I have fished the Terrace area every year in August and last year for the 1st. time in early September, you might find the Steelhead have gone further up the tributaries late in September although every year is different. Last year there were still Steelhead running the Skeena when we were fishing and also up higher in some of the tribs. Coho were also still coming in, Springs, Sockeye and Pinks were done. If I were going later I would look at the Bulkley, Babine and Kispiox, just my opinion maybe a local guy could help you more. You won't regret the trip it is stunning country with some beautiful water. Regarding the weather prepare for hot, cool and rain, you should not get get cold weather yet.What would be the opinion of fishing late September in the Terrace region for steelhead would this be regarded as a good time of the year, would there be any other species to fish for at this time.
Also what's the weather usually like
I totally aggree with CRspeyer.
Go upstream by the end of september and keep in mind that non-resident-anglers are not allowed to fish in the weekends in those rivers!!
Only when you hire an official guide and they are expensive in prime time.
+1 on the busy part, that time of year!You asked about weather, which has been answered yet.
Expect plus 20 degree (celcius), snow, freezing nights and hard rain. There is no such thing as a weather forecast up there, certainly not a consistent one. Don't forget that you're still coastal influenced, and September is beginning to enter the rainy season.
Expect the rivers to blow out, and you won't be disappointed when they do. It's pretty well a guarentee. Staying mobile helps, but every year there is at least one rain event that knocks out everything. The name brand terrace river is particularly susceptible to rain, probably the most likely to blow out of any of the rivers in northern BC.
And despite being pretty "remote" (which is a bit laughable when you actually look at google maps), do not expect solitude. Expect it to be busy. Mid sept to mid oct is prime time and is exceptionally busy