Global temperature, May 1998

Global anomaly+0.68°C1951–1980

Rank among all Mays17 / 147warmest first

N. Hemisphere+0.66°C

S. Hemisphere+0.71°C

vs same month last year+0.33°C

CO₂ (Mauna Loa)369.56 ppm

All months of 1998

Jan+0.58°C

Feb+0.88°C

Mar+0.63°C

Apr+0.64°C

May ◀+0.68°C

Jun+0.77°C

Jul+0.66°C

Aug+0.65°C

Sep+0.42°C

Oct+0.42°C

Nov+0.43°C

Dec+0.55°C

This month+0.68°C

Same month, previous year+0.35°C

Same month 10 years earlier+0.44°C

Same month 50 years earlier−0.01°C

May average 1991–2020+0.58°C

Warmest May on record (2024)+1.16°C

Year	Global	NH	SH	Rank
1988	+0.44°C	+0.43°C	+0.45°C	28
1989	+0.18°C	+0.22°C	+0.13°C	47
1990	+0.46°C	+0.50°C	+0.41°C	27
1991	+0.34°C	+0.33°C	+0.35°C	33
1992	+0.31°C	+0.19°C	+0.44°C	37
1993	+0.28°C	+0.32°C	+0.26°C	39
1994	+0.28°C	+0.39°C	+0.17°C	38
1995	+0.27°C	+0.42°C	+0.13°C	41
1996	+0.27°C	+0.35°C	+0.20°C	40
1997	+0.35°C	+0.42°C	+0.27°C	31
1998	+0.68°C	+0.66°C	+0.71°C	17
1999	+0.26°C	+0.36°C	+0.16°C	42
2000	+0.35°C	+0.55°C	+0.16°C	30
2001	+0.57°C	+0.69°C	+0.46°C	23
2002	+0.64°C	+0.52°C	+0.77°C	19
2003	+0.60°C	+0.72°C	+0.49°C	22
2004	+0.37°C	+0.52°C	+0.22°C	29
2005	+0.63°C	+0.77°C	+0.48°C	20
2006	+0.48°C	+0.76°C	+0.20°C	26
2007	+0.69°C	+0.71°C	+0.66°C	16
2008	+0.50°C	+0.61°C	+0.39°C	25

Rank 205 of all 1760 months on record. Temperatures are anomalies vs the 1951–1980 average (NASA GISTEMP v4); values can be revised later.