Climate Chart of Jackson Hole, USA

Climate overview

Temperature

The monthly mean temperature is highest in July, at 19.0 °C, and lowest in December, at -6.9 °C. These are monthly averages, not daytime maximum or minimum readings, so they describe the overall temperature level of each month rather than the full range a visitor might experience during a day. Across the calendar-month means, the unweighted mean is 4.3 °C. It is a useful summary of the year’s monthly temperature profile, but it is not a day-weighted annual average and does not indicate how temperatures vary from one day to the next.

Snow

Mean daily snowfall is highest in February, at 21.44 mm/day; the unweighted mean of the monthly snowfall averages is 9.38 mm/day. These amounts describe average daily snowfall, not the number of snowy days, snow depth or snow cover, and they do not establish skiing conditions.

Rain

Mean daily rainfall is lowest in January, at 0.01 mm/day, making it the option indicated by these data for visitors prioritising lower average rainfall. The highest monthly mean is in September, at 1.59 mm/day; visitors planning around that month may want to prepare for rain. These are daily averages, not monthly totals, and neither figure tells you how often rain falls or guarantees dry or wet days. The unweighted mean of the monthly mean daily rainfall amounts is 0.64 mm/day. It summarises the monthly averages without describing the timing or frequency of individual rain events.

Sunshine

Mean daily sunshine reaches its highest monthly value in July, at 13.42 hours/day, and its lowest in December, at 5.03 hours/day. These figures can help with planning daylight outdoor activities, but sunshine duration is not the same as day length and does not promise clear skies on a particular day. The unweighted mean across the monthly sunshine averages is 9.33 hours/day per day. It is a broad summary rather than a forecast of the sunshine available during any individual visit.