I may have what you need. I have a friend in San Diego that sends me whiny texts whenever it rains - like it's some biblical plague. Send me your number and I will have him add you to his send list.
Anyhow, I check the Weather Underground app on my phone in the evening to figure out what the temp will be on my morning commute. This takes 15 seconds. If it looks like the 3 day forecast is not likely to vary, I won't check again for a few days (in SoCal, you could probably do this once a week). If rain is predicted, I check the Doppler radar map when I get up - this allows me to time the rain-free windows.