SSP

Some information I came across:

The optimum temperature for growth is 87 to 89 degrees F (31 or 32°C).
Temperature also influences the arrangement of the leaves.
On plants growing under cool conditions the leaves are more upright, but under warmer conditions they are more horizontal.
While the rate of plant development (for any given variety) is slower in the subtropics than in the tropics, bunch size can be larger and yields are comparable.

FRUIT GROWTH
A bunch emerging in April takes six months or more to mature, while one emerging in November takes only three months. So temperature has a big influence on the rate of fruit growth, hence the use of bunch covers, which are thought to warm the fruit, thereby increasing growth rate.

[This seems counterintuitive? How would November temps be warmer than April?]

In hot weather and in bright sunshine the two halves of the lamina (leaf blade) fold downwards (figure 2). This can reduce the temperature of the leaf by 7 or 8° C in the middle of the day. It also reduces, by more than half, the amount of water used by the leaf for cooling. Under still conditions, leaves torn by the wind are cooler than those that remain entire.
November bunch. During November, or in some years early December, a bunch emerges on which the fruit is uneven and often deformed. The fruit is tapered, being thin at the stalk end, and the flower end may have a conical, green protuberance. Fruit on the same hand is variable in length. Being short and thick when mature they are often called November dumps.
The quality of the fruit is good and has a reputation for being the best tasting of all bananas. However, sometimes very few fruit develop to marketable size.
November bunch has been observed in all subtropical countries where bananas are grown.