Weather Bandit

Deterministic, LLM-free weather forecasts from the free, no-key Open-Meteo API. Cross-validates three deterministic models, computes ensemble-derived probabilities, and prints a structured daily outlook as Markdown + JSON.

No API key, no LLM, no network beyond Open-Meteo.

Install

npm install -g weather-bandit

Requires Node.js 22 or newer.

Quick Start

# Print a cross-validated outlook for Berlin (default city)
weather-bandit outlook

# Another city
weather-bandit outlook "New York"

# Structured JSON to stdout
weather-bandit outlook Berlin --json

# Reusable Markdown variants
weather-bandit outlook Berlin --style briefing
weather-bandit outlook Berlin --style summary
weather-bandit outlook Berlin --style tables

# Analog forecast (conditional climatology) for a target beyond the forecast horizon
weather-bandit analog Blavand --from 2026-08-21 --to 2026-09-03

Commands

weather-bandit outlook [city] [--days <n>] [--json] [--style full|briefing|summary|tables]
weather-bandit analog [city] --from <YYYY-MM-DD> --to <YYYY-MM-DD> [--lookback <days>] [--top <n>] [--json]

The CLI is thin — all fetching, cross-validation, and rendering live in @weather-bandit/core. The default city is Berlin.