It is raining while the fugitive Henry rides the train to Stresa, raining when he arrives, and raining while Henry and Catherine spend the night together in his hotel room. The open-boat trip across Lake Maggiore takes place in the rain, with an umbrella used as a sail. (Ominously, the umbrella breaks.) And in Chapter XL, as Henry and Catherine are bidding farewell to their wintertime mountain retreat for the city in which Catherine's baby is to be born, Henry tells us that "In the night it started raining."
Finally, when Henry leaves the hospital for lunch during Catherine's protracted, agonizing delivery, "The day was cloudy but the sun was trying to come through" — a literal ray of hope. During the operation, however, he looks out the window and sees that it is raining. Just after the nurse has told him that the baby is dead, Henry looks outside again and "could see nothing but the dark and the rain falling across the light from the window." At the novel's end, Henry leaves the hospital and walks back to his hotel in the rain. In fact, the final word in A Farewell to Arms is "rain," evidence of weather's important place in the story overall.
Hemingway doesn't quite trust us to detect the rain/snow pattern of symbolism and understand its meaning; therefore he underlines the significance of precipitation in his book by having Catherine tell Henry that she sees them dead in the rain. And so the weather symbolism in A Farewell to Arms is perhaps unnecessarily obvious. Yet Hemingway's use of this literary device is hardly rote symbolism for its own sake. Rain and snow both drive his plot and maintain our interest, as we hold our breaths every time it rains in the novel, praying that Catherine will not perish during that scene. (We know that Henry will survive the rain, because he is the story's narrator.) Thus, while writing a brutally realistic saga of life during wartime, Ernest Hemingway also crafted a novel as literary as the great-war stories that preceded A Farewell to Arms. Arguably it is as powerful as any story ever told.
