Last updated: June 24, 2025
In December, the average temperature in Old Saybrook Center, United States hovers around 4°C (40°F), with extremes ranging from a chilly -11°C (12°F) to a pleasantly mild 16°C (61°F). Expect some wet weather, as 146 mm (5.8 in) of precipitation falls over about 11 days. With an average humidity of 80%, it's a month that feels both cool and damp—perfect for cozy indoor activities!
In December in Old Saybrook Center, the average temperature is 4°C (40°F). Maximum temperatures can reach 16°C (61°F), while minimums can plummet to -11°C (12°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.
In Old Saybrook Center in December, the total precipitation amount is 146 mm (5.8 in) recorded over a span of 11 days.
In Old Saybrook Center in December, humidity is 80%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and requiring careful planning for warmth and moisture management.
In Old Saybrook Center 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 Old Saybrook Center, you can visit Hourly UV Index in Old Saybrook Center.
UV Risk Categories
Weather in Old Saybrook Center varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Old Saybrook Center, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 1°C (35°F) | 82 mm (3.2 inches) | 84% | moderate |
| February Weather | 2°C (36°F) | 109 mm (4.3 inches) | 84% | moderate |
| March Weather | 4°C (39°F) | 106 mm (4.2 inches) | 82% | high |
| April Weather | 8°C (47°F) | 138 mm (5.4 inches) | 79% | very high |
| May Weather | 13°C (55°F) | 119 mm (4.7 inches) | 75% | very high |
| June Weather | 18°C (65°F) | 82 mm (3.2 inches) | 78% | very high |
| July Weather | 22°C (72°F) | 123 mm (4.8 inches) | 76% | very high |
| August Weather | 23°C (73°F) | 97 mm (3.8 inches) | 76% | very high |
| September Weather | 20°C (68°F) | 99 mm (3.9 inches) | 75% | very high |
| October Weather | 16°C (60°F) | 153 mm (6.0 inches) | 75% | high |
| November Weather | 9°C (48°F) | 108 mm (4.3 inches) | 80% | moderate |
| December Weather | 4°C (40°F) | 146 mm (5.8 inches) | 80% | low |