Trelew in Summer
In summer (December, January and February), Trelew sees average daytime highs around 27°C and overnight lows near 15°C, with 55 mm of rain over about 10 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.
Across summer, daytime highs hold fairly steady around 27°C. The sky is clear or mostly clear about 56% of the time across summer, and the air most often feels dry.
Summer is Trelew's best season of the year to visit on our travel score. For the whole year in context, see Trelew's year-round climate.
- Avg daytime high
- 27°C
- warmest season of the year
- Avg overnight low
- 15°C
- Rainfall
- 55 mm
- 10 wet days
- Avg wind
- 20 km/h
- Travel score
- 8.0
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in Trelew in Summer
Across summer, daytime highs hold fairly steady around 27°C.
A typical summer day in Trelew reaches about 27°C and drops to 15°C overnight. The warmest of the three months is January, the coolest December.
How summer really feels in Trelew
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Trelew 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 | 28° / 16° | 15 | 3 | 14.8 | 7.9 |
| Feb | 27° / 15° | 22 | 3.7 | 13.8 | 8.0 |
| Mar | 24° / 13° | 21 | 3.5 | 12.4 | 8.2 |
| Apr | 20° / 10° | 19 | 2.9 | 10.8 | 7.6 |
| May | 16° / 6° | 23 | 4 | 9.5 | 5.6 |
| Jun | 12° / 3° | 23 | 4.1 | 8.9 | 3.8 |
| Jul | 12° / 3° | 14 | 3.5 | 9.1 | 3.7 |
| Aug | 14° / 4° | 14 | 3.4 | 10.2 | 4.9 |
| Sep | 17° / 6° | 18 | 4 | 11.7 | 6.2 |
| Oct | 20° / 9° | 18 | 4.1 | 13.2 | 7.4 |
| Nov | 23° / 12° | 16 | 3.2 | 14.5 | 8.2 |
| Dec | 26° / 14° | 18 | 3 | 15.1 | 8.1 |
Cloud cover in Summer
The sky is clear or mostly clear about 56% of the time across summer.
Chance of precipitation in Summer
Trelew gets around 55 mm of rain over 10 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 20 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 15 hours in early December to 13 h 12 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 7.5 kWh/m².
Is summer a good time to visit Trelew?
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 one of the better times to visit Trelew for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Trelew in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Trelew sees daytime highs around 27°C and nights near 15°C. Pack light clothes and sun protection. Worth having: a windbreaker. About 10 days see rain.
Sea temperature near Trelew in Summer
The nearest coast averages about 16°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 38 km away) is warmest in February at about 17°C and coldest in August near 9°C.
The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 17 | 17 | 17 | 15 | 13 | 12 | 10 | 9 | 9 | 11 | 13 | 15 |
| Comfort | Cool | Cool | Cool | Cool | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 17 | Cool |
| Feb | 17 | Cool |
| Mar | 17 | Cool |
| Apr | 15 | Cool |
| May | 13 | Bracing |
| Jun | 12 | Bracing |
| Jul | 10 | Bracing |
| Aug | 9 | Bracing |
| Sep | 9 | Bracing |
| Oct | 11 | Bracing |
| Nov | 13 | Bracing |
| Dec | 15 | Bracing |
UV index in Trelew in Summer
Clear-sky midday UV across summer averages 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 Trelew peaks around December 22 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 11 | 10 | 7 | 4 | 2 | 1 | 2 | 2 | 4 | 7 | 9 | 12 |
| Level | Extreme | Extreme | High | Moderate | Moderate | Low | Low | Moderate | Moderate | High | Very high | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 10 | Extreme |
| Mar | 7 | High |
| Apr | 4 | Moderate |
| May | 2 | Moderate |
| Jun | 1 | Low |
| Jul | 2 | Low |
| Aug | 2 | Moderate |
| Sep | 4 | Moderate |
| Oct | 7 | High |
| Nov | 9 | Very high |
| Dec | 12 | Extreme |
Where is Trelew?
Trelew sits at 43.2°S, 65.3°W, 14 m above sea level, in Argentina. The nearest listed city is Rawson, 17 km away.
Topography around Trelew
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Trelew.
Within 3 km, the terrain around Trelew has only modest variations in elevation — a maximum elevation change of 35 m around an average of 19 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 205 m; within 80 km, significant variations in elevation — a maximum elevation change of 336 m.
The land around Trelew is covered by artificial surfaces (51%), grassland (22%) and shrubs (20%) within 3 km, shrubs (67%) and grassland (20%) within 16 km, and shrubs (65%) and water (25%) 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 Trelew (-43.249°, -65.305°, elevation 14 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.