Last updated: June 24, 2025
In April, the average temperature in Lewistown, United States is a chilly 3°C (38°F), with fluctuations ranging from a minimum of -20°C (-4°F) to a maximum of 26°C (80°F). Expect around 76 mm (3.0 in) of precipitation spread across 14 days, contributing to an average humidity of 72%. Be prepared for a mix of wintery chills and occasional warmth!
In April in Lewistown, the average temperature is 3°C (38°F), with maximums reaching 26°C (80°F) and minimums dropping as low as -20°C (-4°F). This wide temperature range makes it essential for travelers to pack layers to ensure comfort and adaptability for any weather conditions.
In Lewistown in April, the precipitation amount is 76 mm (3.0 in) spread over 14 days.
In Lewistown in April, humidity is 72%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that wraps around you, making outdoor activities less enjoyable and necessitating warm, water-resistant clothing for comfortable traveling.
In Lewistown 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 Lewistown.
UV Risk Categories
Weather in Lewistown varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Lewistown, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (25°F) | 25 mm (1.0 inches) | 81% | low |
| February Weather | -8°C (18°F) | 43 mm (1.7 inches) | 85% | moderate |
| March Weather | 0°C (32°F) | 29 mm (1.2 inches) | 77% | moderate |
| April Weather | 3°C (38°F) | 76 mm (3.0 inches) | 72% | very high |
| May Weather | 10°C (50°F) | 84 mm (3.3 inches) | 75% | very high |
| June Weather | 16°C (61°F) | 80 mm (3.2 inches) | 78% | very high |
| July Weather | 20°C (69°F) | 30 mm (1.2 inches) | 79% | very high |
| August Weather | 19°C (67°F) | 31 mm (1.2 inches) | 76% | very high |
| September Weather | 14°C (57°F) | 45 mm (1.8 inches) | 67% | very high |
| October Weather | 5°C (42°F) | 45 mm (1.8 inches) | 69% | moderate |
| November Weather | 1°C (34°F) | 34 mm (1.3 inches) | 78% | moderate |
| December Weather | -3°C (27°F) | 31 mm (1.2 inches) | 85% | low |