Weather API (FastAPI) — Simple, no-key weather API

A tiny FastAPI application that fetches live weather (via wttr.in) and exposes:

• /weather?city=CityName — current weather
• /forecast?city=CityName — 3-day forecast

This repository contains everything needed to run locally or deploy to a host (Render, Vercel, Deta, etc.).

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Files

• main.py — main FastAPI app (defines app = FastAPI()).
• requirements.txt — Python dependencies.
• vercel.json — Optional config for Vercel deployments.
• README.md — this file.

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Quick start (local)

1. Create & activate a virtualenv (optional but recommended):

   python -m venv .venv
   # Windows
   .venv\Scripts\activate
   # macOS / Linux
   source .venv/bin/activate
   

2. Install dependencies: pip install -r requirements.txt

3. Run with Uvicorn: python -m uvicorn main:app --reload --host 0.0.0.0 --port 8000

4. Test:

   • http://127.0.0.1:8000/
   • http://127.0.0.1:8000/weather?city=London
   • http://127.0.0.1:8000/forecast?city=London