Winter in Jackson Hole ranges from early November to early April. Average high temperatures in the valley during the winter season range from 27F to 52F, (-3C to 11C), but daily temperatures can fluctuate far below freezing at times. The valley floor will typically see snow from October through April and in the high alpine elevations, it usually snows from September to June. The high elevation of Jackson Hole has been known to create wild temperature fluctuations from night to day, sometimes by 50F degrees or more. It is important to come prepared for winter conditions, as they can vary.
Average highs and lows by winter months:
November: Average High 39F/4C, Average Low 16F/-8C
December: Average High 28F/-2C, Average Low 6F/-14C
January: Average High 27F/-3C, Average Low 5F/-15C
February: Average High 32F/0C, Average Low 8F/-13C
March: Average High 41F/5C, Average Low 16F/-9C
April: Average High 52F/11C, Average Low 24F/-4C