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Mikkeli September Weather

Averages and records for weather in Mikkeli, Finland in the month of September.

Typical Mikkeli September Weather 1991–2020
Average daily high	14.4 °C
Average daily low	5.5 °C
Average monthly precipitation	5.4 cm
Daily chance of precipitation	52.7%

Mikkeli September Weather Records 1959–2024
Highest temperature	26.4 °C	September 2, 1963
Lowest temperature	-6.8 °C	September 21, 2002
Highest daily low	16.6 °C	September 7, 1967
Lowest daily high	1.8 °C	September 23, 2014
Hottest average high temperature	18.4 °C	2023
Coldest average high temperature	9.2 °C	1973
Most daily precipitation	4.4 cm	September 12, 1973
Most monthly precipitation	12.2 cm	1973

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	17.5	7.8	26.3	1.1
September 2	17.3	7.7	26.4	-2.0
September 3	17.0	7.5	25.8	-3.7
September 4	16.8	7.3	24.5	-1.4
September 5	16.6	7.2	24.8	0.2
September 6	16.4	7.0	24.9	-3.8
September 7	16.2	6.8	23.6	-3.6
September 8	16.0	6.7	23.6	-1.6
September 9	15.8	6.5	22.7	-2.7
September 10	15.5	6.4	21.1	-0.9
September 11	15.3	6.2	21.8	-2.1
September 12	15.1	6.0	23.4	-3.2
September 13	14.9	5.8	21.5	-1.2
September 14	14.7	5.7	20.4	-1.1
September 15	14.5	5.6	19.4	-3.6
September 16	14.3	5.5	18.3	-5.1
September 17	14.1	5.3	20.2	-3.8
September 18	13.8	5.1	20.1	-2.6
September 19	13.6	5.0	20.4	-3.4
September 20	13.4	4.8	21.2	-4.8
September 21	13.2	4.7	19.8	-6.8
September 22	12.9	4.6	22.2	-5.8
September 23	12.7	4.4	21.8	-3.0
September 24	12.5	4.3	20.2	-5.8
September 25	12.3	4.2	20.2	-5.0
September 26	12.0	4.1	19.8	-5.4
September 27	11.8	4.0	20.5	-4.5
September 28	11.5	3.8	17.5	-5.0
September 29	11.3	3.7	19.4	-3.7
September 30	11.1	3.5	19.0	-4.5

Weather Station Details

Years	Station	Coordinates
1959–2024	Mikkeli Lentoasema	location