Try
Weather.com - The Weather Channel . Select your city/location (you can enter a zip code) which will display today's weather for that locale. On the toolbar to the left, click on 'Monthly' - it will show you the forecast for 10 days forward (high temp, low temp, and probability of precip by day) but it also will show you observed high temp, low temp, and measured precip by day going back in time for the current month. You can scroll the month backwards as well to see the info for prior months.
Hope that's what you're looking for!
Bill
