Last updated: August 27, 2025
In April, the average temperature in Marathon, United States hovers around 7°C (45°F), with a notable range where the minimum can dip to -6°C (21°F) and the maximum can reach a pleasant 26°C (79°F). This month also experiences an average precipitation of 123 mm (4.9 in), typically spread over 16 days. Expect high levels of humidity as well, averaging around 88%, making for a cool yet damp atmosphere.
In April in Marathon, the average temperature is 7°C (45°F). The maximum can reach 26°C (79°F), while the minimum can drop as low as -6°C (21°F). This climate offers a variety of weather experiences, making it an ideal time for travelers to enjoy both the warmth of the sunny days and the crispness of the cool nights.
In Marathon in April, the total precipitation amount is 123 mm (4.9 in), occurring over the course of 16 days.
In Marathon in April humidity is 88%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable as you navigate through a heavy, thick atmosphere that clings to your skin.
In Marathon in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Marathon.
UV Risk Categories
Weather in Marathon varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Marathon, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (24°F) | 89 mm (3.5 inches) | 90% | moderate |
| February Weather | -3°C (27°F) | 97 mm (3.8 inches) | 90% | moderate |
| March Weather | 1°C (33°F) | 91 mm (3.6 inches) | 87% | high |
| April Weather | 7°C (45°F) | 123 mm (4.9 inches) | 88% | very high |
| May Weather | 14°C (57°F) | 137 mm (5.4 inches) | 82% | very high |
| June Weather | 18°C (66°F) | 107 mm (4.2 inches) | 79% | very high |
| July Weather | 21°C (71°F) | 159 mm (6.3 inches) | 78% | very high |
| August Weather | 20°C (69°F) | 120 mm (4.7 inches) | 76% | very high |
| September Weather | 17°C (62°F) | 100 mm (3.9 inches) | 78% | very high |
| October Weather | 11°C (52°F) | 154 mm (6.1 inches) | 84% | high |
| November Weather | 3°C (37°F) | 103 mm (4.0 inches) | 89% | moderate |
| December Weather | -1°C (30°F) | 102 mm (4.0 inches) | 86% | low |