A.,
I grew up in the Bay Area and went to college at Santa Clara never imagining I'd end up in the Sacramento area. I loved living in the country outside of Auburn for 13 years but now live in Fair Oaks, a town adjacent to Sacramento, and have been in town 6 years now. In this area the cities and towns run together with area that is 'county' land. It is sometimes difficult to know where one starts and another ends.
Right now the choice of a school wouldn't be that important due to your son's age. If you plan to purchase property (and now is an excellent time to do so), you should still seriously consider renting for a minimum of 6-months while you get the lay of the land. There are several parts of town that are run-down and have more serious crime issues. Other parts are nice but the traffic patterns are a real problem depending on which side of town you live and work in. If your husband is in law enforcement (mine was), you should consider looking outside the city or the county where he will be working to put some distance between his job and homelife.
You should also know that the Sacramento area has the most diverse population in the country. So there are parts of town that seem to be more ethnically specific - it isn't really an issue, but it might be important. Housing in the greater Sacramento area runs from 800 square foot bungalows to multi-story mansions on acerage. There is no 'average' home here, though there are average/more traditional neighborhoods, especially with some of the newer developments. With two big rivers, parts of Sacramento are also in a flood plan and other parts are bordered by a wonderful, multi-mile, multi-use parkway that follows the river.
Today it is 105 degrees, and it has actually been a pretty mild summer with only a handful of days over 100 (and almost no humidity). Some summers we have 30 or more days over 100 and the reality is that, while you may never like the heat, you do get used to it and everyone has air-conditioning in their homes, offices and vehicles.
There are lots and lots of parks, libraries and things to do for young families. There is a wonderful downtown area that is gaining strength and vitality, including a neat "2nd Saturday" program that promotes the arts and brings lots of folks to the downtown and midtown area. Downtown and midtown are very walkable. There is Sacramento State University and 2 different junior colleges in the area, put UC Davis just a short drive away - so lots of educational opportunities too.
Try this site for the Sacramento Convention and Visitors Bureau - http://www.sacramentocvb.org Try this one for county information - http://www.saccounty.net/default.htm Try this one for Sacramento City information - http://www.cityofsacramento.org
Good luck - J.