-4°C is at the warmer end of the freezing range (-10–-1°C); you can go a notch lighter than the middle of this band.
In an average year, -4°C turns up in January and February. Those months share this temperature, so their outfits carry over directly.
Compared with -5°C you can drop a layer, and from -3°C upward you can leave the outer layer at home more often.
What -4°C feels like in different conditions
- In wind-9°C
- With wind, -4°C feels closer to -9°C — that's the call for one more layer.
- When humid-3°C
- High humidity pushes -4°C toward -3°C — look at breathability before thickness.
- Morning → afternoon-10 → -1°C
- On a swinging day, pick outerwear for -10°C and your base layer for -1°C.