A guide for getting current weather conditions and forecasts from services such as wttr.in or Open-Meteo. It explains how to request weather for a named city, region, or airport.

Use it for current conditions, rain or temperature questions, multi-day forecasts, and weather checks while planning travel.

It provides a defined way to answer current-weather and forecast questions without an API key. It also clarifies that it is not intended for historical weather, severe alerts, or specialist forecasts.

weather — Skill for Claude Code and Codex by yokingma: A guide for getting current weather conditions and forecasts…

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add skills/yokingma/weclaws/weather

Any agent

npx skills add yokingma/weclaws --skill weather

Clone the repo

git clone --depth 1 https://github.com/yokingma/weclaws

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/yokingma/weclaws/weather.svg)](https://agentmods.dev/skills/yokingma/weclaws/weather)

Your own site

<a href="https://agentmods.dev/skills/yokingma/weclaws/weather"><img src="https://agentmods.dev/badge/skills/yokingma/weclaws/weather.svg" alt="Measured on agentmods" height="20"></a>

Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 624 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. Scan, not verified.

Origin 97% copy Near-identical to another mod in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5	$0.00055	$0.00624
Opus 5	$0.00028	$0.00312
Sonnet 5	$0.00011	$0.00125
Haiku 4.5	$0.00006	$0.00062

Measured 5d ago against content hash 07b03f0932a6, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

weather scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl "wttr.in/London?format=3"

Origin

This is a copy

97% identical to weather — 8 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

resources/skills/managed/weather/SKILL.md · 111 lines

What it actually says

Weather Skill

Get current weather conditions and forecasts.

When to Use

✅ USE this skill when:

"What's the weather?"
"Will it rain today/tomorrow?"
"Temperature in [city]"
"Weather forecast for the week"
Travel planning weather checks

When NOT to Use

❌ DON'T use this skill when:

Historical weather data → use weather archives/APIs
Climate analysis or trends → use specialized data sources
Hyper-local microclimate data → use local sensors
Severe weather alerts → check official NWS sources
Aviation/marine weather → use specialized services (METAR, etc.)

Location

Always include a city, region, or airport code in weather queries.

Commands

Current Weather

# One-line summary
curl "wttr.in/London?format=3"

# Detailed current conditions
curl "wttr.in/London?0"

# Specific city
curl "wttr.in/New+York?format=3"

Forecasts

# 3-day forecast
curl "wttr.in/London"

# Week forecast
curl "wttr.in/London?format=v2"

# Specific day (0=today, 1=tomorrow, 2=day after)
curl "wttr.in/London?1"

Format Options

# One-liner
curl "wttr.in/London?format=%l:+%c+%t+%w"

# JSON output
curl "wttr.in/London?format=j1"

# PNG image
curl "wttr.in/London.png"

Format Codes

%c — Weather condition emoji
%t — Temperature
%f — "Feels like"
%w — Wind
%h — Humidity
%p — Precipitation
%l — Location

Quick Responses

"What's the weather?"

curl -s "wttr.in/London?format=%l:+%c+%t+(feels+like+%f),+%w+wind,+%h+humidity"

"Will it rain?"

curl -s "wttr.in/London?format=%l:+%c+%p"

"Weekend forecast"

curl "wttr.in/London?format=v2"

Notes

No API key needed (uses wttr.in)
Rate limited; don't spam requests
Works for most global cities
Supports airport codes: curl wttr.in/ORD

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

5d ago First seen · 111 lines · 55 tokens per session scan A 07b03f0932a6

Subscribe to this mod's changes

weather is a skill published in the GitHub repository yokingma/weclaws (38 stars, last pushed 3mo ago), licensed MIT. It adds 55 tokens to every session and 624 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 97% identical to weather, differing in 8 lines, and is treated as a copy.

agents ai-agents harness wechat weclaws weixin

weather