São Mateus weather in August

In August, São Mateus sees average daytime highs of 24°C and overnight lows near 21°C, with 48 mm of rain across 11.2 wet days and about 11.4 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 51% of the time in August, and the air most often feels muggy.

Daylight stretches from about 11 h 06 min at the start of August to 11 h 36 min by month's end. Set against the rest of the year, August is São Mateus's 2nd-clearest and 6th-windiest month. For the whole year in context, see São Mateus's year-round climate.

Daytime high
24°
12th warmest
Overnight low
21°
2nd coldest
Rainfall
48 mm
11.2 wet days
Daylight
11 h 24 min
7:03 AM – 6:24 PM
Cloud cover
43%
2nd clearest
Wind
16 km/h
6th windiest
Solar energy
4.65 kWh/m²
Travel score
7.1
out of 10

São Mateus is human settlement in Brazil.

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 24°C through the month.

A typical August day in São Mateus reaches about 24°C in the afternoon and slips back to 21°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 26°C. Set against its neighbours, August runs on par with July and on par with September.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12421
22421
32421
42421
52421
62421
72421
82421
92421
102421
112421
122421
132421
142421
152421
162421
172421
182421
192421
202421
212421
222421
232421
242421
252521
262521
272521
282521
292521
302521
312521

São Mateus weather by month

How August compares with the rest of the year at a glance. August is the 12th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°10613.4135.9
Feb28° / 24°7613.912.65.4
Mar28° / 24°13618.212.15.2
Apr27° / 24°10816.911.65.6
May26° / 22°7013.211.16.4
Jun25° / 21°5211.810.96.8
Jul24° / 21°5713.2116.8
Aug24° / 21°4811.211.47.1
Sep25° / 22°5410.811.96.9
Oct26° / 23°9613.412.46.2
Nov26° / 23°18317.612.95.3
Dec27° / 24°14715.513.15.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 25% of August, with mostly cloudy or overcast conditions the remaining 24%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17723
27723
37624
47624
57624
67624
77624
87624
97624
107624
117624
127624
137525
147525
157525
167525
177624
187624
197624
207723
217723
227624
237624
247723
257723
267723
277723
287723
297624
307624
317723

Chance of precipitation in August

Any precipitation

São Mateus gets around 48 mm of rain over 11.2 wet days in August, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 36% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
236
335
434
534
634
734
834
934
1035
1135
1236
1337
1438
1539
1639
1740
1840
1940
2040
2140
2239
2339
2438
2537
2636
2735
2835
2934
3034
3133

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 58% of days. Sticky, muggy-or-worse air turns up on roughly 61% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
101031572
201031572
301031572
401131562
501131562
601131562
701131562
801231552
911231533
1011231533
1111231533
1211231533
1311231533
1411231533
1511131543
1611131543
1711131543
1811130553
1901030573
2001030573
210929593
220928603
230828613
240827614
250726634
261726624
271725634
281724635
291723645
301823626
311823626

Wind in August

Winds average 16 km/h in August.

Across August, daily wind ranges from about 16 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3118light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 11 h 06 min at the start of August to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over August. Sunrise moves from 7:11 AM to 6:51 AM, and sunset from 6:20 PM to 6:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.17:116:20
211.27:116:20
311.27:106:21
411.27:106:21
511.27:096:21
611.27:096:21
711.27:086:22
811.27:086:22
911.37:076:22
1011.37:076:23
1111.37:066:23
1211.37:056:23
1311.37:056:24
1411.37:046:24
1511.37:036:24
1611.47:036:24
1711.47:026:25
1811.47:016:25
1911.47:016:25
2011.47:006:25
2111.46:596:26
2211.56:586:26
2311.56:586:26
2411.56:576:26
2511.56:566:27
2611.56:556:27
2711.56:546:27
2811.66:546:27
2911.66:536:27
3011.66:526:28
3111.66:516:28

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.65 kWh/m².

For context, solar energy here swings from a low near 3.83 kWh/m² to a high of 6.76 kWh/m² in January across the year — August's 4.65 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.5Bright
94.5Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.7Bright
204.7Bright
214.7Bright
224.8Bright
234.8Bright
244.8Bright
254.9Bright
264.9Bright
275.0Bright
285.0Bright
295.0Bright
305.1Bright
315.1Bright
Planning a trip in August

Is August a good time to visit São Mateus?

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

7.1
Sightseeing
1st-best month of the year
6.1
Beach & pool
4th-best month of the year

August is one of the better times to visit São Mateus for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for São Mateus in August

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

In August, São Mateus sees daytime highs around 24°C and nights near 21°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near São Mateus in August

The nearest coast averages about 24°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 27 km away) is warmest in March at about 28°C and coldest in August near 24°C.

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

22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar28Warm
Apr27Warm
May26Warm
Jun25Warm
Jul24Warm
Aug24Warm
Sep25Warm
Oct25Warm
Nov26Warm
Dec26Warm

UV index in São Mateus in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 9 (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 peaks around February 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeFeb 13UV 14Jun 20UV 7
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun7High
Jul7High
Aug9Very high
Sep10Extreme
Oct12Extreme
Nov14Extreme
Dec13Extreme
Location & terrain

Where is São Mateus?

São Mateus sits at 18.7°S, 39.9°W, 38 m above sea level, in Brazil. The nearest listed city is Conceição da Barra, 19 km away.

Topography around São Mateus

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

Within 3 km, the terrain around São Mateus has only modest variations in elevation — a maximum elevation change of 51 m around an average of 22 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 95 m; within 80 km, large variations in elevation — a maximum elevation change of 744 m.

The land around São Mateus is covered by trees (34%), artificial surfaces (26%) and grassland (21%) within 3 km, trees (55%) and grassland (26%) within 16 km, and grassland (37%), trees (33%) and water (27%) within 80 km.

3 km
51 m
16 km
95 m
80 km
744 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Conceição da Barra 19 km · Jaguaré 31 km · Pinheiros 54 km · Nova Venécia 57 km · Sooretama 59 km · Mucuri 78 km · Linhares 78 km · Rio Bananal 78 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 São Mateus (-18.7201°, -39.8589°, elevation 38 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).