It was dark, and it rained and rained. From all directions one heard in the darkness the wounded calling, crying, and moaning. The wounded we had with us were likewise moaning and crying. All wanted to have their wounds dressed, but we had no more bandages. We tore off pieces of our dirty shirts and placed the rags on those sickening wounds. Men were dying one after the other. There were no doctors, no bandages; we had nothing whatever. You had to help the wounded and keep the French off at the same time. It was an unbearable, impossible state of things. It rained harder and harder. We were wet to our skins. We fired blindly into the darkness. The rolling fire of rifles increased, then died away, then increased again. We sappers were placed among the infantry. My neighbour gave me a dig in the ribs."

Based on the text, what can the reader determine about the weather during combat?