Last updated: June 24, 2025
In Northwest Ithaca, United States, the average temperature for December hovers around 0°C (32°F), creating a chilly atmosphere. Expect minimums that can dip to -17°C (1°F) and maximums reaching up to 17°C (63°F). With an average precipitation of 97 mm (3.8 in) spread over 15 days, and a high average humidity of 86%, it's a month where cozy layers are essential for comfort.
In December in Northwest Ithaca, the average temperature is 0°C (32°F). The maximum can reach 17°C (63°F), and the minimum can be as low as -17°C (1°F). Travelers should be prepared for chilly conditions and dress in layers to enjoy their visit comfortably.
In Northwest Ithaca in December, the total precipitation amount is 97 mm (3.8 in) spread over 15 days.
In Northwest Ithaca in December humidity is 86%. With an average temperature of 0°C (32°F), this humidity feels like a biting chill that seeps into your bones, making travel feel uncomfortable and damp, as the cold air combines with the moisture to create a brisk sensation that may deter outdoor exploration.
In Northwest Ithaca in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Northwest Ithaca, you can visit Hourly UV Index in Northwest Ithaca.
UV Risk Categories
Weather in Northwest Ithaca varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Northwest Ithaca, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (26°F) | 82 mm (3.2 inches) | 90% | moderate |
| February Weather | -2°C (28°F) | 89 mm (3.5 inches) | 90% | moderate |
| March Weather | 1°C (34°F) | 85 mm (3.4 inches) | 87% | high |
| April Weather | 8°C (46°F) | 118 mm (4.6 inches) | 88% | very high |
| May Weather | 14°C (58°F) | 127 mm (5.0 inches) | 82% | very high |
| June Weather | 19°C (67°F) | 95 mm (3.7 inches) | 79% | very high |
| July Weather | 22°C (72°F) | 146 mm (5.8 inches) | 78% | very high |
| August Weather | 21°C (70°F) | 100 mm (3.9 inches) | 76% | very high |
| September Weather | 17°C (64°F) | 91 mm (3.6 inches) | 78% | very high |
| October Weather | 12°C (53°F) | 150 mm (5.9 inches) | 84% | high |
| November Weather | 4°C (39°F) | 95 mm (3.7 inches) | 89% | moderate |
| December Weather | 0°C (32°F) | 97 mm (3.8 inches) | 86% | low |