Weather on September 25 in Helsinki

Historical weather data for September 25 in Helsinki, Finland

Avg High13°C (55°F)
Avg Low7°C (45°F)
Warmest202417°C
Coldest19774°C

Based on 55 years of data from HELSINKI RAUTATIENTORI

About This Date

September 25th in Helsinki, Finland typically brings cool fall weather, with average highs around 13°C and lows near 7°C. Over 55 years of records, the warmest September 25th was in 2024 (17°C average), while the coldest was 1977 (4°C) — a 22°F range across recorded history. Rain or other precipitation has occurred on about 42% of September 25th dates historically, with the wettest September 25th recording 1.1" of rain. The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.

The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.

Planning for September 25th in Helsinki? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.

Year by Year History

YearHighLowPrecip
202515°C (59°F)3°C (37°F)0"
202419°C (66°F)14°C (58°F)0.47"
202317°C (63°F)8°C (47°F)0"
202213°C (56°F)7°C (44°F)0"
202113°C (55°F)8°C (47°F)0"
202017°C (63°F)14°C (58°F)0.01"
20198°C (47°F)7°C (45°F)0.08"
201812°C (54°F)3°C (38°F)0"
201717°C (62°F)10°C (50°F)0"
201616°C (60°F)9°C (48°F)0"
201516°C (61°F)12°C (54°F)0.2"
201413°C (56°F)9°C (48°F)--
20138°C (47°F)3°C (37°F)--
201211°C (51°F)8°C (47°F)--
201114°C (57°F)7°C (44°F)0"
201018°C (64°F)13°C (56°F)--
200912°C (54°F)4°C (40°F)0"
200817°C (62°F)7°C (44°F)0"
200717°C (63°F)12°C (54°F)0"
200614°C (58°F)11°C (51°F)0"
200516°C (61°F)12°C (53°F)0"
200413°C (55°F)9°C (49°F)0.02"
200312°C (53°F)4°C (39°F)0.23"
200212°C (53°F)6°C (42°F)0"
20019°C (49°F)1°C (34°F)0"
200015°C (59°F)7°C (44°F)0"
199914°C (58°F)5°C (41°F)0"
199812°C (53°F)3°C (38°F)0"
199717°C (63°F)2°C (35°F)0"
199613°C (55°F)2°C (35°F)0"
199514°C (58°F)12°C (54°F)0.68"
199414°C (57°F)8°C (46°F)0"
19938°C (46°F)1°C (34°F)0"
199214°C (58°F)12°C (54°F)0.14"
199114°C (58°F)12°C (53°F)0.18"
19908°C (46°F)5°C (41°F)0.66"
198914°C (58°F)13°C (55°F)0.02"
198812°C (54°F)10°C (50°F)0.7"
198712°C (53°F)8°C (47°F)0.64"
19867°C (44°F)2°C (35°F)0"
19859°C (49°F)4°C (39°F)0.03"
198413°C (55°F)12°C (53°F)0.25"
198312°C (53°F)8°C (46°F)0"
198213°C (56°F)2°C (35°F)0"
198114°C (58°F)9°C (48°F)0"
198012°C (54°F)3°C (38°F)0.05"
197914°C (57°F)6°C (42°F)0.01"
19787°C (44°F)2°C (36°F)0.06"
19779°C (49°F)-1°C (30°F)0"
19768°C (46°F)2°C (36°F)0.03"
197514°C (57°F)10°C (50°F)0.4"
197413°C (56°F)11°C (51°F)1.1"
19738°C (47°F)4°C (40°F)0"
197214°C (58°F)9°C (49°F)0.01"
197115°C (59°F)11°C (52°F)0.63"

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