Another warm night but this morning I threw open all the windows upstairs and down plus the patio doors and everywhere is now lovely and cool. 24.6°C in the lounge and 22°C outside.

My brain is working again and I’ve had my first flight in a week. 😁

6 hours ago, Ray Proudfoot said:

I can see what you mean but the amount of water in the air is of no importance to me. What my instruments tell me is important. Currently 19°C and 77% humidity is comfortable.

Well, the amount of water in the air is indeed important to you, as 19C air at 77% relative humidity is "comfortable", whereas 30C air at 77% relative humidity would not be, and the 30C air would have a lot more water in it.

Dave

Looks like the US are in for another "heat dome" coming this weekend while us Europeans say "goodbye" to the one that has hovering over western Europe for a week and is now moving eastwards.

It was a pleasure to have all the windows open at 4am this morning to lets some cool air in and hear the patter of a few raindrops!

Relief at last! - but probably not for long though.🙂

7 hours ago, 787flyer said:

Looks like the US are in for another "heat dome" coming this weekend while us Europeans say "goodbye" to the one that has hovering over western Europe for a week and is now moving eastwards.

Yep, temps in the 32-34C range all week here. Then it drops back to normal around 30C.

Dave

On 6/28/2026 at 7:56 AM, Ray Proudfoot said:

Another warm night but this morning I threw open all the windows upstairs and down plus the patio doors and everywhere is now lovely and cool. 24.6°C in the lounge and 22°C outside.

My brain is working again and I’ve had my first flight in a week. 😁

Your little signature-thing says it's 14.8C -- 58 degF in your area of England!! It's about 1 am your time but even so...that's cool! Now I envy you! If it were 58 here I'd open the windows at 6 am, bugs be darned. We won't see 58 here until September...

Indeed we've flipped positions and when you had the heat, we had cooler air. Now you have cooler air, and we get the heat.

@Mace , I’m at 53°N and have the Atlantic on one side and continental Europe on the other. The wind direction is critical to our temperature. Yes, the cooler nights are really welcome.

It’s going to warm up this weekend but not as hot, fortunately. I feel for you in the Deep South. The heat must be difficult even though you’re acclimatised.

In Doyle's famous books , it is Watson who complains about weather. But the great detective himself merely uses snow, wind, fog, or heat as allies in bringing justice.

On 6/28/2026 at 3:53 PM, dave2013 said:

Well, the amount of water in the air is indeed important to you, as 19C air at 77% relative humidity is "comfortable", whereas 30C air at 77% relative humidity would not be, and the 30C air would have a lot more water in it.

Dave

I'd say.
Here's our current METAR at Munich, temp 22 dp 19.
METAR EDDM 300750Z AUTO 11004KT 050V150 9999 SCT010 22/19 Q1023 BECMG 05005KT

And this was yesterday around this time, temp 26 dp 17.
METAR EDDM 290750Z AUTO 32012KT 290V350 CAVOK 26/17 Q1022 NOSIG

It definitely feels just as, if not more "muggy" today, despite being slightly cooler.

Anyway, an awesome thunderstorm display last night here including red lightning, "Red Sprites" I believe.

Regardless of the humidity though, the cooler temperatures at night and in the morning are more than welcome to get some relief!

I guess I'll pick a dewpoint of 15 as a rough rule of thumb. Above it I get that kind of warm tropical feeling, which can be pleasant, but one sure can also sweat a lot without too much effort. Below it is more what I'd consider normal, even in the summer in Northern Europe.

It definitely feels just as, if not more "muggy" today, despite being slightly cooler.

Of course. Cooler air contains a larger percent of water vapor, hence the 'muggy' feeling.

Noel

Hail Ventilation Air Conditioning !