São Mateus do Maranhão weather in April

In April, São Mateus do Maranhão sees average daytime highs of 31°C and overnight lows near 24°C, with 277 mm of rain across 27.1 wet days and about 11.9 hours of daylight. It is the 11th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 4% of the time in April, and the air most often feels miserable.

Daylight stretches from about 12 hours at the start of April to 11 h 54 min by month's end. Set against the rest of the year, April is São Mateus do Maranhão's 10th-clearest and 11th-windiest month. For the whole year in context, see São Mateus do Maranhão's year-round climate.

Daytime high: 31°; 11th warmest
Overnight low: 24°; 7th coldest
Rainfall: 277 mm; 27.1 wet days
Daylight: 11 h 54 min; 6:01 AM – 5:55 PM
Cloud cover: 81%; 10th clearest
Wind: 5 km/h; 11th windiest
Solar energy: 4.39 kWh/m²
Travel score: 2.6; out of 10

São Mateus do Maranhão is settlement in Brazil.

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

← March São Mateus do Maranhão year-round climate May →Best places to visit in April

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical April day in São Mateus do Maranhão reaches about 31°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 29°C and 33°C. Set against its neighbours, April runs on par with March and on par with May.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31
Avg low (°C)	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24	24

	Avg high (°C)	Avg low (°C)
1	31	24
2	31	24
3	31	24
4	31	24
5	31	24
6	31	24
7	31	24
8	31	24
9	31	24
10	31	24
11	31	24
12	31	24
13	31	24
14	31	24
15	31	24
16	31	24
17	31	24
18	31	24
19	31	24
20	31	24
21	31	24
22	31	24
23	31	24
24	31	24
25	31	24
26	31	24
27	31	24
28	31	24
29	31	24
30	31	24

How April really feels in São Mateus do Maranhão

Once humidity and wind are folded in, April averages 30 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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in April is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

São Mateus do Maranhão weather by month

How April compares with the rest of the year at a glance. April is the 11th-warmest and 2nd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	32° / 24°	242	24.3	12.2	2.6
Feb	31° / 24°	263	25	12.1	2.5
Mar	31° / 24°	312	28.6	12	2.5
Apr	31° / 24°	277	27.1	11.9	2.6
May	31° / 24°	134	19.2	11.8	3.4
Jun	32° / 23°	37	7.6	11.8	4.4
Jul	33° / 23°	18	3.6	11.8	4.3
Aug	34° / 24°	5	1.2	11.9	3.7
Sep	35° / 25°	6	1.1	12	3.0
Oct	36° / 25°	13	3.1	12.1	2.6
Nov	35° / 25°	44	6.8	12.2	2.6
Dec	34° / 25°	113	14.3	12.2	2.6

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 12% of April, with mostly cloudy or overcast conditions the remaining 84%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	9	10	10	10	11	11	11	12	13	13	14	14	14	15	15	15	16	17	17	18	18	18	19	19	19	20	20	22	22	23
Cloudier (%)	91	90	90	90	89	89	89	88	87	87	86	86	86	85	85	85	84	83	83	82	82	82	81	81	81	80	80	78	78	77

	Clearer (%)	Cloudier (%)
1	9	91
2	10	90
3	10	90
4	10	90
5	11	89
6	11	89
7	11	89
8	12	88
9	13	87
10	13	87
11	14	86
12	14	86
13	14	86
14	15	85
15	15	85
16	15	85
17	16	84
18	17	83
19	17	83
20	18	82
21	18	82
22	18	82
23	19	81
24	19	81
25	19	81
26	20	80
27	20	80
28	22	78
29	22	78
30	23	77

Chance of precipitation in April

Any precipitation

São Mateus do Maranhão gets around 277 mm of rain over 27.1 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 90% and peaks near 96% on the wettest days. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	96	96	95	95	95	95	94	94	94	93	93	92	92	92	91	91	90	89	89	88	88	87	87	86	85	84	83	82	81	80

	Rain chance (%)
1	96
2	96
3	95
4	95
5	95
6	95
7	94
8	94
9	94
10	93
11	93
12	92
13	92
14	92
15	91
16	91
17	90
18	89
19	89
20	88
21	88
22	87
23	87
24	86
25	85
26	84
27	83
28	82
29	81
30	80

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the miserable band about 67% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Oppressive (%)	41	40	39	38	38	37	37	37	36	36	35	35	34	34	33	33	32	32	31	31	30	30	30	29	29	29	29	29	29	29
Miserable (%)	59	60	61	62	62	63	63	63	64	64	65	65	66	66	67	67	68	68	69	69	70	70	70	71	71	71	71	71	71	71

	Oppressive (%)	Miserable (%)
1	41	59
2	40	60
3	39	61
4	38	62
5	38	62
6	37	63
7	37	63
8	37	63
9	36	64
10	36	64
11	35	65
12	35	65
13	34	66
14	34	66
15	33	67
16	33	67
17	32	68
18	32	68
19	31	69
20	31	69
21	30	70
22	30	70
23	30	70
24	29	71
25	29	71
26	29	71
27	29	71
28	29	71
29	29	71
30	29	71

Wind in April

Winds average 5 km/h in April.

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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	6	6	6	6	6
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	5	calm
2	5	calm
3	5	calm
4	5	calm
5	5	calm
6	5	calm
7	5	calm
8	5	calm
9	5	calm
10	5	calm
11	5	calm
12	5	calm
13	5	calm
14	5	calm
15	5	calm
16	5	calm
17	5	calm
18	5	calm
19	5	calm
20	5	calm
21	5	calm
22	5	calm
23	5	calm
24	5	calm
25	5	calm
26	6	calm
27	6	calm
28	6	calm
29	6	calm
30	6	calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 hours at the start of April to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over April. Sunrise moves from 6:04 AM to 5:59 AM, and sunset from 6:02 PM to 5:51 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	12.0	12.0	12.0	12.0	12.0	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9	11.9
Sunrise (AM)	6:04	6:03	6:03	6:03	6:03	6:03	6:02	6:02	6:02	6:02	6:02	6:01	6:01	6:01	6:01	6:01	6:01	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	6:00	5:59	5:59	5:59
Sunset (PM)	6:02	6:01	6:01	6:00	6:00	5:59	5:59	5:59	5:58	5:58	5:57	5:57	5:57	5:56	5:56	5:55	5:55	5:55	5:54	5:54	5:54	5:53	5:53	5:53	5:52	5:52	5:52	5:52	5:51	5:51

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.0	6:04	6:02
2	12.0	6:03	6:01
3	12.0	6:03	6:01
4	12.0	6:03	6:00
5	12.0	6:03	6:00
6	11.9	6:03	5:59
7	11.9	6:02	5:59
8	11.9	6:02	5:59
9	11.9	6:02	5:58
10	11.9	6:02	5:58
11	11.9	6:02	5:57
12	11.9	6:01	5:57
13	11.9	6:01	5:57
14	11.9	6:01	5:56
15	11.9	6:01	5:56
16	11.9	6:01	5:55
17	11.9	6:01	5:55
18	11.9	6:00	5:55
19	11.9	6:00	5:54
20	11.9	6:00	5:54
21	11.9	6:00	5:54
22	11.9	6:00	5:53
23	11.9	6:00	5:53
24	11.9	6:00	5:53
25	11.9	6:00	5:52
26	11.9	6:00	5:52
27	11.9	6:00	5:52
28	11.9	5:59	5:52
29	11.9	5:59	5:51
30	11.9	5:59	5:51

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.39 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.39 kWh/m² to a high of 6.36 kWh/m² in October across the year — April's 4.39 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4	4.4
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.4	Bright
2	4.4	Bright
3	4.4	Bright
4	4.4	Bright
5	4.4	Bright
6	4.4	Bright
7	4.4	Bright
8	4.4	Bright
9	4.4	Bright
10	4.4	Bright
11	4.4	Bright
12	4.4	Bright
13	4.4	Bright
14	4.4	Bright
15	4.4	Bright
16	4.4	Bright
17	4.4	Bright
18	4.4	Bright
19	4.4	Bright
20	4.4	Bright
21	4.4	Bright
22	4.4	Bright
23	4.4	Bright
24	4.4	Bright
25	4.4	Bright
26	4.4	Bright
27	4.4	Bright
28	4.4	Bright
29	4.4	Bright
30	4.4	Bright

Planning a trip in April

Hazard calendar for São Mateus do Maranhão

In seasonPeak

In April, São Mateus do Maranhão sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

São Mateus do Maranhão's monsoon runs January–April, when most of the year's rain falls.

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is April a good time to visit São Mateus do Maranhão?

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

2.6

Sightseeing

6th-best month of the year

3.8

Beach & pool

10th-best month of the year

April is a weaker month for outdoor sightseeing in São Mateus do Maranhão.

What to pack for São Mateus do Maranhão in April

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

In April, São Mateus do Maranhão sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. About 27 days see rain.

light clothesrain gear

UV index in São Mateus do Maranhão in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in São Mateus do Maranhão peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 10 (very high).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	13	14	15	14	11	10	10	10	12	12	11	11
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	13	Extreme
Feb	14	Extreme
Mar	15	Extreme
Apr	14	Extreme
May	11	Extreme
Jun	10	Extreme
Jul	10	Very high
Aug	10	Very high
Sep	12	Extreme
Oct	12	Extreme
Nov	11	Extreme
Dec	11	Extreme

Air quality in São Mateus do Maranhão in April

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in São Mateus do Maranhão is worst in October — around 25 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (June, 8 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	14	16	15	13	10	8	9	12	16	25	23	17
Level	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Good	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	14	Moderate
Feb	16	Moderate
Mar	15	Moderate
Apr	13	Moderate
May	10	Good
Jun	8	Good
Jul	9	Good
Aug	12	Good
Sep	16	Moderate
Oct	25	Moderate
Nov	23	Moderate
Dec	17	Moderate

Location & terrain

Where is São Mateus do Maranhão?

São Mateus do Maranhão sits at 4.0°S, 44.5°W, 47 m above sea level, in Brazil. The nearest listed city is Alto Alegre do Maranhão, 19 km away.

Topography around São Mateus do Maranhão

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Mateus do Maranhão.

Within 3 km, the terrain around São Mateus do Maranhão has only modest variations in elevation — a maximum elevation change of 28 m around an average of 42 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 76 m; within 80 km, only modest variations in elevation — a maximum elevation change of 174 m.

The land around São Mateus do Maranhão is covered by grassland (44%) and trees (29%) within 3 km, grassland (50%) and trees (31%) within 16 km, and trees (47%) and grassland (46%) within 80 km.

3 km

28 m

grassland 44%

16 km

76 m

grassland 50%

80 km

174 m

trees 47%

treesshrubsgrasslandcroplandartificial surfaceswaterwetland

← March São Mateus do Maranhão year-round climate May →Best places to visit in April

April weather nearby: Alto Alegre do Maranhão 19 km · Bacabal 40 km · Coroatá 40 km · Peritoró 41 km · São Luís Gonzaga do Maranhão 43 km · Pirapemas 45 km · Matões do Norte 46 km · Cantanhede 47 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

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 São Mateus do Maranhão (-4.0417°, -44.475°, elevation 47 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).

	Avg high (°C)	Avg low (°C)
1	31	24
2	31	24
3	31	24
4	31	24
5	31	24
6	31	24
7	31	24
8	31	24
9	31	24
10	31	24
11	31	24
12	31	24
13	31	24
14	31	24
15	31	24
16	31	24
17	31	24
18	31	24
19	31	24
20	31	24
21	31	24
22	31	24
23	31	24
24	31	24
25	31	24
26	31	24
27	31	24
28	31	24
29	31	24
30	31	24

	Clearer (%)	Cloudier (%)
1	9	91
2	10	90
3	10	90
4	10	90
5	11	89
6	11	89
7	11	89
8	12	88
9	13	87
10	13	87
11	14	86
12	14	86
13	14	86
14	15	85
15	15	85
16	15	85
17	16	84
18	17	83
19	17	83
20	18	82
21	18	82
22	18	82
23	19	81
24	19	81
25	19	81
26	20	80
27	20	80
28	22	78
29	22	78
30	23	77

	Rain chance (%)
1	96
2	96
3	95
4	95
5	95
6	95
7	94
8	94
9	94
10	93
11	93
12	92
13	92
14	92
15	91
16	91
17	90
18	89
19	89
20	88
21	88
22	87
23	87
24	86
25	85
26	84
27	83
28	82
29	81
30	80

	Oppressive (%)	Miserable (%)
1	41	59
2	40	60
3	39	61
4	38	62
5	38	62
6	37	63
7	37	63
8	37	63
9	36	64
10	36	64
11	35	65
12	35	65
13	34	66
14	34	66
15	33	67
16	33	67
17	32	68
18	32	68
19	31	69
20	31	69
21	30	70
22	30	70
23	30	70
24	29	71
25	29	71
26	29	71
27	29	71
28	29	71
29	29	71
30	29	71

	Avg high (°C)	Avg low (°C)
1	31	24
2	31	24
3	31	24
4	31	24
5	31	24
6	31	24
7	31	24
8	31	24
9	31	24
10	31	24
11	31	24
12	31	24
13	31	24
14	31	24
15	31	24
16	31	24
17	31	24
18	31	24
19	31	24
20	31	24
21	31	24
22	31	24
23	31	24
24	31	24
25	31	24
26	31	24
27	31	24
28	31	24
29	31	24
30	31	24

	Clearer (%)	Cloudier (%)
1	9	91
2	10	90
3	10	90
4	10	90
5	11	89
6	11	89
7	11	89
8	12	88
9	13	87
10	13	87
11	14	86
12	14	86
13	14	86
14	15	85
15	15	85
16	15	85
17	16	84
18	17	83
19	17	83
20	18	82
21	18	82
22	18	82
23	19	81
24	19	81
25	19	81
26	20	80
27	20	80
28	22	78
29	22	78
30	23	77

	Rain chance (%)
1	96
2	96
3	95
4	95
5	95
6	95
7	94
8	94
9	94
10	93
11	93
12	92
13	92
14	92
15	91
16	91
17	90
18	89
19	89
20	88
21	88
22	87
23	87
24	86
25	85
26	84
27	83
28	82
29	81
30	80

	Oppressive (%)	Miserable (%)
1	41	59
2	40	60
3	39	61
4	38	62
5	38	62
6	37	63
7	37	63
8	37	63
9	36	64
10	36	64
11	35	65
12	35	65
13	34	66
14	34	66
15	33	67
16	33	67
17	32	68
18	32	68
19	31	69
20	31	69
21	30	70
22	30	70
23	30	70
24	29	71
25	29	71
26	29	71
27	29	71
28	29	71
29	29	71
30	29	71

	Avg high (°C)	Avg low (°C)
1	31	24
2	31	24
3	31	24
4	31	24
5	31	24
6	31	24
7	31	24
8	31	24
9	31	24
10	31	24
11	31	24
12	31	24
13	31	24
14	31	24
15	31	24
16	31	24
17	31	24
18	31	24
19	31	24
20	31	24
21	31	24
22	31	24
23	31	24
24	31	24
25	31	24
26	31	24
27	31	24
28	31	24
29	31	24
30	31	24

	Clearer (%)	Cloudier (%)
1	9	91
2	10	90
3	10	90
4	10	90
5	11	89
6	11	89
7	11	89
8	12	88
9	13	87
10	13	87
11	14	86
12	14	86
13	14	86
14	15	85
15	15	85
16	15	85
17	16	84
18	17	83
19	17	83
20	18	82
21	18	82
22	18	82
23	19	81
24	19	81
25	19	81
26	20	80
27	20	80
28	22	78
29	22	78
30	23	77

	Rain chance (%)
1	96
2	96
3	95
4	95
5	95
6	95
7	94
8	94
9	94
10	93
11	93
12	92
13	92
14	92
15	91
16	91
17	90
18	89
19	89
20	88
21	88
22	87
23	87
24	86
25	85
26	84
27	83
28	82
29	81
30	80

	Oppressive (%)	Miserable (%)
1	41	59
2	40	60
3	39	61
4	38	62
5	38	62
6	37	63
7	37	63
8	37	63
9	36	64
10	36	64
11	35	65
12	35	65
13	34	66
14	34	66
15	33	67
16	33	67
17	32	68
18	32	68
19	31	69
20	31	69
21	30	70
22	30	70
23	30	70
24	29	71
25	29	71
26	29	71
27	29	71
28	29	71
29	29	71
30	29	71