Symbols combination indicate words' pronunciation.
ni (3rd tone)
难以预料 [nán yǐ yù liào]
DùIf it is specifically for temperature you can write...Wēn dù
yi (first tone), er (fourth tone), san (first tone), si (4th tone), Wu (3rd tone), lio (4th tone), qi (1st tone), ba (1st tone) jio (3rd tone) shi (2nd tone) tones: 1st-high, level pitch 2nd-rising...
jiu yue