There is no scientific evidence that Irish people tan more or less readily than other populations. While Ireland's climate is famously cloudy and rainy, this does not inherently make Irish skin more prone to tanning.
One speculative suggestion is that high humidity might enhance tanning compared to drier, sunnier climates, but this lacks robust dermatological support. Skin response to UV radiation is primarily determined by genetics (melanin type and quantity), not by local weather patterns.
In reality, many Irish people have fair skin (Fitzpatrick types I–II) that burns easily and tans minimally, a trait linked to evolutionary adaptation to low UV environments. However, individual variation is wide, and generalizations about an entire population's tanning ability are unfounded.