San Juan, Argentina Weather

  1. San Juan, Argentina Weather
  2. Current conditions
  3. Weather forecast
  4. Averages and extremes
  5. Yesterday's Data
  6. Temperature and possibility of rain in San Juan over the next 12 hours
  7. Temperature and possibility of rain in San Juan in the coming days
  8. Rainfall in San Juan in the coming days
  9. San Juan Weather Summary
  10. Weather averages by month
  11. San Juan's weather
  12. Frequently asked questions
  13. Comments
San Juan, Weather
(Photo by Sasha • Stories on Unsplash)

Current conditions

Updated:
17°C
62.6°F
°C °F

Condition: Partly Cloudy

Pressure: 939 hPa

Feel like: 14 °C

Temperature: 17°C

Cloud: 51%

Humidity: 40%

Wind: SE - 7 km/h

Visibility: 52.76 km

Weather forecast

Tue
04 Aug
8°C / 21°C
Partly Cloudy
Wed
05 Aug
8°C / 22°C
Partly Cloudy
Thu
06 Aug
9°C / 17°C
Overcast
Fri
07 Aug
3°C / 21°C
Mainly Clear
Sat
08 Aug
5°C / 13°C
Mainly Clear
Hourly forecast today:
22:00 PM
3° / 17°
3° / 17°
Partly Cloudy
40% 21 km/h
23:00 PM
4° / 15°
4° / 15°
Mainly Clear
46% 12 km/h
00:00 AM
4° / 14°
4° / 14°
Mainly Clear
50% 4 km/h
01:00 AM
4° / 12°
4° / 12°
Clear Sky
55% 5 km/h
02:00 AM
4° / 11°
4° / 11°
Mainly Clear
60% 8 km/h
03:00 AM
3° / 10°
3° / 10°
Mainly Clear
63% 8 km/h
04:00 AM
3° / 10°
3° / 10°
Mainly Clear
63% 7 km/h
05:00 AM
3° / 10°
3° / 10°
Clear Sky
63% 3 km/h
06:00 AM
3° / 9°
3° / 9°
Clear Sky
66% 3 km/h
07:00 AM
3° / 9°
3° / 9°
Mainly Clear
66% 6 km/h
08:00 AM
3° / 8°
3° / 8°
Clear Sky
68% 5 km/h

30 Day Averages and Extremes

  • Average high 17.7°C
  • Average low 6.3°C
  • Hottest day 27°C (27 July 2026)
  • Coldest day 1°C (10 August 2026)
  • Average humidity 55.9%
  • Days with precipitation 6 days
  • Highest precipitation 34 mm (20 July 2026)

Yesterday's Data

  • Max: 22°C
  • Min: 12°C
  • Total Precipitation: 0 mm

Temperature and possibility of rain in San Juan over the next 12 hours

Temperature and possibility of rain in San Juan in the coming days

Rainfall in San Juan in the coming days

San Juan Climate Summary

San Juan features a Mid-latitude desert (Köppen classification: BWk), with an average annual temperature of 18.77ºC (65.79ºF), which is about 0.53% higher than the national average for Argentina. Annually, the city experiences approximately 8.02 millimeters (0.32 inches) of rainfall, spread across 24.17 rainy days, accounting for 6.62% of the year.

Longitude -31.5287127
Latitude -68.5360403
Yearly high temperature 23.31ºC (73.96ºF)
Yearly low temperature 12.48ºC (54.46ºF)
Hottest month January 30.65ºC (87.17ºF)
Coldest month July 4.77ºC (40.59ºF)
Yearly precip 8.02mm (0.32in)
Days with rainfall 24.17 days (6.62%)
Driest month August (36.33%)
Wettest month January (39.06%)

Weather averages by month

Month High / Low (°C) Rain
January 30.65° / 19.74° 6.18 days
February 29.16° / 18.79° 4.36 days
March 26.64° / 16.17° 2.64 days
April 22.75° / 12.58° 1.0 days
May 18.88° / 9.26° 0.36 days
June 16.02° / 6.16° 0.27 days
July 14.71° / 4.77° 0.36 days
August 18.29° / 7.28° 0.18 days
September 21.12° / 9.44° 0.45 days
October 23.97° / 11.97° 0.82 days
November 27.5° / 15.48° 2.82 days
December 30.02° / 18.11° 4.73 days

San Juan's weather

Frequently asked questions

1. What is the hottest month in San Juan?

January has the highest average monthly temperature (daily mean of 30.65ºC) and July are the coolest (daily mean of 4.77ºC).

2. What should I wear in San Juan today?

For today's warm weather in San Juan, with temperatures between 17ºC to 20ºC (62.6ºF to 68.0ºF), you might consider wearing:
- T-shirt or short-sleeve blouse
- Shorts or lightweight trousers
- Cotton or linen fabrics
- Sunscreen (if spending time outdoors)

Temperature

Early
3°C / 13°C
Morning
2°C / 9°C
Afternoon
3°C / 16°C
Evening
3°C / 19°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 445
  • CO 199
  • NH3 0
  • NO2 4
  • O3 54
  • PM10 77
  • PM25 13
  • SO2 1
  • CH4 1,342

Sunrise / Sunset

11:20
22:00