Fray Bentos weather in December

In December, Fray Bentos sees average daytime highs of 29°C and overnight lows near 18°C, with 123 mm of rain across 8 wet days and about 14.1 hours of daylight. It is the 2nd-warmest and 2nd-wettest month of the year here.

Highs climb over the month, from about 28°C in the first days to 30°C by the end. The sky is clear or mostly clear about 50% of the time in December, and the air most often feels humid.

Daylight stretches from about 14 hours at the start of December to 14 h 12 min by month's end. Set against the rest of the year, December is Fray Bentos's 2nd-clearest and 6th-windiest month. For the whole year in context, see Fray Bentos's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
18°
10th coldest
Rainfall
123 mm
8 wet days
Daylight
14 h 12 min
6:44 AM – 8:55 PM
Cloud cover
44%
2nd clearest
Wind
13 km/h
6th windiest
Solar energy
7.29 kWh/m²
Travel score
6.0
out of 10

Fray Bentos is capital city of the Río Negro Department, southwestern Uruguay.

Density
2,434/km²
people per km²
Founded
1859

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 28°C in the first days to 30°C by the end.

A typical December day in Fray Bentos reaches about 29°C in the afternoon and slips back to 18°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 34°C. Set against its neighbours, December runs about 3°C warmer than November and about 1°C cooler than January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12817
22817
32817
42817
52817
62817
72817
82817
92817
102817
112918
122918
132918
142918
152918
162918
172918
182918
192918
202918
212919
222919
233019
243019
253019
263019
273019
283019
293019
303020
313020

Fray Bentos weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 20°1017.413.95.4
Feb29° / 19°1097.713.25.9
Mar27° / 18°1157.912.37.0
Apr23° / 14°1317.911.27.3
May20° / 11°796.310.36.7
Jun17° / 686.49.95.7
Jul16° / 626.1105.5
Aug18° / 866.510.86.5
Sep20° / 11°887.111.86.8
Oct23° / 13°1199.312.87.1
Nov26° / 16°102713.77.3
Dec29° / 18°123814.16.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 37%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26139
36238
46238
56337
66337
76337
86436
96535
106535
116535
126634
136535
146535
156535
166535
176436
186436
196436
206337
216337
226337
236337
246337
256238
266238
276238
286238
296337
306337
316337

Chance of precipitation in December

Any precipitation

Fray Bentos gets around 123 mm of rain over 8 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 26% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
124
224
324
424
524
624
725
825
925
1025
1126
1226
1326
1427
1527
1628
1728
1828
1928
2028
2127
2227
2327
2426
2526
2626
2726
2826
2926
3025
3125

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the humid band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 29% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
12530291420
22530301420
32429301420
42429311420
52428311430
62327321530
72327321530
82326331630
92226331630
102125341730
112025341730
122024341840
131924341940
141824342040
151723342140
161623332350
171622332450
181522322560
191421322670
201421312770
211320312880
221220302890
2312202929100
2411202829110
2511192830120
2610192730121
2710192730131
2810192631141
299192630151
309192630151
318182630161

Wind in December

Winds average 13 km/h in December.

Across December, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in December

DaylightNight

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

Days grow by about 12 minutes over December. Sunrise moves from 6:42 AM to 6:52 AM, and sunset from 8:44 PM to 9:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.06:428:44
214.06:428:45
314.16:428:46
414.16:428:46
514.16:428:47
614.16:428:48
714.16:428:49
814.16:428:49
914.16:428:50
1014.16:438:51
1114.16:438:51
1214.26:438:52
1314.26:438:53
1414.26:438:53
1514.26:448:54
1614.26:448:55
1714.26:448:55
1814.26:458:56
1914.26:458:56
2014.26:468:57
2114.26:468:57
2214.26:478:58
2314.26:478:58
2414.26:478:59
2514.26:488:59
2614.26:499:00
2714.26:499:00
2814.26:509:00
2914.26:509:01
3014.26:519:01
3114.26:529:01

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 7.29 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.31 kWh/m² to a high of 7.29 kWh/m² in December across the year — December's 7.29 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.2Intense
27.2Intense
37.2Intense
47.3Intense
57.3Intense
67.3Intense
77.3Intense
87.3Intense
97.3Intense
107.3Intense
117.3Intense
127.3Intense
137.3Intense
147.3Intense
157.3Intense
167.3Intense
177.3Intense
187.3Intense
197.3Intense
207.3Intense
217.3Intense
227.2Intense
237.2Intense
247.2Intense
257.2Intense
267.2Intense
277.2Intense
287.2Intense
297.2Intense
307.2Intense
317.2Intense
Planning a trip in December

Is December a good time to visit Fray Bentos?

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

6.0
Sightseeing
8th-best month of the year
7.5
Beach & pool
1st-best month of the year

December is a reasonable time to visit Fray Bentos for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Fray Bentos in December

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

In December, Fray Bentos sees daytime highs around 29°C and nights near 18°C. Pack light clothes and sun protection. Worth having: rain gear. About 8 days see rain.

light clothessun protectionrain gear

UV index in Fray Bentos in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks 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 Fray Bentos 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
Feb11Extreme
Mar10Very high
Apr6High
May4Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec12Extreme
Location & terrain

Where is Fray Bentos?

Fray Bentos sits at 33.1°S, 58.3°W, 17 m above sea level, in Uruguay. The nearest listed city is Gualeguaychú, 23 km away.

MercedesDoloresConcepción del UruguayYoungPaysandúCarmelo

Topography around Fray Bentos

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

Within 3 km, the terrain around Fray Bentos has only modest variations in elevation — a maximum elevation change of 43 m around an average of 11 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 66 m; within 80 km, only modest variations in elevation — a maximum elevation change of 132 m.

The land around Fray Bentos is covered by water (35%) within 3 km, cropland (24%), water (23%) and grassland (22%) within 16 km, and cropland (43%) and grassland (29%) within 80 km.

3 km
43 m
16 km
66 m
80 km
132 m
treesgrasslandcroplandartificial surfaceswaterwetland
December weather nearby: Gualeguaychú 23 km · Mercedes 30 km · Dolores 47 km · Concepción del Uruguay 71 km · Young 79 km · Paysandú 91 km · Gualeguay 93 km · Carmelo 98 km

Uruguay travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F / I / L
230 V · 50 Hz
Prices
≈ 66% of US
price level, 2025
GDP per capita
$25,216
2025
Happiness
6.6 / 10
World Happiness, 2025
Homicide rate
11.2
per 100k, 2023
Road deaths
14.8
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 542
Religion
none 47%Roman Catholic 37%Protestant 15%atheist 10%

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 Fray Bentos (-33.1165°, -58.3107°, elevation 17 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).