How to Interpret pressure_mb Changes Over Time: Building a Storm Approach Detector
Raw pressure_mb values aren’t useful alone. Learn how to use rate-of-change logic on WeatherAPI forecast data to detect approaching storms before they arrive.
API
API
How to Detect Fog Programmatically: Using Visibility, Dew Point Spread, and Condition Codes Together
Fog detection via weather API is trickier than it looks. Here’s how to combine visibility, dew point spread, and condition codes reliably in your app.
API
Condition Codes vs. Raw METAR: Why You Should Stop Treating Them as Equivalent
WeatherAPI condition codes are not a direct METAR passthrough. Here’s what the mapping actually does, where it loses fidelity, and when raw data matters.
API
Humidity Is Not Humidity: vapor_pressure_deficit and why absolute humidity changes what your app should do
Relative humidity alone misleads. Here’s how to derive VPD and absolute humidity from WeatherAPI data, and when each one actually matters for your use case.
API
How to Build a Hyper-Local Heat Stress Index Using WeatherAPI’s Hourly Forecast
Build a real-time heat stress index from WeatherAPI hourly data using WBGT approximation, humidity, and solar load — with working Python code.
API
Wind Direction Fields in Weather API Responses: Why wind_dir and wind_degree Aren’t Always Telling You the Same Thing
wind_dir and wind_degree look redundant until they disagree. Here’s what each field actually represents and how to use both without getting burned.
API
What feelslike_c Actually Calculates — and When to Stop Trusting It
WeatherAPI’s feelslike_c blends wind chill and heat index — but the thresholds and edge cases matter. Here’s what’s actually being calculated and where it breaks.
API
Snow vs. Rain in the API Response: Why precip_type Gets It Wrong Near the Freezing Line
precip_type looks simple until you’re near 0°C. Here’s why the field misleads, when to distrust it, and what to cross-check it against.
API
Solar Radiation and Cloud Transmissivity: What WeatherAPI Actually Gives You and How to Use It
WeatherAPI returns solar radiation data — but what does it actually measure, where does it come from, and how should you use it in real applications?
API
How to Cache Weather API Responses Without Serving Stale Data at the Wrong Moment
Caching weather API responses saves money and reduces latency — but done wrong, it serves stale forecasts at exactly the wrong time. Here’s how to get it right.