According to the USDA Santa Clara is in USDA Zone 8a. Here is some general info for USDA Zone 8a to help you get started.
| Average Date of Last Frost (spring) | March 15 | 
| Average Date of First Frost (fall) | November 15 | 
| Lowest Expected Low | 10°F | 
| Highest Expected Low | 15°F | 
This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.
You can view the USDA Zone map for Utah here:
Below is a list of planting guides for Santa Clara, UT. These guides are based on data from Zone 8a.
 
Vegetables
Herbs
Flowers