Devon climate by month
Warmest month: July (highs about 21°C). Coolest: January (about 10°C). Wettest: October (102 mm). Driest: July (46 mm).
Source: Met Office, Teignmouth, 1991-2020 averages (Open Government Licence v3.0). Daylight is calculated from the latitude of Devon for the 15th of each month. Teignmouth is a coastal station between Exeter and Torbay. The 1991-2020 table for Exeter Airport leaves out days of rain, so Teignmouth, which publishes every column, is used. Dartmoor and Exmoor are higher, colder and wetter, and Plymouth and the north coast differ too.