Last updated: June 24, 2025
In March, the average temperature in Helena Valley Northwest, United States hovers around -1°C (31°F). While you might experience chilly days with a minimum drop to -30°C (-21°F), warmer spells can reach up to 19°C (66°F). Expect 30 mm (1.2 in) of precipitation spread across 8 days, contributing to an average humidity of 83%. Prepare for a mix of winter chill and occasional warmth!
In March in Helena Valley Northwest, the average temperature is -1°C (31°F). Maximum can reach 19°C (66°F) and minimum can be as low as -30°C (-21°F). Travelers should be prepared for a wide range of temperatures, from chilly days to surprisingly warm spells.
In Helena Valley Northwest in March, the precipitation amount is 30 mm (1.2 in) over the course of 8 days.
In Helena Valley Northwest in March humidity is 83%. With an average temperature of -1°C (31°F), this humidity feels like a heavy, icy blanket enveloping you, making each step outside feel like a struggle against the cold, damp air that clings to your skin, often leaving you wishing for warmth and refuge indoors.
In Helena Valley Northwest 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 Northwest, you can refer to this Hourly UV Index in Helena Valley Northwest.
UV Risk Categories
Weather in Helena Valley Northwest varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in Helena Valley Northwest, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -6°C (22°F) | 19 mm (0.7 inches) | 87% | moderate |
| February Weather | -8°C (18°F) | 44 mm (1.7 inches) | 88% | moderate |
| March Weather | -1°C (31°F) | 30 mm (1.2 inches) | 83% | high |
| April Weather | 4°C (39°F) | 59 mm (2.3 inches) | 78% | very high |
| May Weather | 10°C (51°F) | 64 mm (2.5 inches) | 76% | very high |
| June Weather | 16°C (60°F) | 78 mm (3.1 inches) | 78% | very high |
| July Weather | 21°C (69°F) | 17 mm (0.7 inches) | 77% | very high |
| August Weather | 20°C (67°F) | 23 mm (0.9 inches) | 71% | very high |
| September Weather | 14°C (57°F) | 37 mm (1.5 inches) | 68% | very high |
| October Weather | 5°C (41°F) | 35 mm (1.4 inches) | 72% | moderate |
| November Weather | 0°C (32°F) | 29 mm (1.1 inches) | 84% | moderate |
| December Weather | -4°C (25°F) | 30 mm (1.2 inches) | 90% | low |