Global temperature, Dec 2021

Global anomaly+0.88°C1951–1980

Rank among all Decs8 / 146warmest first

N. Hemisphere+1.18°C

S. Hemisphere+0.58°C

vs same month last year+0.08°C

CO₂ (Mauna Loa)416.67 ppm

All months of 2021

Jan+0.82°C

Feb+0.64°C

Mar+0.89°C

Apr+0.76°C

May+0.79°C

Jun+0.85°C

Jul+0.92°C

Aug+0.81°C

Sep+0.92°C

Oct+0.98°C

Nov+0.93°C

Dec ◀+0.88°C

This month+0.88°C

Same month, previous year+0.80°C

Same month 10 years earlier+0.60°C

Same month 50 years earlier−0.08°C

Dec average 1991–2020+0.60°C

Warmest Dec on record (2023)+1.36°C

Year	Global	NH	SH	Rank
2011	+0.60°C	+0.87°C	+0.32°C	18
2012	+0.53°C	+0.45°C	+0.61°C	23
2013	+0.70°C	+0.84°C	+0.55°C	15
2014	+0.79°C	+1.11°C	+0.47°C	12
2015	+1.17°C	+1.54°C	+0.81°C	3
2016	+0.86°C	+1.04°C	+0.68°C	9
2017	+0.93°C	+1.37°C	+0.49°C	7
2018	+0.93°C	+1.10°C	+0.76°C	6
2019	+1.12°C	+1.41°C	+0.83°C	4
2020	+0.80°C	+1.19°C	+0.41°C	11
2021	+0.88°C	+1.18°C	+0.58°C	8
2022	+0.80°C	+1.07°C	+0.53°C	10
2023	+1.36°C	+1.85°C	+0.87°C	1
2024	+1.27°C	+1.71°C	+0.83°C	2
2025	+1.06°C	+1.42°C	+0.69°C	5

Rank 101 of all 1760 months on record. Temperatures are anomalies vs the 1951–1980 average (NASA GISTEMP v4); values can be revised later.