Hey! This is the Applet you need! With this, at a set time, you can revive a notification with today's forecast. The weather is provided by Weather Underground.
If
Today's weather report
This Trigger retrieves today's current weather report within 5 minutes of the time you specify. NOTE: Pollen count available only in the USA.
Then
Send a notification from the IFTTT app
This action will send a notification to your devices from the IFTTT app.
Explore more great ways to automate Notifications and Weather Underground