Climate: See
these charts, or below.
Currency: ISK / Icelandic Krona.
XE converter page (changeable, but set to ISK -> USD).
(7 Aug 2018: 1 USD =106.786ISK, 1 EUR =123.740ISK, 1 GBP =138.186ISK)
“
Midnight Sun” - What times are daylight or dark? See
here.
Northern Lights / Aurora Borealis: most common in winter, particularly during periods of high solar flare activity. Requires clear night time.