www.weather.gov
What you do is go to this site, and then type your zip code in it. It then brings up your weekly forecast, supposedly pinpointed to the post office at that zip code.
There is a map that shows up on the right side.
Click where your house and garden is in the map, and it reloads to your exact location with a one square mile center.
If you do it a lot through the course of a year or so, and keep track of how close their forecast is for your precise location, you can then know your microclimate better than the weather service does.
I've been doing it several years now, about 5 years or so, and I know that when there is water in the lake during winter, my actual low temps will be 10 to 15 degrees warmer than what it says they will be. (The other side of Orchid hill gets the temps they forecast.) But when the lake is low in winter, the low forecast temps will be close to what they predict.
Also, I've found that 20% chance of showers means that if it sprinkles on a flat stone, it will not get completely wet.
20% chance of rain means the flat stone will barely get completely wet.
80% chance of rain means 100%, and we'll get a quarter inch. 100% chance of rain means it's going to rain hard.
But at your particular place you'll come up with different assesments. (ok spell check, how do you spell assessments?) 2 ss's twice? Okay.