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:
21°C
69.8°F
°C °F

Condition: Clear Sky

Pressure: 933 hPa

Feel like: 22 °C

Temperature: 21°C

Cloud: 0%

Humidity: 56%

Wind: SE - 3 km/h

Visibility: 24.14 km

Weather forecast

Sun
19 Apr
12°C / 24°C
Overcast
Mon
20 Apr
11°C / 17°C
Overcast
Tue
21 Apr
11°C / 18°C
Overcast
Wed
22 Apr
12°C / 21°C
Partly Cloudy
Thu
23 Apr
12°C / 24°C
Mainly Clear
Hourly forecast today:
13:00 PM
12° / 21°
12° / 21°
Clear Sky
56% 7 km/h
14:00 PM
12° / 23°
12° / 23°
Clear Sky
52% 14 km/h
15:00 PM
13° / 24°
13° / 24°
Clear Sky
50% 17 km/h
16:00 PM
14° / 26°
14° / 26°
Clear Sky
48% 18 km/h
17:00 PM
14° / 27°
14° / 27°
Mainly Clear
46% 19 km/h
18:00 PM
14° / 28°
14° / 28°
Mainly Clear
43% 21 km/h
19:00 PM
15° / 28°
15° / 28°
Mainly Clear
44% 25 km/h
20:00 PM
14° / 28°
14° / 28°
Clear Sky
44% 28 km/h
21:00 PM
14° / 27°
14° / 27°
Clear Sky
44% 29 km/h
22:00 PM
14° / 26°
14° / 26°
Clear Sky
46% 30 km/h
23:00 PM
14° / 25°
14° / 25°
Clear Sky
49% 29 km/h

30 Day Averages and Extremes

  • Average high 23.5°C
  • Average low 14.73°C
  • Hottest day 30°C (12 April 2026)
  • Coldest day 9°C (02 May 2026)
  • Average humidity 54.0%
  • Days with precipitation 5 days
  • Highest precipitation 16 mm (04 April 2026)

Yesterday's Data

  • Max: 27°C
  • Min: 18°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 very hot weather in San Juan, with the high temperatures above 28ºC (82.4ºF), consider wearing:
- Breathable shorts or skirts
- Open-toed sandals or light sneakers
- Loose and airy fabrics like linen or cotton
- Sunscreen for skin protection

Temperature

Early
12°C / 23°C
Morning
12°C / 19°C
Afternoon
13°C / 24°C
Evening
14°C / 27°C

Air quality

Good

Satisfactory air quality, minimal pollution, low risk

  • CO2 451
  • CO 310
  • NH3 0
  • NO2 5
  • O3 45
  • PM10 4
  • PM25 2
  • SO2 1
  • CH4 1,377

Sunrise / Sunset

10:56
22:09