A plant takes up water through its roots at about the same rate as it loses water by transpiration, so anything that changes the rate of transpiration also changes the rate of water uptake. Transpiration speeds up when water vapour can diffuse out of the leaf more quickly, or when stomata are more open.
Light intensity. In brighter light the stomata open wider, so more water vapour can diffuse out. A higher light intensity gives a faster rate of water uptake. In the dark the stomata close and the rate falls to a very low level.
Air movement. Moving air carries away the water vapour that collects around the leaf. This keeps the concentration of water vapour outside the leaf low, so the concentration gradient stays steep and diffusion continues quickly. More air movement gives a faster rate of water uptake. In still air, humid air builds up around the leaf and the rate falls.
Temperature. A higher temperature gives particles more energy, so water evaporates from the cells faster and the vapour diffuses out faster. A higher temperature gives a faster rate of water uptake.