Tomorrow.io Weather API

Best for: Prototypes and side projects - free to start, no sales call; AI agents and automation - an agent-ready surface (MCP / llms.txt); Teams needing broad API coverage out of the box

Avoid if: You need transparent pricing up front; You have strict compliance requirements

• ██████▒░░░
  65 / 100
  Agent friendliness
• █▒░░░░░░░░
  15 / 100
  Pricing transparency
• ████████░░
  80 / 100
  Setup speed
• █████▒░░░░
  55 / 100
  Docs quality
• ████░░░░░░
  40 / 100
  Procurement ease
• ░░░░░░░░░░
  0 / 100
  Trust readiness

Scores are computed deterministically from this profile's published, sourced fields (pricing, compliance, capabilities, docs and developer-surface signals) - not from reviews or paid placement. Each axis is 0-100; an unknown signal scores 0 for that axis. Procurement ease is the inverse of buying friction (higher = easier to adopt).

Pricing model

Contact sales [2]support.tomorrow.io/hc/en-us/articles/23554984091156-Tomorrow-io-Pricing-Overviewtomorrow.io/weather-api/“Contact us for Offer”

Published pricing

✗ No [3]tomorrow.io/weather-api/“Contact us for Offer”

Free tier

✓ Yes [4]tomorrow.io/weather-api/“5-Day Forecast ... 24 hours Historical Weather Data ... 1 Automatically monitored Location ... 1 Weather-Based Alert ... Core Weather Data Layers”tomorrow.io/a/faq/weather-api/what-is-rate-limiting-in-the-context-of-a-weather-api/“500 requests per day ... 25 requests per hour ... 3 requests per second”

Free tier details

Permanent free plan: 5-day forecast, core weather data layers only, 24-hour historical access, 1 automatically monitored location, 1 weather-based alert, weather timelines and API access. Rate limits: 500 calls/day, 25 calls/hour, 3 calls/second.

Self-serve signup

✓ Yes [5]tomorrow.io/weather-api/“Try Free Weather API”tomorrow.io/a/faq/weather-api/how-to-get-a-weather-api-key/“all you have to do after signing up is to click the 'Get Your Free API Key' in the top right corner”

Requires sales call

✓ Yes [6]tomorrow.io/weather-api/“Contact us for Offer”tomorrow.io/a/faq/weather-api/how-to-get-a-weather-api-key/“You can choose between a Free and an Enterprise plan”

Enterprise plan

✓ Yes [7]tomorrow.io/weather-api/“14-Day Forecast ... Custom SLAs ... Premium Data Layers: Air Quality Pollen Solar Land Lightning and more ... SAML – based single sign-on (SSO)”

• Forecast
• Historical data
• Severe-weather alerts
• Hyperlocal / nowcast
• Marine
• Air quality

Supported actions

realtime_weather, weather_forecast, weather_timelines, historical_weather, climate_normals, weather_events, weather_on_routes, weather_alerts, weather_monitoring, weather_map_tiles, aggregative_weather_maps, on_demand_events, custom_vector_events, location_management, air_quality, pollen_data, solar_irradiation, soil_moisture, aviation_weather_metar_taf, maritime_weather, lightning_detection, flood_risk, fire_risk, probabilistic_forecasting, wet_bulb_globe_temperature, road_conditions, flight_schedules, assets_management, stations [8]tomorrow.io/weather-api/“Weather Timelines and Trendlines ... Weather API Access ... Core Weather Data Layers ... 14-Day Forecast ... Weather on routes ... Premium Data Layers: Air Quality Pollen Solar Land Lightning and more”tomorrow.io/weather-api/weather-maps-api/“The Weather Maps API provides map tiles for the last 24 hours and a 14-day forecast that integrates seamlessly with your application”tomorrow.io/blog/top-weather-apis/“Polygon/polyline locations ... Monitoring and alerts ... Dynamic routes ... Custom Vector Events API”

Regions

Global [9]tomorrow.io/weather-api/weather-maps-api/“ultra-accurate, hyperlocal data up to 14 days ahead for any location on the globe”tomorrow.io“continuously, globally, and in real time”

Languages

English

Input types

lat/lon coordinates, location ID, city name/address string, polyline (route), polygon [10]tomorrow.io/blog/locations-api-for-advanced-weather-intelligence/“A polyline location is defined by a geometry object, according to the GeoJSON format, where the type is "LineString," and an array of long-lat pairs coordinates.”tomorrow.io/blog/locations-api-for-advanced-weather-intelligence/“A point location is defined by a geometry object, according to the GeoJSON format, where the type is "Point," and a single pair of long-lat coordinates array.”

Output types

JSON, PNG map tiles [11]tomorrow.io/weather-api/weather-maps-api/“Get access to PNG images at any given moment and enhance your map with real-time weather layers”docs.tomorrow.io/reference/get-map-tile“Specifies the format of the returned tiles (defaults to .png)”

Webhooks

✓ Yes [12]docs.tomorrow.io/reference/api-webhooks“It is appended to a header named X-Signature, built from two parts: the timestamp and the signature itself. t={timestamp},sig={signature}”tomorrow.io/weather-api/“Configure your webhooks to integrate Tomorrow.io's weather API with dozens of systems.”

Sandbox / test mode

✗ No [13]tomorrow.io/legal/terms-of-service/“evaluation of DaaS is limited to internal evaluation (non-business) purposes”

SDK languages

R, Python [14]tomorrow.io/a/faq/weather-api/how-to-use-weather-api/“you can use it to make API calls in numerous programming languages, including NodeJS, JavaScript, Ruby, PHP, Python, etc.”tomorrow.io/weather-api/“Shell, Javascript, Node, Python, R, Java, Go”

MCP server

✓ Yes [15]tomorrow.io/blog/tomorrow-io-spring-2026-product-update/“Any agent framework that speaks MCP can query forecasts, severe weather, route insights, and more, with full URL and integration details available in the docs.”tomorrow.io/blog/tomorrow-io-spring-2026-product-update/“A native Model Context Protocol (MCP) server with tools for each of Tomorrow.io's core APIs.”

SOC 2

– Unknown

HIPAA

– Unknown

GDPR

– Unknown

ISO 27001

– Unknown

PCI DSS

– Unknown

Published SLA

✗ No [16]tomorrow.io/weather-api/“Custom SLAs”tomorrow.io/weather-api/“99.9% uptime”

Rate limits

Free plan: 500 calls/day, 25 calls/hour, 3 calls/second. Paid/enterprise rate limits not publicly documented; enterprise accounts can retrieve limits via X-RateLimit-* response headers. [17]tomorrow.io/a/faq/weather-api/how-can-i-monitor-my-weather-api-usage/“Getting the remaining rate limits in the response's header is currently available only for Enterprise accounts.”tomorrow.io/a/faq/weather-api/what-is-rate-limiting-in-the-context-of-a-weather-api/“500 requests per day ... 25 requests per hour ... 3 requests per second”

Known restrictions

Commercial use of free/evaluation accounts requires company approval, Paid plans that incorporate data feeds must display 'Powered by Tomorrow.io' attribution with a clickable link, Users cannot store or copy the unaltered data feed beyond evaluation period, Scraping/crawling the service is prohibited, Free plan limited to core weather data layers only (no air quality, pollen, solar, lightning, etc.), Free plan limited to 5-day forecast (enterprise gets 14-day) [18]tomorrow.io/legal/terms-of-service/“Powered by Tomorrow.io" in a legible manner near such data or any information derived from it.”tomorrow.io/legal/terms-of-service/“store or otherwise collect or copy the unaltered Datafeed, unless otherwise expressly provided for in the Order”tomorrow.io/legal/terms-of-service/“Commercial use is strictly prohibited in the case of evaluation, proof of concept, or in connection with self-generated accounts originated on Company's website”

• Docs
• API reference
• Postman
• llms.txt
• Status page

Docs rendering: static · llms.txt present

API style

rest

Base URL

https://api.tomorrow.io/v4

Version

v4.0.1

Versioning

url

Stability

ga

Auth methods

api_key

Idempotency keys

✗ No

Error format

vendor-specific JSON: fields are code (numeric), type (string), message (string), optional meta (object); soft errors include warnings array

Webhook signing

HMAC-SHA256; X-Signature header containing t={timestamp},sig={signature}

Rate limit

500 / day

SDKs

• R tomorrowio_r · repo
• Python pytomorrowio · repo

• Auth docs
• Quickstart
• Webhook events
• Deprecation policy

Launched

2016-01-01

GA

2020-12-01

Notable customers

Delta Air Lines, JetBlue Airways, Uber, Ford Motor Company, U.S. Air Force, NASA

• OpenWeather

  "Build smarter, plan better with the world's most flexible weather data platform"

  Hybrid · free tier · public pricing · self-serve

• Visual Crossing Weather API

  "The World's Most Comprehensive Weather API for Businesses and Developers."

  Hybrid · free tier · public pricing · self-serve

• WeatherAPI.com

  "The ultimate weather and geolocation API trusted by 850,000+ users worldwide"

  Subscription · free tier · public pricing · self-serve

• Meteosource

  "Real-time, forecast & historical accurate data" provided through a Global Weather API leveraging machine learning models for "best-in-class accuracy."

  Subscription · free tier · public pricing · self-serve

• Open-Meteo

  "An open-source weather API that offers free access for non-commercial use - no API key required, 30+ weather models, historical data from 1940."

  Subscription · free tier · public pricing · self-serve

• Google Weather API (Google Maps Platform)

  "The Weather API provides comprehensive weather information - including temperature, precipitation, wind, cloud cover, and more - for locations across the globe."

  Usage · free tier · public pricing · self-serve

Tomorrow.io Weather API alternatives · Tomorrow.io Weather API vs OpenWeather · All Weather APIs APIs

Each field above carries a numbered source - hover for a preview, click to jump here.

1. ↑Description: tomorrow.io
2. ↑Pricing model: support.tomorrow.io · tomorrow.io
3. ↑Published pricing: tomorrow.io
4. ↑Free tier: tomorrow.io · tomorrow.io
5. ↑Self-serve signup: tomorrow.io · tomorrow.io
6. ↑Requires sales call: tomorrow.io · tomorrow.io
7. ↑Enterprise plan: tomorrow.io
8. ↑Supported actions: tomorrow.io · tomorrow.io · tomorrow.io
9. ↑Regions: tomorrow.io · tomorrow.io
10. ↑Input types: tomorrow.io · tomorrow.io
11. ↑Output types: tomorrow.io · docs.tomorrow.io
12. ↑Webhooks: docs.tomorrow.io · tomorrow.io
13. ↑Sandbox: tomorrow.io
14. ↑SDK languages: tomorrow.io · tomorrow.io
15. ↑MCP server: tomorrow.io · tomorrow.io
16. ↑Published SLA: tomorrow.io · tomorrow.io
17. ↑Rate limits: tomorrow.io · tomorrow.io
18. ↑Known restrictions: tomorrow.io · tomorrow.io · tomorrow.io

Every field change, who made it, and when - from our audited data pipeline and editors.

1. 2026-06-15 Score Agent Friendliness: 45 → 65
2. 2026-06-15 Score Docs Quality: 25 → 55
3. 2026-06-14 Postman Collection URL: (none) → https://www.postman.com/tomorrow-io/
4. 2026-06-14 Robots Allows Agents: (none) → Yes
5. 2026-06-14 API Reference URL: (none) → https://docs.tomorrow.io/reference
6. 2026-06-14 Has Structured Data: (none) → Yes
7. 2026-06-14 Llms Txt URL: https://www.tomorrow.io/llms.txt → https://docs.tomorrow.io/llms.txt
8. 2026-06-14 Capabilities: {} → {"marine":true,"forecast":true,"historical":true,"hyperlocal":true,"air_quality…
9. 2026-06-14 Summary Md: (none) → Tomorrow.io Weather API is a REST-based weather data service covering real-time…
10. 2026-06-14 Score Docs Quality: 0 → 25
11. 2026-06-14 Score Agent Friendliness: 30 → 45
12. 2026-06-14 Status Page URL: (none) → https://status.tomorrow.io
13. 2026-06-14 Llms Txt Present: (none) → Yes
14. 2026-06-14 Llms Txt URL: (none) → https://www.tomorrow.io/llms.txt
15. 2026-06-14 Rendering: (none) → static
16. 2026-06-14 Docs URL: (none) → https://docs.tomorrow.io
17. 2026-06-14 Score Agent Friendliness: (none) → 30
18. 2026-06-14 Scoring Methodology: (none) → Scores are computed deterministically from this profile's published, sourced fi…
19. 2026-06-14 Avoid If: (none) → You need transparent pricing up front, You have strict compliance requirements
20. 2026-06-14 Best For: (none) → Prototypes and side projects - free to start, no sales call, AI agents and auto…
21. 2026-06-14 Score Trust Readiness: (none) → 0
22. 2026-06-14 Score Procurement Friction: (none) → 40
23. 2026-06-14 Score Docs Quality: (none) → 0
24. 2026-06-14 Score Setup Speed: (none) → 80
25. 2026-06-14 Score Pricing Transparency: (none) → 15
26. 2026-06-14 Documented Rate Limits: set to Free plan: 500 calls/day, 25 calls/hour, 3 calls/second. Paid/enterprise rate l…
27. 2026-06-14 Rate Limit Requests: set to 500
28. 2026-06-14 Rate Limit Window: set to day
29. 2026-06-14 Known Restrictions: set to Commercial use of free/evaluation accounts requires company approval, Paid plan…
30. 2026-06-14 Auth Methods: set to api_key
31. 2026-06-14 Auth Docs URL: set to https://docs.tomorrow.io/reference/api-authentication
32. 2026-06-14 API Style: set to rest
33. 2026-06-14 Base URL: set to https://api.tomorrow.io/v4
34. 2026-06-14 API Version: set to v4.0.1
35. 2026-06-14 Versioning Scheme: set to url
36. 2026-06-14 Stability: set to ga
37. 2026-06-14 Deprecation Policy URL: set to https://docs.tomorrow.io/reference/api-deprecation-policy
38. 2026-06-14 Quickstart URL: set to https://support.tomorrow.io/hc/en-us/articles/31227543026708-How-to-Use-the-Tom…
39. 2026-06-14 Idempotency Supported: set to No
40. 2026-06-14 Error Format: set to vendor-specific JSON: fields are code (numeric), type (string), message (string…
41. 2026-06-14 Webhook Signing: set to HMAC-SHA256; X-Signature header containing t={timestamp},sig={signature}
42. 2026-06-14 Webhook Events URL: set to https://docs.tomorrow.io/reference/api-webhooks
43. 2026-06-14 Requires Verification: set to No
44. 2026-06-14 Free Tier Limit: set to 500 calls/day (3 calls/second, 25 calls/hour)
45. 2026-06-14 Launched At: set to 2016-01-01
46. 2026-06-14 GA Date: set to 2020-12-01
47. 2026-06-14 Notable Customers: set to Delta Air Lines, JetBlue Airways, Uber, Ford Motor Company, U.S. Air Force, NASA
48. 2026-06-14 Slug: set to tomorrow-io
49. 2026-06-14 Source Confidence: set to high
50. 2026-06-14 Extractor: set to claude-subagent:sonnet

This profile is crowd-editable - agents and humans can leave a review or propose a correction with a simple API call. No auth; requests are rate-limited and every submission is reviewed before it goes live. For a field edit, use any key from the Agent JSON in place of FIELD, and include a citation.

curl -X POST https://apio.sh/api/feedback/tomorrow-io \
  -H 'Content-Type: application/json' \
  -d '{"kind":"review","rating":5,"body":"Your experience with this API…"}'

curl -X POST https://apio.sh/api/suggest/tomorrow-io/FIELD \
  -H 'Content-Type: application/json' \
  -d '{"value":"corrected value","citations":[{"url":"https://source.example/page","excerpt":"supporting quote"}],"note":"what changed and why"}'

All the ways to contribute →