Last updated: June 24, 2025
In April, the average temperature in Great Falls, United States is a comfortable 13°C (57°F), with temperatures ranging from a chilly -2°C (29°F) to a warm 32°C (90°F). Expect about 99 mm (3.9 in) of precipitation over 11 days, contributing to an average humidity of 81%. Be prepared for a mix of weather as you explore this vibrant destination!
In April in Great Falls, the average temperature is 13°C (57°F), with maximums reaching 32°C (90°F) and minimums dropping as low as -2°C (29°F). This range of temperatures makes Great Falls an ideal destination for travelers seeking a mix of mild and more extreme weather experiences.
In Great Falls, in April, the precipitation amount is 99 mm (3.9 in) over the course of 11 days.
In Great Falls in April, humidity is 81%. With an average temperature of 13°C (57°F), this humidity feels like a damp blanket wrapping around you, making it uncomfortable for traveling as it saps your energy and makes even short walks feel more exhausting.
In Great Falls 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 Great Falls.
UV Risk Categories
Weather in Great Falls varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Great Falls, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 2°C (37°F) | 60 mm (2.4 inches) | 84% | moderate |
| February Weather | 5°C (41°F) | 98 mm (3.9 inches) | 83% | moderate |
| March Weather | 8°C (46°F) | 84 mm (3.3 inches) | 83% | high |
| April Weather | 13°C (57°F) | 99 mm (3.9 inches) | 81% | very high |
| May Weather | 19°C (66°F) | 132 mm (5.2 inches) | 78% | very high |
| June Weather | 24°C (75°F) | 118 mm (4.7 inches) | 79% | very high |
| July Weather | 27°C (81°F) | 141 mm (5.5 inches) | 74% | very high |
| August Weather | 25°C (77°F) | 150 mm (5.9 inches) | 72% | very high |
| September Weather | 22°C (72°F) | 102 mm (4.0 inches) | 75% | very high |
| October Weather | 16°C (62°F) | 107 mm (4.2 inches) | 81% | high |
| November Weather | 8°C (47°F) | 86 mm (3.4 inches) | 85% | moderate |
| December Weather | 5°C (41°F) | 94 mm (3.7 inches) | 84% | moderate |