Guastatoya weather in August

In August, Guastatoya sees average daytime highs of 26°C and overnight lows near 17°C, with 138 mm of rain across 20.1 wet days and about 12.5 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 10% of the time in August, and the air most often feels humid.

Daylight stretches from about 12 h 42 min at the start of August to 12 h 18 min by month's end. Set against the rest of the year, August is Guastatoya's 8th-clearest and 8th-windiest month. For the whole year in context, see Guastatoya's year-round climate.

Daytime high
26°
4th warmest
Overnight low
17°
9th coldest
Rainfall
138 mm
20.1 wet days
Daylight
12 h 30 min
5:49 AM – 6:19 PM
Cloud cover
74%
8th clearest
Wind
6 km/h
8th windiest
Solar energy
5.83 kWh/m²
Travel score
4.9
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical August day in Guastatoya reaches about 26°C in the afternoon and slips back to 17°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 28°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)
12616
22616
32616
42616
52616
62616
72616
82616
92616
102616
112616
122616
132616
142617
152617
162617
172617
182617
192617
202617
212617
222617
232717
242717
252717
262717
272717
282717
292717
302717
312717

Guastatoya weather by month

How August compares with the rest of the year at a glance. August is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 13°62.111.28.5
Feb26° / 13°41.311.58.4
Mar28° / 14°123.211.97.7
Apr29° / 16°417.312.36.1
May28° / 17°14317.712.74.9
Jun26° / 17°21524.312.94.2
Jul26° / 16°11418.712.85.2
Aug26° / 17°13820.112.54.9
Sep26° / 17°21624.912.14.1
Oct25° / 16°14318.811.75.3
Nov24° / 15°326.111.37.5
Dec24° / 14°112.611.18.4

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 16% of August, with mostly cloudy or overcast conditions the remaining 74%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13169
23070
32971
42971
52872
62971
72872
82872
92872
102773
112773
122773
132674
142674
152674
162674
172674
182674
192674
202674
212575
222575
232476
242476
252476
262476
272377
282278
292278
302278
312179

Chance of precipitation in August

Any precipitation

Guastatoya gets around 138 mm of rain over 20.1 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 65% and peaks near 77% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
158
258
358
459
559
660
760
861
961
1062
1163
1263
1363
1464
1564
1664
1764
1864
1965
2066
2166
2267
2368
2469
2570
2671
2772
2873
2974
3076
3177

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 91% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)
17903
27903
37903
47903
57903
67903
77903
87903
97903
107903
117903
127912
137912
146922
156922
166922
176922
186922
196922
206913
216913
226913
236913
246904
256904
266904
276904
286904
296904
305914
315914

Wind in August

Winds average 6 km/h in August.

Across August, 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.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
295calm
305calm
315calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 12 h 42 min at the start of August to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 24 minutes over August. Sunrise moves from 5:46 AM to 5:51 AM, and sunset from 6:26 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:466:26
212.75:476:26
312.65:476:26
412.65:476:25
512.65:476:25
612.65:476:24
712.65:486:24
812.65:486:24
912.65:486:23
1012.65:486:23
1112.65:486:22
1212.55:496:22
1312.55:496:21
1412.55:496:21
1512.55:496:20
1612.55:496:19
1712.55:506:19
1812.55:506:18
1912.55:506:18
2012.55:506:17
2112.45:506:16
2212.45:506:16
2312.45:506:15
2412.45:506:14
2512.45:516:14
2612.45:516:13
2712.45:516:12
2812.35:516:12
2912.35:516:11
3012.35:516:10
3112.35:516:09

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.83 kWh/m².

For context, solar energy here swings from a low near 4.5 kWh/m² to a high of 6.23 kWh/m² in April across the year — August's 5.83 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Bright
46.0Bright
56.0Bright
66.0Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.6Bright
315.6Bright
Planning a trip in August

Hazard calendar for Guastatoya

In seasonPeak

In August, Guastatoya sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Guastatoya's monsoon runs May–October, 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 Guastatoya?

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

4.9
Sightseeing
9th-best month of the year
4.8
Beach & pool
9th-best month of the year

August is a reasonable time to visit Guastatoya for sightseeing.

What to pack for Guastatoya in August

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

In August, Guastatoya sees daytime highs around 26°C and nights near 17°C. Pack rain gear. Worth having: light clothes and sun protection. About 20 days see rain.

rain gearlight clothessun protection

UV index in Guastatoya in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Guastatoya peaks around April 12 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 12UV 14Dec 15UV 9
UV index (midday)Level
Jan10Very high
Feb13Extreme
Mar14Extreme
Apr14Extreme
May13Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov10Very high
Dec9Very high

Air quality in Guastatoya 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 Guastatoya is worst in April — around 55 µg/m³ PM2.5 (unhealthy), about 3.0× the cleanest month (November, 18 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateApr 1853 µg/m³Nov 2318 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb20Moderate
Mar25Moderate
Apr55Unhealthy
May39Poor
Jun24Moderate
Jul23Moderate
Aug21Moderate
Sep21Moderate
Oct20Moderate
Nov18Moderate
Dec18Moderate
Location & terrain

Where is Guastatoya?

Guastatoya sits at 14.9°N, 90.1°W, 520 m above sea level, in Guatemala. The nearest listed city is Sanarate, 16 km away.

JalapaPalenciaSalamáSan Pedro AyampucSan Luis JilotepequeChinautlaSan José Pinula

Topography around Guastatoya

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

Within 3 km, the terrain around Guastatoya has large variations in elevation — a maximum elevation change of 682 m around an average of 638 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,805 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,984 m.

The land around Guastatoya is covered by shrubs (70%) within 3 km, shrubs (60%) and trees (24%) within 16 km, and trees (64%) within 80 km.

3 km
682 m
16 km
1,805 m
80 km
2,984 m
treesshrubsgrasslandcroplandartificial surfaces
August weather nearby: Sanarate 16 km · Jalapa 26 km · Palencia 37 km · Salamá 38 km · San Pedro Ayampuc 42 km · San Luis Jilotepeque 44 km · Chinautla 49 km · San José Pinula 50 km

Guatemala travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 43% of US
price level, 2025
GDP per capita
$6,598
2025
Happiness
6.5 / 10
World Happiness, 2025
Safe drinking water
49%
of population, 2024
Homicide rate
23.4
per 100k, 2023
Road deaths
22.9
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 510
Religion
Evangelical 46%Roman Catholic 42%none 11%

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 Guastatoya (14.8544°, -90.0699°, elevation 520 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).