Thirty Summers

A 5-second daily call against 30 years of your town's real weather record. No forecasts - just your gut, a year that fills in, and a rival to challenge.

Thirty Summers is a daily weather-perception game. Every day, feel the air and pick a shade on the ramp - warmer, cooler, or right on the mark. No forecasts, no data to peek at first. Just your gut against your town. It takes five seconds.

At 18:00 local time, the record answers: today, ranked against 30 years of this exact date. Warmer than 82% of them? Colder? The verdict is a straight percentile, never a guess dressed up as a fake-precise number.

Every call becomes a square. Play long enough and your year fills in - a full grid of streaks, misses, and the days your instinct nailed it. Zoom out further and your town's summers stack up side by side, so you can watch the record shift for yourself, one bar at a time.

Argue about the weather with someone specific. Invite a rival, agree on a shared town, and compare calls day after day - one shared record, two guts, a running score.

Every percentile in Thirty Summers comes from your town's real 30-year weather record, built from decades of observations - never invented, never rounded up for effect.