San Luis weather in April

In April, San Luis sees average daytime highs of 22°C and overnight lows near 11°C, with 53 mm of precipitation across 7 wet days and about 11.2 hours of daylight. It is the 7th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 21°C by the end. The sky is clear or mostly clear about 52% of the time in April, and the air most often feels dry.

Daylight stretches from about 11 h 42 min at the start of April to 10 h 42 min by month's end. Set against the rest of the year, April is San Luis's 11th-clearest and 10th-windiest month. For the whole year in context, see San Luis's year-round climate.

Daytime high: 22°; 7th warmest
Overnight low: 11°; 6th coldest
Precipitation: 53 mm; 7 wet days
Daylight: 11 h 12 min; 7:50 AM – 7:01 PM
Cloud cover: 42%; 11th clearest
Wind: 10 km/h; 10th windiest
Solar energy: 3.89 kWh/m²
Travel score: 7.4; out of 10

San Luis is capital city of the San Luis Province in the Cuyo region of Argentina.

Founded: 1594

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

← March San Luis year-round climate May →Best places to visit in April

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 23°C in the first days to 21°C by the end.

A typical April day in San Luis reaches about 22°C in the afternoon and slips back to 11°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 27°C. Set against its neighbours, April runs about 4°C cooler than March and about 4°C warmer than May.

	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
Avg high (°C)	23	23	23	23	23	23	23	23	23	22	22	22	22	22	22	22	22	22	22	22	21	21	21	21	21	21	21	21	21	20
Avg low (°C)	13	13	13	13	13	13	12	12	12	12	12	12	12	12	11	11	11	11	11	11	11	11	11	10	10	10	10	10	10	10

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

San Luis weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 7th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	29° / 18°	107	13.3	14	5.3
Feb	28° / 17°	81	10.9	13.2	6.3
Mar	26° / 15°	80	10.1	12.3	7.1
Apr	22° / 11°	53	7	11.2	7.4
May	18° / 8°	25	4.2	10.3	6.8
Jun	16° / 5°	8	1.9	9.8	6.3
Jul	16° / 4°	9	2.1	10	6.1
Aug	18° / 6°	15	2.6	10.8	7.4
Sep	21° / 9°	30	4.6	11.8	7.6
Oct	24° / 12°	66	8.7	12.8	7.5
Nov	26° / 14°	89	11.7	13.7	6.7
Dec	28° / 17°	102	13.1	14.2	5.8

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 34%.

	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
Clearer (%)	67	67	67	67	67	67	67	68	68	68	69	69	69	69	68	68	68	67	67	67	65	65	65	63	63	63	62	62	61	61
Cloudier (%)	33	33	33	33	33	33	33	32	32	32	31	31	31	31	32	32	32	33	33	33	35	35	35	37	37	37	38	38	39	39

	Clearer (%)	Cloudier (%)
1	67	33
2	67	33
3	67	33
4	67	33
5	67	33
6	67	33
7	67	33
8	68	32
9	68	32
10	68	32
11	69	31
12	69	31
13	69	31
14	69	31
15	68	32
16	68	32
17	68	32
18	67	33
19	67	33
20	67	33
21	65	35
22	65	35
23	65	35
24	63	37
25	63	37
26	63	37
27	62	38
28	62	38
29	61	39
30	61	39

Chance of precipitation in April

Any precipitation

San Luis gets around 53 mm of rain and snow over 7 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 23% and peaks near 29% on the wettest days, and about 0 day brings snow. 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
Rain chance (%)	29	29	29	28	28	27	27	26	26	25	24	23	23	22	22	22	21	21	21	21	20	20	19	19	18	18	17	17	17	16

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

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 80% 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
Dry (%)	66	68	68	70	71	72	73	74	75	76	78	79	80	81	82	83	84	84	85	86	87	87	87	88	88	88	88	87	87	87
Comfortable (%)	23	22	22	21	20	20	19	18	18	17	16	15	15	14	13	13	12	12	12	12	11	11	11	11	11	11	11	12	12	12
Humid (%)	10	9	9	8	8	7	7	7	6	6	5	5	4	4	4	3	3	3	2	2	2	2	2	1	1	1	1	1	1	1
Muggy (%)	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	0	0	0	0	0	0	0	0	0	0	0

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	66	23	10	1
2	68	22	9	1
3	68	22	9	1
4	70	21	8	1
5	71	20	8	1
6	72	20	7	1
7	73	19	7	1
8	74	18	7	1
9	75	18	6	1
10	76	17	6	1
11	78	16	5	1
12	79	15	5	1
13	80	15	4	1
14	81	14	4	1
15	82	13	4	1
16	83	13	3	1
17	84	12	3	1
18	84	12	3	1
19	85	12	2	1
20	86	12	2	0
21	87	11	2	0
22	87	11	2	0
23	87	11	2	0
24	88	11	1	0
25	88	11	1	0
26	88	11	1	0
27	88	11	1	0
28	87	12	1	0
29	87	12	1	0
30	87	12	1	0

Wind in April

Winds average 10 km/h in April.

Across April, 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
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
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

	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

Sunrise & sunset in April

DaylightNight

Daylight runs from about 11 h 42 min at the start of April to 10 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over April. Sunrise moves from 7:39 AM to 8:01 AM, and sunset from 7:21 PM to 6:44 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
Daylight (h)	11.7	11.7	11.6	11.6	11.6	11.5	11.5	11.4	11.4	11.4	11.3	11.3	11.3	11.2	11.2	11.2	11.1	11.1	11.1	11.0	11.0	11.0	10.9	10.9	10.9	10.8	10.8	10.8	10.8	10.7
Sunrise (AM)	7:39	7:40	7:41	7:41	7:42	7:43	7:44	7:44	7:45	7:46	7:47	7:47	7:48	7:49	7:50	7:50	7:51	7:52	7:53	7:53	7:54	7:55	7:56	7:56	7:57	7:58	7:59	7:59	8:00	8:01
Sunset (PM)	7:21	7:19	7:18	7:17	7:15	7:14	7:13	7:11	7:10	7:09	7:07	7:06	7:05	7:03	7:02	7:01	7:00	6:58	6:57	6:56	6:55	6:53	6:52	6:51	6:50	6:49	6:48	6:47	6:45	6:44

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.7	7:39	7:21
2	11.7	7:40	7:19
3	11.6	7:41	7:18
4	11.6	7:41	7:17
5	11.6	7:42	7:15
6	11.5	7:43	7:14
7	11.5	7:44	7:13
8	11.4	7:44	7:11
9	11.4	7:45	7:10
10	11.4	7:46	7:09
11	11.3	7:47	7:07
12	11.3	7:47	7:06
13	11.3	7:48	7:05
14	11.2	7:49	7:03
15	11.2	7:50	7:02
16	11.2	7:50	7:01
17	11.1	7:51	7:00
18	11.1	7:52	6:58
19	11.1	7:53	6:57
20	11.0	7:53	6:56
21	11.0	7:54	6:55
22	11.0	7:55	6:53
23	10.9	7:56	6:52
24	10.9	7:56	6:51
25	10.9	7:57	6:50
26	10.8	7:58	6:49
27	10.8	7:59	6:48
28	10.8	7:59	6:47
29	10.8	8:00	6:45
30	10.7	8:01	6:44

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 3.89 kWh/m².

For context, solar energy here swings from a low near 2.78 kWh/m² to a high of 7.59 kWh/m² in December across the year — April's 3.89 kWh/m² falls in the middle.

	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
Solar energy (kWh/m²)	4.4	4.3	4.3	4.3	4.2	4.2	4.2	4.2	4.1	4.1	4.1	4.0	4.0	4.0	4.0	3.9	3.9	3.9	3.9	3.8	3.8	3.8	3.7	3.7	3.6	3.6	3.6	3.5	3.5	3.5
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	4.4	Bright
2	4.3	Bright
3	4.3	Bright
4	4.3	Bright
5	4.2	Bright
6	4.2	Bright
7	4.2	Bright
8	4.2	Bright
9	4.1	Bright
10	4.1	Bright
11	4.1	Bright
12	4.0	Bright
13	4.0	Bright
14	4.0	Bright
15	4.0	Moderate
16	3.9	Moderate
17	3.9	Moderate
18	3.9	Moderate
19	3.9	Moderate
20	3.8	Moderate
21	3.8	Moderate
22	3.8	Moderate
23	3.7	Moderate
24	3.7	Moderate
25	3.6	Moderate
26	3.6	Moderate
27	3.6	Moderate
28	3.5	Moderate
29	3.5	Moderate
30	3.5	Moderate

Planning a trip in April

Hazard calendar for San Luis

In seasonPeak

In April, San Luis sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

San Luis'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 April a good time to visit San Luis?

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

7.4

Sightseeing

3rd-best month of the year

5.1

Beach & pool

7th-best month of the year

April is one of the better times to visit San Luis for general sightseeing.

What to pack for San Luis in April

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

In April, San Luis sees daytime highs around 22°C and nights near 11°C. Little to plan around — just the basics. About 7 days see rain.

UV index in San Luis in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 San Luis peaks around January 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 3 (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	13	10	6	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	6	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 Luis?

San Luis sits at 33.3°S, 66.3°W, 729 m above sea level, in Argentina. The nearest listed city is Villa Mercedes, 91 km away.

Topography around San Luis

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

Within 3 km, the terrain around San Luis has only modest variations in elevation — a maximum elevation change of 121 m around an average of 743 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,416 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,820 m.

The land around San Luis is covered by artificial surfaces (72%) within 3 km, shrubs (50%) and grassland (24%) within 16 km, and shrubs (59%) and grassland (22%) within 80 km.

3 km

121 m

artificial surfaces 72%

16 km

1,416 m

shrubs 50%

80 km

1,820 m

shrubs 59%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

← March San Luis year-round climate May →Best places to visit in April

April weather nearby: Villa Mercedes 91 km · Villa Dolores 184 km · Río Cuarto 184 km · Rivadavia 199 km · San Martín 201 km · Embalse 217 km · Rodeo del Medio 222 km · General Alvear 226 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 Luis (-33.2914°, -66.3247°, elevation 729 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	23	13
2	23	13
3	23	13
4	23	13
5	23	13
6	23	13
7	23	12
8	23	12
9	23	12
10	22	12
11	22	12
12	22	12
13	22	12
14	22	12
15	22	11
16	22	11
17	22	11
18	22	11
19	22	11
20	22	11
21	21	11
22	21	11
23	21	11
24	21	10
25	21	10
26	21	10
27	21	10
28	21	10
29	21	10
30	20	10

	Clearer (%)	Cloudier (%)
1	67	33
2	67	33
3	67	33
4	67	33
5	67	33
6	67	33
7	67	33
8	68	32
9	68	32
10	68	32
11	69	31
12	69	31
13	69	31
14	69	31
15	68	32
16	68	32
17	68	32
18	67	33
19	67	33
20	67	33
21	65	35
22	65	35
23	65	35
24	63	37
25	63	37
26	63	37
27	62	38
28	62	38
29	61	39
30	61	39

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	66	23	10	1
2	68	22	9	1
3	68	22	9	1
4	70	21	8	1
5	71	20	8	1
6	72	20	7	1
7	73	19	7	1
8	74	18	7	1
9	75	18	6	1
10	76	17	6	1
11	78	16	5	1
12	79	15	5	1
13	80	15	4	1
14	81	14	4	1
15	82	13	4	1
16	83	13	3	1
17	84	12	3	1
18	84	12	3	1
19	85	12	2	1
20	86	12	2	0
21	87	11	2	0
22	87	11	2	0
23	87	11	2	0
24	88	11	1	0
25	88	11	1	0
26	88	11	1	0
27	88	11	1	0
28	87	12	1	0
29	87	12	1	0
30	87	12	1	0

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

	Clearer (%)	Cloudier (%)
1	67	33
2	67	33
3	67	33
4	67	33
5	67	33
6	67	33
7	67	33
8	68	32
9	68	32
10	68	32
11	69	31
12	69	31
13	69	31
14	69	31
15	68	32
16	68	32
17	68	32
18	67	33
19	67	33
20	67	33
21	65	35
22	65	35
23	65	35
24	63	37
25	63	37
26	63	37
27	62	38
28	62	38
29	61	39
30	61	39

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	66	23	10	1
2	68	22	9	1
3	68	22	9	1
4	70	21	8	1
5	71	20	8	1
6	72	20	7	1
7	73	19	7	1
8	74	18	7	1
9	75	18	6	1
10	76	17	6	1
11	78	16	5	1
12	79	15	5	1
13	80	15	4	1
14	81	14	4	1
15	82	13	4	1
16	83	13	3	1
17	84	12	3	1
18	84	12	3	1
19	85	12	2	1
20	86	12	2	0
21	87	11	2	0
22	87	11	2	0
23	87	11	2	0
24	88	11	1	0
25	88	11	1	0
26	88	11	1	0
27	88	11	1	0
28	87	12	1	0
29	87	12	1	0
30	87	12	1	0

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

	Clearer (%)	Cloudier (%)
1	67	33
2	67	33
3	67	33
4	67	33
5	67	33
6	67	33
7	67	33
8	68	32
9	68	32
10	68	32
11	69	31
12	69	31
13	69	31
14	69	31
15	68	32
16	68	32
17	68	32
18	67	33
19	67	33
20	67	33
21	65	35
22	65	35
23	65	35
24	63	37
25	63	37
26	63	37
27	62	38
28	62	38
29	61	39
30	61	39

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

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	66	23	10	1
2	68	22	9	1
3	68	22	9	1
4	70	21	8	1
5	71	20	8	1
6	72	20	7	1
7	73	19	7	1
8	74	18	7	1
9	75	18	6	1
10	76	17	6	1
11	78	16	5	1
12	79	15	5	1
13	80	15	4	1
14	81	14	4	1
15	82	13	4	1
16	83	13	3	1
17	84	12	3	1
18	84	12	3	1
19	85	12	2	1
20	86	12	2	0
21	87	11	2	0
22	87	11	2	0
23	87	11	2	0
24	88	11	1	0
25	88	11	1	0
26	88	11	1	0
27	88	11	1	0
28	87	12	1	0
29	87	12	1	0
30	87	12	1	0