Yandex.Weather Getting Started: API Key & First Request (2026)

Getting started overview

Integrating the Yandex.Weather API involves a sequence of steps designed to provide developers with access to weather data for various applications. This guide outlines the process from account creation and API key acquisition to making an initial request and addressing common issues. The Yandex.Weather API offers current weather conditions, daily forecasts, and hourly forecasts for specified geographical coordinates. Access is managed through an API key, which must be included in each request for authentication.

The core process includes registering a Yandex account, activating the Weather API service, and generating a unique API key. Once the key is obtained, developers can construct HTTP GET requests to the API endpoint, specifying parameters such as latitude, longitude, and language. Responses are typically returned in JSON format, facilitating integration into web and mobile applications.

Yandex.Weather provides a free tier that allows up to 1000 requests per day, suitable for initial development and testing. For higher volumes, paid tiers are available, starting at 1000 RUB per month for 2000 requests per day. Developers should review the official Yandex.Weather API documentation for the most current information regarding usage policies, endpoints, and data models.

Getting started quick reference

Create an account and get keys

To begin using the Yandex.Weather API, you need a Yandex account and an activated API key. This key acts as your credential for all API interactions.

1. Register or log in to Yandex

1. Navigate to the Yandex homepage.
2. If you do not have an account, click the 'Register' button and follow the prompts to create one. This typically involves providing an email address or phone number and setting a password.
3. If you already have a Yandex account, log in using your existing credentials.

2. Activate the Weather API service

After logging in, you must activate the Weather API service for your account:

1. Go to the Yandex.Weather Developer Documentation page.
2. Look for a section or link related to 'Connecting the API' or 'Getting an API Key'. The interface is primarily in Russian, so you may need to use browser translation features.
3. Follow the instructions to activate the Weather API. This usually involves agreeing to terms of service and confirming your intent to use the API.

3. Generate your API key

Once the service is activated, you can generate your API key:

1. Within the Yandex.Developer Dashboard (accessible after activating the service), locate the section for API keys or credentials.
2. Click the button to generate a new API key. The system will provide a unique string of characters.
3. Securely store this API key. It grants access to your API usage and should not be exposed publicly in client-side code or version control. Treat it like a password.

Your first request

With your API key in hand, you can now make your first request to the Yandex.Weather API. This example demonstrates how to fetch weather data for a specific location using a simple cURL command or Python script.

API endpoint

The primary endpoint for fetching weather forecasts is https://api.weather.yandex.ru/v2/forecast. For a detailed overview of available endpoints and parameters, consult the Yandex.Weather API reference.

Required parameters

• lat: Latitude of the desired location (e.g., 55.75396).
• lon: Longitude of the desired location (e.g., 37.620393).
• lang: Language of the response (e.g., 'en_US' for English, 'ru_RU' for Russian).

Authentication

The API key must be passed in the X-Yandex-API-Key HTTP header for every request.

Example request: cURL

Replace YOUR_API_KEY with the actual API key you obtained.

curl -H "X-Yandex-API-Key: YOUR_API_KEY" \
     "https://api.weather.yandex.ru/v2/forecast?lat=55.75396&lon=37.620393&lang=en_US"

Example request: Python

This Python example uses the requests library to make the API call and print the JSON response.

import requests
import json

api_key = "YOUR_API_KEY" # Replace with your actual API key
latitude = 55.75396
longitude = 37.620393
language = "en_US"

url = f"https://api.weather.yandex.ru/v2/forecast?lat={latitude}&lon={longitude}&lang={language}"
headers = {
    "X-Yandex-API-Key": api_key
}

try:
    response = requests.get(url, headers=headers)
    response.raise_for_status()  # Raise an exception for HTTP errors (4xx or 5xx)
    weather_data = response.json()
    print(json.dumps(weather_data, indent=2))
except requests.exceptions.RequestException as e:
    print(f"An error occurred: {e}")
except json.JSONDecodeError:
    print("Failed to decode JSON response.")
    print(response.text)

Interpreting the response

A successful response will return a JSON object containing various weather data points, including current conditions, hourly forecasts, and daily forecasts. The structure of the JSON response is detailed in the Yandex.Weather API reference. Key fields often include fact (current weather), forecasts (daily forecasts), and hourly (hourly forecasts).

Common next steps

After successfully making your first request, consider these common next steps to further integrate Yandex.Weather into your application:

• Error Handling: Implement robust error handling for various API responses, including rate limiting (HTTP 429), authentication failures (HTTP 401), and invalid requests (HTTP 400). The Mozilla Developer Network HTTP status codes documentation provides a general reference for common HTTP error types.
• Rate Limiting: Be aware of the API's rate limits (e.g., 1000 requests per day for the free tier). Implement caching strategies or request throttling to stay within these limits and optimize performance.
• Parameter Exploration: Experiment with other available parameters, such as limit for forecast depth or extra for additional data fields, to retrieve the specific weather information your application requires.
• Data Parsing and Display: Develop logic to parse the JSON response and display the weather data in a user-friendly format within your application.
• Security: Ensure your API key is never exposed on the client-side. For web applications, all API calls should ideally be proxied through your backend server to protect your key.
• Upgrade Plan: If your application requires more than 1000 requests per day, review the Yandex.Weather pricing plans and upgrade to a suitable paid tier.

Troubleshooting the first call

Encountering issues with your initial API call is common. Here are some troubleshooting steps:

• Check API Key: Double-check that your API key is correct and included in the X-Yandex-API-Key header. A common mistake is a typo or an expired/deactivated key.
• Verify Endpoint and Parameters: Ensure the API endpoint URL is correct (https://api.weather.yandex.ru/v2/forecast) and that all required parameters (lat, lon, lang) are present and correctly formatted.
• Review HTTP Status Codes:
  • 401 Unauthorized: Indicates an issue with your API key. Confirm it's correct and active.
  • 400 Bad Request: Suggests an issue with your request parameters (e.g., invalid latitude/longitude, missing required parameters).
  • 429 Too Many Requests: You have exceeded your rate limit. Wait for the limit to reset or consider upgrading your plan.
  • 5xx Server Error: An issue on the Yandex.Weather server side. These are typically temporary; try again later.
• Network Connectivity: Confirm your development environment has an active internet connection and no firewall rules are blocking outgoing requests to api.weather.yandex.ru.
• Consult Documentation: Refer to the Yandex.Weather API documentation for specific error codes and their meanings. The documentation, while primarily in Russian, provides authoritative details on API behavior.
• Use a Tool like Postman: If you're having trouble with your code, try making the request using a dedicated API client like Postman or Insomnia. This can help isolate whether the issue is with your code or the API call itself.