Castro weather in March

In March, Castro sees average daytime highs of 25°C and overnight lows near 17°C, with 132 mm of rain across 18 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 18% of the time in March, and the air most often feels humid.

Daylight stretches from about 12 h 30 min at the start of March to 11 h 48 min by month's end. Set against the rest of the year, March is Castro's 7th-clearest and 10th-windiest month. For the whole year in context, see Castro's year-round climate.

Daytime high
25°
4th warmest
Overnight low
17°
10th coldest
Rainfall
132 mm
18 wet days
Daylight
12 h 12 min
7:24 AM – 7:35 PM
Cloud cover
65%
7th clearest
Wind
10 km/h
10th windiest
Solar energy
4.92 kWh/m²
Travel score
5.5
out of 10

Castro is human settlement in Brazil.

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

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 25°C through the month.

A typical March day in Castro reaches about 25°C in the afternoon and slips back to 17°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 28°C. Set against its neighbours, March runs on par with February and about 2°C warmer than April.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12617
22617
32617
42617
52617
62617
72617
82617
92617
102617
112517
122517
132517
142517
152517
162517
172517
182516
192516
202516
212516
222516
232516
242516
252516
262516
272516
282516
292516
302516
312516

Castro weather by month

How March compares with the rest of the year at a glance. March is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 17°23523.813.44.5
Feb26° / 17°1782112.94.6
Mar25° / 17°1321812.25.5
Apr23° / 15°709.611.46.9
May20° / 12°898.910.86.5
Jun19° / 11°938.410.56.5
Jul19° / 10°79710.66.8
Aug21° / 11°727.311.17.2
Sep22° / 12°12710.411.86.6
Oct23° / 14°13815.112.65.9
Nov24° / 15°13316.113.25.8
Dec26° / 17°17320.313.55.1

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 21% of March, with mostly cloudy or overcast conditions the remaining 61%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13763
23763
33763
43763
53763
63763
73763
83664
93763
103862
113862
123763
133763
143763
153862
163862
173862
183862
193961
203961
213961
224060
234060
244060
254060
264258
274258
284258
294456
304456
314456

Chance of precipitation in March

Any precipitation

Castro gets around 132 mm of rain over 18 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 58% and peaks near 70% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
170
269
368
468
567
666
766
865
965
1065
1164
1264
1364
1463
1563
1662
1760
1859
1958
2056
2155
2253
2352
2451
2549
2648
2746
2844
2943
3042
3141

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March lands in the humid band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 26% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11134343
21144342
31144441
40154440
50154539
60164638
70164737
80174835
90174834
100184933
110185032
120195130
130195229
141195228
151205326
161205425
172215423
182225422
193225421
203235420
214235419
224245418
235245417
245255416
255255416
266255415
276265315
287265215
298265214
308265214
319265213

Wind in March

Winds average 10 km/h in March.

Across March, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in March

DaylightNight

Daylight runs from about 12 h 30 min at the start of March to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over March. Sunrise moves from 7:17 AM to 7:31 AM, and sunset from 7:50 PM to 7:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.57:177:50
212.57:177:49
312.57:187:48
412.57:197:47
512.47:197:46
612.47:207:45
712.47:207:44
812.47:217:43
912.47:217:42
1012.37:227:41
1112.37:227:40
1212.37:227:39
1312.37:237:38
1412.27:237:37
1512.27:247:36
1612.27:247:35
1712.27:257:34
1812.17:257:33
1912.17:267:32
2012.17:267:31
2112.17:277:30
2212.07:277:29
2312.07:277:28
2412.07:287:27
2512.07:287:26
2611.97:297:25
2711.97:297:24
2811.97:307:22
2911.97:307:21
3011.87:307:20
3111.87:317:19

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.92 kWh/m².

For context, solar energy here swings from a low near 3.05 kWh/m² to a high of 5.87 kWh/m² in December across the year — March's 4.92 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.0Bright
135.0Bright
145.0Bright
154.9Bright
164.9Bright
174.9Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.6Bright
294.6Bright
304.6Bright
314.6Bright
Planning a trip in March

Is March a good time to visit Castro?

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

5.5
Sightseeing
9th-best month of the year
5.0
Beach & pool
3rd-best month of the year

March is a reasonable time to visit Castro for sightseeing.

What to pack for Castro in March

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

In March, Castro sees daytime highs around 25°C and nights near 17°C. Pack rain gear. Worth having: light clothes and sun protection. About 18 days see rain.

rain gearlight clothessun protection

UV index in Castro in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Castro peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeJan 19UV 15Jul 13UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug7High
Sep5High
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Castro in March

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Castro is worst in September — around 17 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (March, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1316 µg/m³Mar 136 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar6Good
Apr7Good
May8Good
Jun8Good
Jul10Good
Aug14Moderate
Sep17Moderate
Oct10Good
Nov7Good
Dec7Good
Location & terrain

Where is Castro?

Castro sits at 24.8°S, 50.0°W, 986 m above sea level, in Brazil. The nearest listed city is Piraí do Sul, 30 km away.

Topography around Castro

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

Within 3 km, the terrain around Castro has only modest variations in elevation — a maximum elevation change of 151 m around an average of 1,004 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 304 m; within 80 km, large variations in elevation — a maximum elevation change of 1,128 m.

The land around Castro is covered by trees (42%), artificial surfaces (28%) and grassland (20%) within 3 km, trees (42%) and cropland (42%) within 16 km, and trees (58%) and cropland (30%) within 80 km.

3 km
151 m
16 km
304 m
80 km
1,128 m
treesgrasslandcroplandartificial surfaceswater
March weather nearby: Piraí do Sul 30 km · Ponta Grossa 37 km · Tibagi 51 km · Jaguariaíva 68 km · Palmeira 71 km · Arapoti 73 km · Cerro Azul 76 km · Imbituva 77 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 Castro (-24.7893°, -50.0123°, elevation 986 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. 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).