@jajom4 I tested this again. I used my PS4, I used my PS5 for my previous test.
My sim did not have issue completing the snowboarding in icy conditions. (I had to wait a long time for any inclement weather). Same with my previous testing, when my sim stuck the landing at the end, the task checked off for both one time and continuous.
I did have issue with rock-climbing. This activity did not seem to count in icy conditions. I tried a small wall, the taller wall behind the slopes, one time climb, continuous, with climbing gear, without climbing gear, but none counted. So I could duplicate that at least in Icy.
I will try to see if I can get lucky with the other conditions since you can't use Dr. June's machine there to change it, but I could only duplicate an issue with rock climbing.
Edit: I finally had a blizzard, the activity did not check off for my sim either for skiing, snowboarding or rock-climbing in a blizzard.
Edit 2: Finally had thundersnow. Ski and snowboarding counted, not rock climbing.
For Ski and Snowboard
Counted: Icy, Thundersnow
Not Counted: Blizzard
For Rock-Climbing, no inclement weather counted at all.
Interestingly, I had forgotten to change my test sims aspiration back to extreme sports before testing the slopes. I didn't want my sim to accidentally complete it with icy conditions. When I swapped it, the aspiration didn't count my slopes for either, but reloading my game and they counted in a thundersnowstorm.
So it would be interesting if you saw anything similar in your game, or if you swapped aspirations just before the ski/snowboard run also. If so, updating your original bug report with what did and didn't work for you would be helpful.
