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Reykjavík September Weather

Averages and records for weather in Reykjavík, Iceland in the month of September.

Typical Reykjavík September Weather 1991–2020
Average daily high	11.4 °C
Average daily low	6.3 °C
Average monthly precipitation	8.5 cm
Daily chance of precipitation	69.0%

Reykjavík September Weather Records 1949–2024
Highest temperature	18.5 °C	September 26, 2019
Lowest temperature	-4.4 °C	September 24, 1974
Highest daily low	13.4 °C	September 3, 2010
Lowest daily high	1.4 °C	September 29, 1969
Hottest average high temperature	13.7 °C	1958
Coldest average high temperature	8.2 °C	1979
Most daily precipitation	4.9 cm	September 26, 1959
Most monthly precipitation	17.4 cm	2008

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
September 1	12.9	7.6	17.5	2.4
September 2	12.8	7.5	17.6	1.5
September 3	12.7	7.4	16.7	0.0
September 4	12.6	7.3	16.5	-1.6
September 5	12.5	7.2	17.4	0.6
September 6	12.4	7.1	16.2	1.1
September 7	12.3	7.0	16.5	1.4
September 8	12.1	6.9	16.5	0.0
September 9	12.0	6.8	16.5	0.2
September 10	11.9	6.7	18.5	-0.5
September 11	11.9	6.7	18.5	-1.0
September 12	11.8	6.6	17.6	-0.8
September 13	11.7	6.5	16.5	-1.7
September 14	11.6	6.4	15.9	-1.4
September 15	11.5	6.3	14.6	-0.9
September 16	11.4	6.2	14.8	0.0
September 17	11.3	6.0	16.2	-1.7
September 18	11.1	5.9	14.4	-1.8
September 19	11.0	5.8	15.4	-0.6
September 20	10.9	5.7	17.3	-2.6
September 21	10.7	5.5	16.4	-1.7
September 22	10.6	5.4	15.1	-1.7
September 23	10.5	5.3	15.2	-3.2
September 24	10.4	5.1	16.0	-4.4
September 25	10.3	5.0	17.1	-3.4
September 26	10.2	4.9	18.5	-2.1
September 27	10.1	4.8	16.3	-2.3
September 28	10.0	4.7	15.7	-2.1
September 29	9.8	4.6	16.8	-3.3
September 30	9.8	4.6	16.9	-3.1

Weather Station Details

Years	Station	Coordinates
1949–2024	Reykjavik	location