"exposure to rain" is a correct phrase in written English.
You can use it to refer to the amount of time somebody or something has been exposed to the rain. For example: "The plants in the garden had been exposed to rain for many hours, causing them to become waterlogged."
It also weathered exposure to rain.
Will exposure to rain hurt home's framing lumber?
Occasionally the quiet of the park is interrupted by a toy, ravaged by exposure to rain, sand and young fingers, issuing a muffled mechanical gasp.
None of the eight horses in the Preakness have had much exposure to rain, although Captain Steve won the Breeders' Futurity at Keeneland last October on a sloppy track.
The conservators' task was to assess precisely what kinds of damage the art had sustained, not just from the earthquake but from subsequent exposure to rain and sun and from improper storage both before and after the quake.
Fruiting body 35-70 mm high X 24-75 mm wide, circular to ovoid, most with short, narrowed base, one ±sessile; outer peridium granular-furfuraceous overall initially, tending to remain so on the sides and lower potions, the upper portion breaking into geometric patches (areolate), whitish, becoming pale brownish-gray with exposure to rain; inner peridium brownish-white.
Puerto Rico has a tropical climate with little seasonal variation, although local conditions vary according to elevation and exposure to rain-bearing winds.
This is mainly due to a contrast between exposure to rain-bearing winds and shadowing from them but may also reflect long-term history.
Afterwards, the images produced for the relative exposure to driving rain at the examined sites by (a) the annual driving rain indices based on daily data and (b) the indices used to assess the rain load during wetting periods, are compared; these images are found to be highly correlated for Greece.
In this paper, parameters related to building components' exposure to driving rain in Greece are investigated.
