Global temperature, Dec 1978

Global anomaly+0.08°C1951–1980

Rank among all Decs58 / 146warmest first

N. Hemisphere+0.02°C

S. Hemisphere+0.13°C

vs same month last year+0.05°C

CO₂ (Mauna Loa)334.91 ppm

All months of 1978

Jan+0.06°C

Feb+0.10°C

Mar+0.19°C

Apr+0.17°C

May+0.09°C

Jun−0.01°C

Jul+0.04°C

Aug−0.14°C

Sep+0.06°C

Oct+0.03°C

Nov+0.13°C

Dec ◀+0.08°C

This month+0.08°C

Same month, previous year+0.03°C

Same month 10 years earlier−0.14°C

Same month 50 years earlier−0.16°C

Dec average 1991–2020+0.60°C

Warmest Dec on record (2023)+1.36°C

Year	Global	NH	SH	Rank
1968	−0.14°C	−0.33°C	+0.05°C	95
1969	+0.24°C	+0.31°C	+0.19°C	43
1970	−0.12°C	−0.31°C	+0.06°C	91
1971	−0.08°C	−0.14°C	−0.04°C	86
1972	+0.18°C	−0.04°C	+0.42°C	50
1973	−0.07°C	−0.04°C	−0.10°C	82
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

Rank 687 of all 1760 months on record. Temperatures are anomalies vs the 1951–1980 average (NASA GISTEMP v4); values can be revised later.