So pure propane gas should not cause any problems even at moderate frost, because the boiling point of propane gas is much lower than that of butane gas. Well, we must not forget that the gas in the bottle is of course under pressure. And of course the performance gets lower with lower temperatures. I have had very good experiences with the various gas mixtures that are available in the small camping gas cartridges. Even in significant frost or altitudes around 4,000m or 13,000ft absout no problems with, for example, the so-called 3 seasons gas, a mixture of different gases made. If that is no longer enough, I take for the colder days, the so called winter gas cartridges, which also have a kind of fabric inside that ensures a better volatilization of the gas. Attention: from my experience you have with these gases a significantly higher consumption at warm temperatures.