San Juan Province Weather in May

Average temperatures, rainfall, sunshine and the best places to visit in San Juan Province, Argentina in May.

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San Juan Barreal San Agustín de Valle Fértil

Are you planning a trip a to San Juan Province, Argentina in May and wondering what kind of weather to expect? This page has all the details you need.

What to Expect in San Juan Province in May

San Juan Province, Argentina is a region in Argentina. May in San Juan Province generally has temperatures that range from mild to pleasant, with low precipitation.

Temperatures

During the day temperatures vary from mild in Barreal at 15°C (59°F) to pleasant in San Juan at 21°C (70°F). At night it cools down to 7°C (45°F) in San Juan and 0°C (32°F) in Barreal.

To explore the conditions in San Juan Province, Argentina in more detail, check the map below.

Precipitation

In May, precipitation varies across different areas. From low rainfall in San Juan with an average of 16 mm (0.6 in) to low rainfall in San Agustín de Valle Fértil with 26 mm (1 in).

Average sunshine

Several destinations enjoy plenty of sunshine this month. San Juan sees close to 230 hours of sunlight, making it great for sun lovers.

Explore San Juan Province by month

Pick a month to see the average temperature, rainfall and sunshine in San Juan Province - and find the best time to visit. (based on San Juan)

January33°C (91°F) February32°C (90°F) March29°C (84°F) April25°C (77°F) May21°C (70°F) June18°C (64°F) This monthJuly18°C (64°F) August21°C (70°F) September23°C (73°F) October27°C (81°F) November30°C (86°F) December32°C (90°F)
Best Time to Visit San Juan Province →

Best Places to Visit in San Juan Province in May

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across San Juan Province.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in San Juan Province

What is the weather like in May for some of the most popular destinations in San Juan Province, Argentina?

Temperature range in San Juan Province (May)

Precipitation variation in San Juan Province (May)

San Juan

In May San Juan generally has pleasant temperatures with maximum daytime temperatures around 21°C (70°F), minimum nighttime temperatures around 7°C (45°F) and low monthly rainfall. So on average the conditions are excellent that month.

« April
May
June »
April
May
June
Max temperature
25°C (77°F)
21°C (70°F)
18°C (64°F)
Min temperature
11°C (52°F)
7°C (45°F)
3°C (37°F)
Monthly sun hours
275 hours
230 hours
208 hours
Monthly rainfall
29 mm (1.1 in)
16 mm (0.6 in)
12 mm (0.5 in)
Monthly rainy days
2 days
a single day
a single day
Weather conditions
excellent
excellent
excellent
Climate in San Juan →

Barreal

In May Barreal generally has moderate temperatures with maximum daytime temperatures around 15°C (59°F), minimum nighttime temperatures around 0°C (32°F) and low monthly snow/rainfall. So on average the conditions are very good that month.

« April
May
June »
April
May
June
Max temperature
20°C (68°F)
15°C (59°F)
11°C (52°F)
Min temperature
4°C (39°F)
0°C (32°F)
-3°C (27°F)
Monthly snow/rainfall
25 mm (1 in)
23 mm (0.9 in)
26 mm (1 in)
Monthly rainy days
4 days
2 days
2 days
Weather conditions
excellent
very good
good
Climate in Barreal →

San Agustín de Valle Fértil

In May San Agustín de Valle Fértil generally has pleasant temperatures with maximum daytime temperatures around 18°C (64°F), minimum nighttime temperatures around 7°C (45°F) and low monthly rainfall. So on average the conditions are excellent that month.

« April
May
June »
April
May
June
Max temperature
22°C (72°F)
18°C (64°F)
16°C (61°F)
Min temperature
12°C (54°F)
7°C (45°F)
4°C (39°F)
Monthly rainfall
48 mm (1.9 in)
26 mm (1 in)
11 mm (0.4 in)
Monthly rainy days
3 days
a single day
a single day
Weather conditions
excellent
excellent
very good
Climate in San Agustín de Valle Fértil →

Is your destination not in the list? Have a look at all destinations in San Juan Province, in Argentina.

In our records: Argentina May extremes

Notable May records observed across cities in Argentina in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • From our sources, the wettest May day in Argentina brought 318 mm (13 in) in Salta on May 18, 1981.

Popular cities in May

Day & night temperatures, rainfall and average weather in San Juan Province in May.

City Weather Day temp Night temp Rainfall
San Juan 21°C (70°F) 7°C (45°F) 16 mm (0.6 in)
Barreal 15°C (59°F) 0°C (32°F) 23 mm (0.9 in)
San Agustín de Valle Fértil 18°C (64°F) 7°C (45°F) 26 mm (1 in)

San Juan Province weather in May: frequently asked questions

What is the weather like in San Juan Province, Argentina in May?

San Juan Province, Argentina typically experiences excellent weather in May, part of the season. Daytime highs in San Juan average around 21°C (70°F), and temperatures drop to about 7°C (45°F) at night.

What is the average temperature in San Juan Province, Argentina in May?

San Juan averages a daytime maximum of 21°C (70°F) in May, with overnight lows close to 7°C (45°F).

Does San Juan Province, Argentina get a lot of rain in May?

Not particularly. San Juan averages just 16 mm (0.6 in) of rain in May, making it a mostly dry month for San Juan Province, Argentina.

Is May a Good Time to Visit San Juan Province, Argentina?

We believe that May is one of the best times to visit San Juan Province, Argentina with overall excellent weather in San Juan. It's worth noting that weather conditions might differ depending on the location you visit.

On average, the best time to visit San Juan Province, Argentina is in March, April, May, June, July, August, September and October with generally excellent weather in San Juan. The weather in January, on the other hand, tends to be mixed.

Interested in more climate information?

We have much more information about the climate in San Juan Province.

Weather and climate has detailed information for every country in the world. Are you going to Argentina? Get detailed historical weather averages for many cities in Argentina.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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