Santo Antônio do Içá weather in March

In March, Santo Antônio do Içá sees average daytime highs of 30°C and overnight lows near 24°C, with 323 mm of rain across 29.1 wet days and about 12 hours of daylight. It is the 8th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 1% of the time in March, and the air most often feels miserable.

Daylight stretches from about 12 h 06 min at the start of March to 12 hours by month's end. Set against the rest of the year, March is Santo Antônio do Içá's 11th-clearest and 1st-windiest month. For the whole year in context, see Santo Antônio do Içá's year-round climate.

Daytime high
30°
8th warmest
Overnight low
24°
11th coldest
Rainfall
323 mm
29.1 wet days
Daylight
12 hours
6:41 AM – 6:42 PM
Cloud cover
89%
11th clearest
Wind
4 km/h
1st windiest
Solar energy
4.46 kWh/m²
Travel score
2.6
out of 10

Santo Antônio do Içá 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 30°C through the month.

A typical March day in Santo Antônio do Içá reaches about 30°C in the afternoon and slips back to 24°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 33°C. Set against its neighbours, March runs on par with February and on par with April.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13024
23024
33024
43024
53024
63024
73024
83024
93024
103024
113024
123024
133024
143024
153024
163024
173024
183024
193024
203024
213024
223024
233024
243024
253024
263024
273024
283024
293024
303024
313024

How March really feels in Santo Antônio do Içá

Once humidity and wind are folded in, March 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 March is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Santo Antônio do Içá weather by month

How March compares with the rest of the year at a glance. March is the 8th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°27728.312.22.7
Feb30° / 24°27625.512.12.7
Mar30° / 24°32329.1122.6
Apr30° / 23°32628.211.92.7
May30° / 23°30128.811.92.9
Jun29° / 23°20626.111.83.2
Jul30° / 22°15424.811.83.4
Aug31° / 23°13023.311.93.3
Sep31° / 23°14323122.9
Oct31° / 24°18825.612.12.7
Nov31° / 24°21926.212.12.6
Dec31° / 24°26628.812.22.6

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 4% of March, with mostly cloudy or overcast conditions the remaining 95%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1595
2595
3595
4595
5595
6595
7595
8595
9595
10595
11595
12595
13595
14595
15595
16595
17595
18694
19694
20595
21595
22595
23595
24595
25595
26595
27595
28595
29694
30595
31595

Chance of precipitation in March

Any precipitation

Santo Antônio do Içá gets around 323 mm of rain over 29.1 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 94% and peaks near 95% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
194
294
394
494
594
694
793
893
993
1093
1193
1293
1393
1493
1593
1693
1793
1893
1994
2094
2194
2294
2395
2495
2595
2695
2795
2895
2995
3095
3194

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March lands in the miserable band about 73% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
13367
23268
33268
43169
53070
63070
72971
82971
92872
102872
112872
122773
132773
142674
152674
162575
172575
182575
192575
202575
212575
222575
232575
242575
252575
262575
272575
282575
292575
302575
312575

Wind in March

Winds average 4 km/h in March, the windiest month of the year.

Across March, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in March

DaylightNight

Daylight runs from about 12 h 06 min at the start of March to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over March. Sunrise moves from 6:43 AM to 6:37 AM, and sunset from 6:47 PM to 6:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:436:47
212.16:436:47
312.16:436:46
412.16:436:46
512.16:436:46
612.06:436:45
712.06:426:45
812.06:426:45
912.06:426:45
1012.06:426:44
1112.06:426:44
1212.06:426:44
1312.06:416:43
1412.06:416:43
1512.06:416:42
1612.06:416:42
1712.06:416:42
1812.06:406:41
1912.06:406:41
2012.06:406:41
2112.06:406:40
2212.06:396:40
2312.06:396:39
2412.06:396:39
2512.06:396:39
2612.06:396:38
2712.06:386:38
2812.06:386:37
2912.06:386:37
3012.06:386:36
3112.06:376:36

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.46 kWh/m².

For context, solar energy here swings from a low near 3.72 kWh/m² to a high of 5.19 kWh/m² in October across the year — March's 4.46 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.5Bright
94.5Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.5Bright
164.5Bright
174.5Bright
184.5Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.4Bright
244.4Bright
254.4Bright
264.4Bright
274.4Bright
284.4Bright
294.4Bright
304.3Bright
314.3Bright
Planning a trip in March

Is March a good time to visit Santo Antônio do Içá?

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

2.6
Sightseeing
10th-best month of the year
3.7
Beach & pool
12th-best month of the year

March is a weaker month for outdoor sightseeing in Santo Antônio do Içá.

What to pack for Santo Antônio do Içá in March

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

In March, Santo Antônio do Içá sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. About 29 days see rain.

light clothesrain gear

UV index in Santo Antônio do Içá in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 15 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Santo Antônio do Içá peaks around March 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 9 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 10UV 15Sep 9UV 10
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul10Very high
Aug10Very high
Sep10Very high
Oct12Extreme
Nov13Extreme
Dec12Extreme

Air quality in Santo Antônio do Içá 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 Santo Antônio do Içá is worst in August — around 18 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (June, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateAug 2118 µg/m³Jun 1310 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb15Moderate
Mar16Moderate
Apr13Moderate
May10Good
Jun9Good
Jul11Good
Aug18Moderate
Sep16Moderate
Oct13Moderate
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Santo Antônio do Içá?

Santo Antônio do Içá sits at 3.1°S, 67.9°W, 68 m above sea level, in Brazil. The nearest listed city is Tonantins, 30 km away.

LeticiaTabatingaBenjamin ConstantAtalaia do Norte

Topography around Santo Antônio do Içá

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santo Antônio do Içá.

Within 3 km, the terrain around Santo Antônio do Içá has only modest variations in elevation — a maximum elevation change of 61 m around an average of 65 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 73 m; within 80 km, only modest variations in elevation — a maximum elevation change of 92 m.

The land around Santo Antônio do Içá is covered by trees (52%) and water (38%) within 3 km, trees (82%) within 16 km, and trees (96%) within 80 km.

3 km
61 m
16 km
73 m
80 km
92 m
treesgrasslandartificial surfaceswater
March weather nearby: Tonantins 30 km · São Paulo de Olivença 108 km · Fonte Boa 215 km · Carauari 229 km · Leticia 254 km · Tabatinga 255 km · Benjamin Constant 272 km · Atalaia do Norte 287 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 Santo Antônio do Içá (-3.1022°, -67.9397°, elevation 68 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).