Respiratory exchange ratio. The respiratory exchange ratio (RER) is the ratio between the amount of carbon dioxide (CO2) produced in metabolism and oxygen (O2) used.[1] Humans typically inhale more molecules of oxygen than they exhale of carbon dioxide because air contains much more oxygen by volume.
Jackson Hole Wyoming Weather & Seasons. 1  The busiest season in Jackson is the summer, particularly in July and August where visitors can enjoy temps between 70 and 90 degrees. September is still summery in temperature (besides cold nights), but is quieter. The fall months, October and November, are unpredictable.
Best Times to Visit Jackson Hole The best times to visit Jackson Hole are the months of April, May, September and October. Although the weather during these shoulder seasons can be unpredictable â temperatures can range anywhere from the low 30s to the low 60s â you can expect to find prices at their lowest and a region practically free of tourists.