This is the 6695th most frequent German word.
erträglichen
"Erträglichen" means "bearable" or "tolerable" in English.
In this sentence, 'erträglich' refers to the weather conditions being acceptable or tolerable for comfort.
Das Wetter ist heute besonders angenehm und erträglich.
The weather today is especially pleasant and bearable.
Here, 'erträglich' describes the subjective experience of the noise as either tolerable or intolerable depending on context.
Ich finde den Lärm in der Stadt manchmal nicht erträglich.
I find the noise in the city sometimes unbearable.
In this case, 'erträglich' is used to express the level of difficulty or stress being barely acceptable or endurable.