Global temperature, Dec 1940

Global anomaly+0.31°C1951–1980

Rank among all Decs39 / 146warmest first

N. Hemisphere+0.35°C

S. Hemisphere+0.29°C

vs same month last year−0.11°C

CO₂ (Mauna Loa)–

All months of 1940

Jan−0.01°C

Feb+0.08°C

Mar+0.09°C

Apr+0.17°C

May+0.11°C

Jun+0.11°C

Jul+0.12°C

Aug+0.06°C

Sep+0.15°C

Oct+0.11°C

Nov+0.16°C

Dec ◀+0.31°C

This month+0.31°C

Same month, previous year+0.42°C

Same month 10 years earlier−0.06°C

Same month 50 years earlier−0.32°C

Dec average 1991–2020+0.60°C

Warmest Dec on record (2023)+1.36°C

Year	Global	NH	SH	Rank
1930	−0.06°C	+0.08°C	−0.18°C	81
1931	−0.05°C	+0.10°C	−0.20°C	76
1932	−0.27°C	−0.22°C	−0.31°C	116
1933	−0.45°C	−0.55°C	−0.36°C	137
1934	−0.03°C	+0.17°C	−0.23°C	70
1935	−0.17°C	−0.17°C	−0.17°C	102
1936	−0.01°C	+0.14°C	−0.18°C	65
1937	−0.08°C	−0.01°C	−0.14°C	88
1938	−0.13°C	−0.13°C	−0.14°C	94
1939	+0.42°C	+0.77°C	+0.09°C	31
1940	+0.31°C	+0.35°C	+0.29°C	39
1941	+0.21°C	+0.19°C	+0.25°C	47
1942	+0.11°C	+0.25°C	−0.04°C	57
1943	+0.23°C	+0.37°C	+0.08°C	44
1944	+0.04°C	±0.00°C	+0.09°C	61
1945	−0.07°C	−0.21°C	+0.08°C	83
1946	−0.31°C	−0.45°C	−0.15°C	124
1947	−0.13°C	−0.05°C	−0.22°C	93
1948	−0.24°C	−0.39°C	−0.08°C	113
1949	−0.18°C	−0.14°C	−0.23°C	104
1950	−0.22°C	−0.13°C	−0.32°C	110

Rank 449 of all 1760 months on record. Temperatures are anomalies vs the 1951–1980 average (NASA GISTEMP v4); values can be revised later.