Last updated: August 27, 2025
In December, the average temperature in Santa Maria, Mexico hovers around 16°C (62°F). Expect cool evenings with a minimum of 3°C (38°F), while the days can warm up to a maximum of 29°C (85°F). Rainfall is light, with about 12 mm (0.5 in) spread across 2 days, and the average humidity sits at a comfortable 74%.
In December in Santa Maria, the average temperature is 16°C (62°F), with maximums reaching 29°C (85°F) and minimums dropping as low as 3°C (38°F). This variation in temperature makes it advisable for travelers to pack a range of clothing for both warm and cooler weather.
In Santa Maria in December, the precipitation amount is 12 mm (0.5 in) over the course of 2 days.
In Santa Maria in December, humidity is 74%. With an average temperature of 16°C (62°F), this humidity feels like a warm, heavy blanket enveloping you, making it slightly uncomfortable for traveling as it can lead to a sticky sensation that may sap your energy during outdoor activities.
In Santa Maria 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 Santa Maria.
UV Risk Categories
Weather in Santa Maria varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Santa Maria, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 16°C (62°F) | 9 mm (0.3 inches) | 64% | very high |
| February Weather | 18°C (65°F) | 14 mm (0.5 inches) | 57% | extreme |
| March Weather | 21°C (70°F) | 4 mm (0.1 inches) | 46% | extreme |
| April Weather | 22°C (72°F) | 1 mm (0.0 inches) | 42% | extreme |
| May Weather | 24°C (75°F) | 19 mm (0.7 inches) | 51% | extreme |
| June Weather | 23°C (74°F) | 112 mm (4.4 inches) | 74% | extreme |
| July Weather | 21°C (71°F) | 226 mm (8.9 inches) | 79% | extreme |
| August Weather | 21°C (71°F) | 197 mm (7.8 inches) | 81% | extreme |
| September Weather | 21°C (70°F) | 218 mm (8.6 inches) | 84% | extreme |
| October Weather | 21°C (69°F) | 69 mm (2.7 inches) | 75% | extreme |
| November Weather | 19°C (66°F) | 23 mm (0.9 inches) | 71% | very high |
| December Weather | 16°C (62°F) | 12 mm (0.5 inches) | 74% | very high |