Last updated: June 24, 2025
In April, the average temperature in Decatur, United States hovers around 8°C (47°F). Temperatures can range from a chilly -8°C (18°F) to a warm 27°C (81°F). Expect about 97 mm (3.8 in) of precipitation over 12 days, and prepare for a high average humidity of 85%.
In April in Decatur, the average temperature is 8°C (47°F). Maximum temperatures can reach 27°C (81°F), while minimums can drop as low as -8°C (18°F). Be prepared for a wide range of temperatures when traveling during this month.
In Decatur in April, the precipitation amount is 97 mm (3.8 in) spread over 12 days.
In Decatur in April humidity is 85%. With an average temperature of 8°C (47°F), this humidity feels like a chilly dampness that clings to your skin, making outdoor activities feel less refreshing and more uncomfortable for traveling.
In Decatur 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 Decatur.
UV Risk Categories
Weather in Decatur varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Decatur, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 55 mm (2.2 inches) | 85% | moderate |
| February Weather | -5°C (24°F) | 54 mm (2.1 inches) | 85% | moderate |
| March Weather | 3°C (37°F) | 59 mm (2.3 inches) | 85% | high |
| April Weather | 8°C (47°F) | 97 mm (3.8 inches) | 85% | very high |
| May Weather | 16°C (60°F) | 136 mm (5.3 inches) | 78% | very high |
| June Weather | 22°C (71°F) | 124 mm (4.9 inches) | 80% | very high |
| July Weather | 24°C (75°F) | 78 mm (3.1 inches) | 78% | very high |
| August Weather | 22°C (72°F) | 106 mm (4.2 inches) | 76% | very high |
| September Weather | 19°C (66°F) | 118 mm (4.6 inches) | 79% | very high |
| October Weather | 11°C (52°F) | 113 mm (4.5 inches) | 83% | moderate |
| November Weather | 3°C (37°F) | 43 mm (1.7 inches) | 88% | moderate |
| December Weather | -1°C (30°F) | 49 mm (1.9 inches) | 81% | low |