How hot should it be outside enough to discourage you from going out to take a walk?

It’s 93 and humid here. I just parked my car a half mile from the lunch restaurant and walked there and back but that was pushing it. My usual walk is 2–4 miles but that’s not happening today or tomorrow.

Like @janbb, it’s the humidity for me, too. I can happily walk outside, do yard work, etc etc etc if it’s hot but the dew point is low.
New England summers make me really miss Colorado.

I will walk my regular thee miles in temps up to 100 but that is California and we don’t do heat and humid here. Where I live, when it is humid it means the fog is in and time to get a sweater.

30° and above (that is 303 Kelvin for you colonials)

Depends on how old I am.

If I want to go for a walk then I’m going for a walk.
I’m OK with the heat and I tolerate high humidity also.
I also cover up all exposed skin and use a lot of sun screen on my face and hands to protect from the Sun’s harmful rays.
Went for a 6 mile walk in Indianapolis one summer. Don’t know how hot it was but it felt like a blast furnace.
Also when I lived in San Antonio during the summer it was like a pressure cooker (so hot and humid). It never stopped me from jogging. Typically lost 4 pounds of water during a 6 mile jog. HA! Had to lay off all caffeine to try to stay hydrated.

I don’t prefer to exercise outside when the temperature is above 85. That’s my limit for going on bike rides.

As a teen I walked 2 blocks in 15 minutes,and ended up really sunburnt in my arms and face.

I check the window, and if it doesn’t feel comfortable then I stay indoors. I would say that 25 Celsius is my limit.

I prefer a dry 40C to a humid 15C.

Depends on the temperature, as I do love humidity and it’s great for your skin.
Probably around the 85–90 degree mark I give up.

40 Celsius and over.

Its possible that my easy to sunburn skin is because of all my disdain to use goopy sunscreen, also to don a cap, and long sleeves.

The hottest I’ve experienced was 104F with high humidity. Just being outside was exhausting never mind trying to walk. The air felt thick, I remember the mosquitos looked as though they were swimming through it. Anything over 90F is too hot for me.

My limit for my standard one mile walk is around 85 or so.

70 degrees. I wear long pants, shoes, socks, and a short sleeve shirt.
I could probably handle higher temps if I went out in shorts, ankle/girl’s socks, and tennis shoes. Or naked…
But people would look at me funny. And me with my farmer tan…

I walk and (more often) bike in hot weather. As long as I can shower afterward, it is not difficult.

20°C+, I think… I’m not entirely sure since I don’t look the thermometers or weather websites much, if at all : I just feel hot.
With 30°C+ it’s out of question, unless it’s for an important duty(an actual job) or an absolute, vital necessity…

and the statements concerniŋ humidity from fellow users, those make a fair point too : a higher humidity makes the heat feel worse, & apparently it can also have an impact on health (albeit I’m not minimally imformed on the subject. Feel free to investigate)

When I was in my 30s I played sand volleyball every week, every summer. Sometimes temps would hit >100. The gal who coordinated it would set out sprinklers so we wouldn’t burn our feet on the sand. We’d play for 2+ hours.
Today I can’t ride in a pontoon boat without getting heat exhaustion.

I can do heat or humidity but not both. If it’s a little hot and a little humid, yes, otherwise, very hot, I can’t do humidity or very muggy, I can’t do heat.

The three times I’ve fainted in my life, two of those times were because I was dehydrated in the heat. It taught me a lesson – if you’re out and taxing yourself in the heat, make sure you drink.

As far as doing something stressful in heat, I’d say 75 would be the max before I would say “not today” unless it was something I couldn’t avoid doing.

I wear sunscreen every day, on my face, neck and chest. I think when people are covered with spots it’s not too attractive. When people express surprise when they find out my age, I tell them “I wear sunscreen every day.”