AI-generatedSan Juan, Argentina at a glance
- Best time
- Apr – Oct
- Warmest month
- Jan · 35°
- Sunshine a year
- 3,160 h
- Rain a year
- 175 mm
- Climate
- Hot desert
- Time zone
- UTC−3
- Elevation
- 646 m
Climate in San Juan, Argentina
San Juan, Argentina has a hot desert climate with sunshine almost every day and hardly any rain. January is the warmest month with average highs of 35 °C, while July is the coolest at 17 °C. With around 3,160 hours of sunshine a year, San Juan, Argentina is very sunny; November is the sunniest month with 10.5 hours a day.
Holiday weather through the year
Best time to visit San Juan, Argentina
The best time to visit San Juan, Argentina is from April to October. For sightseeing, day trips and hiking, conditions are most comfortable from April to October. From December to February it can get very hot, with highs of up to 35 °C. The wettest month is March with 23 mm of precipitation.
San Juan, Argentina through the seasons
How the weather changes over the seasons, with averages for each.
San Juan, Argentina in spring
Sep – Nov
Excellent
- 24–32 °C by day
- 9.4 h of sun a day
- 9 rainy days in all
San Juan, Argentina in summer
Dec – Feb
Fair
- 33–35 °C by day
- 10.0 h of sun a day
- 9 rainy days in all
San Juan, Argentina in autumn
Mar – May
Excellent
- 20–30 °C by day
- 7.8 h of sun a day
- 10 rainy days in all
San Juan, Argentina in winter
Jun – Aug
Excellent
- 17–20 °C by day
- 7.3 h of sun a day
- 6 rainy days in all
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Apr – Oct
15–28 °C and not too much rain
Peak heat
Dec – Feb
Highs of 33 °C or more
Find your perfect month
Tell us what you like and we rate every month in San Juan, Argentina for you.
Your best months: April, September
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Excellent
Best time to visit: April – October
Good forSightseeing & walks
A typical day in October
- Morning, 08:00: about 15°
- Midday, 13:00: about 26°
- Afternoon, 16:00: about 28°
- Evening, 20:00: about 21°
- Night, 23:00: about 17°
06:5519:44
Pleasant evenings; a light layer can help.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 06:40–07:28 · evening 19:12–19:59
- Blue hour
- Morning 06:31–06:40 · evening 19:59–20:09
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
October in San Juan, Argentina compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs rise from about 26° at the start of the month to 30° at the end. The days get 0.9 h longer.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 26° | 30° |
| Night-time low | 9° | 13° |
| Daylight | 12.4 h | 13.3 h |
What is the weather like in San Juan, Argentina in October?
In October, San Juan, Argentina is hot: daytime highs average 28 °C, and nights cool down to about 11 °C. With around 9.4 hours of sunshine a day, there is plenty of sun. Rain is rare: about 4 days bring 21 mm in total. On about 10 days the thermometer climbs to 30 °C or more. All in all, October is an excellent month for a holiday in San Juan, Argentina.
More details for October
- Daylight
- 12 h 49 min06:55 – 19:44
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 17 km/haverage daily peakAll months
- Cloud cover
- 28 %on averageAll months
- Hot days
- 10 days30 °C or moreAll months
- Time zone
- UTC−3offset from UTC
How the score comes together
- Temperatureweight 50 %90 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 30 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- A jumper for the evenings
Compare two months in San Juan, Argentina
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
October and September bring similar holiday weather to San Juan, Argentina (score 95 and 98). In September, days are 4 °C cooler than in October. September has one rainy day fewer. The sun shines an hour less a day in September.
| Month | October | September |
|---|---|---|
| Holiday weather score | 95 | 98 |
| Daytime high | 28° | 24° |
| Night-time low | 11° | 7° |
| Sunshine | 9.4 hbetter | 8.4 h |
| Rainy days | 4 | 3better |
| Rainfall | 21 mm | 14 mm |
Based on the climate averages 1996–2025.
San Juan, Argentina month by month
The typical weather for every month at a glance.
50January35° · 10.1 h
In January, San Juan, Argentina is very hot: daytime highs average 35 °C, and even at night it stays warm at around 20 °C. With around 10.1 hours of sunshine a day, there is plenty of sun. Rain is rare: about 3 days bring 15 mm in total. On about 28 days the thermometer climbs to 30 °C or more. All in all, January is a so-so month for a holiday in San Juan, Argentina.
San Juan, Argentina in January61February33° · 9.7 h
In February, San Juan, Argentina is very hot: daytime highs average 33 °C, and nights cool down to about 18 °C. With around 9.7 hours of sunshine a day, there is plenty of sun. Rain is rare: about 3 days bring 17 mm in total. On about 22 days the thermometer climbs to 30 °C or more. All in all, February is a good month for a holiday in San Juan, Argentina.
San Juan, Argentina in February78March30° · 8.8 h
In March, San Juan, Argentina is hot: daytime highs average 30 °C, and nights cool down to about 16 °C. The sun shines for around 8.8 hours a day. Rain is rare: about 4 days bring 23 mm in total. On about 18 days the thermometer climbs to 30 °C or more. All in all, March is a good month for a holiday in San Juan, Argentina.
San Juan, Argentina in March96April25° · 7.8 h
In April, San Juan, Argentina is warm: daytime highs average 25 °C, and nights cool down to about 11 °C. The sun shines for around 7.8 hours a day. Rain is rare: about 3 days bring 17 mm in total. All in all, April is an excellent month for a holiday in San Juan, Argentina.
San Juan, Argentina in April93May20° · 6.9 h
In May, San Juan, Argentina is mild: daytime highs average 20 °C, and nights cool down to about 6 °C. The sun shines for around 6.9 hours a day. Rain is rare: about 3 days bring 10 mm in total. All in all, May is an excellent month for a holiday in San Juan, Argentina.
San Juan, Argentina in May88June17° · 6.7 h
In June, San Juan, Argentina is mild: daytime highs average 17 °C, and nights cool down to about 1 °C. The sun shines for around 6.7 hours a day. It hardly ever rains. All in all, June is an excellent month for a holiday in San Juan, Argentina.
San Juan, Argentina in June87July17° · 7.3 h
In July, San Juan, Argentina is mild: daytime highs average 17 °C, and nights cool down to about 0 °C. The sun shines for around 7.3 hours a day. It hardly ever rains. All in all, July is an excellent month for a holiday in San Juan, Argentina.
San Juan, Argentina in July97August20° · 8.0 h
In August, San Juan, Argentina is mild: daytime highs average 20 °C, and nights cool down to about 3 °C. The sun shines for around 8.0 hours a day. Rain is rare: about 2 days bring 11 mm in total. All in all, August is an excellent month for a holiday in San Juan, Argentina.
San Juan, Argentina in August98September24° · 8.4 h
In September, San Juan, Argentina is warm: daytime highs average 24 °C, and nights cool down to about 7 °C. The sun shines for around 8.4 hours a day. Rain is rare: about 3 days bring 14 mm in total. All in all, September is an excellent month for a holiday in San Juan, Argentina.
San Juan, Argentina in September95October28° · 9.4 h
In October, San Juan, Argentina is hot: daytime highs average 28 °C, and nights cool down to about 11 °C. With around 9.4 hours of sunshine a day, there is plenty of sun. Rain is rare: about 4 days bring 21 mm in total. On about 10 days the thermometer climbs to 30 °C or more. All in all, October is an excellent month for a holiday in San Juan, Argentina.
San Juan, Argentina in October72November32° · 10.5 h
In November, San Juan, Argentina is hot: daytime highs average 32 °C, and nights cool down to about 15 °C. With around 10.5 hours of sunshine a day, there is plenty of sun. Rain is rare: about 3 days bring 12 mm in total. On about 19 days the thermometer climbs to 30 °C or more. All in all, November is a good month for a holiday in San Juan, Argentina.
San Juan, Argentina in November54December34° · 10.3 h
In December, San Juan, Argentina is very hot: daytime highs average 34 °C, and nights cool down to about 18 °C. With around 10.3 hours of sunshine a day, there is plenty of sun. Rain is rare: about 3 days bring 21 mm in total. On about 26 days the thermometer climbs to 30 °C or more. All in all, December is a so-so month for a holiday in San Juan, Argentina.
San Juan, Argentina in DecemberClimate in detail
Year & climate table
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in San Juan, Argentina
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
- Warm 20–24°
CoolOctober: nights around 11°. A duvet at night and a jumper for the evening.
The coolest nights are in July (0°), the warmest in January (20°). Tropical nights of 20 °C and more are the rule in January; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) from February to March and from November to December. Nights fall below 8 °C on average from May to September, so the room should be heated.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|
| JanuaryJan | 50 | 35° | 20° | 10.1 h | 3 | 15 |
| FebruaryFeb | 61 | 33° | 18° | 9.7 h | 3 | 17 |
| MarchMar | 78 | 30° | 16° | 8.8 h | 4 | 23 |
| AprilApr | 96 | 25° | 11° | 7.8 h | 3 | 17 |
| MayMay | 93 | 20° | 6° | 6.9 h | 3 | 10 |
| JuneJun | 88 | 17° | 1° | 6.7 h | 2 | 7 |
| JulyJul | 87 | 17° | 0° | 7.3 h | 2 | 6 |
| AugustAug | 97 | 20° | 3° | 8.0 h | 2 | 11 |
| SeptemberSep | 98 | 24° | 7° | 8.4 h | 3 | 14 |
| OctoberOct | 95 | 28° | 11° | 9.4 h | 4 | 21 |
| NovemberNov | 72 | 32° | 15° | 10.5 h | 3 | 12 |
| DecemberDec | 54 | 34° | 18° | 10.3 h | 3 | 21 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
31.54° S, 68.53° W · 646 m · America/Argentina/San_Juan
Sunshine
Sunshine hours in San Juan, Argentina
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 9.4 of 12.8 hours of daylight in San Juan, Argentina, 73 % of the daylight hours.
Sunshine hours: measured at the weather station 11 km away, averages 1991–2020 (WMO climate normals). Daylight is the time from sunrise to sunset on the 15th of the month.
Rain
Rain in San Juan, Argentina: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, San Juan, Argentina has about 4 rainy days with 21 mm of rain in total.
UV index
UV index in San Juan, Argentina
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 10 · very highStay in the shade around midday; SPF 50, clothing, hat and sunglasses.
The sun is strongest in December (UV 12).
Minutes until sunburn in October
- Very fair skin
- about 15 min
- Fair skin
- about 15 min
- Light brown skin
- about 25 min
- Olive skin
- about 30 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Wind & clouds
Wind and clouds in San Juan, Argentina
How breezy and how cloudy San Juan, Argentina is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in San Juan, Argentina typically peaks at 17 km/h during the day: Beaufort 3, gentle breeze.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 28 % of the sky over San Juan, Argentina: mostly sunny, with about 9.4 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat & humidity
Heat and humidity in San Juan, Argentina
How often the day gets hot in San Juan, Argentina (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, San Juan, Argentina has about 10 hot days, with an average daytime high of 28 °C: some hot or muggy days. Single hot or muggy days are possible; a hat and water bottle are enough.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Planning a trip to San Juan, Argentina
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
San Juan, Argentina in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
San Juan, Argentina has its best school-holiday weather during October half-term (score 95) and its weakest during the Christmas holidays (score 52).
- 91
Easter holidays
Mar – Apr
Excellent
- 27 °C by day
- 8.1 h of sun a day
- 3 rainy days a month
- 92
May half-term
May – Jun
Excellent
- 20 °C by day
- 6.9 h of sun a day
- 3 rainy days a month
Good for: Sightseeing & walks
- 94
Summer holidays
Jul – Aug
Excellent
- 19 °C by day
- 7.8 h of sun a day
- 2 rainy days a month
Good for: Sightseeing & walks
- 95
October half-term
Oct
ExcellentBest holidays
- 28 °C by day
- 9.4 h of sun a day
- 4 rainy days a month
Good for: Sightseeing & walks
- 52
Christmas holidays
Dec – Jan
Fair
- 35 °C by day
- 10.2 h of sun a day
- 3 rainy days a month
Keep in mind: Peak heat
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 14 h 10 min
- Distance
- 11,360 km
- Time zone
- UTC−3
- Jet lag
- About 3 days (4 h west)
Rule of thumb for flying west: for a few days before, stay up a little later, and get afternoon and evening light at your destination.
Most routes need a change of planes, which adds time.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Good to know: Argentina
- Currency
- Argentine Peso (ARS)
- Language
- Spanish
- Sockets
- Type C, I · 220 V
- Dialling code
- +54
- Emergency number
- 911
UK plugs need a travel adapter
Sources: GeoNames (CC BY 4.0) and Wikidata (CC0). Please check details before you travel.
Compare & alternatives
Compare with another place
San Juan, Argentina compared
Put San Juan, Argentina side by side with another destination.
San Juan vs Mendoza
In October San Juan has the better holiday weather (score 95 vs 89). During the day Mendoza is 4 °C cooler than San Juan.
| in October | San Juan | Mendoza |
|---|---|---|
| Holiday weather score | 95 | 89 |
| Daytime high | 28° | 24° |
| Sunshine | 9 h | 9 h |
| Rainy days | 4 | 9 |
| Best time | Apr – Oct | Apr – Oct |
Through the year
Best places in the country
Argentina in October: the best places
In October, San Juan ranks 4 among the 31 nearest destinations in this country.
- Neuquén23°97
- 2Trelew22°97
- 3Comodoro Rivadavia19°9°96
- 4San JuanThis page28°95
- 5Puerto San Julián17°7°92
- 6Mendoza24°89
- 7Bahía Blanca23°88
- 8Córdoba27°87
Places nearby
Near San Juan, Argentina
Other destinations close by.
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Destinations whose weather through the year is closest to San Juan, Argentina's – good alternatives.
Frequently asked questions about San Juan, Argentina
When is the best time to visit San Juan, Argentina?
The best time to visit San Juan, Argentina is from April to October. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
What is the warmest month in San Juan, Argentina?
January is the warmest month, with average highs of 35 °C and nights around 20 °C. July is the coolest month at 17 °C.
When does it rain most in San Juan, Argentina?
The wettest month is March with 23 mm of precipitation. The driest month is July with 6 mm.
How many hours of sunshine does San Juan, Argentina get?
San Juan, Argentina gets around 3,160 hours of sunshine a year. The sunniest month is November with 10.5 hours a day; in June there are 6.7 hours a day.
What time zone is San Juan, Argentina in?
San Juan, Argentina is on UTC−3 all year.
How long is the flight from London to San Juan, Argentina?
A nonstop flight from London to San Juan, Argentina takes about 14 h 10 min, for a straight-line distance of about 11,360 km. Most routes need a change of planes, which adds time.
Which school holidays are best for San Juan, Argentina?
San Juan, Argentina has its best school-holiday weather during October half-term (score 95) and its weakest during the Christmas holidays (score 52). Holiday ratings (0–100): Easter holidays 91, May half-term 92, summer holidays 94, October half-term 95, Christmas holidays 52.