Global temperature, Sep 2011

Global anomaly+0.56°C1951–1980

Rank among all Seps23 / 146warmest first

N. Hemisphere+0.73°C

S. Hemisphere+0.38°C

vs same month last year−0.07°C

CO₂ (Mauna Loa)389.28 ppm

All months of 2011

Jan+0.52°C

Feb+0.47°C

Mar+0.65°C

Apr+0.64°C

May+0.53°C

Jun+0.62°C

Jul+0.71°C

Aug+0.74°C

Sep ◀+0.56°C

Oct+0.65°C

Nov+0.60°C

Dec+0.60°C

This month+0.56°C

Same month, previous year+0.63°C

Same month 10 years earlier+0.52°C

Same month 50 years earlier+0.08°C

Sep average 1991–2020+0.58°C

Warmest Sep on record (2023)+1.48°C

Year	Global	NH	SH	Rank
2001	+0.52°C	+0.56°C	+0.47°C	24
2002	+0.64°C	+0.62°C	+0.65°C	18
2003	+0.62°C	+0.78°C	+0.47°C	20
2004	+0.50°C	+0.59°C	+0.42°C	26
2005	+0.72°C	+0.89°C	+0.54°C	16
2006	+0.66°C	+0.82°C	+0.50°C	17
2007	+0.60°C	+0.68°C	+0.53°C	22
2008	+0.60°C	+0.56°C	+0.65°C	21
2009	+0.72°C	+0.85°C	+0.59°C	15
2010	+0.63°C	+0.69°C	+0.56°C	19
2011	+0.56°C	+0.73°C	+0.38°C	23
2012	+0.72°C	+0.85°C	+0.59°C	14
2013	+0.77°C	+0.69°C	+0.83°C	12
2014	+0.88°C	+0.84°C	+0.91°C	9
2015	+0.84°C	+1.18°C	+0.52°C	10
2016	+0.90°C	+1.23°C	+0.59°C	7
2017	+0.74°C	+0.99°C	+0.51°C	13
2018	+0.80°C	+0.98°C	+0.63°C	11
2019	+0.93°C	+1.22°C	+0.65°C	5
2020	+0.96°C	+1.20°C	+0.73°C	4
2021	+0.92°C	+1.05°C	+0.80°C	6

Rank 278 of all 1760 months on record. Temperatures are anomalies vs the 1951–1980 average (NASA GISTEMP v4); values can be revised later.