Last updated: June 24, 2025
In Lewistown, United States, the average temperature in June is a pleasant 21°C (71°F). However, be prepared for a bit of variety, as temperatures can dip to a low of 6°C (44°F) and soar to a high of 34°C (94°F). With 101 mm (4.0 in) of precipitation spread across 12 days, you might want to pack an umbrella. The average humidity is a comfortable 79%, making it a great time to explore!
In June in Lewistown, the average temperature is 21°C (71°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop as low as 6°C (44°F). This weather makes Lewistown an ideal destination for travelers seeking pleasant temperatures, but also a reminder to prepare for a range of conditions.
In Lewistown in June, the precipitation amount is 101 mm (4.0 in) spread over 12 days.
In Lewistown in June humidity is 79%. With an average temperature of 21°C (71°F), this humidity feels like a warm, sticky embrace that can make outdoor activities feel laborious and exhausting. Travelers should be prepared to hydrate frequently and take breaks in shaded areas to fully enjoy their time exploring.
In Lewistown in June, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check 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 June’s weather to other months in Lewistown, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (31°F) | 65 mm (2.6 inches) | 89% | moderate |
| February Weather | 1°C (34°F) | 104 mm (4.1 inches) | 90% | moderate |
| March Weather | 5°C (41°F) | 94 mm (3.7 inches) | 89% | high |
| April Weather | 11°C (51°F) | 102 mm (4.0 inches) | 88% | very high |
| May Weather | 17°C (62°F) | 120 mm (4.7 inches) | 80% | very high |
| June Weather | 21°C (71°F) | 101 mm (4.0 inches) | 79% | very high |
| July Weather | 24°C (76°F) | 121 mm (4.8 inches) | 74% | very high |
| August Weather | 23°C (74°F) | 102 mm (4.0 inches) | 64% | very high |
| September Weather | 20°C (68°F) | 129 mm (5.1 inches) | 67% | very high |
| October Weather | 14°C (57°F) | 113 mm (4.5 inches) | 81% | high |
| November Weather | 6°C (42°F) | 85 mm (3.3 inches) | 89% | moderate |
| December Weather | 2°C (36°F) | 91 mm (3.6 inches) | 88% | low |