Rain isn't necessarily a good thing, I've brought this up a few times in the last couple of Septembers.

Even with the low and clear water condition, some coho salmon do make their way up the river, enough to provide a good yet challenging fishery.

In the past, the fish just rush straight up as soon as the first rain falls, resulting in a shorter fishery timeframe. Last year, we were doing just fine from mid to late September until the first rainfall took place on September 29th. On September 29th, we we able to intercept a good run of coho and chinook salmon. September 30th was a write-off as the water was high and coloured.
Same thing happened in 2004. We had really really fantastic days of fishing from late September until the first week of October, with some days producing a dozen good sized coho salmon. The first heavy rainfall came on October 8th. I caught my biggie around mid afternoon that day and the river was blown out a few hours later.

It didn't recover until October 20th or so, by then the coho salmon season was coming to an end for the Chilliwack River.
2003...

The big flood. The fishing was challenging in late September and the first week of October because of low water condition, but the fish were there. The big rainfall came on October 12th. We had fantastic fishing on October 10th, 11th and part of 12th. After the 12th, it was done for the season as the river remained extremely high and dirty for weeks.
Rain anyone?
