Monthly outlook for Portland, CT: average high 58.3°, average low 41.4°. That is 1.3° above the climate normal for October. Precipitation is expected on 2 days (about 2.3 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 30 October (69.7°), the coolest 25 October (32.3°).
58.3°/41.4°
Average high / low
+1.3°
Above normal
2 / 5
Wet days / normal
2.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
25 October – 3 November
60.4°
57.1°
+1.8°
4 November – 13 November
54.7°
52.8°
+1.1°
14 November – 23 November
at normal
48.3°
—
October records over 66 years
87.6°6 October 2007All-time high
22.6°31 October 2020All-time low
Climate normals and records are computed from the nearest reference point — New Britain (11 mi).
Mon, 2668° / 34°0
68 °
Portland, Monday, 26 October
Partly cloudy. High 68°, low 34°.
Pressure30.21 inHg
Wind2.9 mph SW
Humidity53%
Visibility6.2 mi
Dew point43°
Tue, 2752° / 38°0
52 °
Portland, Tuesday, 27 October
Clear. High 52°, low 38°.
Pressure30.39 inHg
Wind7.9 mph N
Humidity51%
Visibility6.2 mi
Dew point32°
Wed, 2856° / 34°0
56 °
Portland, Wednesday, 28 October
Clear. High 56°, low 34°.
Pressure30.47 inHg
Wind0.5 mph SW
Humidity58%
Visibility6.2 mi
Dew point36°
Thu, 2962° / 44°0
62 °
Portland, Thursday, 29 October
Partly cloudy. High 62°, low 44°.
Pressure30.27 inHg
Wind7.5 mph S
Humidity69%
Visibility6.2 mi
Dew point49°
Fri, 3070° / 50°0
70 °
Portland, Friday, 30 October
Overcast. High 70°, low 50°.
Pressure30.06 inHg
Wind5.7 mph SW
Humidity74%
Visibility—
Dew point52°
Sat, 3158° / 43°0
58 °
Portland, Saturday, 31 October
Clear. High 58°, low 43°.
Pressure30.33 inHg
Wind5 mph N
Humidity49%
Visibility—
Dew point33°
Sun, 0158° / 41°0
58 °
Portland, Sunday, 1 November
Overcast. High 58°, low 41°.
Pressure30.36 inHg
Wind4 mph SW
Humidity44%
Visibility—
Dew point30°
Mon, 0264° / 44°0
64 °
Portland, Monday, 2 November
Overcast. High 64°, low 44°.
Pressure30.24 inHg
Wind4 mph NE
Humidity47%
Visibility—
Dew point36°
Tue, 0351° / 44°0
51 °
Portland, Tuesday, 3 November
Overcast. High 51°, low 44°.
Pressure30.33 inHg
Wind15.1 mph NE
Humidity56%
Visibility—
Dew point34°
Wed, 0447° / 45°1.53
47 °
Portland, Wednesday, 4 November
Heavy rain. High 47°, low 45°.
Pressure30.15 inHg
Wind16.9 mph NE
Humidity88%
Visibility—
Dew point42°
Thu, 0550° / 44°0.01
50 °
Portland, Thursday, 5 November
Light rain. High 50°, low 44°.
Pressure29.80 inHg
Wind13.6 mph N
Humidity86%
Visibility—
Dew point40°
Fri, 0658° / 40°0
58 °
Portland, Friday, 6 November
Overcast. High 58°, low 40°.
Pressure29.94 inHg
Wind4.4 mph NW
Humidity43%
Visibility—
Dew point28°
Sat, 0757° / 41°0
57 °
Portland, Saturday, 7 November
Partly cloudy. High 57°, low 41°.
Pressure30.12 inHg
Wind3.7 mph N
Humidity61%
Visibility—
Dew point38°
Sun, 0858° / 43°0
58 °
Portland, Sunday, 8 November
Overcast. High 58°, low 43°.
Pressure29.88 inHg
Wind5.1 mph S
Humidity73%
Visibility—
Dew point43°
Mon, 0958° / 46°0.74
58 °
Portland, Monday, 9 November
Heavy rain. High 58°, low 46°.
Pressure29.56 inHg
Wind16.5 mph SE
Humidity81%
Visibility—
Dew point49°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 1053° / 38°0.15
53 °
Portland, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high53°
Average low38°
Average precipitation0.15 in
Chance of precipitation35%
Record high72° (2020)
Record low24° (2017)
Wed, 1151° / 38°0.15
51 °
Portland, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.15 in
Chance of precipitation40%
Record high69° (2020)
Record low21° (2017)
Thu, 1250° / 37°0.14
50 °
Portland, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.14 in
Chance of precipitation37%
Record high70° (2022)
Record low24° (2019)
Fri, 1349° / 35°0.19
49 °
Portland, Friday, 13 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.19 in
Chance of precipitation40%
Record high70° (1964)
Record low19° (2019)
Sat, 1449° / 35°0.11
49 °
Portland, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.11 in
Chance of precipitation23%
Record high67° (1993)
Record low20° (1986)
Sun, 1550° / 35°0.12
50 °
Portland, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.12 in
Chance of precipitation42%
Record high73° (1993)
Record low21° (1967)
Mon, 1650° / 35°0.13
50 °
Portland, Monday, 16 November
Climate normal for this date — 60-year average.
Average high50°
Average low35°
Average precipitation0.13 in
Chance of precipitation32%
Record high67° (2001)
Record low19° (1967)
Tue, 1749° / 34°0.12
49 °
Portland, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.12 in
Chance of precipitation28%
Record high64° (2006)
Record low22° (2019)
Wed, 1849° / 34°0.08
49 °
Portland, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.08 in
Chance of precipitation25%
Record high66° (1963)
Record low23° (1997)
Thu, 1949° / 34°0.06
49 °
Portland, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.06 in
Chance of precipitation18%
Record high63° (1991)
Record low16° (1986)
Fri, 2048° / 34°0.13
48 °
Portland, Friday, 20 November
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.13 in
Chance of precipitation33%
Record high68° (1985)
Record low5° (1986)
Sat, 2147° / 33°0.1
47 °
Portland, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.1 in
Chance of precipitation33%
Record high61° (1999)
Record low16° (1987)
Sun, 2246° / 33°0.12
46 °
Portland, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.12 in
Chance of precipitation37%
Record high63° (2007)
Record low11° (2018)
Mon, 2346° / 32°0.13
46 °
Portland, Monday, 23 November
Climate normal for this date — 60-year average.
Average high46°
Average low32°
Average precipitation0.13 in
Chance of precipitation23%
Record high65° (1992)
Record low12° (2018)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Portland, CT are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Portland, CT since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.