Skip to main content

OpenWeatherMap API

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​

from langchain.utilities import OpenWeatherMapAPIWrapper
import os

os.environ["OPENWEATHERMAP_API_KEY"] = ""

weather = 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​

from langchain.llms import OpenAI
from langchain.agents import load_tools, initialize_agent, AgentType
import os

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
)
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.'