。
Evening was drawing near.
Literal
Evening [subject-が] approach-[come-toward-てきた].
近づいてきた layers the directional auxiliary ~てくる onto 近づく ('to approach'). With a non-speaker subject like 'evening,' ~てくる signals the approach toward a current moment or toward the speaker's perceptual field — 'evening came drawing near.' A small example of how ~てくる does emotional/perspective work, not just physical direction.