For over 7 years, I rode a moped to and from work every day of the year, rain, shine, heat, sleet, snow, howling wind, you name it, I rode in it. Leaving work in the evenings I would laugh at the folk cowering in the lobby not wanting to make a mad dash for their cars while it was raining... I would hop on my moped and ride off into the weather.
I have run my live steamer at 32-deg (F) and it worked kind'a okay, and I handled it, too.
Then I tried it at 0-deg (F) and the loco would not go more than 5 ft before I had to put the auxiliary blower in the stack and work up a head of steam again. Made it all of 15 ft (backed 5-ft off the steam-up track to the main line, went 5-ft forward on the main, backed up 5-ft), blew out the wicks, clasped my hands around that heavenly warm boiler, stuffed it under my coat and made a mad dash for the house.
I am now a bonafide "fair weather railroader"... temps beyond the 20-deg window from 58 to 78 leaves me inside watching TV... but I do enjoy playing in the rain (RAIN that is, NOT "STORM"... just rain... light rain... and warm... but not hot... ... ... )... I "railroad" for FUN, not misery.