Last updated: June 24, 2025
In March, the average temperature in Helena Valley Southeast, United States hovers around -2°C (29°F). However, be prepared for extremes, as temperatures can plunge to a frigid -30°C (-22°F) or soar up to a mild 16°C (61°F). Expect 38 mm (1.5 in) of precipitation spread across about 10 days, and don't forget to bundle up, as the average humidity sits at a chilly 83%.
In March in Helena Valley Southeast, the average temperature is -2°C (29°F), with maximums reaching 16°C (61°F) and minimums dropping as low as -30°C (-22°F). Travelers should be prepared for extreme temperature variations, packing accordingly for both cold and milder weather.
In Helena Valley Southeast in March, the precipitation amount is 38 mm (1.5 in) over the course of 10 days.
In Helena Valley Southeast in March, humidity is 83%. With an average temperature of -2°C (29°F), this humidity feels like a biting chill that seeps into your bones, making travel outside feel particularly uncomfortable and brisk, as the damp air enhances the cold sensation, leaving you longing for warmth and shelter.
In Helena Valley Southeast in March, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Helena Valley Southeast, you can refer to this Hourly UV Index in Helena Valley Southeast.
UV Risk Categories
Weather in Helena Valley Southeast varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in Helena Valley Southeast, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (20°F) | 23 mm (0.9 inches) | 87% | moderate |
| February Weather | -9°C (16°F) | 51 mm (2.0 inches) | 88% | moderate |
| March Weather | -2°C (29°F) | 38 mm (1.5 inches) | 83% | high |
| April Weather | 2°C (36°F) | 67 mm (2.7 inches) | 78% | very high |
| May Weather | 9°C (48°F) | 88 mm (3.5 inches) | 76% | very high |
| June Weather | 14°C (58°F) | 107 mm (4.2 inches) | 78% | extreme |
| July Weather | 19°C (67°F) | 31 mm (1.2 inches) | 77% | very high |
| August Weather | 18°C (65°F) | 34 mm (1.3 inches) | 71% | very high |
| September Weather | 13°C (55°F) | 44 mm (1.7 inches) | 68% | very high |
| October Weather | 4°C (40°F) | 41 mm (1.6 inches) | 72% | moderate |
| November Weather | -1°C (30°F) | 33 mm (1.3 inches) | 84% | moderate |
| December Weather | -6°C (21°F) | 33 mm (1.3 inches) | 90% | low |