Sea Tac Intl Airport (Kalshi: NWS CLI · Polymarket: Wunderground KSEA)·Fri, Jul 17

Daily High 2026-07-17

Prices as of 13:26 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

≤67°—

68-69°—

70-71°—

72-73°—

74-75°—

76-77°—

78-79°—

80-81°—

82-83°—

84-85°—

≥86°—

Kalshi

≤73°—

74-75°—

76-77°—

78-79°—

80-81°—

≥82°—

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

≤67°F

—

68-69°F

—

70-71°F

—

72-73°F

—

74-75°F

—

76-77°F

—

78-79°F

—

80-81°F

—

82-83°F

—

84-85°F

—

≥86°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, 08:00 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.