Last updated: June 24, 2025
In January, the average temperature in New Castle, United States hovers around 2°C (35°F). Expect a chilly atmosphere, with minimums plunging to -20°C (-3°F) and maximums reaching 21°C (70°F). The month brings 73 mm (2.9 in) of precipitation spread over 9 days, contributing to a notably high average humidity of 87%. Prepare for a wet and cool experience!
In January in New Castle, the average temperature is 2°C (35°F). Maximum can reach 21°C (70°F) and minimum can be as low as -20°C (-3°F). Be prepared for a wide range of temperatures to make the most of your travel adventure.
In New Castle in January, the precipitation amount is 73 mm (2.9 in), occurring over the course of 9 days.
In New Castle in January, humidity is 87%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling feel uncomfortable and heavy, as each breath carries a hint of the cold, moist air that lingers around you.
In New Castle in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in New Castle, you can check the information here.
UV Risk Categories
Weather in New Castle varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in New Castle, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 2°C (35°F) | 73 mm (2.9 inches) | 87% | moderate |
February Weather | 5°C (41°F) | 111 mm (4.4 inches) | 87% | high |
March Weather | 7°C (46°F) | 82 mm (3.2 inches) | 86% | very high |
April Weather | 12°C (55°F) | 120 mm (4.7 inches) | 84% | very high |
May Weather | 17°C (64°F) | 147 mm (5.8 inches) | 83% | very high |
June Weather | 21°C (70°F) | 117 mm (4.6 inches) | 83% | extreme |
July Weather | 24°C (75°F) | 78 mm (3.1 inches) | 79% | extreme |
August Weather | 23°C (73°F) | 109 mm (4.3 inches) | 66% | very high |
September Weather | 20°C (68°F) | 114 mm (4.5 inches) | 68% | very high |
October Weather | 15°C (58°F) | 114 mm (4.5 inches) | 78% | high |
November Weather | 6°C (44°F) | 75 mm (3.0 inches) | 89% | moderate |
December Weather | 4°C (39°F) | 98 mm (3.9 inches) | 86% | moderate |