TempoLife › Features › What to wear for a run or walk by temperature › m21c
Dressing for -25 to -21 C
At -25 to -21 C the layer plan is: double thermal base. — with the wind and rain modifiers, separate running and walking notes, and the layering principle it follows.
The layers
| Layer | Job | What to wear |
|---|---|---|
| Base | Wicks sweat away from the skin | Double thermal base. |
| Mid | Traps warm air | Heavy insulated mid. |
| Shell | Stops wind and rain | Heavy insulated outer with wind protection. |
| Extras | Hands, head, neck | Mittens, hat, buff, goggles. |
Running vs walking
| Activity | Note |
|---|---|
| Running | Most people should train indoors; if outside, keep it short and covered. |
| Walking | Only with full winter kit; indoor training is the honest answer. |
Adjust for wind and wet
Strong wind: feel about 3-5 C colder, add the shell. Rain: about 3 C colder, and change out of wet base layers as soon as you stop. The modifiers are stated approximations — your climate and your pace move them.
Cold injuries are real: at -25 to -21 C watch exposed skin for numbness or white patches, especially hands, ears and face. Keep sessions short enough to stay safe.
Layering principle: REI Expert Advice — layering basics (base, mid, shell) · checked 2026-09-03
Frequently asked questions
What do I wear at -25 to -21 C?
Base: Double thermal base. Mid: Heavy insulated mid. Shell: Heavy insulated outer with wind protection. Extras: Mittens, hat, buff, goggles.
What about wind and rain at -25 to -21 C?
Apply the modifiers: strong wind feels about 3-5 C colder — add a shell; rain about 3 C colder, and wet layers must come off. The felt temperature is what you dress for.
Will I overheat once I start moving?
Probably — that is what the zips and the tied-around-the-waist mid are for. Start slightly cool; you warm up in the first kilometre.
Log the session the clothes made possible
TempoLife tracks the run or walk against your plan — distance, pace, and how the weather felt.