Below 7 °C growth stops. Flowers are damaged by frost. The ideal temperature for the growth of the date palm, during the period from pollination to fruit ripening, ranges from 21 to 27 °C. Higher temperatures are endured as long as there is irrigation. I hope this helps :)

Thanks dear Andrew Paul McKenzie Pegman,

But I would like to know if you talked about average, maximum or minimum temperatures?

Because the temperatures in the hot deserts are very high.

Plz, check here..

http://www.fao.org/docrep/006/Y4360E/y4360e08.htm

See also here..

http://hortsci.ashspublications.org/content/42/5/1077.full

Explore here too..

https://www.idosi.org/aejaes/jaes11(5)11/3.pdf

Kindly see this too...

http://www.sciencedirect.com/science/article/pii/S1319562X13000041

Hello Sir Surender Singh,

Thank you for these very useful articles