Last updated: August 22, 2025
In December, the average temperature in Fontana, Argentina hovers around 26°C (80°F), offering a warm climate for outdoor activities. Temperatures can dip to a cool 13°C (56°F) while soaring to a blistering 40°C (104°F), showcasing a diverse range of conditions. Expect 77 mm (3.0 in) of precipitation spread over 6 days, and with an average humidity of 82%, be prepared for that sticky, tropical feel!
In December, in Fontana, the average temperature is 26°C (80°F). Maximums can reach 40°C (104°F) and minimums can be as low as 13°C (56°F). Travelers should be prepared for warm days and cooler evenings, making it ideal to pack layers for their trip.
In Fontana in December, the total precipitation amount is 77 mm (3.0 in) occurring over a span of 6 days.
In Fontana in December, humidity is 82%. With an average temperature of 26°C (80°F), this humidity feels like a heavy, warm blanket wrapping around you, making outdoor activities feel more exhausting and sweaty, which can be quite challenging for traveling.
In Fontana in December, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Fontana, you can check here.
UV Risk Categories
Weather in Fontana varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Fontana, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 28°C (82°F) | 141 mm (5.5 inches) | 76% | extreme |
| February Weather | 27°C (80°F) | 68 mm (2.7 inches) | 70% | extreme |
| March Weather | 25°C (77°F) | 135 mm (5.3 inches) | 73% | extreme |
| April Weather | 22°C (72°F) | 119 mm (4.7 inches) | 83% | very high |
| May Weather | 18°C (65°F) | 114 mm (4.5 inches) | 85% | high |
| June Weather | 16°C (62°F) | 53 mm (2.1 inches) | 73% | moderate |
| July Weather | 15°C (60°F) | 37 mm (1.4 inches) | 63% | high |
| August Weather | 17°C (64°F) | 36 mm (1.4 inches) | 44% | high |
| September Weather | 20°C (69°F) | 83 mm (3.3 inches) | 50% | very high |
| October Weather | 23°C (73°F) | 111 mm (4.4 inches) | 53% | extreme |
| November Weather | 25°C (77°F) | 148 mm (5.8 inches) | 66% | extreme |
| December Weather | 26°C (80°F) | 77 mm (3.0 inches) | 82% | extreme |