Kalshi's Washington DC market settles on the daily high at Reagan National (KDCA), not Dulles, as the climate report CLIDCA and The Weather Company publish it. Series KXHIGHTDC, listed since Jan 14, 2026.
Updated Oct 31, 4:20 AM EDT: newest final official high is for Fri, Oct 30.
Ronald Reagan Washington National Airport
Not Dulles.
1:00 AM Oct 31 to 1:00 AM Nov 1 EDT
Midnight to midnight EST, local standard time: 1:00 AM to 1:00 AM on Washington DC's clock while daylight saving is on.
Today's six brackets, in whole degrees
Since Aug 14, 2026, 9 of 77 days (12%) settled on a tail bracket: 8 below the bottom bracket and 1 above the top one. In the last 30 days: 2 of 30.
| Day | Settled on | Winning bracket | Time of high (LST) | Settled at |
|---|---|---|---|---|
| Thu, Oct 29 | 71° | 70° to 71° | 2:54 PM | Oct 30, 7:10 AM EDT |
| Wed, Oct 28 | 69° | 68° to 69° | 11:57 AM | Oct 29, 7:19 AM EDT |
| Tue, Oct 27 | 72° | 72° to 73° | 2:14 PM | Oct 28, 7:10 AM EDT |
| Mon, Oct 26 | 72° | 72° to 73° | 3:53 PM | Oct 27, 7:10 AM EDT |
| Sun, Oct 25 | 66° | 66° to 67° | 3:20 PM | Oct 26, 7:10 AM EDT |
| Sat, Oct 24 | 64° | 64° to 65° | 3:33 PM | Oct 25, 7:10 AM EDT |
| Fri, Oct 23 | 64° | 64° to 65° | 2:37 PM | Oct 24, 7:10 AM EDT |
| Thu, Oct 22 | 70° | 69° to 70° | 3:43 PM | Oct 23, 7:10 AM EDT |
| Wed, Oct 21 | 68° | 68° to 69° | 3:06 PM | Oct 22, 7:09 AM EDT |
| Tue, Oct 20 | 72° | 71° to 72° | 2:48 PM | Oct 21, 7:09 AM EDT |
| Mon, Oct 19 | 69° | 68° to 69° | 3:46 PM | Oct 20, 7:10 AM EDT |
| Sun, Oct 18 | 62° | 61° to 62° | 4:08 PM | Oct 19, 7:10 AM EDT |
| Sat, Oct 17 | 62° | 62° to 63° | 12:00 AM | Oct 18, 7:19 AM EDT |
| Fri, Oct 16 | 80° | 80° to 81° | 3:45 PM | Oct 17, 7:19 AM EDT |
| Thu, Oct 15 | 77° | 77° to 78° | 12:22 AM | Oct 16, 7:09 AM EDT |
| Wed, Oct 14 | 90° | 89° to 90° | 2:25 PM | Oct 15, 7:09 AM EDT |
| Tue, Oct 13 | 82° | 82° to 83° | 2:33 PM | Oct 14, 7:10 AM EDT |
| Mon, Oct 12 | 76° | 76° to 77° | 4:16 PM | Oct 13, 7:10 AM EDT |
| Sun, Oct 11 | 67° | 67° or belowbottom tail | 6:17 PM | Oct 12, 7:10 AM EDT |
| Sat, Oct 10 | 72° | 72° to 73° | 12:39 PM | Oct 11, 7:09 AM EDT |
| Fri, Oct 9 | 77° | 76° to 77° | 1:58 PM | Oct 10, 7:19 AM EDT |
| Thu, Oct 8 | 81° | 80° to 81° | 3:18 PM | Oct 9, 7:19 AM EDT |
| Wed, Oct 7 | 72° | 72° to 73° | 3:48 PM | Oct 8, 7:20 AM EDT |
| Tue, Oct 6 | 66° | 66° to 67° | 3:48 PM | Oct 7, 7:11 AM EDT |
| Mon, Oct 5 | 74° | 73° to 74° | 3:27 PM | Oct 6, 7:12 AM EDT |
| Sun, Oct 4 | 65° | 65° to 66° | 5:14 PM | Oct 5, 7:11 AM EDT |
| Sat, Oct 3 | 67° | 68° or belowbottom tail | 3:13 AM | Oct 4, 7:12 AM EDT |
| Fri, Oct 2 | 86° | 85° to 86° | 4:05 PM | Oct 3, 7:11 AM EDT |
| Thu, Oct 1 | 83° | 82° to 83° | 3:45 PM | Oct 2, 7:21 AM EDT |
| Wed, Sep 30 | 80° | 79° to 80° | 2:17 PM | Oct 1, 7:11 AM EDT |
Source: Each market's result, settlement value and time: Kalshi's public market data; Time of the high: NWS climate reports for KDCA, via IEM
Over 359 days (Oct 31, 2025 to Oct 30, 2026), the median time of the official high was 3:28 PM local standard time, and half the highs came between 2:22 PM and 4:16 PM. Over the last 60 days the median was 3:13 PM.
Reagan National's high came before 1 AM standard time (1 to 2 AM daylight time) on 12 of 359 days (3%): the climate day's warmest minutes were its first.
KDCA report times, standard time. 1 without a time (MM) left out.
Source: NWS climate reports for KDCA, via IEM; IEM table of NWS climate reports
Kalshi's Washington DC market settles on Reagan National (KDCA) and nothing else. Dulles International Airport (KIAD) publishes its own climate report, with its own daily high, which doesn't count.
Dulles International Airport (KIAD) against Reagan National, 34 km apart
Over 360 days (Oct 21, 2025 to Oct 20, 2026), the two official highs were the same whole degree on 71 of 360 days (20%). Dulles was warmer on 70 and cooler on 219, −0.8°F on average, and 2°F or more apart (a bracket's width) on 163.
Widest gaps: Mar 22, 2026, KIAD 86° and KDCA 78°; Jan 25, 2026, KIAD 18° and KDCA 29°.
Source: NWS climate reports for KIAD (CLIIAD), via IEM; NWS climate reports for KDCA, via IEM
On 183 days from May 1, 2026 to Oct 30, 2026, the NWS's afternoon preliminary report (usually "as of 5 PM" local time) had the same high as the final report on 172 of 183 days (94%). The final report came in higher on 11 and never lower.
10 of those 11 higher finals put the high after the 5 PM cutoff.
Source: Every NWS climate report issued for KDCA (CLIDCA), via IEM's text archive
The normal high for Oct 31 is 64°F and the record high is 85°F. The normal falls to 53°F by Nov 30.
360 final highs at KDCA, Oct 31, 2025 to Oct 30, 2026, against the normal and record each report printed.
Source: NWS climate reports for KDCA, via IEM; NOAA NCEI U.S. Climate Normals
Climate-report stations near Reagan National, and how their official highs ran against it. None settles the Washington DC market.
Other reporting stations within 25 km (METARs only, no climate report): Andrews AFB (KADW, 15 km), College Park Arpt (KCGS, 18 km), Fort Belvoir/Davison (KDAA, 20 km).
Straight-line distances from KDCA; snapshot Oct 21, 2026.
Source: IEM's list of NWS climate-report sites; aviationweather.gov station information
Ronald Reagan Washington National Airport (KDCA), the station named by the climate-report code CLIDCA in the market's rules. Not Dulles.
Midnight to midnight EST, local standard time. During daylight saving that is 1:00 AM Oct 31 to 1:00 AM Nov 1 EDT.
Trading closes at 1:00 AM EDT after the day ends. Over the last 77 settled days the result posted a median of 6.2 hours after close.
60° or below, 61° to 62°, 63° to 64°, 65° to 66°, 67° to 68°, 69° or above, compared with Reagan National's published whole-degree high. The two tails are strict.
On 9 of 77 settled days from Aug 14, 2026 to Oct 29, 2026 (12%): 8 on the bottom tail and 1 on the top tail.
Over 359 days to Oct 30, 2026, the median time of the official high at KDCA was 3:28 PM local standard time. On 12 of those days it came before 1 AM standard time.
From May 1, 2026 to Oct 30, 2026, the afternoon preliminary report's high matched the final report's on 172 of 183 days. The final was higher on 11 and lower on 0.
No. Only Reagan National (KDCA) does. Over 360 days to Oct 20, 2026, KIAD's official high was the same whole degree as KDCA's on 71 days and 2°F or more apart on 163.
The rules every city shares · Reading CLIDCA · The Aug 14, 2026 change
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