Typically, you can expect that the weather in Lostwithiel during December is 6. Throughout the month you should see a high of 10 and lows being 5 celsius. The table below includes more detail:
| Month | Degrees Celsius |
|---|---|
| Temperature | 6 |
| High Temperature | 10 |
| Low Temperature | 5 |
Useful Links: Lostwithiel Weather: Average Weather & Yearly Climate