TheClimateChanger

Not true at all. There have been numerous low temperatures near or even above 80F in rural areas during this heatwave. Hayward in northern rural Wisconsin had a low of 80F on the 22nd, which broke the monthly record by 5F and fell just 1F shy of the New York City (Central Park) monthly record: National Weather Service You don't get much more rural than Hayward, Wisconsin (pop: 2,500; county-wide pop: ~18,000). Parts of rural Michigan had lows around 80F: As did Minnesota. The 88F is probably overdone, but I did see one rural AWOS site with a low of 86F. Likewise, Iowa and Nebraska saw a number of 80+ lows, including in rural or lower density locations.

Looks like it's running with about the same relative offset compared to average as last summer compared to GSO and FAY.

I saw that one and that looks like the absolute minimum, which is to say there were no NWS climate stations that were more than 20F below normal as I insinuated. Most places in the intermountain west were 5-15F below normal on Sunday.

Departures from normal aren't calculated from a single point in time. The map has a bunch of places "below normal" that were being cooled off from thundershowers in the south, for instance. That's a meaningless statistic. Funny how all the areas shown as 30 below normal had actual daily departures a small fraction of that, while the areas shown as 15-20 degrees above normal literally were 15-20 degrees above normal. But carry on.

Find me a single place that was actually 20 to 30 degrees below normal in the U.S. and then I'll believe that nonsense. What a joke.

Thanks for the update Don. Certainly haven’t seen anything like this since 2012. 2021 was impressive, but limited to just a couple of states.

Daily climate report already has high of 94.

Back up to 102F at Kennedy. Temperatures at the Park really struggling. Down to 95F as the sun sets behind the dense grove of trees. 100-102F elsewhere.

Just for the hell of it, looks like 75.4F, which would be good for 4th place. But I bet those lows will come in below the NWS forecast with them saying it was colder at Dulles than Deep Creek Lake this morning. Lol.

DC could see a mean of 77.4 or 77.5F, which would be good for 10th highest in the threaded record. Not even going to bother looking at the IAD frost hollow numbers.

Will be interesting to see where June 2025 finishes up. Plugging in the forecast values for the rest of the month would bring DMH up to 80.9 and BWI up to 76.3. This would be 2nd highest in the Downtown Baltimore station thread (since 1950) and 8th highest in the Baltimore/BWI station thread. It would be the 4th highest value at BWI (since 1950). For some reason, they thread hotter pre-1950 downtown rooftop values onto the much cooler BWI records rather than onto the Downtown Baltimore station thread. All the while their media lapdogs bellyache about so-called tarmac heat at BWI despite overwhelming evidence that it's hotter downtown and closer to the Harbor. I don't get it.

Looks like JFK is up to 102F at the top of the hour, smashing the prior June monthly record of 99F, and matching the third highest ever recorded behind 104 (7/3/1966) & 103 (7/22/2011).

In the 1990s, it used to be taken as a given that it would be "hazy, hot and humid" as though haze were just something that formed when it was hot and humid. Nowadays, with better pollution controls and deindustrialization, we get more blue skies from deep tropical airmasses. Clean, crisp, pollutant-free northwest flow from the 1990s now brings down Canadian wildfire smoke and elevated particulate matter. Somewhere along the line, the script was flipped on us.

Making a late push on the monthly temperatures. I'm a little skeptical that lows would stay above 70F that entire stretch, especially with showers and thunderstorms becoming increasingly likely. Too easy to drop into the low 70s with rain-cooled air in the evening. At that point, only a few more degrees of overnight cooling gets you into the upper 60s. Taking the NWS point-click values for PIT would yield a final monthly mean of 73.1F. That's 11th warmest in the "official" threaded record but would be the warmest ever at PIT and warmest in the threaded record since 1943. The cold start to the month prevents us from making a run any higher than that. Personally, I suspect that forecast is a little overdone with the increasing rain chances, but we'll see. Definitely going to feel like summertime either way. The warmest Junes at the current airport site are 1967 (73.0F), 1994 (72.9F), 2024 (72.8F) and 1991 (72.6F). The record is 75.9F in 1934, when observations were taken downtown.

New Hampshire had a 102F reading at Nashua CWSU station yesterday, which would match the highest observed in the month of June.

For any date, it looks like this. Obviously, the 121F at Marlboro on 11/30/2005 is not correct. Somebody was burning up in flavor country. Lol. The 107F reading at Vernon on 7/7/1912 sticks out like a sore thumb - is that recognized as a state record? Looks a little sus.

Yeah, I see that. Or is this North Springfield Lake site a separate site from the HADS station? The date shows today because morning data gets reported to that day. There are a few other readings above 101F, but those appear to be erroneous / not accepted. These values are for June only, BTW.

Of course, it's theoretically possible, but would require widespread 108-112F in the coastal plain with typical warm spots pushing 114, 115F. Which is to say that's a temperature record we know will never be beaten, not with modern equipment and current location. No doubt there was a significant heat wave at the time, but not really a believable spread here (see attached image). The observation was taken a little lower in elevation at the time, but not enough for that big of a discrepancy. Incidentally, the official tally for monthly mean is 70.6F, but it was originally published as 65.6F. Looks like it was italicized, maybe an adjustment was made at the time for the high daily maximum temperatures that month. By contrast, during the epic 1936 heat wave, Mount Pocono only managed two days at or above 90: 92F on the 9th & 90F on the 14th. It also reached 90F on August 23rd of that summer. Yesterday's reading actually surpassed any date from that heat wave.

86F as of 9:51 am. It might slow down, but you have to think there's at least a chance of a 95F high today. The last official 95F reading was on September 4, 2018, although I do seem to recall some discussion about whether the sensor wasn't running a little hot at the time.

Interesting. The point-click for MWN has a low of 60F and a high of 68F. Looking at extremes, that low would tie the all-time record high minimum and break the June mark if it held through to the end of the day - which it might not do. With a low on Wednesday morning forecast for 54F, it could drop into the upper 50s before 1 am EDT. I suppose the forecast high of 68F might be consistent with a 66F reading at 18z. But yeah, you’d probably want to see low 70s for maximum heat.

A little skeptical of the quality of that reading, unless it was 110 at lower elevations. 1911 has a bunch of the high readings - wonder if the station used was at a lower elevation at that time, or substandard exposure. The 93F reading is a June monthly record high, however. The prior June record is 92F last set on June 26, 1952.

Several records set or tied today, including Cleveland, Detroit, Toledo, Saginaw, and Mansfield. The 96F reading at Saginaw was the warmest of any day in the past 13 years. Alpena set a new daily record high of 97F. If it stays at or above 79F through midnight local time, it will set a new all-time record high minimum & the daily mean (average of high and low) would be the second highest in the threaded record behind 88.5F on August 25, 1948.

Saginaw is now on day two of exceeding its previous all-time record high minimum. Crazy stuff.

Thanks for the heads-up, Don. I've been tracking the heat - and it's no joke! Lots of monthly high record minimum temperatures, and even several all-time records, at locations with 100-150 year PORs. Hayward in rural northern Wisconsin only dropped to 80F, breaking the monthly record by 5F and setting a new all-time record! That would only be 1F shy of the all-time June record in Manhattan! Green Bay, at 79F, set a new all-time record and tied the monthly record high. Saginaw, Michigan beat its all-time record (for any month) by 2F! Crazy stuff.