What is normal body temperature for 1 month baby is 100 celsius considered normal?

Celsius: 37 degrees celsius is normal. 98.6 fharenheit is normal.

100 Celsius boils: Water, i believe u meant 100 fahrenheit, equivalent to about 37.8 celsius, depends on route of testing, time of the day, whether the baby is bundled/under cover, as well as the presence of other symptoms, generally observe, this is a low grade temperture, if it increases or other symptoms develop, call ur md, good luck.