Last updated: June 24, 2025
In April, the average temperature in Rock Falls, United States hovers around 9°C (49°F), with a minimum dipping to -8°C (17°F) and a maximum soaring to 28°C (84°F). Expect 110 mm (4.3 in) of precipitation over 11 days, contributing to an average humidity level of 85%. Whether you're dressing for cool breezes or occasional showers, prepare for a month of varied weather!
In April in Rock Falls, the average temperature is 9°C (49°F). Maximum temperatures can reach 28°C (84°F), while minimums can drop as low as -8°C (17°F). Travelers should be prepared for a wide range of weather conditions during this time.
In Rock Falls in April, the precipitation amount is 110 mm (4.3 in) spread over 11 days.
In Rock Falls in April humidity is 85%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making every step outside a challenge as the moisture in the air weighs heavily and lingers, transforming even simple outings into a quest for comfort.
In Rock Falls 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 Rock Falls.
UV Risk Categories
Weather in Rock Falls varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Rock Falls, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (24°F) | 59 mm (2.3 inches) | 82% | moderate |
| February Weather | -3°C (26°F) | 59 mm (2.3 inches) | 83% | moderate |
| March Weather | 4°C (40°F) | 86 mm (3.4 inches) | 84% | high |
| April Weather | 9°C (49°F) | 110 mm (4.3 inches) | 85% | very high |
| May Weather | 17°C (62°F) | 157 mm (6.2 inches) | 79% | very high |
| June Weather | 23°C (73°F) | 141 mm (5.6 inches) | 82% | very high |
| July Weather | 24°C (76°F) | 98 mm (3.8 inches) | 80% | very high |
| August Weather | 23°C (73°F) | 73 mm (2.9 inches) | 81% | very high |
| September Weather | 20°C (68°F) | 115 mm (4.5 inches) | 80% | very high |
| October Weather | 12°C (54°F) | 115 mm (4.5 inches) | 82% | high |
| November Weather | 4°C (39°F) | 51 mm (2.0 inches) | 88% | moderate |
| December Weather | 0°C (32°F) | 50 mm (2.0 inches) | 84% | low |