Last updated: August 27, 2025
In San Ramon, Mexico, the average temperature in December hovers around 15°C (60°F), offering a pleasant climate. Expect minimums to dip to 1°C (34°F) and maximums to rise to 29°C (85°F). With only 4 mm (0.1 in) of precipitation occurring over 0 days, outdoor activities are likely to be enjoyable. Furthermore, the average humidity sits at a comfortable 81%, making this month a delightful time to explore!
In December in San Ramon, the average temperature is 15°C (60°F). The maximum can reach 29°C (85°F), while the minimum can be as low as 1°C (34°F). This diverse climate makes San Ramon an ideal destination for travelers seeking a mix of warm and cool weather experiences.
In San Ramon in December, the precipitation amount is 4 mm (0.1 in) recorded over a span of 0 days.
In San Ramon in December, humidity is 81%. With an average temperature of 15°C (60°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sluggish and draining, which can challenge even the best-prepared traveler.
In San Ramon in December, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in San Ramon.
UV Risk Categories
Weather in San Ramon varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in San Ramon, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 15°C (60°F) | 3 mm (0.1 inches) | 74% | very high |
| February Weather | 18°C (64°F) | 6 mm (0.2 inches) | 65% | extreme |
| March Weather | 20°C (69°F) | 9 mm (0.3 inches) | 58% | extreme |
| April Weather | 22°C (72°F) | 7 mm (0.3 inches) | 58% | extreme |
| May Weather | 23°C (74°F) | 55 mm (2.2 inches) | 67% | extreme |
| June Weather | 22°C (71°F) | 156 mm (6.1 inches) | 76% | extreme |
| July Weather | 20°C (69°F) | 135 mm (5.3 inches) | 67% | extreme |
| August Weather | 20°C (69°F) | 139 mm (5.5 inches) | 68% | extreme |
| September Weather | 20°C (68°F) | 157 mm (6.2 inches) | 81% | extreme |
| October Weather | 19°C (67°F) | 47 mm (1.8 inches) | 83% | extreme |
| November Weather | 17°C (63°F) | 19 mm (0.8 inches) | 84% | very high |
| December Weather | 15°C (60°F) | 4 mm (0.1 inches) | 81% | very high |