Sun Valley (Ketchum), Idaho weather in March
Temperature, rain and sunshine in March: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in March
Poor
Best time to visit: June, August – September
Best for skiing: December – April
What is the weather like in Sun Valley (Ketchum), Idaho in March?
In March, Sun Valley (Ketchum), Idaho is cold: daytime highs average 3 °C, and nights often drop below freezing (−8 °C). The sun shines for around 7 hours a day. Precipitation, often as snow, falls on about 9 days, totalling 47 mm. Snow falls on about 7 days. All in all, March is not an ideal month for a holiday in Sun Valley (Ketchum), Idaho.
March compared
How the weather changes from February to April. Tap a month to open it.
| FebruaryFeb | MarchMar | AprilApr | |
|---|---|---|---|
| Score | 30 | 31 | 45 |
| Day | −1° | 3° | 8° |
| Night | −12° | −8° | −4° |
| Sun | 6 h | 7 h | 8 h |
| Rain days | 8 | 9 | 9 |
More details for March
- Daylight
- 11 h 51 min07:52 – 19:42
- UV index
- 5 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 12 km/haverage daily peakAll months
- Cloud cover
- 57 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 7 days1 cm or more of fresh snowAll months
- Time zone
- UTC−6America/Boise
How the score comes together
- Temperatureweight 50 %0 %
- Sunshineweight 20 %60 %
- Few rainy daysweight 30 %64 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Mountain air”.
What to pack in March
- Sunscreen
- Warm jacket
- Hat, scarf & gloves
- Rain jacket or umbrella
Sun Valley (Ketchum), Idaho in March: quick answers
Is Sun Valley (Ketchum), Idaho hot in March?
No. In March, Sun Valley (Ketchum), Idaho is cold: daytime highs average 3 °C and nights drop to about −8 °C.
Does it rain much in Sun Valley (Ketchum), Idaho in March?
Rain is frequent, with about 9 rainy days and 47 mm in total.
Sun Valley (Ketchum), Idaho month by month
The whole year in Sun Valley (Ketchum), IdahoAll destinations: USAWhere to go in March
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences