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UAH v6.1 Global Temperature Update for September 2026: +0.61 deg. C

Graph displaying UAH satellite-based temperature variations of the global lower atmosphere from 1979 to 2026. The chart shows temperature departures from the 1991-2020 average, with a linear trend line indicating an increase of +0.16 degrees Celsius per decade. The data points are represented by blue dots, and a red trend line highlights the running centered 13-month average, noting a temperature of +0.61 degrees Celsius as of September 2026.

From Roy Spencer, PhD

October 2nd, 2026 by Roy W. Spencer, Ph. D.

The Version 6.1 global average lower tropospheric temperature (LT) anomaly for September 2026 was +0.61 deg. C departure from the 1991-2020 mean, down from the August 2026 value of +0.68 deg. C.

Line graph depicting UAH satellite-based temperature data of the global lower atmosphere from 1979 to 2026, showing temperature departures from the 1991-2020 average in degrees Celsius, with a linear trend indicating an increase of +0.16 deg. C per decade.

The Version 6.1 global area-averaged linear temperature trend (January 1979 through September 2026) remains at +0.16 deg/ C/decade (+0.22 C/decade over land, +0.13 C/decade over oceans).

The following table lists various regional Version 6.1 LT departures from the 30-year (1991-2020) average for the last 33 months (record highs are in red).

YearMonGlobeNHemSHemTropicUS48ArcticAust.Can.
2024Jan+0.80+1.02+0.57+1.20-0.19+0.40+1.12+0.97
2024Feb+0.88+0.94+0.81+1.16+1.31+0.85+1.16+2.45
2024Mar+0.88+0.96+0.80+1.25+0.22+1.05+1.34+1.12
2024Apr+0.94+1.12+0.76+1.15+0.86+0.88+0.54+1.39
2024May+0.77+0.77+0.78+1.20+0.04+0.20+0.52+0.67
2024June+0.69+0.78+0.60+0.85+1.36+0.63+0.91+0.19
2024July+0.73+0.86+0.61+0.96+0.44+0.56-0.07+1.15
2024Aug+0.75+0.81+0.69+0.74+0.40+0.88+1.75+1.36
2024Sep+0.81+1.04+0.58+0.82+1.31+1.48+0.98
2024Oct+0.75+0.89+0.60+0.63+1.89+0.81+1.09+0.89
2024Nov+0.64+0.87+0.40+0.53+1.11+0.79+1.00+1.61
2024Dec+0.61+0.75+0.47+0.52+1.41+1.12+1.54+1.65
2025Jan+0.45+0.70+0.21+0.24-1.07+0.74+0.48+1.04
2025Feb+0.50+0.55+0.45+0.26+1.03+2.10+0.87-0.35
2025Mar+0.57+0.73+0.41+0.40+1.24+1.23+1.20+0.80
2025Apr+0.61+0.76+0.46+0.36+0.81+0.85+1.21+0.45
2025May+0.50+0.45+0.55+0.30+0.15+0.75+0.98+0.81
2025June+0.48+0.48+0.47+0.30+0.80+0.05+0.39-0.22
2025July+0.36+0.49+0.23+0.45+0.32+0.40+0.53-0.23
2025Aug+0.39+0.39+0.39+0.16-0.06+0.82+0.11+0.62
2025Sep+0.53+0.56+0.49+0.35+0.38+0.77+0.30+2.44
2025Oct+0.53+0.52+0.55+0.24+1.12+1.42+1.67+2.59
2025Nov+0.43+0.59+0.27+0.24+1.32+0.78+0.36+1.47
2025Dec+0.30+0.45+0.15+0.19+2.10+0.32+0.37-1.86
2026Jan+0.35+0.51+0.19+0.09+0.30+1.40+0.95+1.17
2026Feb+0.39+0.54+0.23+0.03+1.91-0.48+0.73+0.32
2026Mar+0.38+0.33+0.42+0.07+3.74-0.48+1.14-3.17
2026Apr+0.39+0.43+0.34+0.23+1.20+0.30+0.70-0.89
2026May+0.53+0.46+0.60+0.58+0.21+0.34+0.10+0.21
2026June+0.46+0.54+0.38+0.57+0.64+1.01+0.38+0.99
2026July+0.48+0.68+0.27+0.85+1.14+0.53-0.22+0.78
2026Aug+0.68+0.76+0.59+0.90+0.60+0.80+0.39+0.71
2026Sep+0.61+0.78+0.44+0.89+1.32+0.80+1.13+0.99
YearMonGlobeNHemSHemTropicUS48ArcticAust.Can.

Time Series Plots for Tropics, USA48, Canada, and Australia

Line graph displaying the UAH satellite-based temperature departures from the 1991-2020 average for the lower atmosphere, with data points from 1979 to 2026. Blue points represent individual measurements, while a red line indicates a running centered 13-month average. The linear trend shows an increase of +0.14 degrees Celsius per decade. Notable data point for September 2026 shows a temperature departure of +0.9 degrees Celsius.
Line graph showing UAH satellite-based temperature departures from the average from 1991-2020 in degrees Celsius, covering years 1979 to 2026, with a red trend line indicating a linear temperature increase of +0.21 C per decade.
Line graph showing the satellite-based temperature departures from the 1991-2020 average in Canada from 1979 to 2026, with blue data points and a red line indicating a centered 13-month average.
Graph depicting UAH satellite-based temperature departures in Australia from 1991-2020 average, showing fluctuations from 1979 to 2026 with a trend line indicating a +0.22 C increase per decade.

The full UAH Global Temperature Report, along with the LT global grid point anomaly map for September 2026 and a more detailed analysis by John Christy, should be available within the next several days here.

The monthly anomalies for various regions for the four deep layers we monitor from satellites will be available in the next several days at the following locations:

Lower Troposphere

Mid-Troposphere

Tropopause

Lower Stratosphere

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