The hot week

This was the hottest week of the summer. The afternoon temperatures on its seven days were thirty-one, thirty-three, thirty-five, thirty-seven, thirty-six, thirty-four and thirty-two degrees Celsius.

The hottest week of the summer. Afternoon temperatures: $31,33,35,37,36,34,32$ degrees.

$d=1,\dots ,7$: $T_d=31,33,35,37,36,34,32{}^{\circ }\mathrm{C}$.

The hottest day was the fourth, at thirty-seven degrees, and the coolest was the first, at thirty-one. The difference between them is six degrees.

Hottest: day $4$ at $37$. Coolest: day $1$ at $31$. Difference: $37-31=6$ degrees.

$\max T=37,\min T=31,37-31=6$.

Adding the seven numbers gives two hundred and thirty-eight. Divided by seven, the average is exactly thirty-four degrees, a round number, which is a small surprise.

Sum: $31+33+35+37+36+34+32=238$. Average: $238÷7=34$ degrees, a round number.

$\sum T=238,\bar{T}=238÷7=34$.

Plants ask for an extra watering on days above thirty-five degrees. Only two days went past that line, the fourth and the fifth, so the garden needed just two extra waterings.

Extra watering when the temperature is above $35$: only days $4$ and $5$ were, so $2$ extra waterings.

$T_d>35\iff d\in \{4,5\}$: $2$ waterings.