Global temperature, Dec 1984

Global anomaly−0.04°C1951–1980

Rank among all Decs71 / 146warmest first

N. Hemisphere−0.42°C

S. Hemisphere+0.34°C

vs same month last year−0.21°C

CO₂ (Mauna Loa)345.00 ppm

All months of 1984

Jan+0.31°C

Feb+0.14°C

Mar+0.26°C

Apr+0.06°C

May+0.33°C

Jun+0.02°C

Jul+0.19°C

Aug+0.19°C

Sep+0.21°C

Oct+0.13°C

Nov+0.06°C

Dec ◀−0.04°C

This month−0.04°C

Same month, previous year+0.17°C

Same month 10 years earlier−0.08°C

Same month 50 years earlier−0.03°C

Dec average 1991–2020+0.60°C

Warmest Dec on record (2023)+1.36°C

Year	Global	NH	SH	Rank
1974	−0.08°C	−0.27°C	+0.09°C	85
1975	−0.17°C	−0.22°C	−0.13°C	101
1976	+0.11°C	−0.26°C	+0.47°C	56
1977	+0.03°C	+0.02°C	+0.04°C	62
1978	+0.08°C	+0.02°C	+0.13°C	58
1979	+0.47°C	+0.54°C	+0.41°C	26
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

Rank 901 of all 1760 months on record. Temperatures are anomalies vs the 1951–1980 average (NASA GISTEMP v4); values can be revised later.