Last updated: June 24, 2025
In April, the average temperature in New Castle, United States hovers around 13°C (55°F). However, be prepared for a range from a chilly -1°C (30°F) to a warm 31°C (88°F). This month typically sees 105 mm (4.1 in) of precipitation over 11 days, contributing to an average humidity of 81%—making it a time for both cozy indoor activities and refreshing outdoor adventures!
In April in New Castle, the average temperature is 13°C (55°F). Maximum temperatures can reach up to 31°C (88°F), while minimum temperatures can drop as low as -1°C (30°F). Overall, it's advisable to pack for both warm and cold weather if you're planning to travel during this month.
In New Castle in April, the precipitation amount is 105 mm (4.1 in) over the course of 11 days.
In New Castle in April, humidity is 81%. With an average temperature of 13°C (55°F), this humidity feels like a damp blanket wrapping around you, making strolls outdoors feel heavy and slightly oppressive, which may be less than ideal for travelers looking to explore comfortably.
In New Castle in April, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in New Castle.
UV Risk Categories
Weather in New Castle varies notably across the year, with each month offering distinct climate conditions. This page compares April’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 (36°F) | 64 mm (2.5 inches) | 84% | moderate |
| February Weather | 4°C (39°F) | 103 mm (4.1 inches) | 83% | moderate |
| March Weather | 7°C (45°F) | 106 mm (4.2 inches) | 83% | high |
| April Weather | 13°C (55°F) | 105 mm (4.1 inches) | 81% | very high |
| May Weather | 18°C (65°F) | 135 mm (5.3 inches) | 78% | very high |
| June Weather | 23°C (74°F) | 118 mm (4.7 inches) | 79% | very high |
| July Weather | 26°C (79°F) | 136 mm (5.4 inches) | 74% | very high |
| August Weather | 25°C (77°F) | 140 mm (5.5 inches) | 72% | very high |
| September Weather | 22°C (71°F) | 100 mm (3.9 inches) | 75% | very high |
| October Weather | 16°C (61°F) | 109 mm (4.3 inches) | 81% | high |
| November Weather | 8°C (47°F) | 83 mm (3.3 inches) | 85% | moderate |
| December Weather | 4°C (40°F) | 100 mm (3.9 inches) | 84% | moderate |