It’s a better measure of just how much moisture is in the air at any given time. So when you want to gauge the comfort of a summer air mass in Minnesota it’s usually better to use the dew point. Greater than or equal to 65: lots of moisture in the air, becoming oppressive 11 mph NNW 55 Humidity 8 ☏ Dew Point 10 ☏ Comfort Level 10 mi Visibility 29.99 in Barometric Pressure Air Quality Current Time : 11:21 PM CST Nearest / Estimated. Less than or equal to 55: dry and comfortableīetween 55 and 65: becoming "sticky" with muggy evenings MyForecast is a comprehensive resource for online weather forecasts and reports for over 72,000 locations worldcwide. General comfort levels USING DEW POINT that can be expected during the summer months: The higher the dew point, the muggier it will feel. So if you want a real judge of just how "dry" or "humid" it will feel outside, look at the dew point instead of the RH. It would feel much more "humid" on the 80 degree day with 50% relative humidity than on the 30 degree day with a 100% relative humidity. For example, a temperature of 30 and a dew point of 30 will give you a relative humidity of 100%, but a temperature of 80 and a dew point of 60 produces a relative humidity of 50%. Many times, relative humidity can be misleading. This directly affects how "comfortable" it will feel outside. The higher the dew point rises, the greater the amount of moisture in the air. If the air were to be cooled even more, water vapor would have to come out of the atmosphere in the liquid form, usually as fog or precipitation. At this point the air cannot hold more water in the gas form. The dew point is the temperature the air needs to be cooled to (at constant pressure) in order to achieve a relative humidity (RH) of 100%. Here’s another example from the National Weather Service. Current weather in Minneapolis and forecast for today, tomorrow, and next 14 days. Twin Cities National Weather Service office That means there was still the same amount of water vapor in the air as at 2:53 a.m. But the dew point remained at 50 degrees. The temperature was 58 degrees and the dew point was 50 degrees.Īt 9:53 a.m., the relative humidity dropped to 53 percent as the temperature rose to 68 degrees. Relative humidity can vary greatly throughout the day, even though the dew point stays the same. Dew point is an absolute measure of moisture in the atmosphere, thus a better indicator of comfort. It’s relative compared to the air temperatures at any given time. What we call humidity is actually relative humidity. Dew point and humidityĪ note about using humidity as a comfort guide. That means there’s less than half the amount of water vapor in the atmosphere than in tropical air masses when dew points hover around 70 degrees. National Oceanic and Atmospheric Administration
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