This is the 16177th most frequent Polish word.
umiarkowanej
"Moderate" or "reasonable."
Here, 'umiarkowanym' is used as an adjective describing 'climate', translated as 'temperate' and refers to moderate weather conditions.
W klimacie umiarkowanym pogoda jest często łagodna.
In a temperate climate, the weather is often mild.
In this sentence, 'umiarkowanej' describes 'harmony', implying a balanced and not overly extreme connection.
Lubię żyć w umiarkowanej harmonii z naturą.
I like living in moderate harmony with nature.
Here, 'umiarkowane' is used to characterize 'prices' which indicates they are reasonable or within median range.