Río Grande in Summer
In summer (June, July and August), Río Grande sees average daytime highs around 31°C and overnight lows near 25°C, with 123 mm of rain over about 30 wet days across the season. It is the warmest season of the year and the driest season of the year.
Across summer, daytime highs hold fairly steady around 31°C. The sky is clear or mostly clear about 41% of the time across summer, and the air most often feels oppressive.
Summer is Río Grande's 3rd-best season to visit on our travel score. Río Grande has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Río Grande's year-round climate.
- Avg daytime high
- 31°C
- warmest season of the year
- Avg overnight low
- 25°C
- Rainfall
- 123 mm
- 30 wet days
- Avg wind
- 15 km/h
- Travel score
- 4.7
- 3rd-best season
- Months
- Jun · Jul · Aug
Temperature in Río Grande in Summer
Across summer, daytime highs hold fairly steady around 31°C.
A typical summer day in Río Grande reaches about 31°C and drops to 25°C overnight. The warmest of the three months is August, the coolest June.
How summer really feels in Río Grande
Once humidity and wind are folded in, summer brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Río Grande weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 27° / 21° | 61 | 11.1 | 10.9 | 6.8 |
| Feb | 27° / 21° | 44 | 8.8 | 11.3 | 7.0 |
| Mar | 28° / 21° | 62 | 10.5 | 11.9 | 6.7 |
| Apr | 28° / 22° | 62 | 12.2 | 12.4 | 5.9 |
| May | 29° / 23° | 84 | 15.9 | 12.9 | 4.7 |
| Jun | 30° / 24° | 42 | 10 | 13.2 | 4.7 |
| Jul | 31° / 25° | 35 | 9.7 | 13.1 | 4.9 |
| Aug | 31° / 25° | 46 | 10.7 | 12.7 | 4.6 |
| Sep | 31° / 25° | 76 | 15.6 | 12.1 | 4.0 |
| Oct | 30° / 24° | 83 | 16 | 11.5 | 4.4 |
| Nov | 28° / 23° | 87 | 15.5 | 11.1 | 5.3 |
| Dec | 27° / 22° | 63 | 11.9 | 10.8 | 6.5 |
Cloud cover in Summer
The sky is clear or mostly clear about 41% of the time across summer.
Chance of precipitation in Summer
Río Grande gets around 123 mm of rain over 30 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 15 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 06 min in early June to 12 h 24 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.8 kWh/m².
Hazard calendar for Río Grande
In summer, Río Grande overlaps 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.
Is summer a good time to visit Río Grande?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer 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 Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Río Grande sees daytime highs around 31°C and nights near 25°C. Pack light clothes and sun protection. Worth having: rain gear. About 30 days see rain.
Sea temperature near Río Grande in Summer
The nearest coast averages about 28°C across summer — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 26 | 26 | 26 | 26 | 27 | 28 | 28 | 28 | 29 | 29 | 28 | 27 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 26 | Warm |
| Feb | 26 | Warm |
| Mar | 26 | Warm |
| Apr | 26 | Warm |
| May | 27 | Warm |
| Jun | 28 | Warm |
| Jul | 28 | Tropical |
| Aug | 28 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 28 | Tropical |
| Dec | 27 | Warm |
UV index in Río Grande in Summer
Clear-sky midday UV across summer averages around 12 (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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 10 | 12 | 12 | 11 | 12 | 12 | 11 | 11 | 10 | 7 | 7 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Very high |
| Mar | 12 | Extreme |
| Apr | 12 | Extreme |
| May | 11 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 11 | Extreme |
| Oct | 10 | Very high |
| Nov | 7 | Very high |
| Dec | 7 | High |
Air quality in Río Grande in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 17 | 16 | 16 | 18 | 23 | 30 | 28 | 25 | 26 | 27 | 20 | 17 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 17 | Moderate |
| Feb | 16 | Moderate |
| Mar | 16 | Moderate |
| Apr | 18 | Moderate |
| May | 23 | Moderate |
| Jun | 30 | Moderate |
| Jul | 28 | Moderate |
| Aug | 25 | Moderate |
| Sep | 26 | Moderate |
| Oct | 27 | Moderate |
| Nov | 20 | Moderate |
| Dec | 17 | Moderate |
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.
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.
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.