Global temperature, Sep 1930

Global anomaly−0.15°C1951–1980

Rank among all Seps99 / 146warmest first

N. Hemisphere−0.02°C

S. Hemisphere−0.27°C

vs same month last year+0.10°C

CO₂ (Mauna Loa)–

All months of 1930

Jan−0.31°C

Feb−0.27°C

Mar−0.11°C

Apr−0.25°C

May−0.24°C

Jun−0.22°C

Jul−0.21°C

Aug−0.15°C

Sep ◀−0.15°C

Oct−0.12°C

Nov+0.17°C

Dec−0.06°C

This month−0.15°C

Same month, previous year−0.25°C

Same month 10 years earlier−0.22°C

Same month 50 years earlier−0.15°C

Sep average 1991–2020+0.58°C

Warmest Sep on record (2023)+1.48°C

Year	Global	NH	SH	Rank
1920	−0.22°C	−0.35°C	−0.08°C	115
1921	−0.19°C	−0.18°C	−0.19°C	109
1922	−0.35°C	−0.42°C	−0.29°C	136
1923	−0.31°C	−0.17°C	−0.43°C	133
1924	−0.32°C	−0.22°C	−0.41°C	134
1925	−0.20°C	−0.05°C	−0.33°C	111
1926	−0.14°C	−0.03°C	−0.23°C	96
1927	−0.12°C	+0.03°C	−0.27°C	91
1928	−0.21°C	−0.15°C	−0.26°C	113
1929	−0.25°C	−0.21°C	−0.29°C	123
1930	−0.15°C	−0.02°C	−0.27°C	99
1931	−0.07°C	+0.18°C	−0.29°C	80
1932	−0.11°C	+0.10°C	−0.30°C	89
1933	−0.29°C	−0.28°C	−0.31°C	129
1934	−0.15°C	−0.14°C	−0.16°C	98
1935	−0.21°C	−0.06°C	−0.34°C	112
1936	−0.09°C	+0.06°C	−0.24°C	84
1937	+0.09°C	+0.28°C	−0.10°C	53
1938	+0.01°C	+0.14°C	−0.15°C	66
1939	−0.08°C	+0.12°C	−0.27°C	82
1940	+0.15°C	+0.25°C	+0.07°C	46

Rank 1166 of all 1760 months on record. Temperatures are anomalies vs the 1951–1980 average (NASA GISTEMP v4); values can be revised later.