Last updated: March 2, 2024
Under the Köppen–Geiger climate classification San Juan Bautista features a warm-summer Mediterranean climate (Csb). Temperatures typically range between 10 °C (50 °F) and 19 °C (67 °F) through the year, but rarely can drop to -3 °C (27 °F) or can rise to as high as 38 °C (101 °F). The average annual precipitation amounts to about 440 mm (17.3 inches) and receives 48 rainy days on the 1 mm (0.04 inches) threshold annually. San Juan Bautista enjoys an average of 3486 hours of sunshine throughout the year, and daylight varies from 9 hours 39 minutes to 14 hours 37 minutes per day.
The warmest months in San Juan Bautista are July, August and September, with daily mean temperatures ranging from 18 to 19 °C (65 - 67 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 10 to 10 °C (50 - 51 °F) throughout the day. On average each year, San Juan Bautista experiences 52 days above 25 °C (77.0 °F) and 4 days below 0 °C (32.0 °F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum | 23°C (74°F) |
26°C (78°F) |
26°C (79°F) |
31°C (88°F) |
31°C (87°F) |
34°C (94°F) |
31°C (89°F) |
36°C (98°F) |
38°C (101°F) |
32°C (90°F) |
27°C (81°F) |
25°C (77°F) |
| Mean maximum | 20°C (69°F) |
22°C (72°F) |
24°C (75°F) |
27°C (80°F) |
27°C (81°F) |
30°C (87°F) |
30°C (86°F) |
32°C (90°F) |
33°C (92°F) |
30°C (86°F) |
25°C (77°F) |
21°C (70°F) |
| Average high | 15°C (60°F) |
16°C (61°F) |
17°C (62°F) |
19°C (66°F) |
20°C (69°F) |
23°C (74°F) |
25°C (77°F) |
25°C (78°F) |
25°C (77°F) |
23°C (74°F) |
19°C (66°F) |
15°C (60°F) |
| Daily mean | 10°C (50°F) |
10°C (51°F) |
11°C (53°F) |
13°C (56°F) |
14°C (58°F) |
17°C (63°F) |
18°C (65°F) |
19°C (67°F) |
18°C (65°F) |
16°C (61°F) |
13°C (55°F) |
10°C (50°F) |
| Average low | 6°C (42°F) |
5°C (41°F) |
6°C (44°F) |
8°C (47°F) |
10°C (50°F) |
12°C (54°F) |
13°C (56°F) |
14°C (58°F) |
13°C (56°F) |
10°C (51°F) |
7°C (45°F) |
5°C (41°F) |
| Mean minimum | -1°C (31°F) |
-1°C (31°F) |
1°C (34°F) |
4°C (39°F) |
6°C (43°F) |
8°C (47°F) |
10°C (51°F) |
12°C (53°F) |
9°C (48°F) |
5°C (42°F) |
2°C (36°F) |
-1°C (31°F) |
| Minimum | -3°C (28°F) |
-3°C (27°F) |
-0°C (32°F) |
2°C (36°F) |
4°C (39°F) |
7°C (45°F) |
9°C (49°F) |
11°C (52°F) |
7°C (45°F) |
3°C (38°F) |
-1°C (31°F) |
-2°C (28°F) |
Compare temperature, precipitation, sunshine, UV index in San Juan Bautista, California, United States with other places around the world.
San Juan Bautista usually has the most precipitation in January, March and December, with an average of 9 rainy days and 88 mm (3.5 inches) of precipitation per month. The driest months in San Juan Bautista are June, July and August. On average, 1 mm (0.0 inches) of precipitation falls during these months.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average precipitation mm (inches) | 99 (3.9) | 76 (3.0) | 83 (3.3) | 26 (1.0) | 17 (0.7) | 1 (0.0) | 0 (0.0) | 1 (0.0) | 5 (0.2) | 15 (0.6) | 32 (1.3) | 83 (3.3) |
| Average precipitation days (≥ 1 mm) | 8 | 8 | 12 | 4 | 3 | 0 | 0 | 0 | 0 | 1 | 4 | 8 |
The sunniest months in San Juan Bautista are May, June and July, when the sun shines an average of 12 hours 18 minutes a day. Least sunny months in San Juan Bautista: January, February and December receive an average of 6 hours 29 minutes of sunshine daily.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean monthly sunshine hours | 161 | 221 | 265 | 303 | 363 | 379 | 389 | 357 | 315 | 289 | 233 | 206 |
| Mean daily daylight hours | 9h 56m | 10h 50m | 11h 59m | 13h 9m | 14h 8m | 14h 37m | 14h 21m | 13h 29m | 12h 21m | 11h 11m | 10h 10m | 9h 39m |
San Juan Bautista experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 11 - 11, which corresponds to the Extreme category of sun exposure. January, February and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 5. For more detailed information, check out our hourly San Juan Bautista UV Index data.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV Index (month maximum) | 4 | 5 | 8 | 9 | 11 | 11 | 11 | 10 | 9 | 7 | 5 | 3 |
Discover in-depth weather details for every month in San Juan Bautista. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about San Juan Bautista's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.
Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.