Portão weather in March

In March, Portão sees average daytime highs of 28°C and overnight lows near 19°C, with 128 mm of rain across 12.9 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 29°C in the first days to 27°C by the end. The sky is clear or mostly clear about 34% of the time in March, and the air most often feels muggy.

Daylight stretches from about 12 h 42 min at the start of March to 11 h 48 min by month's end. Set against the rest of the year, March is Portão's 2nd-clearest and 9th-windiest month. For the whole year in context, see Portão's year-round climate.

Daytime high
28°
4th warmest
Overnight low
19°
9th coldest
Rainfall
128 mm
12.9 wet days
Daylight
12 h 12 min
7:28 AM – 7:41 PM
Cloud cover
55%
2nd clearest
Wind
8 km/h
9th windiest
Solar energy
4.86 kWh/m²
Travel score
5.7
out of 10

Portão 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

Highs ease over the month, from about 29°C in the first days to 27°C by the end.

A typical March day in Portão reaches about 28°C in the afternoon and slips back to 19°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 32°C. Set against its neighbours, March runs about 1°C cooler than February and about 3°C warmer than April.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12920
22920
32920
42919
52919
62919
72919
82919
92919
102919
112919
122819
132819
142819
152819
162819
172819
182819
192818
202818
212818
222818
232718
242718
252718
262718
272718
282718
292718
302718
312717

Portão weather by month

How March compares with the rest of the year at a glance. March is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 20°16514.813.74.6
Feb29° / 20°14113.913.14.7
Mar28° / 19°12812.912.25.7
Apr25° / 16°1181011.36.8
May22° / 13°1209.910.56.6
Jun20° / 11°12410.210.16.1
Jul19° / 10°15510.510.36.1
Aug21° / 11°13010.510.96.5
Sep22° / 13°1601211.86.3
Oct24° / 15°19413.812.76.2
Nov27° / 17°13912.113.56.2
Dec29° / 19°14513.113.95.2

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 19% of March, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
24951
35050
45050
55149
65149
75149
85248
95248
105347
115347
125446
135446
145545
155545
165545
175545
185545
195644
205545
215545
225545
235446
245446
255347
265347
275347
285347
295347
305347
315347

Chance of precipitation in March

Any precipitation

Portão gets around 128 mm of rain over 12.9 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 42% and peaks near 49% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
149
249
348
448
547
646
746
845
944
1044
1143
1243
1342
1442
1542
1642
1741
1841
1941
2040
2140
2240
2339
2439
2539
2638
2738
2837
2936
3036
3135

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March lands in the muggy band about 41% of days. Sticky, muggy-or-worse air turns up on roughly 63% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1062036381
2062036371
3062137361
4062137351
5062138341
6062239331
7062239321
8062240311
9062340301
10062341291
11072341280
12072442270
13072443260
14182543240
15182543230
16192643210
17192643200
181102743190
192112843170
202112842160
212122942150
222122942140
233123042130
243123042130
253133042120
264133042110
274133141110
284133141100
295143140100
30514314090
31515313990

Wind in March

Winds average 8 km/h in March.

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

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in March

DaylightNight

Daylight runs from about 12 h 42 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 54 minutes over March. Sunrise moves from 7:18 AM to 7:37 AM, and sunset from 7:58 PM to 7:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.77:187:58
212.67:197:57
312.67:197:56
412.67:207:55
512.67:217:54
612.57:217:53
712.57:227:52
812.57:237:51
912.47:237:50
1012.47:247:48
1112.47:257:47
1212.37:257:46
1312.37:267:45
1412.37:277:44
1512.37:277:42
1612.27:287:41
1712.27:297:40
1812.27:297:39
1912.17:307:38
2012.17:307:36
2112.17:317:35
2212.07:327:34
2312.07:327:33
2412.07:337:31
2511.97:337:30
2611.97:347:29
2711.97:357:28
2811.97:357:27
2911.87:367:25
3011.87:367:24
3111.87:377:23

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.86 kWh/m².

For context, solar energy here swings from a low near 2.39 kWh/m² to a high of 6.47 kWh/m² in December across the year — March's 4.86 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.1Bright
95.1Bright
105.1Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
154.9Bright
164.9Bright
174.8Bright
184.8Bright
194.8Bright
204.7Bright
214.7Bright
224.7Bright
234.6Bright
244.6Bright
254.5Bright
264.5Bright
274.5Bright
284.4Bright
294.4Bright
304.4Bright
314.3Bright
Planning a trip in March

Is March a good time to visit Portão?

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

5.7
Sightseeing
9th-best month of the year
6.4
Beach & pool
2nd-best month of the year

March is a reasonable time to visit Portão for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Portão in March

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

In March, Portão sees daytime highs around 28°C and nights near 19°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in Portão in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March 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 Portão peaks around January 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 16UV 13Jun 20UV 4
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar10Very high
Apr8Very high
May5Moderate
Jun4Moderate
Jul4Moderate
Aug5High
Sep8Very high
Oct8Very high
Nov12Extreme
Dec13Extreme

Air quality in Portão 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 Portão is worst in August — around 27 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateAug 1327 µg/m³Dec 2213 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar15Moderate
Apr18Moderate
May21Moderate
Jun23Moderate
Jul25Moderate
Aug27Moderate
Sep23Moderate
Oct16Moderate
Nov15Moderate
Dec13Moderate
Location & terrain

Where is Portão?

Portão sits at 29.7°S, 51.2°W, 49 m above sea level, in Brazil. The nearest listed city is Estância Velha, 9.0 km away.

Topography around Portão

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

Within 3 km, the terrain around Portão has only modest variations in elevation — a maximum elevation change of 120 m around an average of 47 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 449 m; within 80 km, large variations in elevation — a maximum elevation change of 986 m.

The land around Portão is covered by trees (42%) and grassland (34%) within 3 km, trees (52%) and grassland (25%) within 16 km, and trees (57%) and grassland (22%) within 80 km.

3 km
120 m
16 km
449 m
80 km
986 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
March weather nearby: Estância Velha 9.0 km · Novo Hamburgo 11 km · São Leopoldo 11 km · Ivoti 15 km · Sapucaia do Sul 16 km · Nova Santa Rita 17 km · São Sebastião do Caí 18 km · Campo Bom 18 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 Portão (-29.7017°, -51.2419°, elevation 49 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).