San Luis weather by month & the best time to visit
🇦🇷 Argentina · city break · humid subtropical climate
The best time to visit San Luis is September — its sunniest month (Sunshine Score 94/100), with April and October close behind. San Luis averages about 3,223 hours of sunshine a year. Daytime highs around 21°C / 70°F and roughly 23 mm of rain in September.
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- Sun hours / year
- 3,223
- Sunniest month
- September
- Peak score
- 94/100
- Rain / year
- 693 mm
- Midday UV at peak
- 12 (extreme)
- Population
- 432k
- Elevation
- 702 m
When is the best time to visit San Luis?
For sunshine, the best time to visit San Luis is September, then April and October. The dullest month is July (56/100, 9 mm of rain). The full month-by-month picture is in the table below.
How sunny is San Luis?
San Luis is one of the sunniest places on Earth: about 3,223 hours of sunshine a year. September (94/100) is noticeably better than July (56). It ranks #5 of 41 destinations in Argentina for annual sunshine, above the national median of 2,741 hours. Rain has a clear season: the wettest stretch, around January, carries about 50% of the annual 693 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 75 | 32° / 90°F | 17° / 63°F | 126 mm | 12 |
| February | 78 | 30° / 86°F | 16° / 61°F | 113 mm | 11 |
| March | 83 | 28° / 82°F | 14° / 57°F | 84 mm | 8 |
| April | 89 | 23° / 73°F | 10° / 50°F | 50 mm | 5 |
| May | 78 | 18° / 64°F | 6° / 43°F | 23 mm | 3 |
| June | 65 | 16° / 61°F | 3° / 37°F | 5 mm | 2 |
| July | 56 | 15° / 59°F | 2° / 36°F | 9 mm | 3 |
| August | 80 | 18° / 64°F | 4° / 39°F | 9 mm | 4 |
| September | 94 | 21° / 70°F | 7° / 45°F | 23 mm | 6 |
| October | 89 | 26° / 79°F | 10° / 50°F | 52 mm | 8 |
| November | 81 | 29° / 84°F | 14° / 57°F | 92 mm | 10 |
| December | 79 | 31° / 88°F | 16° / 61°F | 107 mm | 12 |
See San Luis on the interactive sunshine globe →
Nearby places for sunshine
- Mendoza Argentina · 232 km · best in Sep · 3,504 h sun/yr
- Cordoba Argentina · 297 km · best in Aug · 2,919 h sun/yr
- Santiago Chile · 412 km · best in Mar · 3,263 h sun/yr
- Rosario Argentina · 521 km · best in Sep · 2,737 h sun/yr
- La Serena-Coquimbo Chile · 591 km · best in Jan · 2,601 h sun/yr
- Concepcion Chile · 724 km · best in Jan · 3,020 h sun/yr
Nearest destinations
- San Rafael Argentina · 239 km · 3,468 h sun/yr · best in Sep
- La Rioja Argentina · 435 km · 3,246 h sun/yr · best in Jul
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