General José de San Martín weather in April

In April, General José de San Martín sees average daytime highs of 27°C and overnight lows near 18°C, with 151 mm of rain across 10 wet days and about 11.4 hours of daylight. It is the 7th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 26°C by the end. The sky is clear or mostly clear about 42% of the time in April, and the air most often feels muggy.

Daylight stretches from about 11 h 48 min at the start of April to 11 hours by month's end. Set against the rest of the year, April is General José de San Martín's 7th-clearest and 9th-windiest month. For the whole year in context, see General José de San Martín's year-round climate.

Daytime high
27°
7th warmest
Overnight low
18°
7th coldest
Rainfall
151 mm
10 wet days
Daylight
11 h 24 min
7:16 AM – 6:39 PM
Cloud cover
51%
7th clearest
Wind
11 km/h
9th windiest
Solar energy
4.04 kWh/m²
Travel score
6.5
out of 10

General José de San Martín is city in Chaco, Argentina.

Density
398/km²
people per km²

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 28°C in the first days to 26°C by the end.

A typical April day in General José de San Martín reaches about 27°C in the afternoon and slips back to 18°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 33°C. Set against its neighbours, April runs about 3°C cooler than March and about 4°C warmer than May.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12919
22819
32819
42819
52819
62819
72818
82818
92818
102818
112818
122718
132718
142718
152718
162718
172717
182717
192717
202617
212617
222617
232617
242617
252617
262617
272617
282616
292516
302516

How April really feels in General José de San Martín

Once humidity and wind are folded in, April 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

General José de San Martín weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 22°11911.313.53.7
Feb32° / 22°12610.712.94.1
Mar30° / 20°1241112.25.0
Apr27° / 18°1511011.46.5
May23° / 14°948.910.77.1
Jun22° / 13°707.810.46.9
Jul21° / 11°536.510.57.3
Aug24° / 13°586.411.17.8
Sep26° / 15°87811.87.2
Oct28° / 18°15411.312.65.9
Nov30° / 19°16210.713.35.2
Dec32° / 21°15010.813.64.2

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 42% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 13% of April, with mostly cloudy or overcast conditions the remaining 45%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25743
35743
45743
55743
65743
75743
85644
95644
105644
115644
125545
135545
145446
155446
165446
175446
185446
195347
205347
215347
225347
235347
245347
255347
265347
275347
285347
295347
305446

Chance of precipitation in April

Any precipitation

General José de San Martín gets around 151 mm of rain over 10 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 33% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
132
232
332
432
532
632
732
833
933
1033
1133
1233
1333
1433
1533
1634
1734
1834
1934
2034
2134
2234
2333
2433
2533
2633
2732
2832
2931
3031

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the muggy band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 50% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
16122232262
26122231262
37122231262
47132230262
58132129262
68142129262
79142128262
89152128253
910152027253
1011152027243
1111162027233
1212162027223
1312162028212
1413162028202
1513162029202
1613162129192
1713162129182
1814162130181
1914162130171
2015162130161
2115172131161
2216172131151
2316172130150
2417172230140
2518172230140
2619172229140
2720172228140
2821172127130
2923172126130
3024172125130

Wind in April

Winds average 11 km/h in April.

Across April, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

Sunrise & sunset in April

DaylightNight

Daylight runs from about 11 h 48 min at the start of April to 11 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over April. Sunrise moves from 7:09 AM to 7:24 AM, and sunset from 6:55 PM to 6:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.87:096:55
211.77:106:54
311.77:106:53
411.77:116:52
511.77:116:51
611.67:116:49
711.67:126:48
811.67:126:47
911.67:136:46
1011.57:136:45
1111.57:146:44
1211.57:146:43
1311.57:156:42
1411.47:156:41
1511.47:166:40
1611.47:166:39
1711.37:176:38
1811.37:176:37
1911.37:186:36
2011.37:186:35
2111.27:196:34
2211.27:196:33
2311.27:206:32
2411.27:216:31
2511.27:216:30
2611.17:226:29
2711.17:226:28
2811.17:236:27
2911.17:236:27
3011.07:246:26

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.04 kWh/m².

For context, solar energy here swings from a low near 2.65 kWh/m² to a high of 6.79 kWh/m² in January across the year — April's 4.04 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.5Bright
44.5Bright
54.4Bright
64.4Bright
74.4Bright
84.3Bright
94.3Bright
104.3Bright
114.2Bright
124.2Bright
134.1Bright
144.1Bright
154.1Bright
164.0Bright
174.0Moderate
183.9Moderate
193.9Moderate
203.9Moderate
213.8Moderate
223.8Moderate
233.8Moderate
243.7Moderate
253.7Moderate
263.7Moderate
273.7Moderate
283.6Moderate
293.6Moderate
303.6Moderate
Planning a trip in April

Is April a good time to visit General José de San Martín?

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

6.5
Sightseeing
6th-best month of the year
6.7
Beach & pool
5th-best month of the year

April is a reasonable time to visit General José de San Martín for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for General José de San Martín in April

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

In April, General José de San Martín sees daytime highs around 27°C and nights near 18°C. Pack light clothes. Worth having: rain gear. About 10 days see rain.

light clothesrain gear

UV index in General José de San Martín in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in General José de San Martín peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 17 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateVery highExtremeJan 18UV 14Jul 17UV 4
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar12Extreme
Apr8Very high
May6High
Jun5Moderate
Jul4Moderate
Aug5Moderate
Sep8Very high
Oct7Very high
Nov12Extreme
Dec13Extreme

Air quality in General José de San Martín in April

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.

Air quality in General José de San Martín is worst in September — around 22 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (May, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1321 µg/m³May 137 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb10Good
Mar10Good
Apr7Good
May7Good
Jun7Good
Jul10Good
Aug19Moderate
Sep22Moderate
Oct14Moderate
Nov10Good
Dec8Good
Location & terrain

Where is General José de San Martín?

General José de San Martín sits at 26.5°S, 59.3°W, 62 m above sea level, in Argentina. The nearest listed city is Machagai, 83 km away.

Topography around General José de San Martín

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of General José de San Martín.

Within 3 km, the terrain around General José de San Martín has only modest variations in elevation — a maximum elevation change of 13 m around an average of 75 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 27 m; within 80 km, only modest variations in elevation — a maximum elevation change of 54 m.

The land around General José de San Martín is covered by grassland (49%) and trees (28%) within 3 km, grassland (50%) and trees (47%) within 16 km, and trees (53%) and grassland (44%) within 80 km.

3 km
13 m
16 km
27 m
80 km
54 m
treesgrasslandcroplandartificial surfaceswetland
April weather nearby: Machagai 83 km · Pirané 92 km · Quitilipi 94 km · Fontana 103 km · Pilar 109 km · Resistencia 109 km · Tres Isletas 111 km · Barranqueras 112 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 General José de San Martín (-26.5364°, -59.3414°, elevation 62 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).