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Portland, ME Weather Forecast | 5 Day

Updated: Thu Sep 24th 2026 4:30 PM EDT

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Sunny

Thu 9-24-26

Sunny with a high of 58°F and a low of 50°F. There's a very small chance of rainfall, only about 7%. Wind will be moderate, blowing around 13mph on average and gusts of 8.5mph at 10 PM. The humidity will be on the higher side, averaging about 68%, the maximum being 68% at 11 PM and 62% being its lowest at 6 PM. Barometric pressure is its highest of 30.38^inHg at 6 PM, a lowest point of 30.36^inHg at 11 PM with an avg 30.38^inHg.

HI: 58°F
LO: 50°F

Rainfall: 7%
Snowfall: 0%

Wind
12.5 mph
Humidity
68% avg.

UV Index
4.8
Air Quality
Good

Sunrise
06:30 AM
Sunset
06:35 PM

Moonrise
05:42 PM
Moonset
04:22 AM
Moon Phase
Full Moon

Overcast

Weather Tomorrow, Fri 9-25-26

Overcast with a high of 62°F and a low of 54°F. Rainfall expected to have a 51% chance with an estimated 0.02in. Wind will be moderate, blowing around 20mph on average and gusts of 34.2mph at 6 PM. The humidity will be on the higher side, averaging about 72%, the maximum being 82% at 8 PM and 62% being its lowest at 2 PM. Barometric pressure is its highest of 30.34^inHg at 12 AM, a lowest point of 30.11^inHg at 11 PM with an avg 30.21^inHg.

HI: 62°F
LO: 54°F

Rainfall: 51% | est. 0.02in
Snowfall: 0%

Wind
19.5 mph
Humidity
72% avg.

UV Index
3.4
Air Quality
Good

Sunrise
06:31 AM
Sunset
06:33 PM

Moonrise
06:00 PM
Moonset
05:26 AM
Moon Phase
Full Moon

Light Rain Shower

Sat 9-26-26

Light Rain Shower with a high of 57°F and a low of 54°F. It will likey rain, having a 92% chance of a downpour with an estimated 1.49in. Winds will be strong at speeds peaking at 29mph and gusts of 46.6mph at 6 PM. High humidity with average of 90% is anticipated, the maximum being 94% at 12 PM and 84% being its lowest at 12 AM. Barometric pressure is its highest of 30.09^inHg at 12 AM, a lowest point of 29.82^inHg at 11 PM with an avg 29.93^inHg.

HI: 57°F
LO: 54°F

Rainfall: 92% | est. 1.49in
Snowfall: 0%

Wind
28.9 mph
Humidity
90% avg.

UV Index
0.3
Air Quality
Good

Sunrise
06:32 AM
Sunset
06:31 PM

Moonrise
06:18 PM
Moonset
06:30 AM
Moon Phase
Full Moon

Light Rain Shower

Sun 9-27-26

Light Rain Shower with a high of 57°F and a low of 56°F. It will likey rain, having a 93% chance of a downpour with an estimated 0.71in. Winds will be strong at speeds peaking at 28mph and gusts of 43.2mph at 2 AM. High humidity with average of 95% is anticipated, the maximum being 96% at 12 PM and 91% being its lowest at 11 PM. Barometric pressure is its highest of 29.93^inHg at 11 PM, a lowest point of 29.8^inHg at 4 AM with an avg 29.86^inHg.

HI: 57°F
LO: 56°F

Rainfall: 93% | est. 0.71in
Snowfall: 0%

Wind
27.3 mph
Humidity
95% avg.

UV Index
0.5
Air Quality
Good

Sunrise
06:34 AM
Sunset
06:29 PM

Moonrise
06:37 PM
Moonset
07:36 AM
Moon Phase
Waning Gibbous

Light Rain Shower

Mon 9-28-26

Light Rain Shower with a high of 57°F and a low of 52°F. It will likey rain, having a 91% chance of a downpour with an estimated 0.52in. Winds will be strong at speeds peaking at 21mph and gusts of 32.5mph at 4 AM. High humidity with average of 89% is anticipated, the maximum being 94% at 11 AM and 82% being its lowest at 7 AM. Barometric pressure is its highest of 29.94^inHg at 9 AM, a lowest point of 29.78^inHg at 2 PM with an avg 29.9^inHg.

HI: 57°F
LO: 52°F

Rainfall: 91% | est. 0.52in
Snowfall: 0%

Wind
20.4 mph
Humidity
89% avg.

UV Index
0.6
Air Quality
Good

Sunrise
06:35 AM
Sunset
06:28 PM

Moonrise
07:00 PM
Moonset
08:44 AM
Moon Phase
Waning Gibbous

Scattered Showers

Tue 9-29-26

Scattered Showers with a high of 63°F and a low of 56°F. There might be light rainfall having a 22% chance with an estimated 0in. Wind will be moderate, blowing around 11mph on average and gusts of 19.9mph at 12 AM. High humidity with average of 82% is anticipated, the maximum being 89% at 11 PM and 74% being its lowest at 2 PM. Barometric pressure is its highest of 30.08^inHg at 8 PM, a lowest point of 29.88^inHg at 12 AM with an avg 30.01^inHg.

HI: 63°F
LO: 56°F

Rainfall: 22% | est. 0in
Snowfall: 0%

Wind
10.3 mph
Humidity
82% avg.

UV Index
5
Air Quality
TBA

Sunrise
06:36 AM
Sunset
06:26 PM

Moonrise
07:27 PM
Moonset
09:55 AM
Moon Phase
Waning Gibbous

Portland, ME Weather Forecast - 10 Day Detailed

This 5-Day weather forecast is relevant for ZIP codes from 04101 through 04124, accurately covering all areas within Portland, ME.

Currently

	58°F	30.41 inHg. Barometer 60% Humidity E 12.6 mph Wind
Sunny

Full Report

National Outlook

Southwest and Central Plains Brace for Heavy Rainfall - 09-24 to 09-26

Thu Sep 24th 2026, 1:36am PDT

Read

Rain and Winds to Hit Northeast; Wet Weather in the West 09-27 to 10-01

Extended Forecast
Thu Sep 24th 2026, 1:37am PDT

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