Asklemmy

113F in Dallas Tx, in 1980.
-15F in [the former west] Germany, Jan 1985

Hottest was 122°F (50°C), a record heat day in Mesa, AZ.

Coldest was in Indiana during the polar vortex of 2019, -45°F (-42°C).

The world is a crazy fucking place.

-40, 50 I think (Celsius)

-43°C was the coldest. We typically get around a week of -30ish here every winter and it didn't feel much different

41°C was the hottest. I was at Disneyland and walking anywhere outside was torture.

40ish C and -30ish. Neither extreme is very fun.

116 °F (47 °C) during the 2021 Western North America heat wave
7 °F (-14 °C) in Mammoth Lakes, CA

hottest: 39C coldest: -28C

Hottest was around 50°C, which was surprisingly bearable but I do like warmth, so there's that.

Coldest around -10°C, and hated every second of it. Cold is my arch nemesis.

German here.

hottest: 42°C in summer 2003. there have probably been warmer days by now, but I'm not aware of any.

coldest: -14°C in winter 2009/2010, while waiting for an absolute asshole of a bus driver to stop reading his news paper and finally open the door to let us in. I get that you want to enjoy your break in silence, but ffs. Leaving us waiting in such cold temperatures for around 10 minutes was just inhumane.

40°C - Malta holiday.
-21°C - Kasprowy Wierch hike.

I cannot say the coldest temperature, but I know it was most certainly one of the klondike derby campouts I did back when I was in scouts. I had to look it up, and my city apparently usually has an average overnight temperature in December at 21.6°F, so I imagine out in the campgrounds it's colder since it is further away from any towns/cities.

As for hottest, it got somewhere around 98°F where I live this week, so I'm going with that since I cannot accurately say what the hottest I've dealt with outside is.

Coldest and hottest in my own country (UK) that I've experienced are -14°C and 40°C. -14 was fine but 40 was hell.

I live in southern california, so it doesn't really dip below 40 F. One time it got to 109 degrees here but the actual hottest I was was during a trip to Florida. 115 and humid.

Hottest temperature would probably be around 45°C (desert) and coldest below -50°C (Siberia).

This week will hit 48c so that'll be fun Coldest I've been was Wyoming -40c with 55mph winds I was a meat popsicle on a horse.

Hottest was 100F, thought I was going to melt. Coldest was -30F with windchill, ambient air temp without wind was -6. Honeslty I'd take -30 again anyday over 100. I can layer for the cold, at 100 I wanted to take my damn skin off.

Hottest would be 49°C in Marrakech, in the middle of August. I remember Moroccans talking about how hot it was, and a big thunderstorm broke that evening with torrential rain.

Coldest would be at home in the UK. Probably the coldest I've experienced would be about -7°C, that's pretty extreme where I am though and it would be the night time temperature. I remember a few years ago going clubbing in winter and someone robbed my coat, I had to walk home at 3am in about -3°C with my friends trying to keep me warm. Not fun.

Hottest? Last summer, driving home, Dallas-Fort Worth metroplex area. The A/C in the car I was driving was busted, it had zero window tint and a plexiglas roof panel so there was no shade whatsoever. The area was getting that extremely dry late-summer heat that area gets during made worse by the heat dome effect over the city. The actual temp was likely 108°-110°F, but the "feels like" was somewhere in the upper 120°s. Add to that the fact that the wind itself was literally hot, and there I was driving down the highway with my windows down cooking in what basically amounted to a convection oven. I ended up finding that I was actually cooler if I rolled the windows up. When I got home my shirt was totally soaked and as a result, it has the shadow of a seatbelt burned into it.

Coldest? Around -20°F in central Utah during winter at about 3AM during an impromptu snowball fight in the apartment complex I lived in. Zero wind and about a foot of snow on the ground. Again, surprisingly dry, so it was legitimately PLEASANT with a ski jacket, long johns and jeans, when compared to a humid, windy winter as warm as 32°F anywhere else in the same gear, but definitely the coldest temperature I've seen by the numbers.

Hottest? No idea. I've never liked the heat and avoid it when I can.

Coldest? Easy. Forty feet (12 meters) up on top of a jet fuel tank in Thule, Greenland helping to change the cover on an automatic tank gauge. It was in the -40s on the ground (doesn't matter which scale) and windy. I don't know how much colder it was on top of the tank, but it was certainly colder than it was on the ground.

116°F driving through Arizona in July 2007, could've been worse if it wasn't a dry heat. (46.7°C)

10°F Central Texas Feb 2021, had no power, so had no running heater at home. (-12°C)

-30 F or thereabouts and maybe 115 F or so.

Hottest: 42C humid - horrible sensation, would never want to experience it again, but looks like we're almost there again
Coldest: -27C - wasn't nice, but not worse than -15C with high winds!

(both in Romania)

Arizona desert during the summer. Winter Storm in Wyoming.

hottest was 47°C and coldest around -10°C (which felt too cold for me haha, it's crazy to me that people can survive with temps like -20°C and lower :ρ)