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What helps the most is steady precipitation for longer, which gives time for water to soak into the plants and into the ground and not run off.. Inches Precipitation Climate Sites Water Year Precipitation (Since Oct 1) and Percent of Normal as of 139AM MAR23 Normal Precipitation Since Oct 1 2022/2023 Observed Precipitation Since Oct 1 North Bend OR Roseburg OR Medford OR Klamath cities, . WebThis report shows the past weather for Portland, providing a weather history for 2021. The hourly reported wind direction, color coded by compass point.