Heidlberg said: I'm in redlands ca, but not sure what zone that is.
Peppers, I don't know from Adam, but it looks like the USDA would say "9b" but PlantMaps would say "9a".
So depending on how many years of data you look at, and how recently the data runs, and your local micro-climate, an average year would dip below 20, 25 or 30 F at least once.
http://www.plantmaps.com/92373
"Zip code 92373, Redlands CA is in USDA Hardiness Zone 9b: 25F to 30F.
Using updated climate data through 2010, 92373 is in the Plantmaps Hardiness Zone 9a: 20F to 25F.
The average first frost in 92373 is between December 1 - 10, while the average last frost occurs between February 11 - 20."