Last updated: June 24, 2025
In December, the average temperature in Arcadia, United States is a pleasant 19°C (67°F), with extremes ranging from a chilly 3°C (38°F) to a warm 31°C (89°F). Expect about 56 mm (2.2 in) of precipitation over 7 days, and enjoy a relatively high average humidity of 84%. Whether you’re exploring or relaxing, the weather is sure to set the perfect backdrop for your adventures!
In December in Arcadia, the average temperature is 19°C (67°F). Maximum temperatures can soar to 31°C (89°F), while minimums can drop to as low as 3°C (38°F). It’s a great time to visit if you enjoy mild weather with some warm and cooler moments.
In Arcadia in December, the total precipitation amount is 56 mm (2.2 in) over a period of 7 days.
In Arcadia in December humidity is 84%. With an average temperature of 19°C (67°F), this humidity feels like a warm, sticky embrace that can make traveling somewhat uncomfortable, as the air becomes thick and heavy, often leaving you feeling fatigued and in need of constant hydration.
In Arcadia in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Arcadia.
UV Risk Categories
Weather in Arcadia varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Arcadia, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 18°C (64°F) | 34 mm (1.3 inches) | 83% | high |
| February Weather | 21°C (70°F) | 45 mm (1.8 inches) | 80% | very high |
| March Weather | 22°C (71°F) | 20 mm (0.8 inches) | 75% | very high |
| April Weather | 24°C (76°F) | 63 mm (2.5 inches) | 68% | extreme |
| May Weather | 26°C (80°F) | 128 mm (5.0 inches) | 65% | extreme |
| June Weather | 27°C (81°F) | 241 mm (9.5 inches) | 73% | extreme |
| July Weather | 28°C (82°F) | 289 mm (11.4 inches) | 77% | extreme |
| August Weather | 28°C (82°F) | 265 mm (10.4 inches) | 80% | extreme |
| September Weather | 27°C (82°F) | 186 mm (7.3 inches) | 83% | extreme |
| October Weather | 26°C (79°F) | 72 mm (2.8 inches) | 83% | very high |
| November Weather | 22°C (71°F) | 45 mm (1.8 inches) | 83% | high |
| December Weather | 19°C (67°F) | 56 mm (2.2 inches) | 84% | moderate |