Hi !

here is my feedback on how temperature acts upon our fuel consumption !
The data come form my daily records when I go to work and I get back home : temperature, wind speed and direction, fuel consumption, time travel, traffic conditions and the distance is allways the same : about 13.5 miles. And, very important, the motor at the begining of the ride is cold ! The car used for the test is Civic Hybrid 2008.

So, as you can see on this graph, for a short distance, the lower the temperature (°C) is, the higher the consumption is.

I note that if the motor is hot at the begining of the ride, even for short distances, my MPG is lower than if it would cold.