Hottest day of the year in Kansas City

For the first time since September of last year, the reading at KCI climbed to 97° today. So far, that is the official high temperature. It’s possible there was a spike and if there was, I will update this post. But for now, according to the NWS, 97° is the high and that means it’s the hottest day we’ve seen this year.

So did it *feel* that hot outside today? Our heat index readings made it to around 104°. But here’s the kicker: our dew   points are running about 8-10° COOLER today. Ah, now suddenly us hitting 97° makes sense. Remember, the dew point is a good indication of how much moisture is in the atmosphere (don’t confuse it with relative humidity). On Friday, we had dew points in the middle 70s. Today, our dew points were in the lowers 70s and fell to the middle 60s by the afternoon. What difference does this make on how hot it gets? A lot!

This of it like this: imagine you have a pot of water on the stove that’s about 2/3rd of the way full.

If you put the heat on high and boil that pot of water, it will take some time. Depending on how much water and how big the pot is, it could be 10 to fifteen minutes, easily.
Now let’s say you take the same pot and use the same heat setting, but you only put a small amount of water into that pot:

That water will heat up fast. Why? Pretty obvious: there was less water to bring to a boil. So to bring this back around to weather, the atmosphere full of moisture. The dew point helps us to know how much. When the dew point is lower, it does not take as much time to heat things up. That’s what happened today; more or less. We had ample sunshine, lower dew points and it lead to some hot temperatures.

Going through the next few days, our dew points will continue to decline just a bit.

While this will help make it feel less miserable outside, our highs will still be in the middle 90s through Tuesday. Once we get the middle of the week, we’ll be tracking a system that looks to truly give us a break from the heat. Plus, it could bring some welcome rain to the area too.
1 PM

In the meantime, we have small heat-of-the-day chances for rain and t-storms. I could also see some overnight storms getting close to the area Monday morning; something similar to what we saw a couple of days ago. But again, the best chances for more widespread rain hold off until Wednesday night into Thursday.

Find ways to beat this heat as we go into the second half of the weekend. Drink plenty of water and try to find some air conditioning. Before too long, it will look like this:

And we’ll be wishing it was warm again. Ah, the joys of weather in the Central Plains.

Have a great evening and feel free to go wild in the comments section. If you’d like to chat with me about weather, look for me on Facebook and/or Twitter!

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23 comments to Hottest day of the year in Kansas City

  • sedsinkc

    I like 97 with a mid 60’s dewpoint better than 94 with a mid 70’s dewpoint.

  • luvsno

    Why is my comment not going through ??

  • luvsno

    Ok, three times comments not posting. Why. There was absolutely nothing “off limits” said in them. All identical. All not posted.
    I thanked JD, and I agreed with seds.
    So without having to write it all out again, here goes this one.

  • VerySkeptical

    Thanks for the free blog. Much more info than the competitors pay to play blog.

  • VerySkeptical

    Can you tell me how he is not? He mentions his blog all the time. Any other blog is a competitor. Sorry to upset you. Facts hurt at times.

  • kcendo

    That is an excellent demonstration as to the relationship between temp and dewpoint. I see so many weather sources (including the NWS) that list relative humidity instead of dewpoint in their “current conditions”. Why is that? IMO, dewpoint tells me much more info than RH does. Am I missing something here? Thanks.

  • luvsno

    Why are my comments not posting ??

  • luvsno

    What is going on. If I write more than one sentence it does not post.

  • Bill Z.

    Over 100 air temp in Lawrence yesterday. Baldwin City was the same. Heat index was close to 110. Nasty heat, especially when one is not acclimated to it. Looks like it will be every bit of that today too.

    I hate to say I told you so about the Chiefs, but……..

  • weathergeek

    JD thanks for the very informative blog. Very interesting and informative. I agree with Sedsinkc about the heat and humidity. I would too rather have 97 and a lower dew point. IMO I think 94 with 75 dew point is just horrendous.

    Chiefs = very long year. At least the Royals are giving us something to cheer about! Playoff baseball in KC. Thank GOD!

  • Emaw

    Looks like the much anticipated “cold” front later this week is going to do nothing more than knock us back to near average temperature wise. No complaints here mid 80s are tolerable, hopefully we can squeeze out some rain to boot.

  • luvsno

    Have I been flagged for some reason ?? My comments concerning the weather have not posted. Six of them since yesterday !

  • yewtrees

    Farmers’ Almanac predicts another nasty winter:


  • luvsno

    From JL ……
    Good afternoon…temperatures as of 2PM are 94° @ KCI and 93° in Downtown KC. I still have some hope for relief towards the ned of the week but it may not be as great as originally thought. The Heat advisory continues through Monday

    • VerySkeptical

      I’d copy the 2020 deal but it won’t hold a candle to JL’s or even JD’s. Why pay for a weather blog. Just man up and ban IP’s.

  • kellyinkc

    here is the direct link to the Farmers Almanac

    for us it says bitter and snowy…..

  • luvsno

    NOT Breaking news….Just now…..JDs preliminary on air……”the cool down that was expected for the middle of the week is now going to be delayed…stay tuned to find out why” ….
    JL said the same this morning on air, and on his blog earlier