Since we can never have more than 100% humidity, dew point will never exceed the air temperature. But as you now know a dew point of 90° with an air temperature of 90° is also at 100% relative humidity but with a lot more water! Fortunately for us our dew point almost never exceeds 80° in Milwaukee. So a dew point of 60° with an air temperature of 60° is at 100% relative humidity. The dew point is what the air temperature would have to be for relative humidity to be at 100%. So how do we measure if a day is going to be humid or not? We do it with dew point temperature which we shorten to dew point. It’s the same amount of water in the same volume of air, but since the humidity is relative to the temperature (and pressure which we did not change) the relative humidity is very different. of water would only bring the relative humidity to 35%. But what if we raise the temperature to 90°? At this temperature the same box of air can hold about 31 ml. to the box would raise the relative humidity to 100%. At 60° that box can hold about 11 grams or 11 ml. But how much water the air in the box can hold all depends on the temperature. If you spill a bit of water into the box the air inside would eventually make the water evaporate until it’s all gone. Let’s say you have a box of air about 3ft. Dew point on the other hand almost never fails. But that first word, "relative" is important to the term since it tells us why it won’t always indicate how humid it feels outside. In fact my high school football coach would call me Zollitsch and then proceed to call me things I cannot mention in a family friendly blog. People I know call me Zollitsch all the time. It just takes a fan, that would even hardly turn up on your power bill."Īccording to the NIWA forecast, the humid weather in the North Island will not ease until next week, as more rain and air from the tropics is expected to arrive over the weekend.We always seem to drop the first name of “relative humidity” to just plain old “humidity”. Warming and cooling air is expensive, but moving air is cheap as chips. "This is the cheapest, best, most eco friendly way that the average person can cool down. He got the idea from his grandmother who lived in a hot apartment in New Jersey, and he's been using the trick ever since. "Immediately you'll be exhausting warmer air out of your home and bringing in cool air." He said if you turn you fan around and point it out the window to blow the hot air out, it'll cool your room down far more effectively than if it faces into the room. Nelson Lebo is the Palmerston North City Council's Eco Advisor, and has a solution he swears by. You get hotter easier, so that's why even when the temperature itself isn't particularly hot, our ability to cool down is affected."įor a way to deal with this intolerable humidity we head to balmy Palmy. "However, when the air is already full of moisture it's not as effective, and so you don't cool down as quickly. ![]() If the air is dry, then that's quite easy for your body to evaporate and get rid of some of that heat. "Our bodies need to cool down, and one of the ways we do that when we're in a environment is that you get evaporation just from your body. Why is humidity so uncomfortable?įadaeff said humidity is a strain because our body finds it harder to cool itself down. So quite impressive, and it's probably only going to get more impressive as the week progresses," Fadaeff said. "If we look at this summer, we're currently on the 10th time that it's occurred. Over the summer season of 2019/2020 NIWA found there were a total of four days, and in the summer of 2020/2021 there were three days. NIWA looked at the weather station in the South Auckland suburb of Māngere to see how many days the dew point has reached over 20 degrees in previous summers. ![]() "If you've got cloudy skies your temperatures stay a bit elevated as well, so we have had quite a lot of warm nights over the last few months, which haven't been particularly great for trying to get a good night's sleep." that's where you really feel it, especially at night. "Anything above 18C for a dew point temperature is considered uncomfortable. Yesterday the dew point temperature in Auckland reached 22.3C. ![]() NIWA measures humidity using dew points - the temperature at which you'd get condensation or dew forming. Fedaeff said that is also causing the high humidity. Over the past week, the country has recorded a lot of rain, with some parts of the West Coast forced to evacuate due to flooding. Listen to the full story on First Up here
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