Global temperature, Dec 1990

Global anomaly+0.40°C1951–1980

Rank among all Decs34 / 146warmest first

N. Hemisphere+0.38°C

S. Hemisphere+0.43°C

vs same month last year+0.03°C

CO₂ (Mauna Loa)354.41 ppm

All months of 1990

Jan+0.42°C

Feb+0.44°C

Mar+0.80°C

Apr+0.56°C

May+0.46°C

Jun+0.37°C

Jul+0.46°C

Aug+0.34°C

Sep+0.23°C

Oct+0.45°C

Nov+0.46°C

Dec ◀+0.40°C

This month+0.40°C

Same month, previous year+0.37°C

Same month 10 years earlier+0.21°C

Same month 50 years earlier+0.31°C

Dec average 1991–2020+0.60°C

Warmest Dec on record (2023)+1.36°C

Year	Global	NH	SH	Rank
1980	+0.21°C	+0.08°C	+0.34°C	46
1981	+0.41°C	+0.54°C	+0.28°C	32
1982	+0.43°C	+0.38°C	+0.48°C	30
1983	+0.17°C	+0.11°C	+0.23°C	51
1984	−0.04°C	−0.42°C	+0.34°C	71
1985	+0.14°C	+0.16°C	+0.12°C	54
1986	+0.13°C	+0.06°C	+0.21°C	55
1987	+0.46°C	+0.50°C	+0.43°C	27
1988	+0.29°C	+0.42°C	+0.15°C	40
1989	+0.37°C	+0.33°C	+0.41°C	37
1990	+0.40°C	+0.38°C	+0.43°C	34
1991	+0.32°C	+0.20°C	+0.43°C	38
1992	+0.22°C	+0.21°C	+0.22°C	45
1993	+0.18°C	+0.22°C	+0.15°C	49
1994	+0.39°C	+0.36°C	+0.42°C	35
1995	+0.26°C	+0.27°C	+0.25°C	42
1996	+0.37°C	+0.35°C	+0.39°C	36
1997	+0.59°C	+0.51°C	+0.68°C	19
1998	+0.55°C	+0.74°C	+0.35°C	21
1999	+0.40°C	+0.66°C	+0.14°C	33
2000	+0.28°C	+0.27°C	+0.28°C	41

Rank 383 of all 1760 months on record. Temperatures are anomalies vs the 1951–1980 average (NASA GISTEMP v4); values can be revised later.