My Rules;
ALWAYS dry conditions departure to destination.
If probability of precipitation is above 25% enroute probably no-go.
Driving in rain ruins the day and can be precarious with fatty tires.
If things go sideways I carry a plastic one-and-done car cover
from California Car Covers $15.00 (Cobra takes the smallest one).
https://www.calcarcover.com/product/...car-cover/1566
These covers come in a plastic pouch that take up about 1/2 shoe box in space.
Weather resources include:
Weatherunderground.com
Gives chance of precipitation for each hour of the day + 10 day forecast.
Skyvector.com
Aviation weather site but has real-time weather radar animation.
From your phone you can predict location or avoid areas of rain and T-storms.
Having access to weather radar gives you an edge at staying dry.
Retired 30+ year professional pilot and weather observer.
Weather Tip:
If you think crap weather is brewing, put your back to the wind and point left
arm straight out. The direction you point is toward the center of low pressure.
Low pressure = bad weather juju.