General information, not financial, investment, legal, tax or betting advice · Prediction markets carry risk of loss · 18+ or the legal age in your region
The Index 100/Categories/Weather and climate
Category guide

Weather and climate prediction markets, explained without the noise.

An independent guide to weather and climate prediction markets: temperature, rainfall, snowfall, and hurricane contracts, how they settle against official data such as the National Weather Service, what they cost, and where they trade. Information, not advice. As of June 2026.

Last reviewed 23 June 2026 · Facts and fees as of June 2026 · Illustrative editorial examples

2
Outcomes per contract
Binary: resolves to one dollar or zero
1-99¢
Price range
The price is the implied probability
3
Platforms rated here
Kalshi, Polymarket, ForecastEx
Varies
Where it is legal
Reviewed on the legality hub
Rated best for this category

Where weather and climate markets actually trade well.

01
Kalshi
Regulated US venue with clear settlement rules.
91/100
02
Polymarket
The deepest liquidity we track in this category.
86/100
03
ForecastEx
CFTC exchange via Interactive Brokers.
80/100
How outcomes settle

A contract is a question with two clear answers.

Most markets here are binary: a clearly defined yes or no question. Each contract resolves to one dollar if yes and zero if no. The price you pay between 1 and 99 cents is the market's live read on the odds.

Settlement follows a written rule defined before trading: the named source, the date, and how edge cases are handled. Read that rule before you trade; it is the contract.

Resolution sources and timing differ by platform and market. Always check the specific market's rules, not the headline.

Price to implied probability

Drag to see how a contract price maps to an implied chance, and what 100 dollars would return if it resolves yes.

Contract price
64¢
Implied chance
64%
Stake $100 if YES
$156
profit +$56
If NO
$0
you lose your $100 stake

A price is the market's estimate of probability, not a forecast of the result and not advice. Fees and spreads reduce real returns. Illustrative; excludes fees.

Costs compared

What it costs to take a position.

Structures differ. Some charge a per-contract fee, others earn on the spread. Compare like with like. As of June 2026; illustrative.

Platform
Cost model
Deposit / withdraw
Notes
Kalshi
Per-contract fee scaled to price
ACH, debit, wire (USD)
Score 91/100 · see profile
Polymarket
Spread-based; low explicit fees
Stablecoin / intermediary
Score 86/100 · see profile
ForecastEx
Low per-contract fee
Linked brokerage (USD)
Score 80/100 · see profile
Robinhood
Low per-contract fee
Linked brokerage (USD)
Score 79/100 · see profile
Step by step

How a trade actually works.

1
Read the resolution rule
Find the exact source and date the market uses to decide, and how it treats edge cases. This rule is the contract.
2
Check your eligibility
Confirm the platform is legally available where you live and that you meet the age and verification rules.
3
Read the price as a probability
A 64 cent contract implies a 64 percent chance. It is an estimate, not a forecast, and it moves as others trade.
4
Size the position honestly
Decide your maximum loss before you buy. Account for fees and the spread, which quietly reduce real returns.
5
Place and monitor
You can usually sell before resolution at the current price to lock in or cut a loss, if there is enough liquidity.
6
Settlement and payout
When the event resolves, winning contracts pay one dollar and losing ones pay nothing. Withdrawal timing depends on the platform.
Before you trade

Five questions worth asking first.

If you cannot answer these for a specific market, you do not yet understand what you would be buying.

What exact source and date decides this market, and who adjudicates a dispute?

Is there enough liquidity for me to exit at a fair price before resolution?

What are the all-in costs, fee, spread, deposit and withdrawal, on a trade this size?

Is this platform legally available to me, and am I within its age and verification rules?

What is the most I am willing to lose here, and have I decided that before buying?

FAQ

The questions readers keep asking.

What is a weather prediction market?

A weather prediction market is a market in binary contracts on a defined weather or climate outcome, such as whether a named city's high temperature reaches a stated level on a given day. Each contract settles at one dollar if the outcome happens and zero if it does not, and the price between one cent and ninety nine cents reads as the implied probability. This is general information, not advice.

How does a temperature contract settle?

It settles against the official data source named in the contract rules. On regulated United States venues, daily temperature markets commonly resolve against the final figure reported by the National Weather Service for the named station, typically published the following day. Always read the named source, station, and time before trading.

Are weather prediction markets legal?

On federally overseen United States exchanges, weather and climate event contracts are offered to verified users under Commodity Futures Trading Commission oversight, as of June 2026. Onchain venues without United States registration are a separate, contested question for United States users. Check your local legality page and the platform terms before trading.

What kinds of weather contracts exist?

Common shapes include daily high and low temperature thresholds and ranges for major cities, monthly rainfall and snowfall totals, and storm contracts on whether a named storm or a storm of a given category makes landfall within a defined window. The exact condition and source are set on each market page.

Why do weather markets move so much near resolution?

Forecasts sharpen as the event approaches, so the implied probability on a short dated weather contract can swing as new model runs and observations arrive. That uncertainty cuts both ways and is a core reason these markets carry a real risk of loss.

Keep reading
Platform profile
Kalshi, rated 91
Legality hub
Where these markets are legal, state by state