Guajará Mirim weather in August

In August, Guajará Mirim sees average daytime highs of 33°C and overnight lows near 21°C, with 36 mm of rain across 5.6 wet days and about 11.6 hours of daylight. It is the 2nd-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 61% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 11 h 30 min at the start of August to 11 h 48 min by month's end. Set against the rest of the year, August is Guajará Mirim's 2nd-clearest and 1st-windiest month. For the whole year in context, see Guajará Mirim's year-round climate.

Daytime high
33°
2nd warmest
Overnight low
21°
2nd coldest
Rainfall
36 mm
5.6 wet days
Daylight
11 h 36 min
6:36 AM – 6:15 PM
Cloud cover
38%
2nd clearest
Wind
7 km/h
1st windiest
Solar energy
5.37 kWh/m²
Travel score
4.0
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical August day in Guajará Mirim reaches about 33°C in the afternoon and slips back to 21°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 36°C. Set against its neighbours, August runs about 2°C warmer than July and on par with September.

15°20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13220
23320
33320
43320
53320
63320
73320
83320
93320
103320
113320
123320
133321
143321
153321
163321
173321
183321
193321
203321
213321
223321
233321
243321
253321
263321
273321
283322
293322
303322
313322

How August really feels in Guajará Mirim

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.

Guajará Mirim weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°26527.512.62.8
Feb30° / 23°2562512.42.8
Mar30° / 23°25727.212.12.8
Apr30° / 23°16522.911.83.2
May30° / 22°8115.511.54.3
Jun30° / 21°336.811.45.3
Jul31° / 20°214.111.45.2
Aug33° / 21°365.611.64.0
Sep33° / 22°8513.711.93.1
Oct33° / 23°15120.812.22.7
Nov31° / 23°20723.812.52.7
Dec31° / 23°26327.112.62.7

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 61% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 17% of August, with mostly cloudy or overcast conditions the remaining 22%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18317
28218
38218
48119
58119
68119
78020
87921
97921
107822
117723
127723
137723
147723
157822
167822
177822
187822
197822
207822
217723
227723
237723
247624
257525
267525
277525
287426
297327
307228
317228

Chance of precipitation in August

Any precipitation

Guajará Mirim gets around 36 mm of rain over 5.6 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 19% and peaks near 31% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
110
210
310
410
510
611
711
812
913
1014
1115
1216
1317
1418
1518
1619
1720
1820
1921
2022
2122
2223
2324
2425
2525
2626
2727
2828
2929
3030
3131

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 45% of days. Sticky, muggy-or-worse air turns up on roughly 74% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1472137310
2462136320
3462135330
4462135330
5462134340
6462133350
7462132370
8462031380
9462030390
10462029401
11461929411
12461928421
13461928431
14461827431
15461827441
16461727451
17461727461
18461627471
19461526481
20461526491
21461425501
22461324521
23461324522
24361223542
25351223552
26351123562
27351122563
28351022573
29351021583
3035920603
3135920594

Wind in August

Winds average 7 km/h in August, the windiest month of the year.

Across August, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 11 h 30 min at the start of August to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over August. Sunrise moves from 6:42 AM to 6:28 AM, and sunset from 6:13 PM to 6:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.56:426:13
211.56:426:13
311.56:416:13
411.56:416:13
511.66:416:14
611.66:406:14
711.66:406:14
811.66:406:14
911.66:396:14
1011.66:396:14
1111.66:386:14
1211.66:386:14
1311.66:386:14
1411.66:376:15
1511.66:376:15
1611.66:366:15
1711.66:366:15
1811.76:356:15
1911.76:356:15
2011.76:346:15
2111.76:346:15
2211.76:336:15
2311.76:336:15
2411.76:326:15
2511.76:326:15
2611.76:316:15
2711.76:306:15
2811.86:306:15
2911.86:296:15
3011.86:296:15
3111.86:286:15

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.37 kWh/m².

For context, solar energy here swings from a low near 4.27 kWh/m² to a high of 5.6 kWh/m² in September across the year — August's 5.37 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.4Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in August

Hazard calendar for Guajará Mirim

In seasonPeak

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

Guajará Mirim's rainy season runs October–April, when most of the year's rain falls.

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

Is August a good time to visit Guajará Mirim?

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
7.1
Beach & pool
3rd-best month of the year

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

What to pack for Guajará Mirim in August

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

In August, Guajará Mirim sees daytime highs around 33°C and nights near 21°C. Pack light clothes. Worth having: sun protection. About 6 days see rain.

light clothessun protection

UV index in Guajará Mirim in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Guajará Mirim peaks around January 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 13 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 20UV 15Sep 13UV 4
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr13Extreme
May10Extreme
Jun9Very high
Jul8Very high
Aug7High
Sep4Moderate
Oct12Extreme
Nov13Extreme
Dec14Extreme

Air quality in Guajará Mirim 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 Guajará Mirim is worst in September — around 78 µg/m³ PM2.5 (unhealthy), about 9.3× the cleanest month (May, 8 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateUnhealthyModerateSep 1275 µg/m³May 218 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb13Moderate
Mar13Moderate
Apr10Good
May8Good
Jun9Good
Jul16Moderate
Aug63Unhealthy
Sep78Unhealthy
Oct29Moderate
Nov17Moderate
Dec12Moderate
Location & terrain

Where is Guajará Mirim?

Guajará Mirim sits at 10.8°S, 65.3°W, 131 m above sea level, in Brazil. The nearest listed city is Guayaramerín, 5.0 km away.

Alto ParaísoAriquemes

Topography around Guajará Mirim

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

Within 3 km, the terrain around Guajará Mirim has only modest variations in elevation — a maximum elevation change of 44 m around an average of 124 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 247 m; within 80 km, significant variations in elevation — a maximum elevation change of 365 m.

The land around Guajará Mirim is covered by trees (37%), artificial surfaces (24%) and water (20%) within 3 km, grassland (48%) and trees (44%) within 16 km, and trees (84%) within 80 km.

3 km
44 m
16 km
247 m
80 km
365 m
treesgrasslandartificial surfaceswaterwetland
August weather nearby: Guayaramerín 5.0 km · Nova Mamoré 42 km · Riberalta 82 km · Buritis 177 km · Plácido de Castro 208 km · São Francisco do Guaporé 239 km · Alto Paraíso 251 km · Ariquemes 269 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 Guajará Mirim (-10.7836°, -65.3355°, elevation 131 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).