After a previous shaking episode, when she met visiting Ukrainian President Volodymyr Zelenskiy on June 18, Merkel said she felt better after drinking some water.
But the temperature in Berlin today only reached a mild 18C.
"This is obviously not completed but I have made progress and will have to live with this for a while". Angela Merkel Spotted Trembling for The Second Time in 10 Days; Video of German Chancellor Unsteady Alongside President Frank-Walter Steinmeier Goes Viral.
"I am doing well", Merkel said with a smile. "I have recently said that I am working through what happened during the military honors with President Zelensky". "I am feeling very well, and there is no reason for concern", she said on Wednesday. "I am convinced - just as the reaction has occurred, it will also pass away again".
She blamed the first bout of shaking on dehydration, but a second episode came a week later at the end of June, hours before she boarded a plane for the G20 Summit in Osaka, Japan.
"Angela Merkel's health is now a political issue", said Germany's largest selling daily Bild.
Public figures' health is generally regarded as a private matter in Germany and the country's privacy laws are very strict on that type of information.
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The chancellor has a reputation for stamina garnered in years of late-night domestic and European negotiating marathons.
"I have already said that I am going through a phase of processing the recent military honours with President Zelenskiy", the chancellor said on Wednesday.
Earlier that same year, she fractured her pelvis while cross-country skiing in Switzerland and was ordered to cut back her schedule dramatically and stay in bed as much as possible for three weeks.
A spokeswoman for Merkel, Ulrike Demmer, declined to comment on whether there had been any other shaking episodes beyond the three publicly known ones.
She gave up the leadership of her centre-right party after a pair of poor state election performances that followed a rocky start to her fourth-term government. She is due to step down from her post when her term ends in 2021.
She seemed to grimace as she clutched her arms, apparently in an effort to hide the shakes.