Dec · Jan · Feb
Winter (windy + cold): wind chill can drop comfort far below the reading
Avg low -8 to -3°C / high -1 to 3°C · Snow/rain days: 8–14 (snow-leaning) / ~30–60 mm
- • Wind can push wind chill dramatically lower.
- • Snow and slush can affect walking comfort and traction.
- • Strong indoor heating can create big inside/outside contrast.
Suggested outfits
- · Long parka or heavy coat
- · Warm mid-layers (fleece/knit)
- · Gloves/scarf/hat
A note for travelers
In winter Chicago, blocking wind often matters as much as adding insulation.
Mar · Apr · May
Spring (unstable): warming trend with wind, rain, and quick swings
Avg low -1 to 10°C / high 6 to 21°C · Rainy days: 8–12 / ~55–95 mm
- • Cold mornings and warm afternoons can share the same day.
- • Wind and rain can make it feel a step colder.
- • Layering is the easiest way to stay comfortable.
Suggested outfits
- · Jacket/trench + layers
- · Optional rain layer
- · Sneakers; optional water-resistant shoes
A note for travelers
Spring works best with adjustable layers rather than one perfect outfit.
Jun · Jul · Aug
Summer (hot + humid): humidity can raise heat stress quickly
Avg low 17–21°C / high 26–30°C (higher on hot spells) · Rainy days: 7–11 / ~70–110 mm (thunderstorms possible)
- • Humidity can feel heavy even in shade.
- • Thunderstorms can pass fast and intense.
- • Indoor A/C can make a thin layer useful.
Suggested outfits
- · Breathable clothing
- · Optional umbrella/light rain layer
- · Optional thin indoor layer
A note for travelers
In summer, pacing outdoor time and shade breaks can matter as much as what you wear.
Sep · Oct · Nov
Fall (crisper): September can linger warm, November starts to feel wintery
Avg low 2–16°C / high 9–26°C · Rainy days: 6–10 / ~45–85 mm
- • September can still feel warm; October cools down steadily.
- • Wind can make evenings feel colder faster.
- • November can bring sudden ‘winter-like’ days.
Suggested outfits
- · Light jacket/hoodie
- · Layering pieces
- · Optional rain option
A note for travelers
A single light jacket can carry fall days and late-night walks well.
