Global temperature, Jan 1991

Global anomaly+0.43°C1951–1980

Rank among all Jans33 / 147warmest first

N. Hemisphere+0.59°C

S. Hemisphere+0.26°C

vs same month last year+0.01°C

CO₂ (Mauna Loa)354.93 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+0.43°C

Same month, previous year+0.42°C

Same month 10 years earlier+0.53°C

Same month 50 years earlier+0.17°C

Jan average 1991–2020+0.63°C

Warmest Jan on record (2025)+1.38°C

Year	Global	NH	SH	Rank
1981	+0.53°C	+0.80°C	+0.25°C	27
1982	+0.05°C	−0.14°C	+0.24°C	70
1983	+0.53°C	+0.55°C	+0.51°C	26
1984	+0.31°C	+0.33°C	+0.28°C	40
1985	+0.22°C	+0.07°C	+0.37°C	49
1986	+0.26°C	+0.36°C	+0.16°C	46
1987	+0.32°C	+0.25°C	+0.39°C	39
1988	+0.57°C	+0.59°C	+0.55°C	23
1989	+0.12°C	+0.08°C	+0.16°C	57
1990	+0.42°C	+0.47°C	+0.36°C	34
1991	+0.43°C	+0.59°C	+0.26°C	33
1992	+0.48°C	+0.61°C	+0.34°C	30
1993	+0.35°C	+0.39°C	+0.30°C	37
1994	+0.26°C	+0.34°C	+0.19°C	45
1995	+0.53°C	+0.75°C	+0.30°C	25
1996	+0.24°C	+0.27°C	+0.22°C	48
1997	+0.32°C	+0.34°C	+0.29°C	38
1998	+0.58°C	+0.62°C	+0.55°C	22
1999	+0.48°C	+0.59°C	+0.37°C	29
2000	+0.25°C	+0.39°C	+0.11°C	47
2001	+0.45°C	+0.56°C	+0.33°C	32

Rank 363 of all 1760 months on record. Temperatures are anomalies vs the 1951–1980 average (NASA GISTEMP v4); values can be revised later.