I can give you some specific information as of this weekend, but not specifically on Cedar Spring. I did an overnight this weekend in the San Jacinto Wilderness area.
Most peaks in the range have snow on the north facing peaks from around 7,000 feet. Other peaks have snow in the shaded areas from around 7,000 feet. South facing peaks generally have no snow until 9,000 feet. Snow is about 1 foot in lower areas. There is some snow from 8,000 - 8,500 in most areas; around 1 foot. 8,500 and higher has 3 feet or more. Most snow is hard packed ice (unless warmed in the afternoon). Micro spikes or crampons needed in am or pm; snow shoes not required.
Temps vary, check your weather forecast. Early last week highs in the 50's lows to about 30 in upper elevations. This weekend highs around 32 lows in the 20's; with gusts up to 50 mph.
Right now the PCT from Hwy 74 to Cedar Spring should have no (or little) snow. The Cedar Spring trail faces south, so probably no snow except for shaded areas. Cedar Spring itself is very shaded.
Hope this helps.