Climate Chart of Sun Valley, USA

Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023

Climate overview

Temperature

The monthly mean temperature is warmest in July, at 25.0 °C, and coolest in December, at 0.6 °C. These are averages for each month rather than daytime high temperatures, so they describe the broader monthly temperature pattern, not the peak warmth or chill a visitor might experience on a particular day. The unweighted mean across the calendar-month means is 11.7 °C. It offers a compact overview across the year, but does not indicate how temperatures are distributed within each month or from day to day.

Snow

Mean daily snowfall is highest in January, at 8.20 mm/day; the unweighted mean across monthly daily-snowfall means is 2.45 mm/day. These amounts do not establish how many days have snow, snow depth or snow cover, and they cannot indicate skiing conditions.

Rain

Mean daily rainfall is lowest in July, at 0.21 mm/day, and highest in December, at 1.14 mm/day. These figures are average daily amounts, not monthly totals; they do not reveal how often rain occurs or guarantee dry or wet conditions on a particular date. The unweighted mean of the monthly daily-rainfall means is 0.68 mm/day. It provides a broad reference rather than a forecast or a measure of rainfall frequency.

Sunshine

Mean daily sunshine reaches its highest value in June, at 13.44 hours/day, and its lowest in December, at 6.81 hours/day. These averages can help with planning around typical sunshine duration, but sunshine hours are not the same as day length and do not promise clear skies on any given day. The unweighted mean across the monthly sunshine means is 10.38 hours/day per day, a year-wide summary that does not describe conditions on individual dates.

Best Travel Time Guide for Sun Valley, USA: Ideal Seasons and Weather Insights

For visitors prioritising cooler monthly averages, December is the relevant reference, with a monthly mean temperature of 0.6 °C; pack with variable day-to-day conditions in mind, since a monthly mean is not a daily forecast. If lower average rainfall is the priority, July is the conditional option, with mean daily rainfall of 0.21 mm/day, but that average neither guarantees dry days nor tells you how often rain falls. For planning around rain, prepare for the possibility of wetter average conditions in December, when mean daily rainfall is 1.14 mm/day; this is not a monthly total or a prediction for a specific day. For outdoor sightseeing planned around typical sunshine duration, June has the highest mean daily sunshine at 13.44 hours/day, while December has the lowest at 6.81 hours/day. Sunshine duration does not equal daylight length, and these separate criteria do not combine into a universal best time to visit.

Snowfall planning should also account for the recorded mean daily snowfall peak in January, at 8.20 mm/day. This average cannot tell you whether snow will fall during a visit, how deep it may be, or whether snow cover or skiing conditions will be present.

Climate Data Overview for Sun Valley, USA

Explore the comprehensive climate data for Sun Valley, USA. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.

• See also climate change in Sun Valley
• Explore the climate in USA