South Portland, Maine Climate
United States
Pop. 25,556 Elev. 10 m / 33 ft
TZ: America/New_York (UTC-4) ·
Summers in South Portland are mild, with July highs around 73°F (23°C), while winters are frigid with February lows of 20°F (-7°C). Wind chill can push winter lows to 11°F (-12°C). Expect around 55 rainy days annually (35.5 in / 902 mm total), with snow on 12 days and 66 in (1683 mm) of annual accumulation. The city averages 126 sunny days per year. Ocean water temperatures reach 68°F (20°C) in summer.
| Temperature | 73°F (23°C) high | 20°F (-7°C) low |
| Feels like | 11°F (-12°C) low | |
| Rain | 55 days | 35.5 in (902 mm) /yr |
| Snow | 12 days | 66.3 in (1683 mm) /yr |
| Sky | 126 sunny | 11 stormy |
| Wind | 4.5 mph (2.0 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Jun, Jul, Aug, Sep
Sky & Air by Month
Cloud cover (%)
48
Jan 55
Feb 64
Mar 66
Apr 74
May 55
Jun 56
Jul 42
Aug 46
Sep 46
Oct 55
Nov 57
Dec Humidity (%)
62
Jan 69
Feb 70
Mar 69
Apr 81
May 79
Jun 79
Jul 74
Aug 80
Sep 73
Oct 70
Nov 71
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 3 mi Portland International Jetport (PWM)
Ski resort 6 mi Riverside Golf Course
National park 24 mi Fort Baldwin State Historic Site
Mountain peak
(5,460 ft) 67 mi Boott Spur
Hospital 2 mi Maine Medical Center
Hiking trail 4 mi Canco Woods
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 31°F 0°C | 21°F -6°C | 0.9 in 23 mm | 7.5 in189 mm | 13 |
| February | 32°F 0°C | 20°F -7°C | 1.1 in 28 mm | 24.6 in626 mm | 9 |
| March | 42°F 6°C | 31°F -1°C | 4.3 in 110 mm | 10.9 in277 mm | 9 |
| April | 50°F 10°C | 39°F 4°C | 5.8 in 148 mm | 5.8 in148 mm | 7 |
| May | 56°F 13°C | 49°F 9°C | 6.6 in 168 mm | — | 6 |
| June | 67°F 20°C | 59°F 15°C | 2.2 in 57 mm | — | 12 |
| July | 73°F 23°C | 65°F 18°C | 1.7 in 43 mm | — | 9 |
| August | 72°F 22°C | 63°F 17°C | 0.7 in 18 mm | — | 16 |
| September | 67°F 20°C | 58°F 15°C | 2.7 in 69 mm | — | 12 |
| October | 58°F 15°C | 49°F 10°C | 3.9 in 99 mm | — | 15 |
| November | 46°F 8°C | 38°F 4°C | 2.8 in 72 mm | 0.5 in14 mm | 8 |
| December | 35°F 1°C | 22°F -5°C | 2.7 in 68 mm | 16.9 in430 mm | 10 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 13 | 0 |
| February | 9 | 0 |
| March | 9 | 0 |
| April | 7 | 2 |
| May | 6 | 3 |
| June | 12 | 0 |
| July | 9 | 1 |
| August | 16 | 1 |
| September | 12 | 1 |
| October | 15 | 1 |
| November | 8 | 0 |
| December | 10 | 2 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 42°F 5°C | 39°F 4°C |
| February | 38°F 3°C | 37°F 3°C |
| March | 39°F 4°C | 37°F 3°C |
| April | 45°F 7°C | 40°F 5°C |
| May | 51°F 11°C | 48°F 9°C |
| June | 62°F 17°C | 60°F 15°C |
| July | 66°F 19°C | 67°F 19°C |
| August | 68°F 20°C | 67°F 20°C |
| September | 64°F 18°C | 64°F 18°C |
| October | 60°F 16°C | 56°F 13°C |
| November | 53°F 12°C | 49°F 9°C |
| December | 46°F 8°C | 42°F 5°C |