Weather on September 21 in Reykjavik

Historical weather data for September 21 in Reykjavik, Iceland

Avg High10°C (50°F)
Avg Low5°C (41°F)
Warmest201913°C
Coldest19792°C

Based on 55 years of data from REYKJAVIK

About This Date

September 21st in Reykjavik, Iceland typically brings cool fall weather, with average highs around 10°C and lows near 5°C. Over 55 years of records, the warmest September 21st was in 2019 (13°C average), while the coldest was 1979 (2°C) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 36% of September 21st dates historically, with the wettest September 21st recording 0.85" of rain. The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.

The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.

Planning for September 21st in Reykjavik? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.

Year by Year History

YearHighLowPrecip
20259°C (49°F)3°C (37°F)--
202411°C (51°F)7°C (45°F)--
202311°C (51°F)2°C (35°F)--
202212°C (53°F)7°C (45°F)--
202113°C (55°F)4°C (40°F)--
20207°C (45°F)3°C (37°F)--
201914°C (58°F)12°C (53°F)--
20186°C (43°F)3°C (37°F)--
201712°C (53°F)7°C (45°F)--
201610°C (50°F)6°C (42°F)--
201512°C (53°F)6°C (43°F)--
201412°C (53°F)7°C (44°F)--
20139°C (49°F)4°C (39°F)--
201211°C (51°F)6°C (43°F)--
201111°C (51°F)4°C (40°F)--
20108°C (47°F)6°C (42°F)--
20099°C (49°F)6°C (43°F)--
20089°C (49°F)4°C (39°F)--
20079°C (49°F)2°C (36°F)--
200613°C (55°F)7°C (44°F)--
20057°C (44°F)1°C (34°F)0.18"
20049°C (49°F)6°C (42°F)0"
20037°C (45°F)3°C (38°F)0.33"
200214°C (57°F)11°C (51°F)0.06"
200112°C (53°F)8°C (46°F)0.01"
200013°C (55°F)7°C (44°F)0.15"
199917°C (62°F)8°C (46°F)0"
19989°C (49°F)5°C (41°F)0.03"
199711°C (51°F)9°C (48°F)0.63"
199612°C (54°F)8°C (47°F)0"
199511°C (51°F)6°C (42°F)0.85"
199411°C (51°F)7°C (44°F)0.69"
199314°C (57°F)5°C (41°F)0"
199211°C (51°F)3°C (38°F)0.07"
19918°C (46°F)5°C (41°F)0.58"
19908°C (46°F)0°C (32°F)0"
19898°C (46°F)1°C (34°F)0"
19888°C (47°F)6°C (42°F)0.09"
198710°C (50°F)8°C (46°F)0"
19868°C (47°F)1°C (34°F)0"
19857°C (44°F)-1°C (31°F)0"
198412°C (54°F)4°C (40°F)0"
19839°C (49°F)3°C (37°F)0"
19829°C (49°F)1°C (33°F)0"
198110°C (50°F)5°C (41°F)0"
198012°C (54°F)9°C (48°F)0.39"
19796°C (42°F)-2°C (29°F)0"
197814°C (58°F)9°C (48°F)0.03"
197711°C (51°F)9°C (48°F)0.01"
197613°C (55°F)8°C (46°F)0.12"
19756°C (43°F)-1°C (31°F)0"
19748°C (47°F)5°C (41°F)0.11"
197310°C (50°F)4°C (40°F)0.08"
19729°C (49°F)6°C (42°F)0.54"
19718°C (46°F)4°C (39°F)0.82"

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