San Luis, Argentina — Weather in May 2027

Climate Overview

San Luis, Argentina in May has mild conditions, with highs averaging 18.8°C (66°F) and noticeably cooler mornings. Temperatures drop noticeably between day and night.

This month falls at the end of Autumn.

Daily highs in May gradually drop from around 21°C (70°F) at the start to 16°C (61°F) by month's end.

Rainfall is heaviest during the first third of the month, while the last third tends to be drier.

Expect around 9.0h of sunshine at the start of May, decreasing to 7.9h by the end.

The warmest days tend to fall around the 2th, averaging 21.4°C (71°F).

Compared to April, this month is about 4°C cooler with 1 fewer rainy days. Temperatures begin dropping heading into June.

Monthly May Averages

Temperature

19°C / 9°C

Feels Like

17°C / 6°C

Rain

4 days · 24 mm

Sunshine

8.2h / day

Humidity

64% — Moderate

Wind

15 km/h

Wind Direction

NE (47°)

Gusts

31 km/h

Daylight

10.4 h

Cloud Cover

43%

Clear Sky Days

9.1

UV Index

4 — Moderate

Dew Point

7°C — Dry

Moon Phase

Waxing Gibbous · 66%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

High Low

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 08:09

Daylight 10.4h

Sunset 18:34

Compare Months

2days (10 mm) Excellent

2days (7 mm) Excellent

1days (9 mm) Excellent

3days (16 mm) Excellent

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	31°C / 20°C	32°C / 20°C	13days (109 mm) Wet	12.2h Excellent	54% Moderate	9.1 Very High	Good	View Details
February	30°C / 19°C	31°C / 19°C	10days (64 mm) Wet	11.8h Excellent	56% Moderate	8.5 Very High	Good	View Details
March best	27°C / 17°C	28°C / 16°C	8days (52 mm) Wet	10.4h Excellent	58% Moderate	6.8 High	Excellent	View Details
April best	23°C / 13°C	22°C / 11°C	5days (44 mm) Good	8.9h Good	64% Muggy	4.8 Moderate	Excellent	View Details
May	19°C / 9°C	17°C / 6°C	4days (24 mm) Good	8.2h Good	64% Muggy	4 Moderate	Good	View Details
June	16°C / 6°C	13°C / 2°C	2days (10 mm) Excellent	8.2h Good	59% Moderate	3.4 Moderate	Fair	View Details
July	17°C / 5°C	13°C / 2°C	2days (7 mm) Excellent	8.3h Good	57% Moderate	3.6 Moderate	Fair	View Details
August	20°C / 7°C	16°C / 4°C	1days (9 mm) Excellent	9.5h Good	43% Moderate	4.6 Moderate	Good	View Details
September	23°C / 10°C	20°C / 7°C	3days (16 mm) Excellent	10.3h Excellent	42% Moderate	6.4 High	Excellent	View Details
October best	25°C / 13°C	24°C / 10°C	7days (45 mm) Good	10.8h Excellent	45% Moderate	7.4 Very High	Excellent	View Details
November best	28°C / 17°C	28°C / 14°C	10days (68 mm) Wet	12.1h Excellent	47% Moderate	8.3 Very High	Excellent	View Details
December best	31°C / 19°C	31°C / 17°C	10days (64 mm) Wet	12.5h Excellent	45% Moderate	8.9 Very High	Excellent	View Details

What to Wear

Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.

Packing List

Warm evening layerComfortable walking shoes

Frequently Asked Questions

Expand all

Is May a good time to visit San Luis?

May is typically good for visiting San Luis, with average highs of 19°C (66°F) and around 4 rainy days. San Luis, Argentina in May has mild conditions, with highs averaging 18.8°C (66°F) and noticeably cooler mornings. Tempe

Does it rain a lot in San Luis in May?

San Luis typically sees around 4 rainy days in May with 24 mm (0.9 in) of total rainfall. An umbrella should suffice.

Does it get cold at night in San Luis in May?

Nights in San Luis during May are cool at around 9°C (48°F). Bring a jacket or sweater for evenings.

What should I pack for San Luis in May?

With highs of 19°C (66°F) and lows of 9°C (48°F) in May, we recommend: Warm evening layer, Comfortable walking shoes. Comfortable walking shoes are essential.

Is May among the best months weather-wise in San Luis?

May is not the most favourable month weather-wise in San Luis. Consider visiting during months with milder temperatures or less rainfall for a better experience.

What is the UV index in San Luis in May?

The average UV index in San Luis during May is 4 (moderate). Sunscreen and sunglasses are recommended during midday hours.

How many hours of daylight are there in San Luis in May?

San Luis gets approximately 10 hours of daylight per day in May, with around 8 hours of sunshine.

Does it snow in San Luis in May?

Snow is uncommon in San Luis during May based on 10-year climate averages.

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