Fortuna weather in August

In August, Fortuna sees average daytime highs of 34°C and overnight lows near 22°C, with 1 mm of rain across 0.2 wet days and about 11.8 hours of daylight. It is the 3rd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 69% of the time in August, and the air most often feels humid.

Daylight stretches from about 11 h 42 min at the start of August to 11 h 54 min by month's end. Set against the rest of the year, August is Fortuna's 1st-clearest and 2nd-windiest month. For the whole year in context, see Fortuna's year-round climate.

Daytime high
34°
3rd warmest
Overnight low
22°
8th coldest
Rainfall
1 mm
0.2 wet days
Daylight
11 h 48 min
6:06 AM – 5:55 PM
Cloud cover
30%
1st clearest
Wind
10 km/h
2nd windiest
Solar energy
6.14 kWh/m²
Travel score
4.0
out of 10

Fortuna 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 34°C through the month.

A typical August day in Fortuna reaches about 34°C in the afternoon and slips back to 22°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 35°C. Set against its neighbours, August runs about 1°C warmer than July and about 1°C cooler than September.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13322
23322
33322
43322
53322
63322
73422
83422
93422
103422
113422
123422
133422
143422
153422
163422
173422
183422
193422
203423
213423
223423
233423
243423
253423
263423
273423
283423
293523
303523
313523

How August really feels in Fortuna

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

Fortuna weather by month

How August compares with the rest of the year at a glance. August is the 3rd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 22°2342612.32.9
Feb30° / 22°22024.312.22.9
Mar30° / 22°24827.6122.8
Apr31° / 22°17321.911.93.3
May31° / 22°7311.511.74.2
Jun32° / 22°8211.74.8
Jul33° / 22°70.711.74.7
Aug34° / 22°10.211.84.0
Sep35° / 23°131.7123.2
Oct35° / 23°304.612.13.1
Nov33° / 23°9111.912.33.2
Dec32° / 23°13717.612.33.2

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 69% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 20% of August, with mostly cloudy or overcast conditions the remaining 11%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1919
2919
3919
4919
5919
6919
7919
88911
98911
108911
118911
128812
138812
148812
158812
168614
178614
188614
198614
208713
218713
228713
238812
248812
258812
268911
278911
288911
298911
308911
318911

Chance of precipitation in August

Any precipitation

Fortuna gets around 1 mm of rain over 0.2 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 1% and peaks near 2% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
11
21
31
41
51
61
71
81
91
101
111
121
131
141
151
160
170
180
190
200
211
221
231
241
251
261
271
281
292
302
312

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 23% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
112850192
212850202
312850202
412750202
512750202
612750202
712750203
812650203
912650203
1012650203
1112650203
1212651193
1312651193
1412651193
1512651193
1612652183
1712652183
1812652183
1912553183
2012553183
2112552193
2212552193
2302552194
2402452204
2502452204
2602451214
2702450215
2812349225
2912348226
3012348236
3112347237

Wind in August

Winds average 10 km/h in August.

Across August, daily wind ranges from about 9 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
289calm
299calm
309calm
319calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 11 h 42 min at the start of August to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over August. Sunrise moves from 6:10 AM to 6:00 AM, and sunset from 5:55 PM to 5:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:105:55
211.86:105:55
311.86:105:55
411.86:105:55
511.86:105:55
611.86:095:55
711.86:095:55
811.86:095:55
911.86:095:55
1011.86:085:55
1111.86:085:55
1211.86:085:55
1311.86:075:55
1411.86:075:55
1511.86:075:55
1611.86:065:55
1711.86:065:55
1811.86:065:55
1911.86:055:55
2011.86:055:55
2111.86:055:55
2211.86:045:55
2311.86:045:54
2411.86:035:54
2511.96:035:54
2611.96:025:54
2711.96:025:54
2811.96:025:54
2911.96:015:54
3011.96:015:53
3111.96:005:53

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.14 kWh/m².

For context, solar energy here swings from a low near 4.46 kWh/m² to a high of 6.43 kWh/m² in September across the year — August's 6.14 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
46.0Bright
56.0Bright
66.0Bright
76.0Intense
86.0Intense
96.0Intense
106.1Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.1Intense
176.2Intense
186.2Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
316.3Intense
Planning a trip in August

Hazard calendar for Fortuna

In seasonPeak

None of Fortuna's seasonal hazards are active in August. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Fortuna's monsoon runs December–April, when most of the year's rain falls.

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

Is August a good time to visit Fortuna?

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

4.0
Sightseeing
4th-best month of the year
7.8
Beach & pool
2nd-best month of the year

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

What to pack for Fortuna in August

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

In August, Fortuna sees daytime highs around 34°C and nights near 22°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Fortuna in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Fortuna peaks around March 11 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 10 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 11UV 15Aug 10UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Fortuna in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Fortuna is worst in October — around 53 µg/m³ PM2.5 (poor), about 8.4× the cleanest month (June, 6 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModeratePoorModerateOct 953 µg/m³Jun 167 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar12Good
Apr11Good
May8Good
Jun6Good
Jul8Good
Aug25Moderate
Sep53Poor
Oct53Poor
Nov23Moderate
Dec17Moderate
Location & terrain

Where is Fortuna?

Fortuna sits at 5.7°S, 44.2°W, 210 m above sea level, in Brazil. The nearest listed city is São Domingos do Maranhão, 31 km away.

Topography around Fortuna

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

Within 3 km, the terrain around Fortuna has only modest variations in elevation — a maximum elevation change of 108 m around an average of 211 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 278 m; within 80 km, significant variations in elevation — a maximum elevation change of 410 m.

The land around Fortuna is covered by grassland (56%) and trees (35%) within 3 km, trees (59%) and grassland (32%) within 16 km, and trees (68%) and grassland (27%) within 80 km.

3 km
108 m
16 km
278 m
80 km
410 m
treesshrubsgrasslandcroplandartificial surfaces
August weather nearby: São Domingos do Maranhão 31 km · Colinas 34 km · Buriti Bravo 38 km · Presidente Dutra 61 km · Passagem Franca 65 km · Mirador 74 km · Tuntum 76 km · São João do Soter 79 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 Fortuna (-5.7333°, -44.1583°, elevation 210 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).