You are not getting the point of the higher outside temps.
Draft makes the smoke go up. Draft is due to the physics of gases at different temperatures, pressures and heights.
An outside temperature that is higher results in less draft. The large horizontal section results in a need for higher draft to suck the smoke thru this section that has impedance but does not contribute to the draft. Evidently you had borderline draft to start with at lower outside temperature, and with higher temperature you've gone below the necessary draft for the stove to function.
Temperature differential, flue gas temperature, elbows, horizontal runs, weather, wind turbulence all matter. The last two are out of your control. The former not.
Draft makes the smoke go up. Draft is due to the physics of gases at different temperatures, pressures and heights.
An outside temperature that is higher results in less draft. The large horizontal section results in a need for higher draft to suck the smoke thru this section that has impedance but does not contribute to the draft. Evidently you had borderline draft to start with at lower outside temperature, and with higher temperature you've gone below the necessary draft for the stove to function.
Temperature differential, flue gas temperature, elbows, horizontal runs, weather, wind turbulence all matter. The last two are out of your control. The former not.