Portland, ME 14-Day Forecast
Maine, United States 🇺🇸
60°
Overcast right now
Today: high 60°, low 53°
Updated 1 hour ago
Portland weather for the next 14 days
Wednesday, September 16
Sunny High 64° Low 56°Precipitation
14%
· 0.0 in
Max wind
17 mph
Humidity
81%
UV index
6 - Moderate
Sunrise / sunset
06:21 AM / 06:50 PM
Thursday, September 17
Overcast High 62° Low 60°Precipitation
87%
· 0.18 in
Max wind
11 mph
Humidity
90%
UV index
6 - Moderate
Sunrise / sunset
06:22 AM / 06:48 PM
Friday, September 18
Overcast High 69° Low 56°Precipitation
41%
· 0.02 in
Max wind
19 mph
Humidity
70%
UV index
5 - Moderate
Sunrise / sunset
06:23 AM / 06:46 PM
Saturday, September 19
Sunny High 56° Low 50°Precipitation
7%
· 0.0 in
Max wind
15 mph
Humidity
59%
UV index
5 - Moderate
Sunrise / sunset
06:25 AM / 06:44 PM
Sunday, September 20
Overcast High 59° Low 52°Precipitation
15%
· 0.0 in
Max wind
13 mph
Humidity
80%
UV index
4 - Moderate
Sunrise / sunset
06:26 AM / 06:42 PM
Monday, September 21
Patchy rain nearby High 58° Low 54°Precipitation
77%
· 0.07 in
Max wind
11 mph
Humidity
90%
UV index
3 - Moderate
Sunrise / sunset
06:27 AM / 06:40 PM
Tuesday, September 22
Sunny High 60° Low 54°Precipitation
10%
· 0.0 in
Max wind
9 mph
Humidity
77%
UV index
5 - Moderate
Sunrise / sunset
06:28 AM / 06:39 PM
Wednesday, September 23
Sunny High 56° Low 53°Precipitation
10%
· 0.0 in
Max wind
12 mph
Humidity
70%
UV index
4 - Moderate
Sunrise / sunset
06:29 AM / 06:37 PM
Thursday, September 24
Overcast High 61° Low 55°Precipitation
18%
· 0.0 in
Max wind
12 mph
Humidity
73%
UV index
4 - Moderate
Sunrise / sunset
06:30 AM / 06:35 PM
Friday, September 25
Patchy rain nearby High 64° Low 60°Precipitation
92%
· 0.51 in
Max wind
20 mph
Humidity
95%
UV index
4 - Moderate
Sunrise / sunset
06:31 AM / 06:33 PM
Saturday, September 26
Light rain shower High 65° Low 63°Precipitation
94%
· 0.83 in
Max wind
28 mph
Humidity
97%
UV index
4 - Moderate
Sunrise / sunset
06:32 AM / 06:31 PM
Sunday, September 27
Overcast High 65° Low 61°Precipitation
50%
· 0.01 in
Max wind
15 mph
Humidity
93%
UV index
4 - Moderate
Sunrise / sunset
06:34 AM / 06:29 PM
Monday, September 28
Patchy rain nearby High 61° Low 57°Precipitation
56%
· 0.02 in
Max wind
14 mph
Humidity
80%
UV index
3 - Moderate
Sunrise / sunset
06:35 AM / 06:28 PM
Portland 14-day outlook: the story
The warmest day of Portland's 14-day outlook is Friday, September 18 with a high near 69°F (21°C); the coolest night comes Saturday, September 19, dipping to 50°F (10°C). Temperatures hold fairly steady from week to week. Highs over the next two weeks average 61°F (16°C), about 10°F (6°C) below the typical September high of 71°F (22°C).
Precipitation is most likely on Thursday 17, Monday 21, Friday 25, Saturday 26 and beyond; the wettest day looks like Saturday, September 26 with about 0.83 in (21.0 mm) expected. For the weekend, expect Saturday 56°F (14°C) and sunny / Sunday 59°F (15°C) and overcast.
For typical conditions month by month, see the Portland climate & average temperatures guide.
Portland forecast questions
Will it rain in Portland this week?
The forecast currently shows meaningful precipitation chances on 6 of the next 14 days, peaking around Saturday, September 26.
What will be the warmest day in Portland over the next 14 days?
Friday, September 18, with a forecast high near 69°F (21°C).
How accurate is a 14-day forecast for Portland?
Days 1-3 are highly reliable, days 4-7 capture the overall pattern well, and days 8-14 indicate trends rather than exact figures - check back as the date approaches; this page refreshes throughout the day.
Average temperatures in Portland by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 33° | 19° | 10 | 4.1 in | 5.9 h/day | 68% |
| February | 35° | 18° | 9 | 3.2 in | 6.9 h/day | 69% |
| March | 42° | 26° | 11 | 3.8 in | 8.0 h/day | 67% |
| April | 51° | 36° | 11 | 4.5 in | 8.2 h/day | 70% |
| May | 63° | 47° | 9 | 2.7 in | 10.1 h/day | 72% |
| June | 72° | 57° | 11 | 3.8 in | 11.1 h/day | 76% |
| July | 78° | 64° | 10 | 3.8 in | 11.3 h/day | 77% |
| August | 77° | 63° | 11 | 3.6 in | 10.8 h/day | 78% |
| September | 71° | 57° | 8 | 3.4 in | 9.4 h/day | 78% |
| October | 60° | 47° | 9 | 4.5 in | 7.1 h/day | 77% |
| November | 47° | 35° | 9 | 3.8 in | 6.5 h/day | 71% |
| December | 38° | 26° | 11 | 5.0 in | 5.7 h/day | 72% |
14-day forecasts nearby