Global temperature, Sep 1981

Global anomaly+0.15°C1951–1980

Rank among all Seps45 / 146warmest first

N. Hemisphere+0.13°C

S. Hemisphere+0.16°C

vs same month last year−0.05°C

CO₂ (Mauna Loa)336.95 ppm

All months of 1981

Jan+0.53°C

Feb+0.42°C

Mar+0.48°C

Apr+0.32°C

May+0.25°C

Jun+0.29°C

Jul+0.33°C

Aug+0.35°C

Sep ◀+0.15°C

Oct+0.12°C

Nov+0.23°C

Dec+0.41°C

This month+0.15°C

Same month, previous year+0.20°C

Same month 10 years earlier−0.05°C

Same month 50 years earlier−0.07°C

Sep average 1991–2020+0.58°C

Warmest Sep on record (2023)+1.48°C

Year	Global	NH	SH	Rank
1971	−0.05°C	−0.14°C	+0.03°C	73
1972	+0.02°C	−0.26°C	+0.31°C	64
1973	+0.09°C	−0.09°C	+0.26°C	51
1974	−0.08°C	−0.16°C	±0.00°C	81
1975	−0.02°C	−0.08°C	+0.02°C	69
1976	−0.06°C	−0.12°C	±0.00°C	75
1977	+0.02°C	+0.12°C	−0.08°C	63
1978	+0.06°C	−0.01°C	+0.12°C	58
1979	+0.25°C	+0.19°C	+0.31°C	39
1980	+0.20°C	+0.10°C	+0.31°C	43
1981	+0.15°C	+0.13°C	+0.16°C	45
1982	+0.14°C	+0.06°C	+0.23°C	47
1983	+0.37°C	+0.26°C	+0.49°C	32
1984	+0.21°C	−0.04°C	+0.46°C	41
1985	+0.13°C	+0.02°C	+0.24°C	48
1986	+0.03°C	−0.02°C	+0.09°C	62
1987	+0.35°C	+0.39°C	+0.33°C	34
1988	+0.37°C	+0.26°C	+0.47°C	31
1989	+0.35°C	+0.23°C	+0.46°C	33
1990	+0.23°C	+0.42°C	+0.05°C	40
1991	+0.44°C	+0.36°C	+0.52°C	27

Rank 597 of all 1760 months on record. Temperatures are anomalies vs the 1951–1980 average (NASA GISTEMP v4); values can be revised later.