Rojas weather in January

In January, Rojas sees average daytime highs of 29°C and overnight lows near 18°C, with 107 mm of rain across 8.8 wet days and about 14 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 51% of the time in January, and the air most often feels muggy.

Daylight stretches from about 14 h 12 min at the start of January to 13 h 42 min by month's end. Set against the rest of the year, January is Rojas's 1st-clearest and 10th-windiest month. For the whole year in context, see Rojas's year-round climate.

Daytime high
29°
1st warmest
Overnight low
18°
12th coldest
Rainfall
107 mm
8.8 wet days
Daylight
14 hours
6:11 AM – 8:14 PM
Cloud cover
42%
1st clearest
Wind
12 km/h
10th windiest
Solar energy
7.28 kWh/m²
Travel score
5.9
out of 10

Rojas is town in the SanJuan Province, Argentina.

Founded
1777

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 29°C through the month.

A typical January day in Rojas reaches about 29°C in the afternoon and slips back to 18°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 33°C. Set against its neighbours, January runs on par with December and about 1°C warmer than February.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12918
22918
32918
42918
52918
62918
72918
82918
92918
102918
112918
122918
132918
142918
152918
162918
172918
182918
192918
202918
212918
222918
232918
242918
252918
262918
272918
282918
292918
302918
312817

Rojas weather by month

How January compares with the rest of the year at a glance. January is the 1st-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 18°1078.8145.9
Feb28° / 17°1028.113.36.7
Mar26° / 15°958.112.37.2
Apr23° / 12°938.211.27.3
May19° / 646.410.26.6
Jun16° / 4359.85.5
Jul15° / 334.7105.2
Aug18° / 514.710.76.6
Sep20° / 666.311.87.0
Oct23° / 11°1229.912.96.9
Nov26° / 14°1018.413.87.2
Dec28° / 16°105914.26.3

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 51% of the time in January, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of January, with mostly cloudy or overcast conditions the remaining 32%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26535
36535
46535
56535
66634
76733
86733
96733
106832
116832
126931
137030
147030
157129
167129
177129
187129
197129
207129
217030
227030
237030
246931
256931
266832
276733
286733
296634
306634
316535

Chance of precipitation in January

Any precipitation

Rojas gets around 107 mm of rain over 8.8 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 28% and peaks near 32% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
130
230
330
429
529
629
729
829
929
1028
1128
1228
1327
1427
1527
1626
1726
1826
1926
2026
2127
2227
2327
2428
2529
2629
2730
2831
2931
3032
3132

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the muggy band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 36% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1152227296
2152227306
3152227306
4152227306
5152127306
6152127306
7162127306
8162128306
9162128306
10162128306
11162128295
12162129295
13162129295
14162129295
15162029286
16162030286
17162030286
18162030286
19162030286
20161930286
21161930287
22161930287
23151930297
24151830297
25151830297
26151830308
27151730308
28151729308
29151729308
30141729309
31141729309

Wind in January

Winds average 12 km/h in January.

Across January, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm
3112calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 14 h 12 min at the start of January to 13 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over January. Sunrise moves from 5:59 AM to 6:25 AM, and sunset from 8:13 PM to 8:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.25:598:13
214.25:598:14
314.26:008:14
414.26:018:14
514.26:028:14
614.26:028:14
714.26:038:14
814.26:048:14
914.26:058:14
1014.16:068:14
1114.16:068:14
1214.16:078:14
1314.16:088:14
1414.16:098:14
1514.16:108:14
1614.06:118:14
1714.06:128:13
1814.06:138:13
1914.06:138:13
2014.06:148:13
2114.06:158:12
2213.96:168:12
2313.96:178:12
2413.96:188:11
2513.96:198:11
2613.86:208:10
2713.86:218:10
2813.86:228:09
2913.86:238:09
3013.76:248:08
3113.76:258:08

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 7.28 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 7.4 kWh/m² in December across the year — January's 7.28 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.3Intense
27.3Intense
37.3Intense
47.3Intense
57.3Intense
67.3Intense
77.3Intense
87.3Intense
97.3Intense
107.4Intense
117.4Intense
127.4Intense
137.4Intense
147.4Intense
157.4Intense
167.3Intense
177.3Intense
187.3Intense
197.3Intense
207.3Intense
217.3Intense
227.2Intense
237.2Intense
247.2Intense
257.1Intense
267.1Intense
277.0Intense
287.0Intense
296.9Intense
306.9Intense
316.8Intense
Planning a trip in January

Is January a good time to visit Rojas?

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

5.9
Sightseeing
10th-best month of the year
7.5
Beach & pool
1st-best month of the year

January is a reasonable time to visit Rojas for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Rojas in January

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

In January, Rojas sees daytime highs around 29°C and nights near 18°C. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

UV index in Rojas in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rojas peaks around January 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 15UV 13Jun 20UV 3
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar10Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Rojas?

Rojas sits at 34.2°S, 60.7°W, 56 m above sea level, in Argentina. The nearest listed city is Pergamino, 37 km away.

Topography around Rojas

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

Within 3 km, the terrain around Rojas has only modest variations in elevation — a maximum elevation change of 20 m around an average of 65 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 43 m; within 80 km, only modest variations in elevation — a maximum elevation change of 112 m.

The land around Rojas is covered by cropland (63%) within 3 km, cropland (91%) within 16 km, and cropland (90%) within 80 km.

3 km
20 m
16 km
43 m
80 km
112 m
treesgrasslandcroplandartificial surfaceswater
January weather nearby: Pergamino 37 km · Salto 45 km · Colón 47 km · Junín 48 km · Chacabuco 55 km · Arrecifes 60 km · Carmen de Areco 86 km · Los Toldos 93 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 Rojas (-34.1977°, -60.7337°, elevation 56 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. 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).