According to the global climate summary released yesterday by NOAA, 2017 was the third warmest year on record, and the warmest on record when you consider that the two years with higher temperatures were both El Nino years, when global temperatures are generally higher. NASA released their own numbers this week and they generally agree with NOAA’s values, although since they measure with satellites instead of surface observations they are slightly different. You can read the NOAA report at https://www.ncei.noaa.gov/news/global-climate-201712.
You can read more at EarthSky about both NOAA and NASA records here.
