Trelew weather in January

In January, Trelew sees average daytime highs of 28°C and overnight lows near 16°C, with 15 mm of rain across 3 wet days and about 14.8 hours of daylight. It is the 1st-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 58% of the time in January, and the air most often feels dry.

Daylight stretches from about 15 h 12 min at the start of January to 14 h 24 min by month's end. Set against the rest of the year, January is Trelew's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Trelew's year-round climate.

Daytime high
28°
1st warmest
Overnight low
16°
12th coldest
Rainfall
15 mm
3 wet days
Daylight
14 h 54 min
6:04 AM – 8:57 PM
Cloud cover
36%
2nd clearest
Wind
20 km/h
2nd windiest
Solar energy
7.84 kWh/m²
Travel score
7.9
out of 10

Trelew is city in Argentina.

Density
393/km²
people per km²
Founded
1886

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical January day in Trelew reaches about 28°C in the afternoon and slips back to 16°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 34°C. Set against its neighbours, January runs about 2°C warmer than December and about 1°C warmer than February.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12715
22715
32715
42715
52715
62715
72715
82715
92716
102716
112816
122816
132816
142816
152816
162816
172816
182816
192816
202816
212816
222816
232816
242816
252816
262816
272816
282816
292816
302716
312716

How January really feels in Trelew

Once humidity and wind are folded in, January averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

January 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 January compares with the rest of the year at a glance. January is the 1st-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 16°15314.87.9
Feb27° / 15°223.713.88.0
Mar24° / 13°213.512.48.2
Apr20° / 10°192.910.87.6
May16° / 2349.55.6
Jun12° / 234.18.93.8
Jul12° / 143.59.13.7
Aug14° / 143.410.24.9
Sep17° / 18411.76.2
Oct20° / 184.113.27.4
Nov23° / 12°163.214.58.2
Dec26° / 14°18315.18.1

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 58% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 20% of January, with mostly cloudy or overcast conditions the remaining 22%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17624
27624
37624
47723
57723
67723
77822
87822
97822
107822
117822
127822
137822
147921
157921
167921
177921
188020
198020
208020
218020
227921
237822
247822
257822
267822
277822
287822
297723
307723
317723

Chance of precipitation in January

Any precipitation

Trelew gets around 15 mm of rain over 3 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 10% and peaks near 13% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
110
210
311
410
510
610
710
89
99
109
119
128
138
148
158
168
178
188
199
209
219
229
2310
2410
2511
2611
2711
2812
2912
3012
3113

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January lands in the dry band about 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19451
29451
39451
49451
59550
69550
79550
89640
99640
109640
119640
129640
139550
149451
159451
169361
179361
189361
199361
209361
219262
229262
239262
249262
259262
269262
279352
289352
299352
309442
319442

Wind in January

Winds average 20 km/h in January.

Across January, daily wind ranges from about 20 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
120light breeze
220light breeze
320light breeze
420breezy
520breezy
620breezy
720breezy
820breezy
920breezy
1020breezy
1120breezy
1220breezy
1320breezy
1420breezy
1520breezy
1620breezy
1720light breeze
1820light breeze
1920light breeze
2020light breeze
2120light breeze
2220light breeze
2320light breeze
2420light breeze
2520light breeze
2620light breeze
2720light breeze
2820light breeze
2920light breeze
3020light breeze
3120light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 15 h 12 min at the start of January to 14 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over January. Sunrise moves from 5:50 AM to 6:23 AM, and sunset from 8:59 PM to 8:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.25:508:59
215.15:518:59
315.15:518:59
415.15:528:59
515.15:538:59
615.15:548:59
715.15:558:59
815.05:568:59
915.05:578:59
1015.05:588:59
1115.05:598:58
1215.06:008:58
1314.96:018:58
1414.96:028:57
1514.96:038:57
1614.96:048:57
1714.86:068:56
1814.86:078:56
1914.86:088:55
2014.86:098:55
2114.76:108:54
2214.76:128:53
2314.76:138:53
2414.66:148:52
2514.66:158:51
2614.66:178:50
2714.56:188:50
2814.56:198:49
2914.56:208:48
3014.46:228:47
3114.46:238:46

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 7.84 kWh/m².

For context, solar energy here swings from a low near 1.6 kWh/m² to a high of 8.09 kWh/m² in December across the year — January's 7.84 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
18.1Intense
28.1Intense
38.1Intense
48.1Intense
58.1Intense
68.1Intense
78.1Intense
88.1Intense
98.0Intense
108.0Intense
118.0Intense
128.0Intense
138.0Intense
148.0Intense
157.9Intense
167.9Intense
177.9Intense
187.8Intense
197.8Intense
207.8Intense
217.7Intense
227.7Intense
237.6Intense
247.6Intense
257.5Intense
267.5Intense
277.5Intense
287.4Intense
297.4Intense
307.3Intense
317.3Intense
Planning a trip in January

Is January a good time to visit Trelew?

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

7.9
Sightseeing
5th-best month of the year
8.2
Beach & pool
1st-best month of the year

January 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 January

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

In January, Trelew sees daytime highs around 28°C and nights near 16°C. Pack light clothes and sun protection. About 3 days see rain.

light clothessun protection

Sea temperature near Trelew in January

The nearest coast averages about 17°C in January — 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.

10°15°JanFebMarAprMayJunJulAugSepOctNovDecbracingcool
Sea temperature (°C)Comfort
Jan17Cool
Feb17Cool
Mar17Cool
Apr15Cool
May13Bracing
Jun12Bracing
Jul10Bracing
Aug9Bracing
Sep9Bracing
Oct11Bracing
Nov13Bracing
Dec15Bracing

UV index in Trelew in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateLowModerateVery highExtremeDec 22UV 12Jun 19UV 1
UV index (midday)Level
Jan11Extreme
Feb10Extreme
Mar7High
Apr4Moderate
May2Moderate
Jun1Low
Jul2Low
Aug2Moderate
Sep4Moderate
Oct7High
Nov9Very high
Dec12Extreme
Location & terrain

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.

San Antonio OesteViedmaCarmen de PatagonesComodoro RivadaviaCaleta OliviaPico Truncado

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.

3 km
35 m
16 km
205 m
80 km
336 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Rawson 17 km · Puerto Madryn 58 km · San Antonio Oeste 281 km · Viedma 331 km · Carmen de Patagones 333 km · Comodoro Rivadavia 338 km · Caleta Olivia 396 km · Pico Truncado 446 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
Roman Catholic 63%none 19%Evangelical 15%Jehovah's Witness and Church of Jesus Christ 1%

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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).