Climate Trends in Iceland

• In Iceland, the longest run of frost days in a row in the data is 77 days, at Akureyri (Iceland), from 8 November 1950 to 23 January 1951.
• In Iceland, the longest run of ice days in a row in the data is 24 days, at Stykkisholmur (Iceland), from 31 December 1958 to 23 January 1959.
• In Iceland, the longest run of dry days in a row in the data is 42 days, at Teigarhorn (Iceland), in 1958.
• In Iceland, the longest run of wet days in a row in the data is 29 days, at Keflavik (Iceland), in 1959.

Longest run of frost days (minimum at or below 0 C)

Consecutive days with a daily minimum at or below 0 C (32 F).

Longest run of ice days (maximum at or below 0 C)

Consecutive days with a daily maximum at or below 0 C (32 F).

Longest dry spell (days under 1 mm of rain), within one year

Consecutive days with less than 1 mm (0.04 in) of rain, the longest run within a year. The dates are not kept, so the list gives the year (within the year).

Longest wet spell (days with 1 mm or more of rain), within one year

Consecutive days with 1 mm (0.04 in) or more of rain, the longest run within a year. The dates are not kept, so the list gives the year (within the year).

A run belongs to the year it started in, even when it ran on into the next year. A station appears once per list, with its longest run in a complete year. Dry and wet spells are the longest run within a year. Lists use complete years only, so a long run in a year with gaps in the record is not counted.

• In Iceland, the largest reported one day rise in the daily maximum is 18.4 C (33.1 F), at Dalatangi (Iceland) on 14 September 1988.
• In Iceland, the largest reported one day drop in the daily maximum is 21.0 C (37.8 F), at Akureyri (Iceland) on 6 March 1969.
• In Iceland, the largest reported one day rise in the daily minimum is 18.5 C (33.3 F), at Teigarhorn (Iceland) on 27 January 1981.
• In Iceland, the largest reported one day drop in the daily minimum is 18.0 C (32.4 F), at Teigarhorn (Iceland) on 3 March 1969.
• In Iceland, the largest reported widest range between the high and the low of one day is 29.4 C (52.9 F), at Akureyri (Iceland) on 25 January 1981.
• In Iceland, the smallest reported narrowest range between the high and the low of one day is 0.0 C (0.0 F), at Keflavik (Iceland) on 15 December 1963.

Caveat.Single readings can still be instrument errors that quality control missed. A station with one faulty value can top a list, so read each entry as a reported value, not as a confirmed event.

Biggest one day rise in the daily maximum

The largest increase in the daily maximum temperature from one day to the next. Values are in degrees Celsius with Fahrenheit beside them.

Biggest one day drop in the daily maximum

The largest decrease in the daily maximum temperature from one day to the next. Values are in degrees Celsius with Fahrenheit beside them.

Biggest one day rise in the daily minimum

The largest increase in the daily minimum temperature from one day to the next. Values are in degrees Celsius with Fahrenheit beside them.

Biggest one day drop in the daily minimum

The largest decrease in the daily minimum temperature from one day to the next. Values are in degrees Celsius with Fahrenheit beside them.

Widest range between the high and the low of one day

The largest difference between the highest and the lowest temperature of the same day. Values are in degrees Celsius with Fahrenheit beside them.

Narrowest range between the high and the low of one day

The smallest difference between the highest and the lowest temperature of the same day. Values are in degrees Celsius with Fahrenheit beside them.

Only stations with at least 10 complete years are listed, and a station appears once per list.