Rosario de la Frontera weather in May

In May, Rosario de la Frontera sees average daytime highs of 20°C and overnight lows near 10°C, with 42 mm of rain across 9 wet days and about 10.8 hours of daylight. It is the 10th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 19°C by the end. The sky is clear or mostly clear about 35% of the time in May, and the air most often feels dry.

Daylight stretches from about 11 hours at the start of May to 10 h 30 min by month's end. Set against the rest of the year, May is Rosario de la Frontera's 6th-clearest and 9th-windiest month. For the whole year in context, see Rosario de la Frontera's year-round climate.

Daytime high
20°
10th warmest
Overnight low
10°
4th coldest
Rainfall
42 mm
9 wet days
Daylight
10 h 42 min
7:54 AM – 6:38 PM
Cloud cover
56%
6th clearest
Wind
7 km/h
9th windiest
Solar energy
3.16 kWh/m²
Travel score
6.4
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 19°C by the end.

A typical May day in Rosario de la Frontera reaches about 20°C in the afternoon and slips back to 10°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 25°C. Set against its neighbours, May runs about 3°C cooler than April and about 1°C warmer than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12112
22111
32111
42111
52111
62011
72011
82011
92011
102011
112010
122010
132010
142010
152010
161910
171910
18199
19199
20199
21199
22199
23199
24199
25198
26198
27198
28198
29198
30198
31198

Rosario de la Frontera weather by month

How May compares with the rest of the year at a glance. May is the 10th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 18°24420.213.44.9
Feb26° / 17°19918.112.95.1
Mar24° / 16°16918.312.25.5
Apr22° / 13°9113.411.46.1
May20° / 10°42910.86.4
Jun18° / 185.310.46.9
Jul19° / 13410.67.4
Aug22° / 153.511.18.1
Sep24° / 10°255.111.88.0
Oct26° / 14°7811.712.66.6
Nov26° / 15°12214.813.35.8
Dec27° / 17°19618.513.65.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 12% of May, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24456
34456
44555
54555
64456
74555
84555
94654
104654
114654
124753
134654
144753
154852
164753
174852
184852
194852
204951
214951
224951
234951
244951
255050
265050
275149
285248
295248
305248
315248

Chance of precipitation in May

Any precipitation

Rosario de la Frontera gets around 42 mm of rain over 9 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 30% and peaks near 38% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
237
337
436
535
635
734
834
934
1033
1133
1232
1332
1431
1531
1630
1730
1829
1929
2028
2127
2226
2326
2425
2524
2623
2723
2822
2922
3021
3121

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 73% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15428171
25527171
35627161
45826151
55926141
66026131
76126121
86326110
9662590
10672580
11692470
12702460
13712450
14722350
15732340
16742240
17762130
18762130
19782020
20791920
21801820
22811720
23821620
24831610
25841510
26851410
27851410
28861310
29871210
30871210
31881110

Wind in May

Winds average 7 km/h in May.

Across May, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 hours at the start of May to 10 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over May. Sunrise moves from 7:46 AM to 8:02 AM, and sunset from 6:48 PM to 6:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.07:466:48
211.07:466:48
311.07:476:47
411.07:476:46
511.07:486:45
610.97:486:45
710.97:496:44
810.97:506:43
910.97:506:43
1010.97:516:42
1110.87:516:41
1210.87:526:41
1310.87:526:40
1410.87:536:40
1510.87:536:39
1610.77:546:38
1710.77:546:38
1810.77:556:37
1910.77:556:37
2010.77:566:36
2110.77:576:36
2210.67:576:36
2310.67:586:35
2410.67:586:35
2510.67:596:35
2610.67:596:34
2710.68:006:34
2810.68:006:34
2910.58:016:33
3010.58:016:33
3110.58:026:33

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.16 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 3.16 kWh/m² to a high of 5.87 kWh/m² in December across the year — May's 3.16 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.3Moderate
23.3Moderate
33.3Moderate
43.3Moderate
53.2Moderate
63.2Moderate
73.2Moderate
83.2Moderate
93.2Moderate
103.2Moderate
113.2Moderate
123.1Moderate
133.1Moderate
143.1Moderate
153.1Moderate
163.1Moderate
173.1Moderate
183.1Moderate
193.1Moderate
203.1Moderate
213.1Moderate
223.1Moderate
233.1Moderate
243.1Moderate
253.1Moderate
263.1Moderate
273.2Moderate
283.2Moderate
293.2Moderate
303.2Moderate
313.2Moderate
Planning a trip in May

Hazard calendar for Rosario de la Frontera

In seasonPeak

None of Rosario de la Frontera's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Rosario de la Frontera's monsoon runs November–March, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Rosario de la Frontera?

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

6.4
Sightseeing
6th-best month of the year
3.1
Beach & pool
10th-best month of the year

May is a reasonable time to visit Rosario de la Frontera for sightseeing.

What to pack for Rosario de la Frontera in May

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

In May, Rosario de la Frontera sees daytime highs around 20°C and nights near 10°C. Worth packing: rain gear. About 9 days see rain.

rain gear

UV index in Rosario de la Frontera in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 6 — enough to warrant sun protection. 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 18UV 15Jul 10UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr8Very high
May6High
Jun5Moderate
Jul5Moderate
Aug7High
Sep9Very high
Oct12Extreme
Nov13Extreme
Dec14Extreme
Location & terrain

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.

3 km
88 m
16 km
975 m
80 km
3,471 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: San José de Metán 34 km · Cafayate 105 km · Tafí Viejo 108 km · Rosario de Lerma 109 km · San José de los Cerrillos 113 km · Joaquín V. González 114 km · Alderetes 115 km · San Miguel de Tucuman 116 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 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. 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).