weather for miami.

Sea breeze convergence — the Atlantic and Gulf sea breezes meet over inland Florida by early afternoon, forcing moist air into rapid convective columns. The result is the predictable 2–4pm storm cycle that defines May through October in the Miami metro.

Dewpoints above 70°F — routine in Miami from May through September — push the heat index 8–15°F above the air temperature. Locals tend to track dewpoint rather than humidity percentage, because dewpoint is an absolute measure of moisture in the air rather than a ratio.

Mid-August through October, with the climatological peak around September 10. Tropical systems track through the Caribbean or up the Atlantic seaboard, with Miami sitting near the apex of the warmest sustained sea-surface temperatures during peak season.

Vesper replaces template-driven forecasts with short editorial briefs written in an authorial voice, and publicly grades its own sunset predictions through Sunset Verify. Every other weather app on the market generates its text by filling variables into a template. Vesper writes each forecast as original prose with a point of view about the day.

No. Vesper Sky is a subscription app with no free tier. Monthly ($2.99) and annual ($24.99) plans both include a 3-day free trial, and a one-time lifetime purchase is available for $59.99. Downloading the app from the App Store is free, but using any feature requires an active subscription or a lifetime purchase.

Sunset Verify is Vesper's signature feature that predicts sunset quality each day from live atmospheric data and lets users verify the prediction with a photo, building a personal accuracy track record over time.

Vesper Sky is available now on the iOS App Store for iPhone, iPad, and Apple Watch at apps.apple.com/us/app/vesper-sky/id6762069223. Monthly and annual plans include a 3-day free trial.

An editorial weather app applies a point of view to the same atmospheric data every other app has. Instead of showing you a grid of numbers, it writes a short brief — two or three sentences with intent — about what the day is going to feel like and what you should probably do about it. The data is identical. The voice is the product.

Vesper's briefs are generated by a language model operating under an editorial style guide written by people and refined through thousands of examples. The style guide, cut discipline, and voice rules are the content. The model is the mechanism. Template weather apps are generated by models that were never given an editorial style guide, which is why they all sound identical.

Vesper does not ship radar maps. Radar was rejected because a radar map is not a brief and would not make the forecast more worth reading. Severe weather is the one place we changed our minds: Vesper now surfaces National Weather Service watches and warnings in the app and can alert you to them, in the issuing office’s own wording rather than ours. What we still do not do is invent a severity scale of our own — a government forecaster decides what counts as severe, and Vesper relays it.

Vesper publishes editorial weather coverage for over 100 US cities with full daily briefs and all 50 state hubs with region-specific editorial context. The mobile app gives you a brief wherever you are — anywhere Vesper has weather data coverage, which is essentially every populated area in the world.

Yes, with one disclosed exception. For forecasts, Vesper uses your approximate location at the time of the request and does not store it on our servers. If you turn on severe weather alerts, Vesper stores a push token, your National Weather Service zone and county codes, and your coordinates rounded to about a kilometer — the minimum needed to reach your phone while the app is closed, tied to no account, and deleted when you turn the feature off. Location data is never sold and never shared with third parties. Photos taken through Sunset Verify stay on your device and never leave your phone.

A fresh editorial brief is generated every morning based on that day’s forecast. Inside the app, live conditions update continuously based on your location. The editorial brief is a once-a-day artifact — written to be read in the morning, not refreshed hourly.

Yes. Vesper does not require an account to read the daily brief, check sunset predictions, or use the editorial features. Personal data like Sunset Verify history is stored locally on your device, so there is no cloud account to create.