Last updated: June 24, 2025
In April, the average temperature in Arlington Heights, United States hovers around 9°C (48°F). Expect a temperature range that can dip to a brisk -7°C (19°F) and soar up to a warm 29°C (84°F). With 115 mm (4.5 in) of precipitation spread across 13 days, you might want to carry an umbrella! The average humidity during this month is a substantial 85%, adding to the overall atmosphere of the region.
In April in Arlington Heights, the average temperature is 9°C (48°F). Maximum temperatures can reach 29°C (84°F), while the minimum can be as low as -7°C (19°F). Be prepared for a wide range of weather conditions if you're planning to travel during this month.
In Arlington Heights in April, the precipitation amount is 115 mm (4.5 in) spread over 13 days.
In Arlington Heights in April humidity is 85%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill enveloping you, making outdoor activities less enjoyable and requiring extra layers to stay warm and comfortable while traveling.
In Arlington Heights 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 Arlington Heights.
UV Risk Categories
Weather in Arlington Heights varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Arlington Heights, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (26°F) | 61 mm (2.4 inches) | 82% | moderate |
| February Weather | -2°C (28°F) | 60 mm (2.4 inches) | 83% | moderate |
| March Weather | 4°C (39°F) | 79 mm (3.1 inches) | 84% | high |
| April Weather | 9°C (48°F) | 115 mm (4.5 inches) | 85% | very high |
| May Weather | 15°C (60°F) | 164 mm (6.4 inches) | 79% | very high |
| June Weather | 21°C (71°F) | 134 mm (5.3 inches) | 82% | very high |
| July Weather | 24°C (75°F) | 105 mm (4.1 inches) | 80% | very high |
| August Weather | 23°C (73°F) | 92 mm (3.6 inches) | 81% | very high |
| September Weather | 20°C (68°F) | 85 mm (3.3 inches) | 80% | very high |
| October Weather | 12°C (54°F) | 127 mm (5.0 inches) | 82% | high |
| November Weather | 4°C (39°F) | 55 mm (2.2 inches) | 88% | moderate |
| December Weather | 0°C (33°F) | 53 mm (2.1 inches) | 84% | low |