Station CASM1 - 8418150 - Portland, ME
December 19, 2025 12:30 am ESTLocation: 43.656N 70.246W
Wind Direction: NNE (20°)
Wind Speed: 1.9 knots
Wind Gust: 2.9 knots
Atmospheric Pressure: 30.02 in (1016.7 mb)
Air Temperature: 42.3°F (5.7°C)
Water Temperature: 39.0°F (3.9°C)
Overnight - 43°F
Dec 19, 2025
20 mph S
Patchy Fog
Patchy fog between 2am and 3am, then patchy fog and a slight chance of rain between 3am and 4am, then a chance of rain and patchy fog. Cloudy, with a low around 43. South wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Friday - 52°F
Dec 19, 2025
25 to 40 mph S
Rain
Rain likely and patchy fog before 7am, then areas of fog and a chance of rain between 7am and 8am, then rain and areas of fog. Cloudy, with a high near 52. South wind 25 to 40 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night - 30°F
Dec 19, 2025
20 to 30 mph W
Patchy Fog then Partly Cloudy
Patchy fog and a slight chance of rain before 7pm. Partly cloudy, with a low around 30. West wind 20 to 30 mph, with gusts as high as 40 mph. Chance of precipitation is 20%. New rainfall amounts between a tenth and quarter of an inch possible.
Saturday - 39°F
Dec 20, 2025
15 to 25 mph W
Mostly Sunny
Mostly sunny, with a high near 39. West wind 15 to 25 mph, with gusts as high as 35 mph.
Saturday Night - 34°F
Dec 20, 2025
15 to 25 mph SW
Mostly Cloudy then Slight Chance Light Snow
A slight chance of snow between 1am and 2am, then a slight chance of rain. Mostly cloudy, with a low around 34. Southwest wind 15 to 25 mph, with gusts as high as 40 mph.
Sunday - 43°F
Dec 21, 2025
20 to 30 mph SW
Slight Chance Light Rain then Partly Sunny
A slight chance of rain before 8am. Partly sunny, with a high near 43.
Sunday Night - 23°F
Dec 21, 2025
25 mph W
Mostly Clear
Mostly clear, with a low around 23.
Monday - 27°F
Dec 22, 2025
20 to 25 mph NW
Sunny
Sunny, with a high near 27.
Monday Night - 21°F
Dec 22, 2025
10 to 15 mph NW
Partly Cloudy
Partly cloudy, with a low around 21.
Tuesday - 34°F
Dec 23, 2025
10 to 20 mph SW
Chance Light Snow
A chance of snow after 8am. Mostly cloudy, with a high near 34. Chance of precipitation is 50%.
Tuesday Night - 29°F
Dec 23, 2025
15 to 20 mph W
Chance Light Snow
A chance of snow before 3am. Mostly cloudy, with a low around 29. Chance of precipitation is 50%.
Wednesday - 34°F
Dec 24, 2025
15 to 20 mph NW
Mostly Sunny
Mostly sunny, with a high near 34.
Wednesday Night - 24°F
Dec 24, 2025
15 to 20 mph NW
Partly Cloudy
Partly cloudy, with a low around 24.
Christmas Day - 35°F
Dec 25, 2025
10 to 15 mph W
Chance Light Snow
A chance of snow between 9am and 4pm, then a chance of rain and snow. Partly sunny, with a high near 35.