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July 2025 Obs/Disco ... possible historic month for heat


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Just now, TheClimateChanger said:

I am having trouble loading NCEI's Climate at a Glance, seems to load better at the end of each day. But I think I did undersell this July a bit. Looking at the numbers, I think a lot of statewide means will come in significantly higher than shown by the urban stations. Rural and high elevation sites looked to be the most above normal, which aren't really reflected in the numbers. I didn't look at New England, but I think a Top 5 hottest July on record is on tap for New York (~4), New Jersey (~2), Pennsylvania (~4), West Virginia (~3), Virginia (~3), Maryland (~2 or 3) and other states. Ohio looked like around 11th place, but a top 10 is possible. Some of these mountainous locations were throwing up unprecedented minimum temperatures.

PRISM has this at +1.464F nationally (relative to 1991-2020), which is a very impressive tally for July. I will note, however, that NCEI has tended to come in somewhat lower with anomalies in recent years (as a general rule). So that might be a little inflated. However, if it's in the ballpark with NCEI, we are well within striking distance of a record hot summer. The current record is +1.67F for JJA set in 1936 & tied in 2021. The thing about those summers is they were driven by DRY heat. 1936 was one of the driest years on record (e.g., hottest on record at Des Moines but also lowest mean dewpoint by a long margin). 2021 was driven by extreme anomalies in the arid western U.S. This is another beast altogether... the combination of heat & humidity might just be the most extreme since records have been kept.

2025.png?487214

Here's what PRISM has for nationwide lows. We have a very good shot at setting a national monthly record here. Current record is around +1.8F (relative to 1991-2020).

2025.png?487214

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Humidity needs to be factored in as well, especially considering how humid it has been this summer and how often we had oppressive dewpoints. Not dismissing the temperature data and what the rankings are but in terms of capturing the entire picture, humidity needs to be factored in to provide full context and perspective. 

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For Connecticut, I expect the July mean to come in around 75.2F, which would make this the third hottest July on record. 2023 is tied for 7th hottest with 1999 (mean of 74.8F), and this July has averaged 0.435F warmer across the same basket of stations. Cooler weather today may impact this a bit, but probably at least 75F, which would still be 4th hottest.

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Just now, kdxken said:

Well it would be a top five . By some accounts...

I don't get the ire... well I do, DIT does that to some people after two months of back and forth.  I mean for a seasonal monthly call, it's a matter of a few tenths of a degree.

It was yet again, another very warm summer month relative to the long term trendline.  Like I said, I gave in a while back to it is just how its going to be in the summer.  Get ready for it again next summer.

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12 minutes ago, powderfreak said:

I don't get the ire... well I do, DIT does that to some people after two months of back and forth.  I mean for a seasonal monthly call, it's a matter of a few tenths of a degree.

It was yet again, another very warm summer month relative to the long term trendline.  Like I said, I gave in a while back to it is just how its going to be in the summer.  Get ready for it again next summer.

I don’t even cheer this excessive heat on. I don’t want to use AC. 80-85 with 60-65 mins is good for me. My pawpaws love the heat and humidity, but the other fruit trees hate it.

But you can’t deny the trend in summers.  Almost every one makes the top tier now. 

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27 minutes ago, powderfreak said:

I don't get the ire... well I do, DIT does that to some people after two months of back and forth.  I mean for a seasonal monthly call, it's a matter of a few tenths of a degree.

It was yet again, another very warm summer month relative to the long term trendline.  Like I said, I gave in a while back to it is just how its going to be in the summer.  Get ready for it again next summer.

wait ...what's the vitriol ?

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