isobar-cli 1.0.2

A visually pleasing terminal weather tool focusing on Real Feel and Windchill.

Isobar CLI

A terminal weather tool designed to provide a fast, clean sense of what the weather feels like outside; right now and for the week ahead. Built with Python and Rich.

Philosophy

Isobar CLI answers a simple question: "What does it feel like outside right now, and do I need a jacket?"

Most weather apps overwhelm with data. Isobar strips away everything except what matters when deciding how to prepare for the day.

Design Principles

• Essential over comprehensive — Show Real Feel, not 47 data points.
• Terminal-native — Built for quick checks within a developer workflow.
• Zero friction — No API keys or configuration files required.
• Information density — Clean, borderless UI for maximum readability.
• Intentional features — Each feature must answer: "Does this help someone understand what it feels like outside?"

✨ Features

• Auto-Location — isobar detects the city automatically 🌍
• Weather Condition Icons — WMO-standard emoji + plain-English description (☀️ Clear sky, 🌨️ Moderate snow, ⛈️ Thunderstorm)
• Real Feel — Apparent temperature metrics (what it actually feels like).
• Air Quality Index — US AQI with health classifications 😷
• 7-Day Forecast — Full week outlook with color-coded highs/lows and daily rain %
• Hourly Outlook — Next 12 hours of temperature and rain chance (--hourly)
• Multiple Cities — Compare weather across several cities side-by-side.
• Smart Suggestions — Fuzzy city name matching if there is a typo.
• Shell Completion — Tab-complete city names based on search history.
• Dynamic Timezone — Sunrise/sunset shown in the city's local time, not yours.
• Precipitation Forecast — Next 6h rain/snow chance and totals.
• Smart Caching — 15-minute cache per city (~/.cache/isobar/)
• Color-Coded Temps — Intuitive color mapping for temperature ranges.
• Metric Support — --metric or -m for Celsius, km/h, and mm.
• No API Keys — Free Open-Meteo and ip-api.com.
• Zero Config — Works instantly after installation.

🚀 Installation

The recommended way to install Isobar is via pipx:

pipx install isobar-cli

Installation is also supported via Homebrew:

brew install KnowOneActual/tap/isobar

Note: Installing via Homebrew builds several high-performance dependencies (like numpy and h3) from source. This ensures a robust, isolated install but may take 5-10 minutes to complete.

Alternatively, install directly from PyPI:

pip install isobar-cli

Or install from source:

git clone https://github.com/KnowOneActual/isobar-cli.git
cd isobar-cli
pip install .

📱 Usage

# Auto-detect location
isobar

# Specify a city
isobar Chicago
isobar London Tokyo Paris     # Multiple cities
isobar "New York"             # Use quotes for multi-word cities

# Hourly outlook (next 12h)
isobar --hourly
isobar -H

# 7-day forecast
isobar --forecast
isobar -f
isobar "San Francisco" --forecast
isobar -f Sydney

# Metric units (Celsius, km/h, mm)
isobar --metric
isobar -m
isobar Tokyo -m

⌨️ Shell Completion

Isobar supports tab-completion for city names. To enable it for a shell:

Zsh:

isobar --install-completion zsh

Bash:

isobar --install-completion bash

(Note: A terminal restart may be required after installation).

🖥️ Example Output

               Chicago, Illinois Weather
 ☀️  Conditions:                        Mainly clear
 🌡️  Temperature:                             37.1°F
 🤔  Real Feel:                               30.4°F
 💨  Wind Speed:                             4.3 mph
 💧  Humidity:                                   58%
 ☔  Precip Chance:  0% (6h) | Dry conditions expected
 🌅  Sunrise:                                6:29 AM
 🌇  Sunset:                                 5:37 PM

           7-Day Forecast — Chicago, Illinois
  Day            Conditions        High     Low   Rain%
  Today      ☁️  Overcast         41.7°F  23.9°F    1%
  Fri Feb 27 ⛅  Partly cloudy    66.4°F  32.4°F    2%
  Sat Feb 28 🌨️  Moderate snow    44.0°F  26.5°F   38%
  Sun Mar 1  ☁️  Overcast         29.0°F  26.6°F   36%
  Mon Mar 2  ☁️  Overcast         33.6°F  27.1°F   36%
  Tue Mar 3  🌦️  Light drizzle    36.8°F  30.9°F   27%
  Wed Mar 4  🌦️  Moderate drizzle 41.3°F  33.5°F   46%

🛠 Tech Stack

Tool	Purpose
Typer	CLI framework
Rich	Terminal UI
Open-Meteo	Weather and forecast data
ipwho.is	Auto-location detection
timezonefinder	Dynamic timezone resolution
pytest	Unit testing framework
requests-mock	API testing
Ruff	Linting and formatting
pip-audit	Dependency security scanning

🔒 Security

Security is a fundamental priority for Isobar CLI. Multiple layers of automated scanning ensure the tool remains safe and secure for all users.

Security Measures

• Vulnerability Scanning: Trivy scans the filesystem and dependencies for known vulnerabilities.
• Static Analysis (SAST): Bandit and Semgrep analyze the code for insecure patterns.
• Dependency Auditing: pip-audit and GitHub Dependabot ensure third-party packages stay updated.
• Script Linting: ShellCheck enforces best practices for Bash scripts.
• Secret Scanning: Automated checks prevent the accidental commitment of sensitive credentials.

All security scans are integrated into the CI/CD pipeline and run on every push, pull request, and weekly schedule. Results are available via the GitHub Security tab.

📈 Project Status

✅ Phase 1 Complete — Caching and Auto-Location
✅ Phase 2 Complete — Precipitation, Sunrise/Sunset, and Condition Icons
✅ Phase 3 Complete — 7-Day Forecast, Dynamic Timezone, and UI Refinements
✅ CI/CD — Linting and security auditing integrated into every push.
Refer to ROADMAP.md and CHANGELOG.md for details.

🤝 Contributing

Detailed instructions are available in CONTRIBUTING.md. New features must answer: "Does this help someone understand what it feels like outside?"

📄 License

MIT. See LICENSE.