South Portland Weather Forecast 15 Days, Weather in South Portland Today
Current weather conditions and 15 day weather forecast for South Portland, Maine, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at South Portland
| 18 December 2025 Thursday 2.8 ° C / 37°F  Clear |
Feels Like : -0.9 ° C / 30.3°F Humidity : % 59 Pressure : 1019 mb Wind Speed : 14.8 kmph / 9.2 miles from WNW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for South Portland, ME, USA
Weather Forecast for next 15 Days for South Portland including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in South Portland, Maine state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 18 December 2025 Thursday | Sunny |
-0.9 ° C (30.4°F) |
7.6 ° C (45.7°F) |
3.4 ° C (38.1°F) |
% 74 | 0% | 0.2 | Sunrise:07:10 AM Sunset: 04:06 PM |
Moonrise:06:14 AM Moonset: 02:36 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday |  Heavy rain |
2.5 ° C (36.5°F) |
9.6 ° C (49.3°F) |
7.2 ° C (45°F) |
% 90 | 89% | 0 | Sunrise:07:10 AM Sunset: 04:06 PM |
Moonrise:07:13 AM Moonset: 03:23 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday | Sunny |
-5.3 ° C (22.5°F) |
1.1 ° C (34°F) |
-1.5 ° C (29.3°F) |
% 59 | 0% | 0.2 | Sunrise:07:11 AM Sunset: 04:07 PM |
Moonrise:08:05 AM Moonset: 04:18 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday |  Patchy rain nearby |
-1.7 ° C (29°F) |
5 ° C (41°F) |
1.8 ° C (35.3°F) |
% 66 | 87% | 0.2 | Sunrise:07:11 AM Sunset: 04:07 PM |
Moonrise:08:48 AM Moonset: 05:22 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday | Sunny |
-5.5 ° C (22°F) |
-2.5 ° C (27.5°F) |
-3.3 ° C (26.1°F) |
% 52 | 0% | 0 | Sunrise:07:12 AM Sunset: 04:08 PM |
Moonrise:09:24 AM Moonset: 06:29 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday |  Partly Cloudy |
-7.4 ° C (18.7°F) |
-2.2 ° C (28°F) |
-4.5 ° C (24°F) |
% 45 | 0% | 2 | Sunrise:07:12 AM Sunset: 04:08 PM |
Moonrise:09:52 AM Moonset: 07:39 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday |  Patchy moderate snow |
-3.8 ° C (25.1°F) |
-0 ° C (32°F) |
-1.7 ° C (28.9°F) |
% 65 | 81% | 1 | Sunrise:07:13 AM Sunset: 04:09 PM |
Moonrise:10:16 AM Moonset: 08:48 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday | Sunny |
-4 ° C (24.7°F) |
-0.4 ° C (31.3°F) |
-2.2 ° C (28°F) |
% 63 | 0% | 2 | Sunrise:07:13 AM Sunset: 04:09 PM |
Moonrise:10:37 AM Moonset: 09:58 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Partly Cloudy |
-5.8 ° C (21.5°F) |
-2.6 ° C (27.4°F) |
-3.7 ° C (25.3°F) |
% 49 | 0% | 2 | Sunrise:07:13 AM Sunset: 04:10 PM |
Moonrise:10:56 AM Moonset: 11:08 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Patchy rain nearby |
-0.7 ° C (30.7°F) |
3.6 ° C (38.6°F) |
2.1 ° C (35.7°F) |
% 86 | 70% | 1 | Sunrise:07:14 AM Sunset: 04:11 PM |
Moonrise:11:16 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Sunny |
-7.9 ° C (17.8°F) |
-1.6 ° C (29.1°F) |
-3 ° C (26.5°F) |
% 55 | 0% | 2 | Sunrise:07:14 AM Sunset: 04:11 PM |
Moonrise:11:37 AM Moonset: 12:20 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 December 2025 Monday | Sunny |
-9 ° C (15.8°F) |
-3.8 ° C (25.1°F) |
-6.5 ° C (20.2°F) |
% 51 | 0% | 2 | Sunrise:07:14 AM Sunset: 04:12 PM |
Moonrise:12:01 PM Moonset: 01:36 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 December 2025 Tuesday | Patchy moderate snow |
-6.2 ° C (20.8°F) |
-2.1 ° C (28.2°F) |
-4 ° C (24.9°F) |
% 53 | 69% | 1 | Sunrise:07:14 AM Sunset: 04:13 PM |
Moonrise:12:31 PM Moonset: 02:56 AM Moon Phase ( Waxing Gibbous ) |
|
| 31 December 2025 Wednesday | Patchy rain nearby |
-0.2 ° C (31.6°F) |
1.6 ° C (34.8°F) |
1.1 ° C (33.9°F) |
% 96 | 86% | 1 | Sunrise:07:14 AM Sunset: 04:14 PM |
Moonrise:01:11 PM Moonset: 04:18 AM Moon Phase ( Waxing Gibbous ) |
|
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