“雨水”节气到，气温回升

Group 1 - The core viewpoint of the article highlights the arrival of the "Rain Water" solar term, indicating a significant temperature rise across Gansu Province, with daytime temperatures in Lanzhou expected to reach 18°C [1] - The "Rain Water" term signifies the melting of ice and snow, marking the beginning of increased precipitation and a transition in weather patterns, although it does not guarantee heavy rain on that day [1] - The article notes that while temperatures are rising, the weather remains unpredictable, with the potential for cold snaps and varying conditions, particularly in northern regions [1] Group 2 - The weather forecast for the city indicates cloudy weather on the 18th with temperatures ranging from -4°C to 10°C, transitioning to clearer skies on the 19th with temperatures between -3°C and 13°C, and sunny conditions on the 20th with temperatures reaching up to 18°C [2]