San Juan Weather & Climate

Argentina

San Juan sees feels-like daytime highs peak around 37°C in January and nighttime lows bottom out near 3°C in July. February is the wettest month (~23 mm), while June is the driest (~3 mm). For sunshine, March leads with about 86% clear skies.

Best time to visit San Juan

Based on mild feels-like temperatures and low rain chances, the most comfortable months are October, April, and March — expect around 13.727°C with roughly 3% chance of rain on a given day in October.

San Juan climate by month

MonthLow / High °CRain %RainfallClear skiesWind
January23.3° / 37°11%18 mm82%14.5 kph
February22.3° / 35.1°11%23 mm85%13.8 kph
March19.2° / 30.7°8%14 mm86%12.8 kph
April13.8° / 24.6°3%5 mm80%11.5 kph
May8.2° / 19.5°2%4 mm66%10.7 kph
June3.9° / 15.7°2%3 mm63%10.6 kph
July3° / 15.4°2%3 mm70%11.2 kph
August5.7° / 18.3°3%4 mm76%12.2 kph
September9.3° / 22°3%4 mm78%13.5 kph
October13.7° / 27°3%4 mm82%14.5 kph
November18.5° / 32.3°5%7 mm85%15 kph
December21.9° / 35.4°8%12 mm85%15 kph

Feels-like temperatures from long-term historical data; ☀ marks the most comfortable months (mild temperatures, low rain).

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