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Shaded-relief atlas plate of Portland, Connecticut: rivers, roads, the city limits and where the water drains.
CONNECTICUT · LOWER CONNECTICUT RIVER VALLEY PLANNING REGION

Portland

5,813 people, 390 ft above sea level in Lower Connecticut River Valley Planning Region.

390 ftElevation, city center
5,813People, 2024 estimate
6 sq miLand area
Sunny 67°
Sunny now Dew point 58° · Calm · high 66°
City of Portland River Interstate 2 miles
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The Portland plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.

MILE1
TODAY

Today in Portland

NWS forecast and National Blend of Models · updated 4:00 PM EDT
RIGHT NOW Robertson Field Airport (K4B8) · 5:35 PM
Sunny
67° Sunny Feels like 67° · high of 66° near 5 PM
WindCalmno gusts
Humidity75%rising to 100% by morning
Pressure29.98 in →steady
Visibility9 mihazy
CloudsClear
UV index—no forecast
Dew point 58° · Comfortableabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Rain
Friday30% chance · showers
LIKELY AMOUNT—amounts come within 3 days
LAST RAINSept. 281.33 in · 1 dry day
ALERTS & OUTLOOKS
No watches or warnings for Lower Connecticut River Valley Planning Region
NWS Upton and the Storm Prediction Center · checked 5:45 PM
SUN & MOON
↑ 6:44 AM6:36 PM ↓
11 h 51 m of daylight, 3 minutes less than yesterday
Waning gibbous, 88% lit. The Harvest Moon was full Saturday.
AIR & POLLEN
18
GOODAir quality index · ozone
Tomorrow: 39, good. No pollen source yet.

The next three days, hour by hour

Sky: clear, cloudy, night Rain likely National Blend of Models
TUESDAY, SEPT. 29
WEDNESDAY, SEPT. 30
THURSDAY, OCT. 1
FRIDAY, OCT. 2
5p
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
2p
partly cloudy day
partly cloudy night
mostly clear night
mostly clear night
partly cloudy night
mostly sunny
partly cloudy day
partly cloudy day
partly cloudy day
mostly cloudy night
mostly cloudy night
mostly cloudy night
partly cloudy night
partly cloudy day
partly cloudy day
partly cloudy day
partly cloudy day
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy day
partly cloudy day
partly cloudy day
TEMPERATURE °F
66°
54°
73°
60°
76°
65°
CHANCE OF RAIN
50%
WIND, MPH
3
2
1
0
0
0
1
3
2
2
1
1
2
3
7
8
7
5
4
3
3
5
8
9
HOW IT FEELS · DEW POINT
Sticky: dew points 54 to 66°

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 80° / 62°
TUE Sept. 29 Partly cloudy Partly cloudy
66° 53°
0% rain — NW 3 A
WED Sept. 30 Partly cloudy; warmer Partly cloudy; warmer
74° 58°
0% rain — SW 1 B
THU Oct. 1 Partly cloudy Partly cloudy
77° 64°
0% rain — SW 6 C
FRI Oct. 2 Chance of showers Chance of showers
81° 58°
30% rain up to 0.1″ NW 8 B
SAT Oct. 3 Partly cloudy; cooler Partly cloudy; cooler
69° 48°
10% rain — NNE 2 B
SUN Oct. 4 Chance of showers Chance of showers
64° 49°
40% rain up to 0.6″ S 2 C
MON Oct. 5 Mostly sunny Mostly sunny
64° 43°
10% rain — NW 8 C
How sure are we? AModels agree: highs within 4° BSome spread: within 8° CWide spread: check back
Range from the National Blend of Models percentiles · graded on Forecast Scores
AIR MAIL

Where today’s air came from

The air arriving over Portland about 5,000 feet above the ground was over the Atlantic off the Carolinas three days ago, and over New England a day ago, about 1,250 miles back along its path. Near the ground the air came from Canada; at 10,000 feet, from the Atlantic off the Carolinas. Traced back 72 hours through NOAA’s hourly RAP analyses and the GFS beyond them, nine paths at each of three heights.

MILE7
ON THE NETWORK

Around Portland on the Forecast Network

Neighboring plates

New Haven CT · 24 MI 24 miles southwest Springfield MA · 37 MI 37 miles north Brookhaven NY · 53 MI 53 miles south Hempstead NY · 83 MI 83 miles southwest New York NY · 93 MI 93 miles southwest Boston MA · 98 MI 98 miles northeast
FORECASTCITY
Atlas plate of Portland, Connecticut. Explore the plate
CONNECTICUT · LOWER CONNECTICUT RIVER VALLEY

Portland

5,813 people, 390 ft above sea level in Lower Connecticut River Valley Planning Region.

390 ftElevation
5,813People
6 sq miLand
Sunny 67°
SunnyDew point 58°
1

Today in Portland

NEXT 15 HOURS
Now partly cloudy day 66° 0%
8p partly cloudy night 61° 0%
11p partly cloudy night 58° 0%
2a mostly clear night 56° 0%
5a partly cloudy night 55° 0%
8a mostly sunny 56° 0%
Rain
NEXT RAINFriday · 30%
→
Tue0%
Partly cloudy Partly cloudy
53
66
A
Wed0%
Partly cloudy; warmer Partly cloudy; warmer
58
74
B
Thu0%
Partly cloudy Partly cloudy
64
77
C
Fri30%
Chance of showers Chance of showers
58
81
B
Sat10%
Partly cloudy; cooler Partly cloudy; cooler
48
69
B
Sun40%
Chance of showers Chance of showers
49
64
C
Mon10%
Mostly sunny Mostly sunny
43
64
C
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
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