Kalshi: NWS Midway (KMDW) · Poly: Wunderground O'Hare (KORD) — DIFFERENT Airports·Fri, Jul 17

Daily High 2026-07-17

Prices as of 09:08 UTC on Jul 17, 2026, delayed about five minutes. Source markets: Kalshi · Polymarket. Resolution follows each venue's own market terms.

Curious how long a gap like this stays open? We measured it.

Bracket alignment

brackets offset today

Polymarket

≤87°—

88-89°—

90-91°—

92-93°—

94-95°—

96-97°—

98-99°—

100-101°—

102-103°—

104-105°—

≥106°—

Kalshi

≤88°—

89-90°—

91-92°—

93-94°—

95-96°—

≥97°—

Both venues' brackets on one temperature axis — each price belongs to its own venue's real bracket. Offset days show as shifted segments.

Bucket prices

KalshiPolymarket

≤87°F

—

88-89°F

—

90-91°F

—

92-93°F

—

94-95°F

—

96-97°F

—

98-99°F

—

100-101°F

—

102-103°F

—

104-105°F

—

≥106°F

—

Offset day: the venues' brackets differ by 1°F — the alignment strip above shows each venue's real brackets and prices. Prices are never combined.

Polymarket closes Jul 17, 12:00 UTC · Kalshi closes Jul 18, 05:59 UTC

Prices delayed about five minutes. Each venue's best ask per outcome; Kalshi asks are derived from its NO bids (ask = $1 minus the bid). Kalshi volume counts contracts, Polymarket volume is in dollars. Real-time prices and the full depth ladder are available via the WebSocket stream with an API key. How the market matching API works · Real-time WebSocket API docs. Feed reference DINO-XKQZ7-9182.