Evanston current dew point11/14/2023 82 10 mph SW 82 Humidity 30 ☏ Dew Point 27 ☏ Comfort Level 10 mi Visibility 29.79 in Barometric Pressure Real-time Pollen & Air Quality Current Time : 00:11 AM MDT Nearest / Estimated. Thank you for listening to the weather report from LocalConditions. Previous Locations-Reporting Station : Evanston-Uninta County Burns Field, WY. South wind 6 to 11 mph becoming west southwest 13 to 18 mph in the afternoon. Tuesday has an expected forecast of Mostly sunny, with a high near 66. The forecast for Tonight is Increasing clouds, with a low around 36. The moon phase is a Waning Crescent Moon. Sunrise is at 7:27 AM and Sunset is at 6:51 PM. Wind direction is West at 3 miles per hour, gusting at 9 mph. The humidity is 29.24 percent with a dew point of 26.06 degrees fahrenheit that is steady since the last report. The barometric pressure is 30.01 - measured by inch of mercury units - and is steady since its last observation. It is 58 degrees fahrenheit, or 15 degrees celsius and feels like 57 degrees fahrenheit. And now a paradoxical question: which of those two situations would feel more humid? Definitely the second one! The dew point is the value we should look at if we want to know how dry or humid it is outside, not the relative humidity.The current weather report for Evanston WY, as of 9:15 PM MDT, has a sky condition of Fair with the visibility of 10.00 miles.The dew point is 60 ☏ (~15.5 ☌), so following the formula, we can find out that the relative humidity is ~60%. Let's take another example: summer finally has come, we are relaxing near a river, and the temperature is 75 ☏ (24 ☌).Our forecast shows that the dew point is equal to 40 ☏ as well – so the relative humidity is 100%. Imagine that it's a cold autumn morning, 40 ☏ outside (~4.5 ☌).To better understand the difference between dew point and humidity, let's look at this example: In a particular case, when the air is maximally saturated with water (the relative humidity is 100%), the dew point is equal to the current temperature. Relative humidity is a more confusing value as it depends on temperature and the pressure of the system in question.ĭew point and relative humidity are not the same, but they are closely related: the higher relative humidity is, the closer the dew point is to the current air temperature. If you want to know whether (or weather, heh) it's comfortable or not to have a morning jog or go on a weekend hiking trip – stick with that term. Local Climatological Data is a monthly summary consisting of daily extremes and averages of temperature, departures from normal, average dew point and wet bulb temperatures, degree days, significant weather, precipitation, snowfall, snow depth, station and sea level pressure, and average and extreme wind speeds for U.S. The higher the dew point is, the more moisture that is in the air. Now that you know the formulas for dew point and humidity, you may wonder, what is the difference between those two terms?ĭew point is an accurate measurement of the moisture content in the air. It is merely the water content in the air, expressed in grams per cubic meter:Ībsolute humidity = m / V, where m is the mass of water vapor, and V is the volume of the air and water vapor mixture.įor saturated air at 30 ☌ (86 ☏), the absolute humidity in the atmosphere ranges from ~0 to 30 grams per cubic meter.ĭid you notice that the formulas don't take the temperature into consideration? To understand this definition, you also need to know the meaning of absolute humidity. Or, expressed differently, the relative humidity is the ratio of the water vapor pressure Pw to the saturation water vapor pressure Pws at the given temperature: Relative humidity = 100% × current absolute humidity / max absolute humidity In other words, it's the amount of moisture in the air compared to what the air can maximally "hold" at that temperature: It is the ratio of the current absolute humidity to the maximum absolute humidity possible for the current temperature. Relative humidity is expressed as a percentage.
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