On 2 September, during the Battle of Mont Saint-Quentin, the 43rd Battalion was tasked with clearing trenches north of the village of Allaines. It captured Graz Trench opposite Allaines without a fight, then using hand grenades (known as bombs), fought northwards towards Scutari Trench, and succeeded in containing about 150 Germans at a fork in the trench. Faced with a deluge of German fire, the troops halted and a deadlock ensued, which was broken by Weathers, supported by three other men. His actions on that day resulted in a recommendation for the award of the Victoria Cross, the highest award for gallantry in battle that could be awarded to a member of the Australian armed forces at the time. The citation read:
For most conspicuous gallantry and devotion to duty on the 2nd of September 1918, north of Peronne, when with an advanced bombing party. The attack having been held up by a strongly-held trench, Corporal Weathers went forward alone, under heavy fire, and attacked the enemy with bombs. Then, returning to our lines for a further supply of bombs, he again went forward with three comrades and attacked under very heavy fire. Regardless of personal danger, he mounted the enemy parapet and bombed the trench, and, with the support of his comrades, captured 180 prisoners and three machine guns. His valour and determination resulted in the successful capture of the final objective, and saved the lives of many of his comrades.