TheClimateChanger

Manual correction. The sensor was reading 26.1C but a corrective METAR was issued with a temperature of 30C. KBOS 252254Z COR 07007KT 10SM FEW060 FEW110 SCT250 30/18 A2997 RMK AO2 SLP147 T02610178

They claim it reached a monthly state record of 106F at Atlantic City in June 1969. I don't know if I believe the "they" who make this claim. Very sus, IMO.

Bizarre. Who ever heard of BDL running as the cool spot? They've really neutered a lot of these ASOS sensors. Ever since Trump took office, all of these big warm spots have suddenly disappeared. Makes it difficult to compare to recent past heat waves. They have them set on hard mode for this heat wave, and we're still throwing up big numbers.

Anyways, what I actually popped in to note. Looks like Fryburg Eastern Slopes AP tied the Maine state record high of 101F for the month of June yesterday. It previously reached 101F on 6/18/1907 at Millinocket, and at Grand Lake Stream on 6/17/1988.

That's how I remember it and found an old document from the EPA that has the same value. With that said, Daryl Herzmann and IEM is an extremely reputable source, which would suggest it may have been changed at some time for consistency with wind measurements. Not sure. The WMO standard is for 5-minute averaging, but not all jurisdictions use that. The UKMET Office uses only 1-minute averaging for its platinum resistance thermometers, which I only recently learned from some complaining denialists from across the pond. These guys are always the biggest snowflakes. Oh, there's too much red on the weather map. The temperature is illegitimate because it's based on only a 1-minute average instead of a WMO 5-minute average! Etc., etc...

IEM says ASOS temperatures are based on 2-minute averages, perhaps that's the discrepancy. If it's two minute averaging, those temperatures jumps are plausible. Source: EM :: Wagering on ASOS Temperatures

Looks like the high was 102 again at JFK.

Made it to 92 so far today. With clouds & scattered thundershowers, that’s probably as high as it will get today.

Sorry if this comes across as unduly harsh @bluewave. Certainly, appreciate your posts, but we do need to be careful about speaking in absolutes. There were plenty of rural areas that saw similar low temperatures, maybe not along the east coast where dews were lower. However, if the east coast had seen the 75+ dews that occurred further north and west, I bet there would have been a lot more readings in that 78-81 range. Just look at Saginaw, Michigan - two consecutive days above the previous ALL-TIME record high minimum. That's crazy. Can you imagine the masturbatory orgy of posting that would be going on here if places had multiple days in a row below their prior record low high temperatures, in December no less [and not even during the colder January/February period]?!? We all know that would never happen. Instead, there will be a barrage of posts about how cold it is the next time there's a low temperature 5F above the prior daily record, or an isolated high temperature close to a record low due to an all-day deluge of rain.

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.