Last updated: June 24, 2025
In December, the average temperature in South New Castle, United States hovers around 1°C (35°F), with a minimum dipping to -16°C (3°F) and a maximum reaching up to 17°C (63°F). This month also brings about 103 mm (4.0 in) of precipitation spread over approximately 11 days, contributing to a high average humidity of 86%.
In December in South New Castle, the average temperature is 1°C (35°F). Maximums can reach 17°C (63°F), and minimums can be as low as -16°C (3°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable.
In South New Castle in December, the total precipitation amount is 103 mm (4.0 in), occurring over the course of 11 days.
In South New Castle in December, humidity is 86%. With an average temperature of 1°C (35°F), this humidity feels like a biting chill that wraps around you, making outdoor exploration uncomfortable and requiring extra layers to stay warm while navigating the damp air.
In South New Castle 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 South New Castle, you can visit Hourly UV Index in South New Castle.
UV Risk Categories
Weather in South New Castle varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in South New Castle, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -2°C (29°F) | 98 mm (3.9 inches) | 88% | moderate |
February Weather | 0°C (33°F) | 111 mm (4.4 inches) | 88% | moderate |
March Weather | 4°C (40°F) | 108 mm (4.3 inches) | 87% | high |
April Weather | 10°C (50°F) | 139 mm (5.5 inches) | 87% | very high |
May Weather | 16°C (61°F) | 141 mm (5.6 inches) | 81% | very high |
June Weather | 20°C (69°F) | 138 mm (5.4 inches) | 83% | very high |
July Weather | 23°C (74°F) | 141 mm (5.5 inches) | 82% | very high |
August Weather | 22°C (72°F) | 99 mm (3.9 inches) | 76% | very high |
September Weather | 19°C (66°F) | 115 mm (4.5 inches) | 77% | very high |
October Weather | 13°C (56°F) | 125 mm (4.9 inches) | 82% | high |
November Weather | 5°C (41°F) | 103 mm (4.0 inches) | 89% | moderate |
December Weather | 1°C (35°F) | 103 mm (4.0 inches) | 86% | low |