I have designed some satellite microwave PA, and the thermal ranges were -20C to +70C, but yes, not even an industrial temperature range.

The biggest issue is getting heat out, though my module was on a cold plate and I doubt it was ever cycled to those ranges.

The concern was keeping output power and current within spec over those ranges; getting enough output power (within distortion specs) at hot, and keeping the current under spec at cold (so as not to trip a breaker).