The threat of heavy showers hangs over Devon, Cornwall and Somerset today, but bright spells will creep in.
A yellow-grade Met Office warning is in place for heavy rain which is due throughout Tuesday.
The day will begin with scattered showers along with breezy conditions.
Winds could reach up to 60mph, especially along the coastlines.
During the afternoon a band of heavy showers moves in with the threat of thunder.
A spokesperson for the Met Office said: "Frequent showers, some heavy, will bring a further 10-15 mm and locally up to 25 mm rain to parts of southern England later on Monday and into Tuesday.
"There is the risk of up to 40 mm of rain on the high ground of southwest."
Inbetween the downpours bright or sunny spells are likely throughout the day with a maximum temperature of 8°c.
Tonight will bring further scattered showers, still heavy at times.
There will be some clear spells and it may be cold enough for patchy ice in some areas, although winds will become lighter.
Temperatures will reach a low of 2°c.
On Wednesday the winds will slowly become easterly, with outbreaks of rain spreading westwards.
It should become drier in the afternoon but it will feel cold, with a maximum temperature of 8°c.