San Rafael weather in May

In May, San Rafael sees average daytime highs of 18°C and overnight lows near 7°C, with 31 mm of rain across 5 wet days and about 10.2 hours of daylight. It is the 9th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 16°C by the end. The sky is clear or mostly clear about 46% of the time in May, and the air most often feels dry.

Daylight stretches from about 10 h 36 min at the start of May to 9 h 54 min by month's end. Set against the rest of the year, May is San Rafael's 12th-clearest and 12th-windiest month. For the whole year in context, see San Rafael's year-round climate.

Daytime high: 18°; 9th warmest
Overnight low: 7°; 4th coldest
Rainfall: 31 mm; 5 wet days
Daylight: 10 h 12 min; 8:24 AM – 6:35 PM
Cloud cover: 49%; 12th clearest
Wind: 10 km/h; 12th windiest
Solar energy: 2.96 kWh/m²
Travel score: 6.6; out of 10

San Rafael is city in Mendoza Province, Argentina.

Founded: 1805

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

← April San Rafael 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 20°C in the first days to 16°C by the end.

A typical May day in San Rafael reaches about 18°C in the afternoon and slips back to 7°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 23°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)	20	20	20	20	20	19	19	19	19	19	19	19	18	18	18	18	18	18	17	17	17	17	17	17	17	17	17	16	16	16	16
Avg low (°C)	9	8	8	8	8	8	8	8	8	8	8	7	7	7	7	7	7	7	7	6	6	6	6	6	6	6	5	5	5	5	5

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

How May really feels in San Rafael

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.

San Rafael weather by month

How May compares with the rest of the year at a glance. May is the 9th-warmest and 8th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	32° / 18°	46	8.9	0	14.1	4.6
Feb	30° / 17°	47	7.1	0	13.3	5.6
Mar	27° / 15°	48	6.8	0	12.3	7.2
Apr	22° / 10°	42	6	0	11.2	7.7
May	18° / 7°	31	5	0	10.2	6.6
Jun	15° / 4°	18	3.7	0.1	9.7	5.6
Jul	15° / 3°	17	3.2	0.6	9.9	5.5
Aug	18° / 4°	22	3.4	0.3	10.7	6.9
Sep	21° / 8°	28	4.7	0.2	11.8	7.5
Oct	24° / 11°	60	7.6	0	12.9	7.7
Nov	28° / 14°	53	8	0	13.8	6.8
Dec	31° / 17°	53	8.7	0	14.3	5.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 41%.

	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 (%)	64	63	63	63	63	61	61	61	60	59	58	58	57	56	56	55	55	55	55	55	55	55	56	56	57	57	58	60	61	62	63
Cloudier (%)	36	37	37	37	37	39	39	39	40	41	42	42	43	44	44	45	45	45	45	45	45	45	44	44	43	43	42	40	39	38	37

	Clearer (%)	Cloudier (%)
1	64	36
2	63	37
3	63	37
4	63	37
5	63	37
6	61	39
7	61	39
8	61	39
9	60	40
10	59	41
11	58	42
12	58	42
13	57	43
14	56	44
15	56	44
16	55	45
17	55	45
18	55	45
19	55	45
20	55	45
21	55	45
22	55	45
23	56	44
24	56	44
25	57	43
26	57	43
27	58	42
28	60	40
29	61	39
30	62	38
31	63	37

Chance of precipitation in May

Any precipitation

San Rafael gets around 31 mm of rain over 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 16% and peaks near 18% on the wettest days.

	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 (%)	16	16	16	16	16	17	17	17	17	18	18	18	18	18	18	18	18	18	18	17	17	16	16	16	15	15	14	14	13	13	13

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

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 99% 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 (%)	98	98	98	98	98	98	98	99	99	99	99	99	99	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100
Comfortable (%)	2	2	2	2	2	2	2	1	1	1	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	99	1
9	99	1
10	99	1
11	99	1
12	99	1
13	99	1
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0
31	100	0

Wind in May

Winds average 10 km/h in May, the calmest month.

Across May, daily wind ranges from about 10 km/h on the calmest days to 10 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)	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10
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	10	calm
2	10	calm
3	10	calm
4	10	calm
5	10	calm
6	10	calm
7	10	calm
8	10	calm
9	10	calm
10	10	calm
11	10	calm
12	10	calm
13	10	calm
14	10	calm
15	10	calm
16	10	calm
17	10	calm
18	10	calm
19	10	calm
20	10	calm
21	10	calm
22	10	calm
23	10	calm
24	10	calm
25	10	calm
26	10	calm
27	10	calm
28	10	calm
29	10	calm
30	10	calm
31	10	calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 10 h 36 min at the start of May to 9 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over May. Sunrise moves from 8:12 AM to 8:35 AM, and sunset from 6:49 PM to 6:27 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)	10.6	10.6	10.6	10.5	10.5	10.5	10.4	10.4	10.4	10.4	10.3	10.3	10.3	10.2	10.2	10.2	10.2	10.1	10.1	10.1	10.1	10.1	10.0	10.0	10.0	10.0	9.9	9.9	9.9	9.9	9.9
Sunrise (AM)	8:12	8:12	8:13	8:14	8:15	8:16	8:17	8:17	8:18	8:19	8:20	8:21	8:21	8:22	8:23	8:24	8:24	8:25	8:26	8:27	8:28	8:28	8:29	8:30	8:30	8:31	8:32	8:33	8:33	8:34	8:35
Sunset (PM)	6:49	6:48	6:47	6:46	6:45	6:44	6:43	6:42	6:41	6:40	6:40	6:39	6:38	6:37	6:36	6:35	6:35	6:34	6:33	6:33	6:32	6:31	6:31	6:30	6:30	6:29	6:29	6:28	6:28	6:27	6:27

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.6	8:12	6:49
2	10.6	8:12	6:48
3	10.6	8:13	6:47
4	10.5	8:14	6:46
5	10.5	8:15	6:45
6	10.5	8:16	6:44
7	10.4	8:17	6:43
8	10.4	8:17	6:42
9	10.4	8:18	6:41
10	10.4	8:19	6:40
11	10.3	8:20	6:40
12	10.3	8:21	6:39
13	10.3	8:21	6:38
14	10.2	8:22	6:37
15	10.2	8:23	6:36
16	10.2	8:24	6:35
17	10.2	8:24	6:35
18	10.1	8:25	6:34
19	10.1	8:26	6:33
20	10.1	8:27	6:33
21	10.1	8:28	6:32
22	10.1	8:28	6:31
23	10.0	8:29	6:31
24	10.0	8:30	6:30
25	10.0	8:30	6:30
26	10.0	8:31	6:29
27	9.9	8:32	6:29
28	9.9	8:33	6:28
29	9.9	8:33	6:28
30	9.9	8:34	6:27
31	9.9	8:35	6:27

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 2.96 kWh/m².

For context, solar energy here swings from a low near 2.7 kWh/m² to a high of 8.03 kWh/m² in December across the year — May's 2.96 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	3.4	3.4	3.3	3.3	3.3	3.2	3.2	3.1	3.1	3.1	3.0	3.0	3.0	2.9	2.9	2.9	2.9	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8	2.8
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	3.4	Moderate
3	3.4	Moderate
4	3.3	Moderate
5	3.3	Moderate
6	3.3	Moderate
7	3.2	Moderate
8	3.2	Moderate
9	3.1	Moderate
10	3.1	Moderate
11	3.1	Moderate
12	3.0	Moderate
13	3.0	Moderate
14	3.0	Moderate
15	2.9	Moderate
16	2.9	Moderate
17	2.9	Moderate
18	2.9	Moderate
19	2.8	Moderate
20	2.8	Moderate
21	2.8	Moderate
22	2.8	Moderate
23	2.8	Moderate
24	2.8	Moderate
25	2.8	Moderate
26	2.8	Moderate
27	2.8	Moderate
28	2.8	Moderate
29	2.8	Moderate
30	2.8	Moderate
31	2.8	Moderate

Planning a trip in May

Is May a good time to visit San Rafael?

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

6.6

Sightseeing

7th-best month of the year

2.3

Beach & pool

9th-best month of the year

May is a reasonable time to visit San Rafael for sightseeing.

What to pack for San Rafael in May

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

In May, San Rafael sees daytime highs around 18°C and nights near 7°C. Worth packing: a warm layer. About 5 days see rain.

a warm layer

UV index in San Rafael in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Rafael peaks around January 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	14	13	10	5	4	3	3	4	6	10	12	13
Level	Extreme	Extreme	Extreme	High	Moderate	Moderate	Moderate	Moderate	High	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	13	Extreme
Mar	10	Extreme
Apr	5	High
May	4	Moderate
Jun	3	Moderate
Jul	3	Moderate
Aug	4	Moderate
Sep	6	High
Oct	10	Very high
Nov	12	Extreme
Dec	13	Extreme

Location & terrain

Where is San Rafael?

San Rafael sits at 34.6°S, 68.3°W, 690 m above sea level, in Argentina. The nearest listed city is General Alvear, 71 km away.

Topography around San Rafael

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

Within 3 km, the terrain around San Rafael has only modest variations in elevation — a maximum elevation change of 61 m around an average of 696 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 276 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,885 m.

The land around San Rafael is covered by artificial surfaces (59%) and grassland (27%) within 3 km, grassland (54%) and shrubs (33%) within 16 km, and shrubs (62%) and grassland (32%) within 80 km.

3 km

61 m

artificial surfaces 59%

16 km

276 m

grassland 54%

80 km

1,885 m

shrubs 62%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

← April San Rafael year-round climate June →Best places to visit in May

May weather nearby: General Alvear 71 km · Tunuyán 131 km · Malargüe 149 km · Tupungato 158 km · Rivadavia 159 km · San Martín 171 km · Perdriel 179 km · Rodeo del Medio 183 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 San Rafael (-34.6153°, -68.3324°, elevation 690 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	20	9
2	20	8
3	20	8
4	20	8
5	20	8
6	19	8
7	19	8
8	19	8
9	19	8
10	19	8
11	19	8
12	19	7
13	18	7
14	18	7
15	18	7
16	18	7
17	18	7
18	18	7
19	17	7
20	17	6
21	17	6
22	17	6
23	17	6
24	17	6
25	17	6
26	17	6
27	17	5
28	16	5
29	16	5
30	16	5
31	16	5

	Clearer (%)	Cloudier (%)
1	64	36
2	63	37
3	63	37
4	63	37
5	63	37
6	61	39
7	61	39
8	61	39
9	60	40
10	59	41
11	58	42
12	58	42
13	57	43
14	56	44
15	56	44
16	55	45
17	55	45
18	55	45
19	55	45
20	55	45
21	55	45
22	55	45
23	56	44
24	56	44
25	57	43
26	57	43
27	58	42
28	60	40
29	61	39
30	62	38
31	63	37

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

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	99	1
9	99	1
10	99	1
11	99	1
12	99	1
13	99	1
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0
31	100	0

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

	Clearer (%)	Cloudier (%)
1	64	36
2	63	37
3	63	37
4	63	37
5	63	37
6	61	39
7	61	39
8	61	39
9	60	40
10	59	41
11	58	42
12	58	42
13	57	43
14	56	44
15	56	44
16	55	45
17	55	45
18	55	45
19	55	45
20	55	45
21	55	45
22	55	45
23	56	44
24	56	44
25	57	43
26	57	43
27	58	42
28	60	40
29	61	39
30	62	38
31	63	37

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

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	99	1
9	99	1
10	99	1
11	99	1
12	99	1
13	99	1
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0
31	100	0

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

	Clearer (%)	Cloudier (%)
1	64	36
2	63	37
3	63	37
4	63	37
5	63	37
6	61	39
7	61	39
8	61	39
9	60	40
10	59	41
11	58	42
12	58	42
13	57	43
14	56	44
15	56	44
16	55	45
17	55	45
18	55	45
19	55	45
20	55	45
21	55	45
22	55	45
23	56	44
24	56	44
25	57	43
26	57	43
27	58	42
28	60	40
29	61	39
30	62	38
31	63	37

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

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	99	1
9	99	1
10	99	1
11	99	1
12	99	1
13	99	1
14	100	0
15	100	0
16	100	0
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	100	0
25	100	0
26	100	0
27	100	0
28	100	0
29	100	0
30	100	0
31	100	0