Weather on September 20 in Helsinki

Historical weather data for September 20 in Helsinki, Finland

Avg High14°C (58°F)
Avg Low8°C (46°F)
Warmest202417°C
Coldest20024°C

Based on 55 years of data from HELSINKI RAUTATIENTORI

About This Date

September 20th in Helsinki, Finland typically brings cool fall weather, with average highs around 14°C and lows near 8°C. Over 55 years of records, the warmest September 20th was in 2024 (17°C average), while the coldest was 2002 (4°C) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 45% of September 20th dates historically, with the wettest September 20th recording 0.99" of rain. The last decade has been 4.6°F warmer on this date compared to 20-30 years ago.

The last decade has been 4.6°F warmer on this date compared to 20-30 years ago.

Planning for September 20th in Helsinki? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.

Year by Year History

YearHighLowPrecip
202519°C (66°F)11°C (52°F)0.1"
202422°C (71°F)11°C (52°F)0"
202318°C (64°F)14°C (58°F)0.01"
202214°C (58°F)9°C (49°F)0"
202111°C (51°F)7°C (44°F)0"
202016°C (60°F)7°C (44°F)0"
201912°C (53°F)2°C (35°F)0.19"
201818°C (64°F)13°C (55°F)0.24"
201713°C (55°F)7°C (44°F)0.06"
201616°C (61°F)7°C (44°F)0"
201517°C (63°F)13°C (56°F)--
201418°C (64°F)14°C (58°F)--
201317°C (63°F)14°C (57°F)--
201214°C (58°F)11°C (51°F)--
201117°C (62°F)13°C (55°F)0"
201016°C (60°F)9°C (49°F)--
200918°C (65°F)12°C (54°F)0.02"
200812°C (53°F)7°C (45°F)0.14"
200715°C (59°F)5°C (41°F)0.99"
200617°C (63°F)13°C (55°F)0.11"
200514°C (57°F)9°C (49°F)0"
200416°C (60°F)11°C (51°F)0.3"
200313°C (56°F)7°C (45°F)0"
20029°C (49°F)-1°C (31°F)0"
200117°C (63°F)13°C (56°F)0"
200015°C (59°F)3°C (37°F)0"
199916°C (60°F)1°C (34°F)0"
199814°C (58°F)8°C (47°F)0"
199712°C (53°F)4°C (39°F)0.01"
199611°C (51°F)2°C (36°F)0"
199512°C (54°F)4°C (40°F)0"
199413°C (56°F)8°C (47°F)0"
199312°C (53°F)-2°C (29°F)0"
199214°C (58°F)7°C (44°F)0"
199114°C (57°F)8°C (47°F)0.03"
199013°C (55°F)9°C (49°F)0.69"
198918°C (64°F)13°C (56°F)0.05"
198816°C (60°F)8°C (47°F)0"
198711°C (51°F)7°C (44°F)0.01"
198613°C (56°F)8°C (47°F)0.01"
198516°C (61°F)11°C (52°F)0.61"
198412°C (53°F)9°C (48°F)0.45"
198316°C (61°F)13°C (56°F)0"
198214°C (57°F)11°C (52°F)0.02"
19819°C (49°F)3°C (38°F)0.01"
198016°C (60°F)10°C (50°F)0.14"
197914°C (58°F)8°C (47°F)0.22"
19789°C (49°F)6°C (43°F)0"
197711°C (51°F)4°C (39°F)0"
197614°C (57°F)2°C (35°F)0"
197513°C (56°F)7°C (44°F)0"
197413°C (55°F)6°C (42°F)0.9"
197313°C (55°F)3°C (37°F)0.28"
197212°C (53°F)2°C (35°F)0"
197113°C (55°F)11°C (52°F)0.09"

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