Global Temperature September Report.

The average global temperature by averaging absolute temperatures across the earths surface is 5.99°C, against the standard area weighted average global surface temperature 15.80C.

Global surface area weighted average heat (in watts per square meter) is 346 watts at 60° latitude for both hemispheres. By averaging absolute temperatures across the earth, the heat average is determined 344.5 watts (51°N and 58°S) releasing 240 watts to space.

Here are the 4 weeks of absolute temperatures and area weighted temperatures.

Global Temperature Sept 5th 2025 6.28°C

Area weighted temperatures for Sept 5th 15.89°C

Area weighted global mean temperature 5th Sept 25 15.89°C

Global temperature September 13th 2025 5.57°C

Global Surface Temperature Sept 13th 2025 (Area weighted) 15.6°C

Global Mean Surface Temperature Sept 19th 2025 6.75°C

Global Temperature Sept 19th 2025 (weighted area) 15.8°C

Global Mean Surface Temperature Sept 25th 2025 5.90°C

Global Temperature Sept 25th 2025 (Area Weighted) 15.4°C

Snow extent (NH)

2.56 million km2 to 7.31 million km2

Sea ice extent

4.65 million km2 to 5.02 million km2

Snow extent (SH)

14.2 million km2

Sea ice extent

17.33 million km2 to 17.45 million km2

Tropical cycles

Hurricane Gabrialle

Sept 21^st Cat1

Sept 22^nd Cat 4 to 23^rd 

September 11^th to 25^th 

Hurricane Humberto

September 26^th Cat 1

September 27^th Cat 5

September 28^th Cat 4

September 29^th Cat 3

September 30^th Cat 1

September 19^th to 30^th 

Hurricane Lonena

September 1^st to September 3^rd

September 2^nd Cat 1

Tropical storm Mario

September 8^th to September 16^th

Hurricane Narda

September 18^th September 27^th

September 23^rd Cat 1

September 23^th Cat 2

Hurricane Octave (Cat1 Oct 5th) 

September 28^th to October 9^th

Typhoon Tapah (Cat 1 Sept 7th)

September 4^th to September 8^th

Tropical Storm Mitag

September 15^th to September 18^th

Super Typhoon Ragasa

September 16^th to September 24^th

September 21^st – 22^nd Cat 5  

Typhoon Neoguri

September 17^th to September 28^th 

September 20^th Cat 2

September 21^st to 24^th Super typhoon cat 5

Typhoon Bualoi

September 22^nd to September 29^th

September 25^th Cat 2

Summary

Atlantic storms

2 hurricanes

Pacific Storms

3 hurricanes

1 tropical storm

Pacific typhoons

4 typhoons (1 very violent typhoon)

1 tropical storm

Sea surface temperature

Temperature of the oceans was 15.28°C (Area Weighted) 20.5°C

Global Temperature of the Oceans 15.28°C

Atlantic Ocean 23.5°C

North Pacific 23.3°C

North of 60° degrees 4.4°C (sea ice extent < 5 million km2)

South of 60° degrees -0.9°C (sea ice extent > 16 million km2)

September had typical temperatures globally reaching 4.85°C (Year to end of September) and cooling normally from summers peak.

Discussion with Google AI will be added to the site in next few days regarding area weighted temperatures and issues with climate science.