Weatheo

San Justo Weather by Month

Average temperatures, rainfall and humidity for San Justo, Argentina, month by month, built from OpenWeather’s historical records. Use it to see what a typical San Justo month looks like before you travel — then check the live San Justo forecast for the days ahead.

Warmest month

January

30°C average high

Coolest month

July

8°C average low

Wettest month

October

51 mm of rain

Driest month

June

23 mm of rain

Average temperature and rainfall in San Justo by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

MonthAvg highAvg lowRecord low / highRainfallHumidityWind
January30°C20°C9°C / 41°C
38 mm
64%14 km/h
February29°C19°C8°C / 39°C
30 mm
68%13 km/h
March26°C17°C1°C / 38°C
36 mm
71%13 km/h
April23°C14°C3°C / 32°C
50 mm
76%14 km/h
May18°C10°C1°C / 27°C
42 mm
79%12 km/h
June16°C8°C-4°C / 26°C
23 mm
77%12 km/h
July15°C8°C-2°C / 27°C
29 mm
78%11 km/h
August17°C9°C-3°C / 29°C
25 mm
72%14 km/h
September19°C11°C0°C / 31°C
34 mm
71%13 km/h
October22°C13°C3°C / 35°C
51 mm
70%13 km/h
November26°C16°C7°C / 36°C
50 mm
65%14 km/h
December29°C18°C8°C / 39°C
32 mm
63%13 km/h

Best time to visit San Justo

The most comfortable time to visit San Justo is generally March to April and November, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rainfall is spread evenly across the months, totalling about 440 mm a year.

Travellers who prefer heat should aim for January, when highs average 30°C. October is the month to avoid if rain would spoil your plans — it averages 51 mm, roughly 2× the rainfall of the driest month (June).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the San Justo forecast for what is happening now.

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