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.
The temperature in Jackson Hole can vary quite a bit from one hour to the next, so a general rule of thumb is to dress in layers. In the summer, it is not uncommon to wake up to temps in the 30s and then put shorts on later in the day as the temperature rises into the 70s. This is common in the mountains.