Last updated: May 6, 2024
Under the Köppen–Geiger climate classification San Juan features a cold semi-arid climate (BSk).Temperatures typically range between 12 °C (55 °F) and 22 °C (72 °F) through the year, but rarely can drop to -7 °C (19 °F) or can rise to as high as 35 °C (95 °F).The average annual precipitation amounts to about 506 mm (19.9 inches) and receives 65 rainy days on the 1 mm (0.04 inches) threshold annually.San Juan enjoys an average of 3650 hours of sunshine throughout the year, and daylight varies from 10 hours 44 minutes to 13 hours 30 minutes per day.
The warmest months in San Juan are May, June and August, with daily mean temperatures ranging from 20 to 22 °C (69 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 12 to 15 °C (55 - 59 °F) throughout the day. On average each year, San Juan experiences 170 days above 25 °C (77.0 °F) and 2 days below 0 °C (32.0 °F).
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Maximum | 27°C (80°F) | 31°C (88°F) | 33°C (92°F) | 33°C (91°F) | 35°C (95°F) | 35°C (94°F) | 31°C (89°F) | 31°C (87°F) | 28°C (84°F) | 28°C (83°F) | 28°C (83°F) | 27°C (81°F) |
Mean maximum | 25°C (77°F) | 28°C (83°F) | 30°C (86°F) | 31°C (87°F) | 33°C (91°F) | 32°C (89°F) | 29°C (85°F) | 29°C (85°F) | 27°C (82°F) | 28°C (82°F) | 27°C (80°F) | 25°C (78°F) |
Average high | 20°C (69°F) | 23°C (73°F) | 26°C (79°F) | 28°C (82°F) | 29°C (85°F) | 28°C (82°F) | 26°C (79°F) | 26°C (79°F) | 24°C (75°F) | 24°C (76°F) | 23°C (74°F) | 21°C (70°F) |
Daily mean | 12°C (55°F) | 15°C (59°F) | 18°C (65°F) | 20°C (68°F) | 22°C (72°F) | 21°C (71°F) | 20°C (68°F) | 20°C (69°F) | 18°C (65°F) | 17°C (64°F) | 15°C (59°F) | 13°C (55°F) |
Average low | 6°C (42°F) | 8°C (46°F) | 10°C (50°F) | 12°C (53°F) | 14°C (57°F) | 15°C (59°F) | 14°C (58°F) | 14°C (58°F) | 14°C (57°F) | 12°C (53°F) | 8°C (47°F) | 6°C (43°F) |
Mean minimum | 0°C (33°F) | 3°C (37°F) | 6°C (43°F) | 7°C (45°F) | 10°C (50°F) | 13°C (56°F) | 12°C (54°F) | 13°C (55°F) | 11°C (52°F) | 7°C (45°F) | 2°C (36°F) | -1°C (30°F) |
Minimum | -2°C (29°F) | 1°C (34°F) | 4°C (39°F) | 5°C (41°F) | 9°C (48°F) | 10°C (51°F) | 12°C (53°F) | 11°C (52°F) | 9°C (49°F) | 5°C (41°F) | -2°C (28°F) | -7°C (19°F) |
Compare temperature, precipitation, sunshine, UV index in San Juan, Zacatecas, Mexico with other places around the world.
San Juan usually has the most precipitation in June, July and September, with an average of 13 rainy days and 105 mm (4.1 inches) of precipitation per month.The driest months in San Juan are February, March and April. On average, 7 mm (0.3 inches) of precipitation falls during these months.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Average precipitation mm (inches) | 17 (0.7) | 9 (0.3) | 5 (0.2) | 7 (0.3) | 19 (0.8) | 77 (3.0) | 120 (4.7) | 65 (2.6) | 119 (4.7) | 42 (1.7) | 15 (0.6) | 12 (0.5) |
Average precipitation days (≥ 1 mm) | 2 | 1 | 1 | 2 | 4 | 11 | 13 | 7 | 15 | 6 | 2 | 1 |
The sunniest months in San Juan are May, June and July, when the sun shines an average of 11 hours 9 minutes a day.Least sunny months in San Juan: January, February and December receive an average of 8 hours 30 minutes of sunshine daily.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Mean monthly sunshine hours | 228 | 265 | 314 | 326 | 350 | 338 | 337 | 337 | 294 | 295 | 280 | 280 |
Mean daily daylight hours | 10h 53m | 11h 23m | 12h 1m | 12h 41m | 13h 14m | 13h 30m | 13h 21m | 12h 52m | 12h 14m | 11h 34m | 11h 1m | 10h 44m |
San Juan experiences the highest level of ultraviolet (UV) radiation in April, May and September, when the maximum UV index can reach values of 14 - 15, which corresponds to the Extreme category of sun exposure.January, November and December are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 10. For more detailed information, check out our hourly San Juan UV Index data.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
UV Index (month maximum) | 8 | 11 | 13 | 14 | 15 | 14 | 14 | 14 | 14 | 12 | 10 | 8 |