Rosario de la Frontera in Summer
In summer (December, January and February), Rosario de la Frontera sees average daytime highs around 27°C and overnight lows near 17°C, with 639 mm of rain over about 57 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 27°C. The sky is clear or mostly clear about 16% of the time across summer, and the air most often feels humid.
Summer is Rosario de la Frontera's weakest season of the year to visit on our travel score. For the whole year in context, see Rosario de la Frontera's year-round climate.
- Avg daytime high
- 27°C
- warmest season of the year
- Avg overnight low
- 17°C
- Rainfall
- 639 mm
- 57 wet days
- Avg wind
- 7 km/h
- Travel score
- 5.1
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Rosario de la Frontera in Summer
Across summer, daytime highs hold fairly steady around 27°C.
A typical summer day in Rosario de la Frontera reaches about 27°C and drops to 17°C overnight. The warmest of the three months is December, the coolest February.
Rosario de la Frontera weather by month
How the three summer months (December, January and February) 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° / 18° | 244 | 20.2 | 13.4 | 4.9 |
| Feb | 26° / 17° | 199 | 18.1 | 12.9 | 5.1 |
| Mar | 24° / 16° | 169 | 18.3 | 12.2 | 5.5 |
| Apr | 22° / 13° | 91 | 13.4 | 11.4 | 6.1 |
| May | 20° / 10° | 42 | 9 | 10.8 | 6.4 |
| Jun | 18° / 7° | 18 | 5.3 | 10.4 | 6.9 |
| Jul | 19° / 5° | 13 | 4 | 10.6 | 7.4 |
| Aug | 22° / 7° | 15 | 3.5 | 11.1 | 8.1 |
| Sep | 24° / 10° | 25 | 5.1 | 11.8 | 8.0 |
| Oct | 26° / 14° | 78 | 11.7 | 12.6 | 6.6 |
| Nov | 26° / 15° | 122 | 14.8 | 13.3 | 5.8 |
| Dec | 27° / 17° | 196 | 18.5 | 13.6 | 5.2 |
Cloud cover in Summer
The sky is clear or mostly clear about 16% of the time across summer.
Chance of precipitation in Summer
Rosario de la Frontera gets around 639 mm of rain over 57 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 7 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 30 min in early December to 12 h 36 min by late February. 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 5.6 kWh/m².
Hazard calendar for Rosario de la Frontera
In summer, Rosario de la Frontera overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
Rosario de la Frontera's monsoon runs November–March, when most of the year's rain falls.
Is summer a good time to visit Rosario de la Frontera?
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 Rosario de la Frontera for sightseeing.
What to pack for Rosario de la Frontera in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Rosario de la Frontera sees daytime highs around 27°C and nights near 17°C. Pack light clothes and rain gear. Worth having: sun protection. About 57 days see rain.
UV index in Rosario de la Frontera in Summer
Clear-sky midday UV across summer averages around 15 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Rosario de la Frontera peaks around January 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 5 (moderate).
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) | 15 | 15 | 13 | 8 | 6 | 5 | 5 | 7 | 9 | 12 | 13 | 14 |
| Level | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate | High | Very high | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 15 | Extreme |
| Mar | 13 | Extreme |
| Apr | 8 | Very high |
| May | 6 | High |
| Jun | 5 | Moderate |
| Jul | 5 | Moderate |
| Aug | 7 | High |
| Sep | 9 | Very high |
| Oct | 12 | Extreme |
| Nov | 13 | Extreme |
| Dec | 14 | Extreme |
Where is Rosario de la Frontera?
Rosario de la Frontera sits at 25.8°S, 65.0°W, 768 m above sea level, in Argentina. The nearest listed city is San José de Metán, 34 km away.
Topography around Rosario de la Frontera
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Rosario de la Frontera.
Within 3 km, the terrain around Rosario de la Frontera has only modest variations in elevation — a maximum elevation change of 88 m around an average of 791 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 975 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,471 m.
The land around Rosario de la Frontera is covered by cropland (50%) within 3 km, trees (53%) and cropland (38%) within 16 km, and trees (52%) within 80 km.
Argentina travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / I
- 220 V · 50 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $14,898
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Homicide rate
- 4.5
- per 100k, 2023
- Road deaths
- 14.1
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- High
- EF EPI 575
- Religion
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 Rosario de la Frontera (-25.7986°, -64.9739°, elevation 768 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.