San José Weather in September

San José in September sees moderate temperatures, with highs around 14°C (57°F) and overnight lows of 1°C (34°F). Rainfall is fairly high at around 87 mm (3.4 in) on average, so pack waterproofs just in case.

Rainfall in San José in September

Typically around 4 days of rainfall are expected, averaging 87 mm (3.4 in) for the month. Rainfall tends to arrive in short, intense showers this month. Rain days are few, but the showers can be surprisingly heavy.

Temperature in San José in September

San José in September gets highs of 14°C (57°F) during the day and drops to 1°C (34°F) at night. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With overnight lows of 1°C (34°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in San José in September

The city usually sees around 221 hours of sunlight, indicating many sunny days despite the cool temperatures, making it a good month for sightseeing.

Should you favor a climate that's both dry and comfortably warm, January, February, March, November and December typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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For a detailed overview over the year and the best time to visit Argentina, check out our San José's climate page.

San José Temperature in September

Min Temperature 1°C (34°F)  

Max Temperature 14°C (57°F)  

Chance of Rain 14%  

Precipitation 87 mm (3.4 in)  

Rainy days 4 days  

Humidity 50% *  

Sunshine 221 hours *  

Percentage Sunshine 63% *  

* Data from: Mendoza, Argentina (63 KM, 39 Miles).

What to Wear in San José in September

The weather can be unpredictable in September, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in San José in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

4/10

Cycling

6/10

Walking

6/10

Camping

4/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Argentina, check out our San José's climate page.

More climate data for San José

Temperature Rainfall Sunshine Humidity

See the full San José climate overview or explore weather in Argentina.