Manual rain gauge facilitating accurate metering of precipitation in time period

The invention mainly relates to a manual rain gauge facilitating accurate metering of precipitation in a time period. The manual rain gauge comprises a rain container, a funnel, a water conduit located below the funnel and provided with a valve, a side door provided with a glass observation window, a water storage cylinder provided with a flanged doorframe, a water storage bottle provided with a bottle cap and the like, wherein the valve arranged in the middle of the water conduit below the funnel can control water from the rain container to be injected into the water storage bottle downwardsthrough the water conduit or not; when the water storage bottle in the water storage cylinder is replaced, the rainwater in the rain container can be maintained in the rain container by opening the side door of the water storage cylinder and rotating the valve in the middle of the water conduit to be in an "off" state, then the water storage bottle in the water storage cylinder is replaced, and the water storage bottle is