Temperature & Rainfall Trends

Note: Trends are based on data recorded at Meteo San Sebastián - Arriola since 2012.
Annual Avg Temperature Trend
Month Average since 2012 Current Month Difference
January 9.6°C 8.6°C (2026) -1.0°C1°C Colder than All-Time Average Temperature.
February 10.5°C 12.3°C (2026) 1.8°C1.8°C Warmer than All-Time Average Temperature.
March 12.1°C 0.0°C (2026) -12.1°C12.1°C Colder than All-Time Average Temperature.
April 13.7°C 16.1°C (2026) 2.4°C2.4°C Warmer than All-Time Average Temperature.
May 15.5°C 15.2°C (2026) -0.3°C0.3°C Colder than All-Time Average Temperature.
June 18.8°C 17.6°C (2026) -1.2°C1.2°C Colder than All-Time Average Temperature.
July 20.7°C 23.1°C (2026) 2.4°C2.4°C Warmer than All-Time Average Temperature.
August 21.0°C 22.5°C (2026) 1.5°C1.5°C Warmer than All-Time Average Temperature.
September 19.5°C 20.6°C (2026) 1.1°C1.1°C Warmer than All-Time Average Temperature.
October 17.3°C 16.6°C (2026) -0.7°C0.7°C Colder than All-Time Average Temperature.
November 13.5°C 11.7°C (2026) -1.8°C1.8°C Colder than All-Time Average Temperature.
December 11.4°C 11.2°C (2025) -0.2°C0.2°C Colder than All-Time Average Temperature.
Average 12 Month Temperature since 2012: 15.33°C
Current 12 Month Temperature: 14.62°C
Current 12 Months Temperature Trend:  -0.7°C0.7°C Colder than All-Time Average Temperature.
Annual Avg Rainfall Trend
Month Average since 2012 Current Month Difference
January 144.5 mm 226.2 mm (2026) 81.7 mm81.7 mm more than All-Time Average Rainfall.
February 108.3 mm 255.6 mm (2026) 147.3 mm147.3 mm more than All-Time Average Rainfall.
March 86.8 mm 120.2 mm (2026) 33.4 mm33.4 mm Warmer than All-Time Average Temperature.
April 91.5 mm 13.8 mm (2026) -77.7 mm77.7 mm less than All-Time Average Rainfall.
May 117.6 mm 100.4 mm (2026) -17.2 mm17.2 mm less than All-Time Average Rainfall.
June 121.8 mm 33.8 mm (2026) -88.0 mm88 mm less than All-Time Average Rainfall.
July 72.6 mm 3.2 mm (2026) -69.4 mm69.4 mm less than All-Time Average Rainfall.
August 91.5 mm 43.0 mm (2026) -48.5 mm48.5 mm less than All-Time Average Rainfall.
September 130.6 mm 47.8 mm (2026) -82.8 mm82.8 mm less than All-Time Average Rainfall.
October 147.8 mm 70.8 mm (2026) -77.0 mm77 mm less than All-Time Average Rainfall.
November 233.3 mm 0.0 mm (2026) -233.3 mm233.3 mm less than All-Time Average Rainfall.
December 175.6 mm 144.0 mm (2025) -31.6 mm31.6 mm less than All-Time Average Rainfall.
Average 12 Month Rainfall since 2012: 1,521.9 mm
Rainfall for last 12 months: 1,058.8 mm
Current 12 Months Rainfall difference: -463.1 mm463.1 mm less than All-Time Average Rainfall.
This data is reflective of 12 month trending at the Meteo San Sebastián - Arriola Weather Station location. This is not official scientific data. The weather data presented here is based on data collected since 2012. Script courtesy of  Michael Holden from Relay Weather. Script calculations courtesy of Murry Conarroe of Wildwood Weather. Custom script modification available at: Custom script modification