Río Grande weather in August

In August, Río Grande sees average daytime highs of 31°C and overnight lows near 25°C, with 46 mm of rain across 10.7 wet days and about 12.7 hours of daylight. It is the 1st-warmest and 9th-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 41% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 12 h 54 min at the start of August to 12 h 24 min by month's end. Set against the rest of the year, August is Río Grande's 8th-clearest and 2nd-windiest month. For the whole year in context, see Río Grande's year-round climate.

Daytime high
31°
1st warmest
Overnight low
25°
12th coldest
Rainfall
46 mm
10.7 wet days
Daylight
12 h 42 min
6:27 AM – 7:07 PM
Cloud cover
52%
8th clearest
Wind
15 km/h
2nd windiest
Solar energy
6.61 kWh/m²
Travel score
4.6
out of 10

Río Grande is human settlement in the Dominican Republic.

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 31°C through the month.

A typical August day in Río Grande reaches about 31°C in the afternoon and slips back to 25°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 32°C. Set against its neighbours, August runs on par with July and on par with September.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13125
23125
33125
43125
53125
63125
73125
83125
93125
103125
113125
123125
133125
143125
153125
163125
173125
183125
193125
203125
213125
223125
233125
243125
253125
263125
273125
283125
293125
303125
313125

How August really feels in Río Grande

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.

Río Grande weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 21°6111.110.96.8
Feb27° / 21°448.811.37.0
Mar28° / 21°6210.511.96.7
Apr28° / 22°6212.212.45.9
May29° / 23°8415.912.94.7
Jun30° / 24°421013.24.7
Jul31° / 25°359.713.14.9
Aug31° / 25°4610.712.74.6
Sep31° / 25°7615.612.14.0
Oct30° / 24°831611.54.4
Nov28° / 23°8715.511.15.3
Dec27° / 22°6311.910.86.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 40%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16733
26634
36634
46634
56535
66535
76535
86535
96535
106436
116436
126436
136337
146337
156238
166139
176139
186040
195941
205842
215743
225644
235644
245545
255545
265446
275446
285446
295446
305347
315347

Chance of precipitation in August

Any precipitation

Río Grande gets around 46 mm of rain over 10.7 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 35% and peaks near 46% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
132
231
331
430
530
629
729
828
928
1028
1128
1229
1329
1430
1531
1632
1733
1834
1936
2037
2138
2239
2341
2441
2542
2643
2744
2844
2945
3045
3146

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 86% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
18911
28911
38911
48911
58911
68911
78911
88911
98812
108812
118812
128812
138812
148812
158713
168713
178713
188614
198614
208515
218515
228416
238416
248317
258317
268317
278218
288218
298218
308218
318218

Wind in August

Winds average 15 km/h in August.

Across August, daily wind ranges from about 14 km/h on the calmest days to 16 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
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 12 h 54 min at the start of August to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over August. Sunrise moves from 6:22 AM to 6:31 AM, and sunset from 7:16 PM to 6:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:227:16
212.96:227:16
312.96:237:15
412.96:237:15
512.86:237:14
612.86:247:14
712.86:247:13
812.86:247:13
912.86:257:12
1012.86:257:11
1112.86:257:11
1212.76:267:10
1312.76:267:09
1412.76:267:09
1512.76:277:08
1612.76:277:07
1712.76:277:07
1812.66:277:06
1912.66:287:05
2012.66:287:04
2112.66:287:04
2212.66:297:03
2312.66:297:02
2412.56:297:01
2512.56:297:01
2612.56:307:00
2712.56:306:59
2812.56:306:58
2912.46:306:57
3012.46:316:56
3112.46:316:55

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.61 kWh/m².

For context, solar energy here swings from a low near 4.15 kWh/m² to a high of 6.9 kWh/m² in June across the year — August's 6.61 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.8Intense
26.8Intense
36.8Intense
46.8Intense
56.8Intense
66.8Intense
76.8Intense
86.8Intense
96.7Intense
106.7Intense
116.7Intense
126.7Intense
136.7Intense
146.7Intense
156.6Intense
166.6Intense
176.6Intense
186.6Intense
196.5Intense
206.5Intense
216.5Intense
226.5Intense
236.5Intense
246.5Intense
256.4Intense
266.4Intense
276.4Intense
286.4Intense
296.4Intense
306.4Intense
316.4Intense
Planning a trip in August

Hazard calendar for Río Grande

In seasonPeak

In August, Río Grande sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Río Grande sits in the Atlantic hurricane belt; the season peaks August–October.

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

Is August a good time to visit Río Grande?

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

4.6
Sightseeing
10th-best month of the year
6.7
Beach & pool
8th-best month of the year

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

What to pack for Río Grande in August

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

In August, Río Grande sees daytime highs around 31°C and nights near 25°C. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.

light clothessun protectionrain gear

Sea temperature near Río Grande in August

The nearest coast averages about 28°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 26 km away) is warmest in September at about 29°C and coldest in February near 26°C.

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

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar26Warm
Apr26Warm
May27Warm
Jun28Warm
Jul28Tropical
Aug28Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec27Warm

UV index in Río Grande in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Río Grande peaks around March 22 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighMar 22UV 12Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar12Extreme
Apr12Extreme
May11Extreme
Jun12Extreme
Jul12Extreme
Aug11Extreme
Sep11Extreme
Oct10Very high
Nov7Very high
Dec7High

Air quality in Río Grande 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 Río Grande is worst in June — around 30 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (February, 16 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJun 2030 µg/m³Feb 2016 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb16Moderate
Mar16Moderate
Apr18Moderate
May23Moderate
Jun30Moderate
Jul28Moderate
Aug25Moderate
Sep26Moderate
Oct27Moderate
Nov20Moderate
Dec17Moderate
Location & terrain

Where is Río Grande?

Río Grande sits at 19.7°N, 70.8°W, 397 m above sea level, in Dominican Republic. The nearest listed city is Villa Bisonó, 16 km away.

EsperanzaSantiago de los CaballerosTamborilSosuaMao

Topography around Río Grande

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

Within 3 km, the terrain around Río Grande has significant variations in elevation — a maximum elevation change of 453 m around an average of 344 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,235 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,073 m.

The land around Río Grande is covered by trees (88%) within 3 km, trees (78%) within 16 km, and trees (47%) and water (30%) within 80 km.

3 km
453 m
16 km
1,235 m
80 km
3,073 m
treesshrubsgrasslandcroplandartificial surfaceswater
August weather nearby: Villa Bisonó 16 km · Puerto Plata 16 km · Monte Llano 19 km · Esperanza 25 km · Santiago de los Caballeros 25 km · Tamboril 26 km · Sosua 28 km · Mao 35 km

Dominican Republic travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C
120 V · 60 Hz
Prices
≈ 39% of US
price level, 2025
GDP per capita
$11,059
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
45%
of population, 2024
Homicide rate
10.9
per 100k, 2023
Road deaths
64.6
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 503

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 Río Grande (19.6667°, -70.7667°, elevation 397 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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. 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).