FernWX Lab Mode is a Research Preview, and can be disabled at any time. New sessions will default to the standard FernWX experience.

FernWX example account

Example ledger preview

Create an account to choose locations, set collection frequency, pick weather sources, and build a private forecast history.

Forecast memory
saved per run
Source ranking
measured skill
Raw receipts
audit trail

Start a FernWX account

Track the places you care about, keep a forecast history, and compare what different weather sources said.

The preview uses example data. Your account data appears only after you sign in.
Storage
example
Location
Example Coastal Ridge
Samples
4
Latest telemetry
2:00:00 PM

Service posture

Account email
Sign in to view
Sign-in method
Password; Apple optional
Role
example
Status
signed-out example
Provider
WeatherKit example
Setup
Location, cadence, and source choices
Account data API
/api/account/weatherkit/data

Recent example readings

RetrievedTempHumidityCondition
5/29/2026, 2:00:00 PM16.8°C82 %PartlyCloudy
5/29/2026, 1:45:00 PM16.4°C84 %Cloudy
5/29/2026, 1:30:00 PM16.1°C85 %Cloudy
5/29/2026, 1:15:00 PM15.7°C87 %Drizzle

Example WeatherKit forecast

Hourly
ValidTempPrecipCondition
5/29/2026, 3:00:00 PM17.0°C20 %PartlyCloudy
5/29/2026, 4:00:00 PM17.7°C28 %Drizzle
5/29/2026, 5:00:00 PM18.4°C36 %PartlyCloudy
5/29/2026, 6:00:00 PM19.1°C44 %Drizzle
5/29/2026, 7:00:00 PM19.8°C52 %PartlyCloudy
5/29/2026, 8:00:00 PM20.5°C60 %Drizzle
Daily
ValidTempPrecipCondition
5/30/2026, 2:00:00 PM18.0°C20 %PartlyCloudy
5/31/2026, 2:00:00 PM19.0°C28 %Drizzle
6/1/2026, 2:00:00 PM20.0°C36 %PartlyCloudy
6/2/2026, 2:00:00 PM21.0°C44 %Drizzle
6/3/2026, 2:00:00 PM22.0°C52 %PartlyCloudy

Example WeatherKit alerts

Example advisory for exposed ridges
minor · expected · likely