OpenWeatherMap

This notebook goes over how to use the OpenWeatherMap component to fetch weather information.

First, you need to sign up for an OpenWeatherMap API key:

1. Go to OpenWeatherMap and sign up for an API key here
2. pip install pyowm

Then we will need to set some environment variables:

1. Save your API KEY into OPENWEATHERMAP_API_KEY env variable

Use the wrapper

import os

from langchain_community.utilities import OpenWeatherMapAPIWrapper

os.environ["OPENWEATHERMAP_API_KEY"] = ""

weather = OpenWeatherMapAPIWrapper()

API Reference:OpenWeatherMapAPIWrapper

weather_data = weather.run("London,GB")
print(weather_data)

In London,GB, the current weather is as follows:
Detailed status: broken clouds
Wind speed: 2.57 m/s, direction: 240°
Humidity: 55%
Temperature: 
  - Current: 20.12°C
  - High: 21.75°C
  - Low: 18.68°C
  - Feels like: 19.62°C
Rain: {}
Heat index: None
Cloud cover: 75%

Use the tool

import os

from langchain.agents import AgentType, initialize_agent, load_tools
from langchain_openai import OpenAI

os.environ["OPENAI_API_KEY"] = ""
os.environ["OPENWEATHERMAP_API_KEY"] = ""

llm = OpenAI(temperature=0)

tools = load_tools(["openweathermap-api"], llm)

agent_chain = initialize_agent(
    tools=tools, llm=llm, agent=AgentType.ZERO_SHOT_REACT_DESCRIPTION, verbose=True
)

API Reference:AgentType | initialize_agent | load_tools | OpenAI

agent_chain.run("What's the weather like in London?")

> Entering new AgentExecutor chain...
 I need to find out the current weather in London.
Action: OpenWeatherMap
Action Input: London,GB
Observation: In London,GB, the current weather is as follows:
Detailed status: broken clouds
Wind speed: 2.57 m/s, direction: 240°
Humidity: 56%
Temperature: 
  - Current: 20.11°C
  - High: 21.75°C
  - Low: 18.68°C
  - Feels like: 19.64°C
Rain: {}
Heat index: None
Cloud cover: 75%
Thought: I now know the current weather in London.
Final Answer: The current weather in London is broken clouds, with a wind speed of 2.57 m/s, direction 240°, humidity of 56%, temperature of 20.11°C, high of 21.75°C, low of 18.68°C, and a heat index of None.

> Finished chain.

'The current weather in London is broken clouds, with a wind speed of 2.57 m/s, direction 240°, humidity of 56%, temperature of 20.11°C, high of 21.75°C, low of 18.68°C, and a heat index of None.'

Related

• Tool conceptual guide
• Tool how-to guides