Both markets settle on Hartsfield-Jackson (KATL), but they count the high differently.
Hartsfield-Jackson (KATL)
The day's official high, 1 AM to 1 AM while clocks are on daylight time.
Hartsfield-Jackson International Airport (KATL)
The highest hourly reading on NOAA's page for the station, in whole degrees, on the local calendar day.
Highest hourly reading so far at Hartsfield-Jackson International Airport (KATL): 64°F at 12:52 AM. The line is each hourly report, the reports Polymarket's rules count; the stripes are its ranges.
Atlanta so far today: the high is 64°F (12:52 AM), in the 64° to 65° bracket. The favorite is 70° to 71° at 55¢ (Polymarket, 30 minutes late), 6° above the high so far. The day ends at 12:00 AM EDT. 7 reports from KATL from 12:00 AM to 7:18 AM EDT, between 60°F and 64°F; the latest 61°F at 6:52 AM.
| Bracket | Price | Note |
|---|---|---|
| 82° or above | <1¢ | |
| 80° to 81° | <1¢ | |
| 78° to 79° | <1¢ | |
| 76° to 77° | 1¢ | |
| 74° to 75° | 3¢ | |
| 72° to 73° | 24¢ | |
| 70° to 71° | 55¢ | favorite |
| 68° to 69° | 18¢ | |
| 66° to 67° | 2¢ | |
| 64° to 65° | <1¢ | high so far |
| 63° or below | <1¢ |
| Time | Reading |
|---|---|
| 6:52 AM | 61°F |
| 5:52 AM | 60°F |
| 4:52 AM | 62°F |
| 3:52 AM | 62°F |
| 2:52 AM | 63°F |
| 1:52 AM | 64°F |
| 12:52 AM | 64°F |
| Range | Price (30 min late) | Traded |
|---|---|---|
| 82° or above | <1¢ | 260 |
| 80°–81° | <1¢ | 282 |
| 78°–79° | <1¢ | 582 |
| 76°–77° | 1¢ | 706 |
| 74°–75° | 3¢ | 1,232 |
| 72°–73° | 24¢ | 6,207 |
| 70°–71° | 55¢ | 4,123 |
| 68°–69° | 18¢ | 3,528 |
| 66°–67° | 2¢ | 1,113 |
| 64°–65°high so far | <1¢ | 2,419 |
| 63° or below | <1¢ | 575 |
Almanac's °F is each report's tenths of a degree Celsius, rounded. Polymarket settles on NOAA's page for the station, which lists the same reports. Today's market on Polymarket.
Which range will Atlanta settle on today? For fun: no money, no orders, nothing sent to Polymarket. It counts on the weekly leaderboard: a right call scores 100 minus its price when you called it.
Create a free account to make your call.
Polymarket's winning range held the high Kalshi settled on for 15 of 30 days; it cooler on 15.
| Day | Kalshi (KATL): settled on | Polymarket (KATL): winning range | Polymarket wasCompared |
|---|---|---|---|
| Oct 29 | 76° (76°–77°) | 76°–77° | Same high |
| Oct 28 | 75° (74°–75°) | 74°–75° | Same high |
| Oct 27 | 74° (74°–75°) | 74°–75° | Same high |
| Oct 26 | 71° (71°–72°) | 70°–71° | Same high |
| Oct 25 | 70° (69°–70°) | 70°–71° | Same high |
| Oct 24 | 70° (69°–70°) | 68°–69° | Polymarket cooler |
| Oct 23 | 73° (72°–73°) | 72°–73° | Same high |
| Oct 22 | 76° (76°–77°) | 74°–75° | Polymarket cooler |
| Oct 21 | 75° (74°–75°) | 74°–75° | Same high |
| Oct 20 | 76° (76°–77°) | 74°–75° | Polymarket cooler |
| Oct 19 | 70° (70°–71°) | 68°–69° | Polymarket cooler |
| Oct 18 | 67° (66°–67°) | 66°–67° | Same high |
| Oct 17 | 67° (67°–68°) | 66°–67° | Same high |
| Oct 16 | 84° (83°–84°) | 82°–83° | Polymarket cooler |
| Oct 15 | 88° (87°–88°) | 86°–87° | Polymarket cooler |
| Oct 14 | 87° (87°–88°) | 86°–87° | Same high |
| Oct 13 | 87° (86°–87°) | 86°–87° | Same high |
| Oct 12 | 84° (83°–84°) | 82°–83° | Polymarket cooler |
| Oct 11 | 70° (70° or below) | 68°–69° | Polymarket cooler |
| Oct 10 | 68° (68° or below) | 68°–69° | Same high |
| Oct 9 | 73° (75° or below) | 72°–73° | Same high |
| Oct 8 | 85° (84°–85°) | 84°–85° | Same high |
| Oct 7 | 80° (79°–80°) | 78°–79° | Polymarket cooler |
| Oct 6 | 78° (78°–79°) | 76°–77° | Polymarket cooler |
| Oct 5 | 76° (76° or below) | 74°–75° | Polymarket cooler |
| Oct 4 | 78° (78°–79°) | 76°–77° | Polymarket cooler |
| Oct 3 | 86° (86°–87°) | 84°–85° | Polymarket cooler |
| Oct 2 | 84° (85° or below) | 82°–83° | Polymarket cooler |
| Oct 1 | 86° (85°–86°) | 84°–85° | Polymarket cooler |
| Sep 30 | 87° (87°–88°) | 86°–87° | Same high |
Source: Kalshi's settlements: Kalshi's public market data; Polymarket's results: each daily event
| Rule | Kalshi | Polymarket |
|---|---|---|
| What counts as the high | The day's official high for the station, as The Weather Company publishes it for Kalshi (weather.com/kalshi) for events from Aug 14, 2026. It has matched the NWS climate report's official high on 1,587 of 1,588 settled days, and that high counts a peak between hourly reports. | The highest reading in the "Temp" column of NOAA's time-series page for the station, using its hourly data, in whole degrees. A peak between two readings isn't in that column, so it can come out lower than the official high. |
| The day | Midnight to midnight local standard time, so 1 AM to 1 AM while clocks are on daylight time. | Every time listed on that day on NOAA's page, which shows the station's local clock time. |
| The ranges | Two-degree brackets, with an open bracket at each end. Where the brackets start moves from day to day (61°–62° one day, 62°–63° another). | Two-degree ranges that start on an even number (62°–63°), with an open range at each end. |
| When it settles | After the final report for the day is out, usually the next morning. | Once the first reading of the next day is on NOAA's page, or by 11:59 PM Eastern the next day. If NOAA has no data by then, the Weather Underground daily observations table is used. |
Source: Polymarket's market rules (read Thu, Oct 22); Kalshi contract terms; The Weather Company's Kalshi data
All 11 cities, Kalshi vs Polymarket
Almanac shows information and tools. It never says what to buy or sell and never places an order.