cover
62%
6th clearest
Wind
5 km/h
12th windiest
Solar energy
4.34 kWh/m²
Travel score
6.0
out of 10

Castelo is human settlement in Brazil.

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical April day in Castelo reaches about 27°C in the afternoon and slips back to 18°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 30°C. Set against its neighbours, April runs about 2°C cooler than March and about 2°C warmer than May.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12719
22719
32718
42718
52718
62718
72718
82718
92718
102718
112718
122718
132718
142718
152718
162718
172718
182718
192618
202617
212617
222617
232617
242617
252617
262617
272617
282617
292617
302616

Castelo weather by month

How April compares with the rest of the year at a glance. April is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 20°14814.113.14.9
Feb29° / 20°10711.912.74.8
Mar28° / 19°15916.612.15.0
Apr27° / 18°8813.411.56.0
May25° / 16°438.6117.1
Jun24° / 14°235.510.87.8
Jul24° / 14°24610.97.8
Aug24° / 14°266.511.37.7
Sep26° / 16°589.311.96.9
Oct26° / 17°11012.312.56.1
Nov26° / 18°19117.1135.2
Dec28° / 19°2241913.24.8

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 23% of April, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24258
34159
44159
54159
64159
74060
84060
94159
104159
114258
124357
134357
144456
154456
164555
174852
184852
194852
205050
215050
225149
235248
245347
255446
265446
275446
285545
295545
305545

Chance of precipitation in April

Any precipitation

Castelo gets around 88 mm of rain over 13.4 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 43% and peaks near 50% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
150
250
350
450
550
650
750
850
949
1049
1148
1247
1346
1445
1544
1644
1743
1842
1941
2040
2139
2239
2338
2438
2537
2636
2736
2835
2934
3034

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the muggy band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 57% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
10225712
20325711
30326701
40326701
50326701
60327691
70428671
80428671
90429661
100430651
110530641
120531631
130631621
140632611
150732601
160833581
170834571
180934561
1901035541
2001037530
2101138510
2201239490
2301340460
2411441440
2511543420
2611544390
2711646370
2811747340
2911849320
3021950290

Wind in April

Winds average 5 km/h in April, the calmest month.

Across April, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
296calm
306calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 11 h 48 min at the start of April to 11 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over April. Sunrise moves from 6:55 AM to 7:04 AM, and sunset from 6:44 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:556:44
211.86:556:43
311.86:556:42
411.86:566:41
511.76:566:40
611.76:566:40
711.76:566:39
811.76:576:38
911.76:576:37
1011.66:576:36
1111.66:586:35
1211.66:586:34
1311.66:586:33
1411.66:586:32
1511.56:596:32
1611.56:596:31
1711.56:596:30
1811.57:006:29
1911.57:006:28
2011.57:006:28
2111.47:016:27
2211.47:016:26
2311.47:016:25
2411.47:026:24
2511.47:026:24
2611.37:026:23
2711.37:036:22
2811.37:036:22
2911.37:046:21
3011.37:046:20

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.34 kWh/m².

For context, solar energy here swings from a low near 3.53 kWh/m² to a high of 5.96 kWh/m² in February across the year — April's 4.34 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.6Bright
44.6Bright
54.6Bright
64.5Bright
74.5Bright
84.5Bright
94.5Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.3Bright
224.2Bright
234.2Bright
244.2Bright
254.2Bright
264.2Bright
274.2Bright
284.2Bright
294.1Bright
304.1Bright
Planning a trip in April

Hazard calendar for Castelo

In seasonPeak

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

Castelo's rainy season runs October–March, when most of the year's rain falls.

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

Is April a good time to visit Castelo?

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

6.0
Sightseeing
7th-best month of the year
6.0
Beach & pool
8th-best month of the year

April is a reasonable time to visit Castelo for sightseeing.

What to pack for Castelo in April

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

In April, Castelo sees daytime highs around 27°C and nights near 18°C. Worth packing: light clothes and rain gear. About 13 days see rain.

light clothesrain gear

Sea temperature near Castelo in April

The nearest coast averages about 25°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 66 km away) is warmest in March at about 25°C and coldest in September near 22°C.

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

20°22°24°26°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan24Warm
Feb25Warm
Mar25Warm
Apr25Warm
May25Warm
Jun23Refreshing
Jul23Refreshing
Aug23Refreshing
Sep22Refreshing
Oct23Refreshing
Nov24Refreshing
Dec24Warm

UV index in Castelo in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 peaks around February 11 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeFeb 11UV 14Jun 20UV 6
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7Very high
Jun6High
Jul7High
Aug9Very high
Sep10Very high
Oct12Extreme
Nov13Extreme
Dec14Extreme
Location & terrain

Where is Castelo?

Castelo sits at 20.6°S, 41.2°W, 129 m above sea level, in Brazil. The nearest listed city is Vargem Alta, 20 km away.

Topography around Castelo

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

Within 3 km, the terrain around Castelo has large variations in elevation — a maximum elevation change of 768 m around an average of 224 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,935 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,841 m.

The land around Castelo is covered by trees (56%) and grassland (37%) within 3 km, trees (53%) and grassland (46%) within 16 km, and trees (50%) and grassland (41%) within 80 km.

3 km
768 m
16 km
1,935 m
80 km
2,841 m
treesgrasslandartificial surfaceswaterwetland
April weather nearby: Vargem Alta 20 km · Cachoeiro de Itapemirim 28 km · Muniz Freire 28 km · Alegre 40 km · Iúna 46 km · Ibatiba 53 km · Mimoso do Sul 55 km · Piúma 55 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 (-20.6036°, -41.1847°, elevation 129 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).