La Rioja weather in May

In May, La Rioja sees average daytime highs of 20°C and overnight lows near 11°C, with 29 mm of rain across 5.5 wet days and about 10.5 hours of daylight. It is the 10th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 18°C by the end. The sky is clear or mostly clear about 43% of the time in May, and the air most often feels dry.

Daylight stretches from about 10 h 54 min at the start of May to 10 h 18 min by month's end. Set against the rest of the year, May is La Rioja's 11th-clearest and 11th-windiest month. For the whole year in context, see La Rioja's year-round climate.

Daytime high: 20°; 10th warmest
Overnight low: 11°; 4th coldest
Rainfall: 29 mm; 5.5 wet days
Daylight: 10 h 30 min; 8:08 AM – 6:40 PM
Cloud cover: 49%; 11th clearest
Wind: 7 km/h; 11th windiest
Solar energy: 3.15 kWh/m²
Travel score: 7.1; out of 10

La Rioja is city in Capital Department, La Rioja Province, Argentina.

Density: 13,116/km²; people per km²
Founded: 1591

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

← April La Rioja year-round climate June →Best places to visit in May

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 22°C in the first days to 18°C by the end.

A typical May day in La Rioja reaches about 20°C in the afternoon and slips back to 11°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 25°C. Set against its neighbours, May runs about 4°C cooler than April and about 3°C warmer than June.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	22	22	22	22	22	22	21	21	21	21	21	20	20	20	20	20	20	19	19	19	19	19	19	19	19	18	18	18	18	18	18
Avg low (°C)	13	13	13	13	13	12	12	12	12	12	12	12	11	11	11	11	11	10	10	10	10	10	10	9	9	9	9	9	9	9	8

	Avg high (°C)	Avg low (°C)
1	22	13
2	22	13
3	22	13
4	22	13
5	22	13
6	22	12
7	21	12
8	21	12
9	21	12
10	21	12
11	21	12
12	20	12
13	20	11
14	20	11
15	20	11
16	20	11
17	20	11
18	19	10
19	19	10
20	19	10
21	19	10
22	19	10
23	19	10
24	19	9
25	19	9
26	18	9
27	18	9
28	18	9
29	18	9
30	18	9
31	18	8

How May really feels in La Rioja

Once humidity and wind are folded in, May 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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

La Rioja 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.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	32° / 22°	102	11.2	13.7	3.9
Feb	31° / 21°	76	9.6	13.1	4.8
Mar	28° / 19°	78	9.8	12.2	6.1
Apr	24° / 15°	47	7.9	11.3	7.4
May	20° / 11°	29	5.5	10.5	7.1
Jun	17° / 7°	15	3.4	10.2	6.5
Jul	17° / 6°	10	2.2	10.3	7.0
Aug	21° / 8°	10	2.1	10.9	8.3
Sep	24° / 12°	24	3.4	11.8	8.5
Oct	28° / 16°	48	6	12.7	7.1
Nov	30° / 19°	61	7.7	13.5	5.3
Dec	32° / 21°	85	9.3	13.8	4.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 43%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	57	57	57	57	57	56	56	56	55	55	55	54	54	54	54	54	55	55	55	55	57	57	57	58	59	60	60	61	61	62	63
Cloudier (%)	43	43	43	43	43	44	44	44	45	45	45	46	46	46	46	46	45	45	45	45	43	43	43	42	41	40	40	39	39	38	37

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	57	43
6	56	44
7	56	44
8	56	44
9	55	45
10	55	45
11	55	45
12	54	46
13	54	46
14	54	46
15	54	46
16	54	46
17	55	45
18	55	45
19	55	45
20	55	45
21	57	43
22	57	43
23	57	43
24	58	42
25	59	41
26	60	40
27	60	40
28	61	39
29	61	39
30	62	38
31	63	37

Chance of precipitation in May

Any precipitation

La Rioja gets around 29 mm of rain over 5.5 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 18% and peaks near 22% on the wettest days. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	22	22	22	22	21	21	21	21	21	20	20	20	19	19	18	18	17	17	17	16	16	16	15	15	15	15	14	14	14	14	14

	Rain chance (%)
1	22
2	22
3	22
4	22
5	21
6	21
7	21
8	21
9	21
10	20
11	20
12	20
13	19
14	19
15	18
16	18
17	17
18	17
19	17
20	16
21	16
22	16
23	15
24	15
25	15
26	15
27	14
28	14
29	14
30	14
31	14

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 83% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	66	67	69	70	71	73	75	76	77	78	80	81	83	83	85	85	86	87	88	89	89	90	90	91	92	92	93	94	94	95	95
Comfortable (%)	23	22	21	20	20	19	18	18	17	17	16	16	15	15	14	14	13	13	12	11	11	10	10	9	8	8	7	6	6	5	5
Humid (%)	11	11	10	10	9	8	7	6	6	5	4	3	2	2	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0

	Dry (%)	Comfortable (%)	Humid (%)
1	66	23	11
2	67	22	11
3	69	21	10
4	70	20	10
5	71	20	9
6	73	19	8
7	75	18	7
8	76	18	6
9	77	17	6
10	78	17	5
11	80	16	4
12	81	16	3
13	83	15	2
14	83	15	2
15	85	14	1
16	85	14	1
17	86	13	1
18	87	13	0
19	88	12	0
20	89	11	0
21	89	11	0
22	90	10	0
23	90	10	0
24	91	9	0
25	92	8	0
26	92	8	0
27	93	7	0
28	94	6	0
29	94	6	0
30	95	5	0
31	95	5	0

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.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	7	calm
2	7	calm
3	7	calm
4	7	calm
5	7	calm
6	7	calm
7	7	calm
8	7	calm
9	7	calm
10	7	calm
11	7	calm
12	7	calm
13	7	calm
14	7	calm
15	7	calm
16	7	calm
17	7	calm
18	7	calm
19	7	calm
20	7	calm
21	7	calm
22	7	calm
23	7	calm
24	7	calm
25	7	calm
26	7	calm
27	7	calm
28	7	calm
29	7	calm
30	7	calm
31	7	calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 10 h 54 min at the start of May to 10 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over May. Sunrise moves from 7:58 AM to 8:17 AM, and sunset from 6:51 PM to 6:33 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	10.9	10.9	10.8	10.8	10.8	10.8	10.7	10.7	10.7	10.7	10.6	10.6	10.6	10.6	10.6	10.5	10.5	10.5	10.5	10.5	10.4	10.4	10.4	10.4	10.4	10.3	10.3	10.3	10.3	10.3	10.3
Sunrise (AM)	7:58	7:59	7:59	8:00	8:01	8:01	8:02	8:03	8:03	8:04	8:05	8:05	8:06	8:06	8:07	8:08	8:08	8:09	8:10	8:10	8:11	8:11	8:12	8:13	8:13	8:14	8:14	8:15	8:16	8:16	8:17
Sunset (PM)	6:51	6:50	6:49	6:48	6:48	6:47	6:46	6:45	6:44	6:44	6:43	6:42	6:42	6:41	6:40	6:40	6:39	6:38	6:38	6:37	6:37	6:36	6:36	6:35	6:35	6:35	6:34	6:34	6:34	6:33	6:33

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.9	7:58	6:51
2	10.9	7:59	6:50
3	10.8	7:59	6:49
4	10.8	8:00	6:48
5	10.8	8:01	6:48
6	10.8	8:01	6:47
7	10.7	8:02	6:46
8	10.7	8:03	6:45
9	10.7	8:03	6:44
10	10.7	8:04	6:44
11	10.6	8:05	6:43
12	10.6	8:05	6:42
13	10.6	8:06	6:42
14	10.6	8:06	6:41
15	10.6	8:07	6:40
16	10.5	8:08	6:40
17	10.5	8:08	6:39
18	10.5	8:09	6:38
19	10.5	8:10	6:38
20	10.5	8:10	6:37
21	10.4	8:11	6:37
22	10.4	8:11	6:36
23	10.4	8:12	6:36
24	10.4	8:13	6:35
25	10.4	8:13	6:35
26	10.3	8:14	6:35
27	10.3	8:14	6:34
28	10.3	8:15	6:34
29	10.3	8:16	6:34
30	10.3	8:16	6:33
31	10.3	8:17	6:33

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 3.15 kWh/m².

For context, solar energy here swings from a low near 3.01 kWh/m² to a high of 6.72 kWh/m² in December across the year — May's 3.15 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	3.5	3.5	3.4	3.4	3.4	3.4	3.3	3.3	3.3	3.2	3.2	3.2	3.2	3.1	3.1	3.1	3.1	3.1	3.1	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0	3.0
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	3.5	Moderate
2	3.5	Moderate
3	3.4	Moderate
4	3.4	Moderate
5	3.4	Moderate
6	3.4	Moderate
7	3.3	Moderate
8	3.3	Moderate
9	3.3	Moderate
10	3.2	Moderate
11	3.2	Moderate
12	3.2	Moderate
13	3.2	Moderate
14	3.1	Moderate
15	3.1	Moderate
16	3.1	Moderate
17	3.1	Moderate
18	3.1	Moderate
19	3.1	Moderate
20	3.0	Moderate
21	3.0	Moderate
22	3.0	Moderate
23	3.0	Moderate
24	3.0	Moderate
25	3.0	Moderate
26	3.0	Moderate
27	3.0	Moderate
28	3.0	Moderate
29	3.0	Moderate
30	3.0	Moderate
31	3.0	Moderate

Planning a trip in May

Hazard calendar for La Rioja

In seasonPeak

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

La Rioja's rainy season runs October–April, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is May a good time to visit La Rioja?

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

7.1

Sightseeing

4th-best month of the year

3.6

Beach & pool

10th-best month of the year

May is one of the better times to visit La Rioja for general sightseeing.

What to pack for La Rioja in May

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

In May, La Rioja sees daytime highs around 20°C and nights near 11°C. Little to plan around — just the basics. About 6 days see rain.

UV index in La Rioja in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in La Rioja peaks around January 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	14	14	12	7	5	4	4	5	7	11	13	13
Level	Extreme	Extreme	Extreme	High	Moderate	Moderate	Moderate	Moderate	Very high	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	14	Extreme
Mar	12	Extreme
Apr	7	High
May	5	Moderate
Jun	4	Moderate
Jul	4	Moderate
Aug	5	Moderate
Sep	7	Very high
Oct	11	Extreme
Nov	13	Extreme
Dec	13	Extreme

Location & terrain

Where is La Rioja?

La Rioja sits at 29.4°S, 66.9°W, 493 m above sea level, in Argentina. The nearest listed city is Chilecito, 68 km away.

Topography around La Rioja

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

Within 3 km, the terrain around La Rioja has only modest variations in elevation — a maximum elevation change of 141 m around an average of 516 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,895 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,858 m.

The land around La Rioja is covered by artificial surfaces (70%) within 3 km, shrubs (58%) and trees (24%) within 16 km, and shrubs (76%) within 80 km.

3 km

141 m

artificial surfaces 70%

16 km

1,895 m

shrubs 58%

80 km

3,858 m

shrubs 76%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

← April La Rioja year-round climate June →Best places to visit in May

May weather nearby: Chilecito 68 km · Aimogasta 95 km · Catamarca 148 km · San Isidro 153 km · Belén 197 km · Cruz del Eje 246 km · Aguilares 252 km · Deán Funes 266 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 La Rioja (-29.4133°, -66.8564°, elevation 493 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).

	Avg high (°C)	Avg low (°C)
1	22	13
2	22	13
3	22	13
4	22	13
5	22	13
6	22	12
7	21	12
8	21	12
9	21	12
10	21	12
11	21	12
12	20	12
13	20	11
14	20	11
15	20	11
16	20	11
17	20	11
18	19	10
19	19	10
20	19	10
21	19	10
22	19	10
23	19	10
24	19	9
25	19	9
26	18	9
27	18	9
28	18	9
29	18	9
30	18	9
31	18	8

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	57	43
6	56	44
7	56	44
8	56	44
9	55	45
10	55	45
11	55	45
12	54	46
13	54	46
14	54	46
15	54	46
16	54	46
17	55	45
18	55	45
19	55	45
20	55	45
21	57	43
22	57	43
23	57	43
24	58	42
25	59	41
26	60	40
27	60	40
28	61	39
29	61	39
30	62	38
31	63	37

	Rain chance (%)
1	22
2	22
3	22
4	22
5	21
6	21
7	21
8	21
9	21
10	20
11	20
12	20
13	19
14	19
15	18
16	18
17	17
18	17
19	17
20	16
21	16
22	16
23	15
24	15
25	15
26	15
27	14
28	14
29	14
30	14
31	14

	Dry (%)	Comfortable (%)	Humid (%)
1	66	23	11
2	67	22	11
3	69	21	10
4	70	20	10
5	71	20	9
6	73	19	8
7	75	18	7
8	76	18	6
9	77	17	6
10	78	17	5
11	80	16	4
12	81	16	3
13	83	15	2
14	83	15	2
15	85	14	1
16	85	14	1
17	86	13	1
18	87	13	0
19	88	12	0
20	89	11	0
21	89	11	0
22	90	10	0
23	90	10	0
24	91	9	0
25	92	8	0
26	92	8	0
27	93	7	0
28	94	6	0
29	94	6	0
30	95	5	0
31	95	5	0

	Avg high (°C)	Avg low (°C)
1	22	13
2	22	13
3	22	13
4	22	13
5	22	13
6	22	12
7	21	12
8	21	12
9	21	12
10	21	12
11	21	12
12	20	12
13	20	11
14	20	11
15	20	11
16	20	11
17	20	11
18	19	10
19	19	10
20	19	10
21	19	10
22	19	10
23	19	10
24	19	9
25	19	9
26	18	9
27	18	9
28	18	9
29	18	9
30	18	9
31	18	8

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	57	43
6	56	44
7	56	44
8	56	44
9	55	45
10	55	45
11	55	45
12	54	46
13	54	46
14	54	46
15	54	46
16	54	46
17	55	45
18	55	45
19	55	45
20	55	45
21	57	43
22	57	43
23	57	43
24	58	42
25	59	41
26	60	40
27	60	40
28	61	39
29	61	39
30	62	38
31	63	37

	Rain chance (%)
1	22
2	22
3	22
4	22
5	21
6	21
7	21
8	21
9	21
10	20
11	20
12	20
13	19
14	19
15	18
16	18
17	17
18	17
19	17
20	16
21	16
22	16
23	15
24	15
25	15
26	15
27	14
28	14
29	14
30	14
31	14

	Dry (%)	Comfortable (%)	Humid (%)
1	66	23	11
2	67	22	11
3	69	21	10
4	70	20	10
5	71	20	9
6	73	19	8
7	75	18	7
8	76	18	6
9	77	17	6
10	78	17	5
11	80	16	4
12	81	16	3
13	83	15	2
14	83	15	2
15	85	14	1
16	85	14	1
17	86	13	1
18	87	13	0
19	88	12	0
20	89	11	0
21	89	11	0
22	90	10	0
23	90	10	0
24	91	9	0
25	92	8	0
26	92	8	0
27	93	7	0
28	94	6	0
29	94	6	0
30	95	5	0
31	95	5	0

	Avg high (°C)	Avg low (°C)
1	22	13
2	22	13
3	22	13
4	22	13
5	22	13
6	22	12
7	21	12
8	21	12
9	21	12
10	21	12
11	21	12
12	20	12
13	20	11
14	20	11
15	20	11
16	20	11
17	20	11
18	19	10
19	19	10
20	19	10
21	19	10
22	19	10
23	19	10
24	19	9
25	19	9
26	18	9
27	18	9
28	18	9
29	18	9
30	18	9
31	18	8

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	57	43
6	56	44
7	56	44
8	56	44
9	55	45
10	55	45
11	55	45
12	54	46
13	54	46
14	54	46
15	54	46
16	54	46
17	55	45
18	55	45
19	55	45
20	55	45
21	57	43
22	57	43
23	57	43
24	58	42
25	59	41
26	60	40
27	60	40
28	61	39
29	61	39
30	62	38
31	63	37

	Rain chance (%)
1	22
2	22
3	22
4	22
5	21
6	21
7	21
8	21
9	21
10	20
11	20
12	20
13	19
14	19
15	18
16	18
17	17
18	17
19	17
20	16
21	16
22	16
23	15
24	15
25	15
26	15
27	14
28	14
29	14
30	14
31	14

	Dry (%)	Comfortable (%)	Humid (%)
1	66	23	11
2	67	22	11
3	69	21	10
4	70	20	10
5	71	20	9
6	73	19	8
7	75	18	7
8	76	18	6
9	77	17	6
10	78	17	5
11	80	16	4
12	81	16	3
13	83	15	2
14	83	15	2
15	85	14	1
16	85	14	1
17	86	13	1
18	87	13	0
19	88	12	0
20	89	11	0
21	89	11	0
22	90	10	0
23	90	10	0
24	91	9	0
25	92	8	0
26	92	8	0
27	93	7	0
28	94	6	0
29	94	6	0
30	95	5	0
31	95	5	0