How to Build a Realtime Wet Bulb Globe Temperature (WBGT) Estimator Using WeatherAPI Fields
WBGT isn’t in your API response — but you can derive a useful estimate from temp, humidity, solar radiation, and wind. Here’s how to build it.
Tutorial
API
Why moon_phase Isn’t Enough: Building Lunar Illumination Estimates from WeatherAPI’s Astronomy Fields
moon_phase strings tell you the phase name, not how bright the sky actually is. Here’s how to derive lunar illumination from WeatherAPI’s astronomy fields.
API
Why vis_km Collapses at Night: Visibility Fields, Sensor Limits, and Building Fog Detection That Actually Works After Dark
Visibility fields in weather APIs behave differently after dark. Here’s why vis_km breaks down at night and how to build fog detection that accounts for it.
API
Why humidity_pct Alone Will Mislead You: Building Evapotranspiration Estimates from WeatherAPI Fields
humidity_pct alone tells you almost nothing about water demand. Here’s how to derive ET₀ estimates from WeatherAPI’s hourly fields — and where the math breaks down.
Tutorial
How to Use epoch Fields Correctly When Stitching History and Forecast Data Together
Combining WeatherAPI history and forecast responses by timestamp? Here’s where epoch fields break, how timezones trap you, and the right way to join them.
API
Why feels_like Temperature Fields Diverge at High Altitude — and How to Detect When They’re Unreliable
feelslike_c can mislead at high elevation. Here’s why wind chill and heat index break down above ~2000m, and how to flag it in your app.
API
Why location= Strings Are Silently Costing You Accuracy (And What to Send Instead)
Passing city names to WeatherAPI? Here’s what actually happens behind the scenes — and why lat/lon coordinates almost always give you better results.
API
Why precip_mm Is Zero When It’s Clearly Raining: Understanding Trace Precipitation and API Thresholds
WeatherAPI returns precip_mm of 0.0 even during light rain. Here’s why trace thresholds exist, what they mean for your logic, and how to handle it correctly.
API
Why weather_alerts Deduplication Is Harder Than It Looks: Event IDs, Polygon Overlap, and What to Actually Store
Weather alert deduplication isn’t just checking IDs. Here’s why alert polygons overlap, IDs reset, and what you actually need to store to avoid duplicate notifications.
API
Why chunksize Matters in GRIB2 Ingestion: Lessons from Processing HRRR at Scale
Processing HRRR and GFS GRIB2 files efficiently isn’t just about parsing — chunk size and field selection decisions dominate real-world ingestion performance.