When Do Kalshi Weather Markets Close? The 24-Hour Clock Of A Weather Market
Ask when Kalshi weather markets close and the literal answer fits in a sentence: a temperature market closes after the day it measures has finished in that market's own city, on that city's local time. The useful answer is longer, because the close is the least interesting moment on the clock. Every one of these contracts lives a single 24-hour life, and the trade it offers changes completely as that life runs: a forecast debate at the start, a live observation race in the middle, and by the end a settled question that happens to still have an open order book. Somewhere late in that window sit the strangest prices on the board, rungs trading for pennies against a result that is already written. Hold onto that, because by the end of this piece those prices will make perfect sense, and so will the reason you should rarely be the one paying them.
The Quick Answer
Kalshi weather markets close after their target date has ended in the market's own city, on local time, which means close times vary by city time zone: a New York market for a given date wraps up hours before the Los Angeles market for the same date. Well before either closes, the outcome becomes knowable, because a daily high is set in mid-afternoon and an overnight low pre-dawn, so the market spends its final hours drifting toward an answer that is already sitting in the observations. The full clock, stage by stage, and why the same ladder is a different proposition at each point on it, is below.
A Contract That Lives Exactly One Day
Start with what the clock is attached to. A Kalshi temperature contract is a CFTC-regulated event derivative that settles to $1 or $0 against readings from one named weather station, and the settlement station is not always the airport you would guess. Each city's bands form a ladder that works like a probability distribution, where a rung priced at 30 cents is the crowd calling a 30% chance, a craft of its own covered in how to read a temperature band ladder. The readings that decide everything are public: the same government weather data these markets settle on that every forecaster works from.
The clock has three phases. The market exists before its day begins, while the outcome is pure forecast. It trades through the observation day itself, while readings arrive and possibilities die. And it stays open for a stretch after the number is effectively made, until the target date has fully ended in local time and settlement takes over. Three phases, one ladder, and, as we will get to, three very different trades.
Close Times Follow The City's Clock, Not Yours
These markets have no national closing bell. A weather day in Phoenix ends when midnight arrives in Phoenix, not when it arrives where you live, and the market for that day closes after that local day is done. Put a handful of cities side by side and the staggering is obvious: on your screen, the Eastern cities finish their day first, the Mountain and Pacific cities hours later, even though every one of those markets is stamped with the same calendar date.
That sounds like trivia until you are the trader watching two ladders at once. An East Coast trader following a West Coast market is living three hours ahead of it; the afternoon peak that decides a Los Angeles high is still building while the New York book for the same date is already old news. The habit that saves you is simple: read every market on its own city's clock. The date on the ticker belongs to that city, the observation day runs on that city's daylight, and the close lands after that day ends locally. Your time zone is not part of the contract.
The other bookkeeping wrinkle worth one sentence here: high and low markets do not even share a shape of day. A daily high belongs to the afternoon of its date, while an overnight low is dated the morning it bottoms out, so tonight's cooling is tomorrow's ticker. The full split is its own subject, covered in high temp vs low temp markets.
The Outcome Becomes Knowable Well Before The Close
Here is the structural fact the whole clock turns on: the outcome becomes knowable well before the market closes, because the market does not close when the question is answered. A daily high is made by afternoon heating and is typically set by mid-afternoon; an overnight low bottoms out just before dawn. From that moment the answer exists in the observations, and every reading the station has already touched is locked in. On a high book the running maximum is a floor that can only rise, so every band sitting fully below it is dead long before the market closes. The book stays open anyway, because the contract's day has not formally ended.
That gap between decided and closed is why these markets have no closing line in the sportsbook sense. No kickoff freezes the price; observations arrive continuously and the price drifts with them, so by the final hours the quote is largely the outcome in disguise, with a band that opened near 50% trading above 95% or below 5% while the book is technically still live. What moves a prediction market price in general is new information, and a weather market simply runs out of new information before it runs out of clock. How fast it runs out depends on climate: a humid coastal city's temperature barely moves off script, so its ladder converges early, while a dry inland city can swing hard enough to keep the question open deep into the afternoon.
One Ladder Around The Clock: A Worked Example
Put numbers on it. Take a daily-high ladder in a dry inland city, the kind whose afternoons can swing, and follow a single band: 86° or above. The night before, nothing has been observed, the forecast calls for a peak near 87°, and the band trades around 55 cents, an implied 55% chance. That price is a forecast debate and nothing else. By mid-morning the station has touched 78°, and that reading is a floor: every band below 78° is dead and trading for a cent, while the 86° band has drifted to about 70 cents, roughly a 70% claim, as the heating tracks its script. At mid-afternoon the station prints 88° and the argument ends. The band moves to within a few cents of $1, the tail bands up at 90° and above collapse toward 3 cents, an implied 3% that the afternoon has one more push in it, and the ladder spends its remaining open hours as settlement in disguise.
The prices above are an illustration of how one band moves through the window, not quotes from any live board.
| Stage Of The Window | What is known | What the trade actually is |
|---|---|---|
| Before The Day Starts | Nothing observed; forecast only | A forecast debate. Widest uncertainty, widest spreads, most of the ladder alive |
| Morning Of The Day | A few readings; a weak floor | Forecast plus a ratchet: the bottom of the ladder is starting to die |
| Mid-Afternoon | The peak is in or nearly in | An observation trade. The question is largely settled; a few bands hold all the value |
| After The Peak, Until Close | The number is made | Settlement in disguise. Prices sit pennies from $1 or $0 |
The stage worth narrating is the last one, because it is the strangest. The market is open, the outcome is written, and yet trades still print. Some of that is traders closing out early rather than waiting for settlement. Some of it is the tail end of the asymmetric payoff: a rung that looks dead offering a cent or two to whoever is willing to sell certainty. And some of it is simple impatience, paying the spread for an instant fill in a market where the whole remaining question is worth a few cents. An instant fill at that hour usually means you paid for it. The first stage deserves one more sentence too, because it is the fairest hour these markets have: before any reading exists, every participant is working from the same publicly funded forecast. There is no injury report on the atmosphere, no locker-room leak, which makes the early window one of the few places a careful newcomer is not structurally behind on information.
The Cheap Rungs, And What Selling Them Costs
The late-window prices create a standing temptation, and it deserves its own warning. When most of a ladder is dead, the dying rungs get cheap, and selling one collects a small premium against the risk of most of a dollar. Sell a rung at 6 cents and you have collected 6 cents against 94 cents of downside, the market's way of claiming a roughly 94% chance the rung stays dead. Roughly speaking, one loss erases the premiums from about 15 wins. That arithmetic, not the hit rate, is what makes position sizing the whole game in these markets, and it means a red day that wipes out a green stretch is the shape of this style of trading working as designed, not a malfunction. The clock concentrates the temptation at a specific hour: late in the window, when a rung looks unreachable and the premium looks free. That is exactly the moment the arithmetic is most against the seller, because the market has already read the same observations you have.
Where We Stand In These Markets, Honestly
Full disclosure: Stokastic trades these markets and holds positions in them, and where a settled position is described, we were the seller. You will not find our running results on this page, and that is deliberate. This page is permanent, and any figure printed here would freeze the moment it published while the real log kept moving. The shape is what we can tell you: the log is short, it sits in the red so far, and it is far too small to confirm the edge or to rule it out. Because these markets have no closing line to beat, the only honest scoreboard is realized settlement rates over a large sample, and that takes far longer than people expect. The current picture lives on our Kalshi weather markets hub, which is rebuilt through the day.
Nothing here is a pick, and the clock is the reason a pick would not survive the page anyway: whatever looked attractive when this was written has already been overtaken by observations. If picks with reasoning attached are what you came for, that is a different product, and it lives on the sports side of the shop, where the board does not answer itself by mid-afternoon. The free expert picks hub is where OddsShopper's handicappers publish theirs, and our Kalshi picks today page tours the wider Kalshi board, sports included. This page is the market's structure, offered as exactly that.
Kalshi Weather Market Clock FAQ
When do Kalshi weather markets close? After the target date has ended in the market's own city, on that city's local time. There is no single closing hour across the board: an Eastern market for a date finishes before a Pacific market for the same date, so the reliable move is to check the close shown on the specific market page rather than assume a uniform time.
Can you still trade after the temperature is effectively set? Usually, yes. A daily high is typically made by mid-afternoon and an overnight low pre-dawn, while the market stays open until the local day is over. Prices in that stretch sit close to $1 or $0, so the remaining trade is mostly early exits and penny-sized certainty selling, and crossing the spread there can cost more than the position is worth.
Does a weather market close early once the outcome is decided? No, and this is the clock's quietest lesson: the close is driven by the calendar, not by the answer. The market stays open until its target date has fully ended in local time, even when the afternoon peak settled the question hours earlier, which is exactly why you can find near-certain rungs still quoted late in the window. A low market adds a further wrinkle: it is dated the morning the low is observed, so its window is offset from the high market's to begin with.
The Clock Is The Instrument
Those pennies-from-certainty prices we promised to explain at the top are not a mystery anymore: they are what a market looks like when it is open after its question is answered, in the stretch between a mid-afternoon peak and a close that waits for midnight in a distant time zone. That is the whole lesson of the 24-hour clock. A prediction market is always a machine for pricing a question, but a weather market's question dissolves on a schedule, and the same ladder is a forecast debate at breakfast, a live race at noon, and a formality by dinner. Nobody has better information here; the edge, if anyone has one, is in understanding the instrument, and the instrument is mostly a clock. Watch a few cities move through a full day on the weather hub and you will stop asking when the market closes and start asking the better question: what time is it, locally, in the market I am looking at?
Disclosure and fine print. Stokastic trades these markets and holds positions in them; where a settled position is described, we were the seller. We have no affiliate or commercial relationship with Kalshi. Kalshi weather contracts are CFTC-regulated event derivatives traded on a designated contract market, not sportsbook wagers, and they can lose their full value. 18+. Available where Kalshi operates. Risk of loss is real and, on the side we trade, individually large. This is an open research log of a strategy we have not yet proven. Nothing here is trading advice.
