‹ Portland, Maine weather by month
Typical December weather
Portland, Maine
Maine · December
38° days
22° nights
about 6 snowy days · 9 hours of daylight · ocean 42°
What to pack
- Warm coat
- Gloves & beanie
- Snow boots
What December feels like
Sunset comes just after four here in December, which is a genuine adjustment for anyone from further south. Snow gets serious again, and the coastal storms that bring it can swing to rain instead — the city keeps a snow-emergency parking ban ready either way.
Winter is doing its thing: 14.6 in of snow in a typical December, with fresh snow on about 6 days. Nearly every night dips below freezing.
Can you swim?
The ocean runs about 42° — frigid — locals in wetsuits only.
The numbers
| Typical high | 38° |
|---|---|
| Typical low | 22° |
| Days with snow | 6 |
| Rain and melted snow | 4.5 in |
| Snowfall | 14.6 in |
| Humidity | dry air |
| Water temperature | 42° |
| Sunrise / sunset (mid-month) | 7:07 am / 4:04 pm |