Global temperature, Oct 2009

Global anomaly+0.65°C1951–1980

Rank among all Octs21 / 146warmest first

N. Hemisphere+0.78°C

S. Hemisphere+0.53°C

vs same month last year−0.02°C

CO₂ (Mauna Loa)384.64 ppm

All months of 2009

Jan+0.65°C

Feb+0.53°C

Mar+0.53°C

Apr+0.61°C

May+0.65°C

Jun+0.63°C

Jul+0.74°C

Aug+0.69°C

Sep+0.72°C

Oct ◀+0.65°C

Nov+0.80°C

Dec+0.67°C

This month+0.65°C

Same month, previous year+0.67°C

Same month 10 years earlier+0.34°C

Same month 50 years earlier−0.07°C

Oct average 1991–2020+0.62°C

Warmest Oct on record (2024)+1.35°C

Year	Global	NH	SH	Rank
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
2002	+0.54°C	+0.53°C	+0.55°C	25
2003	+0.72°C	+0.99°C	+0.47°C	15
2004	+0.61°C	+0.70°C	+0.52°C	22
2005	+0.76°C	+0.95°C	+0.57°C	14
2006	+0.71°C	+0.98°C	+0.44°C	17
2007	+0.59°C	+0.84°C	+0.34°C	24
2008	+0.67°C	+0.85°C	+0.49°C	19
2009	+0.65°C	+0.78°C	+0.53°C	21
2010	+0.71°C	+0.88°C	+0.54°C	16
2011	+0.65°C	+0.90°C	+0.40°C	20
2012	+0.80°C	+0.90°C	+0.69°C	13
2013	+0.69°C	+0.83°C	+0.56°C	18
2014	+0.80°C	+0.93°C	+0.68°C	12
2015	+1.08°C	+1.29°C	+0.88°C	4
2016	+0.87°C	+1.03°C	+0.71°C	11
2017	+0.88°C	+1.03°C	+0.74°C	9
2018	+1.02°C	+1.23°C	+0.81°C	5
2019	+1.00°C	+1.29°C	+0.71°C	6

Rank 220 of all 1760 months on record. Temperatures are anomalies vs the 1951–1980 average (NASA GISTEMP v4); values can be revised later.