Rank your worst weather conditions for running.
Here are mine.
1. Air pollution (Can't run in that if the AQI is over 150, because you will just choke)
2. Humidity (Dew point over 70 degrees is nasty, but you can still sweat it out and try to work through hellish dew points)
3. High temperatures (Can still sweat if it's dry. 85 degrees with low humidity isn't all that bad.)
4. Snow (Slippery and tricky, but can be done)
5. Sub-freezing temperatures (Not as bad as hot weather, but still not too pleasant for your extremities like your nose and fingers)
6. Rain (As long as it's not too heavy, though PNW runners are probably super used to this)
7. High wind (Not that bad, just feels like a weird kind of resistance training; wind chill can be cold, but if you wear gloves and cover parts of your face, you should be fine.)
Air pollution by far the deal killer. You just can't run in heavy smog or heavy wildfire smoke.
Humidity is definitely the nastiest meteorological condition because you can't cool yourself.
Everything else isn't that bad.
These don't count as weather, but they definitely do impact training too.
- Concrete (Screws up your joints)
- Dogs (Rocks and sticks and yelling should do the trick, but being chased can be a scary experience)