---
title: "Will the temperature in San Jose drop below 40°F in December 2026?"
canonical_url: https://betcrypto.now/events/will-the-temperature-in-san-jose-drop-below-40f-in-december-2026
status: live
trading_closes_at: 2027-01-01T07:59:00+00:00
total_volume_usd: 5312.75
venues: ["Kalshi", "Polymarket US"]
categories: ["Tech & Science"]
prices_as_of: 2026-10-09T08:20:45+00:00
publisher: BetCrypto
data_api: https://betcrypto.now/api/v1/events/will-the-temperature-in-san-jose-drop-below-40f-in-december-2026
---

# Will the temperature in San Jose drop below 40°F in December 2026?

Live · $5,313 traded · listed on Kalshi, Polymarket US

## About

If any hourly temperature value reported for KSJC in San Jose within December 1, 2026 through December 31, 2026 is strictly less than 40 degrees Fahrenheit, then the market resolves to Yes.

Data for KSJC is available at https://weather.com/kalshi. Temperature values are the hourly temperature observations reported by The Weather Company for KSJC. The market resolves Yes if any single hourly value within December 1, 2026 through December 31, 2026 satisfies the condition; a value exactly equal to 40 degrees does not. Data as published at the Expiration Time will be used; later revisions are disregarded. Hours with no reported value are treated as no observation; if no qualifying value is reported by the Expiration Time, the market resolves to No.

_From Kalshi's listing._

## Main market

| Outcome | Probability | Cheapest | Kalshi | Polymarket US |
|---|---|---|---|---|
| Yes | 75% | 82¢ on Kalshi | 82¢ | — |
| No | 25% | 32¢ on Kalshi | 32¢ | — |

## Open on a venue

- [Kalshi](https://betcrypto.now/go/e/320298?via=md)
- [Polymarket US](https://betcrypto.now/go/e/689173?via=md)

---

Probability is the cross-venue consensus (book midpoints, 0–100%). Venue columns are what buying costs there (the ask). Prices move constantly; re-check at the canonical URL or https://betcrypto.now/api/v1/events/will-the-temperature-in-san-jose-drop-below-40f-in-december-2026.

BetCrypto is an odds-comparison and information service. It accepts no wagers and gives no betting or financial advice; prediction-market availability depends on where you live.