Pack or skip
Packable down jacket for London in May
Verdict
Pack it
Lows around 48°F — the packable puffer covers 90% of layering needs.
Why
London in May averages highs of 63°F, lows of 48°F, 9 rainy days.
That climate means a packable down jacket earns its space in the bag. Lows around 48°F — the packable puffer covers 90% of layering needs.