Freezing temperatures are expected in East Devon overnight, according to the Met Office.
Temperatures are set to fall to -2°C tonight.
Although today's maximum temperature is expected to be 9 °C with sunny spells breaking through after a cloudy morning, the evening will see frost take hold under clear skies.
Moving further into the week, more cloud is expected on Tuesday, with rain on the way in the late afternoon.
The maximum temperature is predicted to be 8 °C, with low cloud causing murky conditions around coasts and hills.
Wednesday will be dry and bright, but cloudier in the afternoon, while Thursday will see more rain before blustery showers arrive on Friday.
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