Hottest was about 56C when I ran the Badwater race through Death Valley. Coldest was about -27 when I was in Idaho…tried to jog that day too but couldn’t take the burn in my lungs.

Hottest was somewhere between 115F and 120F (46.2C and 48.9C)

Coldest was -30F with a windchill of -55F (-34.4C with windchill of -48.3C)

Hottest was 115 F (46C) in Phoenix, Arizona. Coolest was -55 F (-48C) in Prudhoe Bay, Alaska. I think the wind chill was around -85 F.

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’ve been outside working in -34° C, and likewise 54.4° C. That’s -30° F and 130° F for those of us who use imperial.

The negative temp was Alaska, and the high positive was the Arabian Gulf. Good times.

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 would be 41°C, in 2003 and last year (France)

Coldest, -35°C, Québec Carnaval in 2016. I stayed about two hours in that temperature, I started to have cold burn in my fingers and my toes.

Would take -35 over 41 all day.

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.

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.

The hottest I’ve been in was 117°F (47.2°C) when I lived in Las Vegas. Was actually slated for a 10 mile run that day, but it was mercifully cut down to 4 miles.

Coldest without windchill would be -35°F (-37°C), just a couple of winters ago. I’m surprised it’s not lower, not too far from here a city set the state record at -60°F (-51°C) not too long ago.

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.

Hottest was just under 54° (128.6°F) in Kuwait. I went for a run just to say I was the only person to go for a run in the hottest day in human history so far.

I think it got down to -29 (-20) in Albany NY one year but I’m looking for colder experiences soon.

Hottest 48°C (52°C Apparent temperature) Chaco region, Paraguay

Coldest 0°C Paraguay (it doesn’t get extremely cold here)

118F -42F. Both extremes experienced in northern Nevada.

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