Solar Cycle 25 SFI and SSN Data (Updated 12/3/2021) --------------------------------------------------- Month Year SFI Smoothed SFI SSN Smoothed SSN ----------------------------------------------------------------- June 2019 68.1 69.7 1.2 3.7 July 2019 67.3 69.8 0.9 3.5 August 2019 67.1 69.8 0.5 3.4 September 2019 68.0 69.8 1.1 3.1 October 2019 67.5 69.6 0.4 2.6 November 2019 70.2 69.4 0.5 2.0 December 2019 70.9 69.4 1.5 1.8 January 2020 72.3 69.5 6.2 2.2 February 2020 70.9 69.8 0.2 2.7 March 2020 70.2 70.1 1.5 3.0 April 2020 69.6 70.5 5.2 3.6 May 2020 69.2 71.7 0.2 5.6 June 2020 69.7 73.2 5.8 7.9 July 2020 69.5 74.0 6.1 9.0 August 2020 71.7 74.3 7.5 9.5 September 2020 70.6 74.7 0.6 10.5 October 2020 74.6 75.2 14.6 11.9 November 2020 90.1 75.7 34.5 13.6 December 2020 87.3 76.4 23.1 15.3 January 2021 76.1 77.3 10.4 17.3 February 2021 74.3 78.0 8.2 19.1 March 2021 76.5 79.0 17.2 21.8 April 2021 74.7 80.3 24.5 24.9 May 2021 75.6 80.8 21.2 25.9 June 2021 79.8 25.4 July 2021 81.0 34.4 August 2021 77.9 22.4 September 2021 87.4 51.5 October 2021 90.1 38.1 November 2021 86.6 35.0 December 2021 ------------------------------------------------------------------ Data Source: NOAA / Space Weather Prediction Center Compiled by SolarHam.com