Sun Valley weather in March
March in Sun Valley: cold, a little rain, with very humid — one of the best months to visit.
#1 of 12 months in Sun Valley · #2 of 604 destinations to visit in March · comfort 96/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Sun Valley climate normals — March
| Daytime high | 3°C / 38°F | 🧥 cold |
|---|---|---|
| Nighttime low | -7°C / 19°F | |
| Feels like (high) | 0°C / 32°F | |
| Rainfall | 52 mm / 2 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 75% | 💦 very humid |
| Dew point | -7°C / 19°F | |
| Sunshine | 9.9 h/day | |
| Daylight | 11.9 h | |
| Wind | 11 km/h / 7 mph | |
| Snowfall | 39.2 cm / 15.4 in | |
| Air quality (US AQI) | 53 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Sun Valley?
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Sun Valley in March — FAQ
- Is March a good time to visit Sun Valley?
- March in Sun Valley: cold, a little rain, with very humid — one of the best months to visit. It ranks #1 of 12 months for Sun Valley on SeasonMap's comfort score (96/100).
- What is the weather like in Sun Valley in March?
- In March, Sun Valley averages a daily high of 3.2°C and a low of -7.1°C, with about 51.7 mm of rain over roughly 10 rainy days.
- What is the air quality in Sun Valley in March?
- Sun Valley has a mean US Air Quality Index of about 53 in March.
- Does it snow in Sun Valley in March?
- Sun Valley sees roughly 39.2 cm of snowfall in March.