Global temperature, Oct 1991

Global anomaly+0.29°C1951–1980

Rank among all Octs35 / 146warmest first

N. Hemisphere+0.29°C

S. Hemisphere+0.29°C

vs same month last year−0.16°C

CO₂ (Mauna Loa)352.43 ppm

All months of 1991

Jan+0.43°C

Feb+0.50°C

Mar+0.36°C

Apr+0.51°C

May+0.34°C

Jun+0.53°C

Jul+0.48°C

Aug+0.39°C

Sep+0.44°C

Oct ◀+0.29°C

Nov+0.30°C

Dec+0.32°C

This month+0.29°C

Same month, previous year+0.45°C

Same month 10 years earlier+0.12°C

Same month 50 years earlier+0.35°C

Oct average 1991–2020+0.62°C

Warmest Oct on record (2024)+1.35°C

Year	Global	NH	SH	Rank
1981	+0.12°C	+0.23°C	+0.02°C	52
1982	+0.13°C	±0.00°C	+0.27°C	49
1983	+0.17°C	+0.12°C	+0.22°C	44
1984	+0.13°C	+0.08°C	+0.19°C	48
1985	+0.12°C	+0.02°C	+0.21°C	51
1986	+0.15°C	+0.09°C	+0.22°C	45
1987	+0.33°C	+0.22°C	+0.45°C	34
1988	+0.38°C	+0.23°C	+0.52°C	31
1989	+0.29°C	+0.25°C	+0.33°C	36
1990	+0.45°C	+0.48°C	+0.41°C	28
1991	+0.29°C	+0.29°C	+0.29°C	35
1992	+0.07°C	−0.17°C	+0.31°C	63
1993	+0.24°C	+0.12°C	+0.36°C	40
1994	+0.43°C	+0.54°C	+0.31°C	29
1995	+0.46°C	+0.60°C	+0.33°C	27
1996	+0.22°C	+0.04°C	+0.39°C	42
1997	+0.61°C	+0.63°C	+0.61°C	23
1998	+0.42°C	+0.54°C	+0.31°C	30
1999	+0.34°C	+0.39°C	+0.28°C	33
2000	+0.27°C	+0.29°C	+0.25°C	37
2001	+0.50°C	+0.60°C	+0.40°C	26

Rank 462 of all 1760 months on record. Temperatures are anomalies vs the 1951–1980 average (NASA GISTEMP v4); values can be revised later.