Global temperature, Sep 2017

Global anomaly+0.74°C1951–1980

Rank among all Seps13 / 146warmest first

N. Hemisphere+0.99°C

S. Hemisphere+0.51°C

vs same month last year−0.16°C

CO₂ (Mauna Loa)403.57 ppm

All months of 2017

Jan+1.02°C

Feb+1.13°C

Mar+1.16°C

Apr+0.94°C

May+0.91°C

Jun+0.71°C

Jul+0.82°C

Aug+0.87°C

Sep ◀+0.74°C

Oct+0.88°C

Nov+0.87°C

Dec+0.93°C

This month+0.74°C

Same month, previous year+0.90°C

Same month 10 years earlier+0.60°C

Same month 50 years earlier−0.06°C

Sep average 1991–2020+0.58°C

Warmest Sep on record (2023)+1.48°C

Year	Global	NH	SH	Rank
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
2022	+0.88°C	+1.15°C	+0.61°C	8
2023	+1.48°C	+1.68°C	+1.29°C	1
2024	+1.21°C	+1.56°C	+0.87°C	3
2025	+1.25°C	+1.41°C	+1.09°C	2

Rank 171 of all 1760 months on record. Temperatures are anomalies vs the 1951–1980 average (NASA GISTEMP v4); values can be revised later.