Native macOS App — No Electron

Weather Intelligence
for macOS

Track, compare, and analyze weather like never before. Build your own personal weather database with forecast accuracy scoring and year-over-year analysis.

Download on Mac App Store Learn More
See It In Action

Apple Weather polish.
Bloomberg data density.

A premium dark-mode interface with condition-colored accents, persistent sidebar, and full keyboard navigation.

Weather Lair — Minneapolis, MN
Favorites
☀️ Minneapolis 72°
🌧️ Seattle 58°
⛅ London 52°
All Cities
🌤️ Tokyo 68°
☀️ Miami 85°
Now
Forecast
History
Compare
Trends
☀️ Clear
72°
Feels like 74° · H:78° L:61°
Humidity
45%
Wind
8 mph
AQI
42
Features

More than a forecast.

Weather Lair goes beyond today's weather — it builds a personal historical database and reveals patterns no other weather app shows you.

🗄️

Personal Weather Database

Every 30 minutes, Weather Lair captures a full weather snapshot — temperature, humidity, wind, pressure, visibility, and more. Over time, this builds into a rich historical record.

🎯

Forecast Accuracy Scoring

Captures forecasts when they're made, then scores them against actual conditions. See accuracy by city, lead time, and metric with a lead-time accuracy curve.

📊

Year-over-Year Analysis

Is this winter actually colder than last year? Compare any date range against the same period in previous years with side-by-side temperature, wind, and precipitation charts.

📈

Trend Analytics

Monthly averages, condition frequency charts, AQI trends, and rolling averages reveal weather patterns that daily forecasts never show.

🔔

Custom Weather Alerts

Set threshold-based alerts on any metric — freezing temps, high winds, AQI spikes, heat index warnings. Get notified instantly via macOS notifications.

🖥️

Widgets & Menu Bar

Desktop widgets for current conditions, forecast glance, and accuracy scores. Persistent menu bar shows live temperature. Full keyboard navigation with ⌘ shortcuts.

7
Data Tabs Per City
0
Third-Party SDKs
3
Widget Types
∞
Cities Worldwide
Aviation Mode

Built for Pilots.

Toggle Aviation Mode to unlock a full pilot weather toolkit — from live METAR/TAF decodes to crosswind calculations and flight planning.

  • M METAR & TAF Decodes — Live observations and terminal forecasts with FAA flight category badges
  • ↗ Crosswind Calculator — Runway diagrams with headwind/crosswind components and best-runway selection
  • ⚠ Personal Minimums — Set ceiling, visibility, and wind limits with marginal and no-go warnings
  • N NOTAMs — TFRs, runway closures, and airspace alerts from the FAA API
  • 📡 Weather Radar — Animated radar overlay with frame scrubber via RainViewer
  • ✈ Flight Planning — Multi-leg routes with per-station weather briefings and go/no-go assessment
Flight Categories
VFR
MVFR
IFR
LIFR
Ceiling > 3,000 ft  ·  Visibility > 5 SM
METAR KMSP VFR
KMSP 061953Z 33008KT 10SM FEW250 22/06 A3012 RMK AO2
Wind
330°/8kt
Visibility
10 SM
Ceiling
CLR
Altimeter
30.12
Your Data

Your Data. Your Mac.

Weather Lair stores everything locally. No accounts, no analytics, no tracking — just weather data under your complete control.

💾

Local Storage

All weather history lives in a SwiftData database on your Mac. Export it as JSON anytime. We don't operate servers.

🔒

Zero Tracking

No analytics SDKs. No advertising identifiers. No usage telemetry. Built with zero third-party dependencies — Apple frameworks only.

🔑

Full Control

API keys stored in macOS Keychain. iCloud syncs only your city list. Delete a city and all its history vanishes instantly.

Support

Frequently Asked Questions

Everything you need to know about Weather Lair.

Need Help?

Can't find what you're looking for? Reach out and we'll get back to you promptly.

weatherlair.app@gmail.com

Keyboard Shortcuts

Weather Lair is built for power users:

⌘R  Refresh
⌘1–7 Switch tabs
⌘N  Add city
⌘F  Search
⌘⇧F Toggle favorite
Press ⌘N or click the "+" button in the sidebar. Search for any city worldwide — Weather Lair uses Apple's MapKit geocoding to find locations. US cities automatically use the National Weather Service API, while international cities use Apple WeatherKit with an Open-Meteo fallback.
No API keys are required for core weather features. The National Weather Service and Open-Meteo APIs are free and keyless. Two optional features use free API keys: AirNow (US air quality data) and FAA NOTAMs (aviation notices). Both are free to register and can be entered in Settings.
Weather Lair captures forecast data at the time it's issued, recording what was predicted for future dates. When those dates arrive, it compares the forecast against actual observed conditions. The Compare tab shows accuracy scores by metric (temperature, precipitation, wind) and a lead-time accuracy curve showing exactly how far ahead forecasts remain reliable for each city.
Aviation Mode is an optional feature for pilots. Enable it during onboarding ("Are you a pilot?") or anytime in Settings. It adds an Aviation tab with METAR/TAF decodes, flight category badges (VFR/MVFR/IFR/LIFR), crosswind calculators, personal weather minimums, NOTAMs, weather radar, flight planning with route briefings, and a digital flight log.
If you have iCloud enabled, Weather Lair syncs your city list, favorites, custom alerts, and tracked airports across your Macs using Apple's CloudKit. Historical weather data (snapshots, forecasts, flight logs) stays local to each Mac and is never synced. If iCloud is unavailable, the app automatically falls back to local-only storage.
Go to Settings → Data to export your entire weather database as a JSON file with full schema versioning. You can also import data from a previous export. The History tab additionally supports CSV export for individual date ranges and cities — great for spreadsheet analysis.
Weather Lair uses dual providers: US cities pull from the National Weather Service (NOAA) — government-grade 2.5km grid data with 7-day forecasts and text narratives. International cities use Apple WeatherKit with an Open-Meteo fallback. Air quality for US cities comes from the EPA AirNow network. Aviation data comes from the FAA Aviation Weather Center. A provider badge on each city shows which source is active.