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Helsinki August Weather

Averages and records for weather in Helsinki, Finland in the month of August.

Typical Helsinki August Weather 1991–2020
Average daily high	20.5 °C
Average daily low	13.5 °C
Average monthly precipitation	8.1 cm
Daily chance of precipitation	43.3%

Helsinki August Weather Records 1951–2024
Highest temperature	31.2 °C	August 8, 1975
Lowest temperature	2.8 °C	August 29, 1966
Highest daily low	22.5 °C	August 3, 2018
Lowest daily high	9.9 °C	August 28, 1959
Hottest average high temperature	23.3 °C	2002
Coldest average high temperature	16.1 °C	1987
Most daily precipitation	5.3 cm	August 24, 1967
Most monthly precipitation	18.0 cm	2005

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

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
August 1	21.9	14.7	27.7	9.3
August 2	21.9	14.6	30.0	7.5
August 3	21.8	14.6	28.4	8.6
August 4	21.8	14.5	27.0	8.8
August 5	21.7	14.5	29.6	8.9
August 6	21.6	14.4	30.2	8.5
August 7	21.5	14.3	28.4	7.6
August 8	21.5	14.3	31.2	7.8
August 9	21.4	14.2	27.5	7.7
August 10	21.2	14.1	27.7	7.8
August 11	21.1	14.0	27.8	8.5
August 12	21.0	13.9	26.7	6.6
August 13	20.9	13.8	26.7	7.8
August 14	20.7	13.7	25.7	5.2
August 15	20.6	13.6	27.8	4.8
August 16	20.5	13.5	28.7	6.0
August 17	20.4	13.4	27.1	5.6
August 18	20.2	13.3	26.8	6.1
August 19	20.1	13.1	28.2	6.2
August 20	19.9	13.1	27.3	5.8
August 21	19.8	13.0	26.1	6.7
August 22	19.6	12.9	24.6	5.6
August 23	19.5	12.7	24.8	5.6
August 24	19.3	12.6	25.1	6.2
August 25	19.1	12.5	25.2	5.0
August 26	19.0	12.4	25.2	4.6
August 27	18.8	12.2	26.0	3.4
August 28	18.7	12.1	27.6	6.0
August 29	18.6	12.0	24.7	2.8
August 30	18.4	11.9	23.0	5.2
August 31	18.2	11.8	24.0	4.5

Weather Station Details

Years	Station	Coordinates
1951–2024	Helsinki Kaisaniemi Aws	location