Monthly outlook for Belfast, ME: average high 55.2°, average low 40.6°. That is 0.2° above the climate normal for October. Precipitation is expected on 6 days (about 2.7 inches), against a normal of 5 days and 2.3 inches. The warmest day looks like 12 October (65.2°), the coolest 20 October (32.3°).
55.2°/40.6°
Average high / low
+0.2°
Above normal
6 / 5
Wet days / normal
2.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 October – 18 October
57.1°
55.7°
+0.8°
19 October – 28 October
52.1°
52.6°
-0.3°
29 October – 7 November
at normal
49.2°
—
October records over 66 years
83.1°6 October 2025All-time high
25.7°31 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Swanville (7 mi).
Sat, 1056° / 41°0
56 °
Belfast, Saturday, 10 October
Clear. High 56°, low 41°.
Pressure30.36 inHg
Wind11.8 mph NW
Humidity47%
Visibility6.2 mi
Dew point29°
Sun, 1161° / 39°0
61 °
Belfast, Sunday, 11 October
Overcast. High 61°, low 39°.
Pressure30.36 inHg
Wind8.2 mph S
Humidity52%
Visibility6.2 mi
Dew point40°
Mon, 1265° / 50°0.44
65 °
Belfast, Monday, 12 October
Rain. High 65°, low 50°.
Pressure29.71 inHg
Wind1.8 mph S
Humidity86%
Visibility3.8 mi
Dew point55°
Tue, 1355° / 45°0.18
55 °
Belfast, Tuesday, 13 October
Light rain. High 55°, low 45°.
Pressure29.97 inHg
Wind9.2 mph NE
Humidity86%
Visibility3.3 mi
Dew point43°
Wed, 1451° / 45°0.72
51 °
Belfast, Wednesday, 14 October
Rain. High 51°, low 45°.
Pressure29.88 inHg
Wind10.1 mph E
Humidity98%
Visibility—
Dew point49°
Thu, 1556° / 40°0
56 °
Belfast, Thursday, 15 October
Clear. High 56°, low 40°.
Pressure30.12 inHg
Wind12.3 mph NW
Humidity52%
Visibility—
Dew point34°
Fri, 1658° / 40°0.32
58 °
Belfast, Friday, 16 October
Rain. High 58°, low 40°.
Pressure30.21 inHg
Wind17.8 mph S
Humidity68%
Visibility—
Dew point42°
Sat, 1760° / 47°0.96
60 °
Belfast, Saturday, 17 October
Rain. High 60°, low 47°.
Pressure29.74 inHg
Wind17.5 mph S
Humidity93%
Visibility—
Dew point56°
Sun, 1849° / 36°0
49 °
Belfast, Sunday, 18 October
Mostly clear. High 49°, low 36°.
Pressure30.09 inHg
Wind12.5 mph NW
Humidity60%
Visibility—
Dew point33°
Mon, 1948° / 32°0
48 °
Belfast, Monday, 19 October
Overcast. High 48°, low 32°.
Pressure30.45 inHg
Wind11.3 mph NW
Humidity42%
Visibility—
Dew point20°
Tue, 2051° / 32°0
51 °
Belfast, Tuesday, 20 October
Partly cloudy. High 51°, low 32°.
Pressure30.53 inHg
Wind4.8 mph NW
Humidity41%
Visibility—
Dew point23°
Wed, 2153° / 35°0
53 °
Belfast, Wednesday, 21 October
Clear. High 53°, low 35°.
Pressure30.45 inHg
Wind6.5 mph N
Humidity55%
Visibility—
Dew point32°
Thu, 2252° / 36°0
52 °
Belfast, Thursday, 22 October
Overcast. High 52°, low 36°.
Pressure30.27 inHg
Wind8.4 mph S
Humidity64%
Visibility—
Dew point34°
Fri, 2357° / 47°0.11
57 °
Belfast, Friday, 23 October
Light rain. High 57°, low 47°.
Pressure29.97 inHg
Wind11.4 mph S
Humidity90%
Visibility—
Dew point49°
Sat, 2451° / 38°0
51 °
Belfast, Saturday, 24 October
Mostly clear. High 51°, low 38°.
Pressure30.09 inHg
Wind11.1 mph NW
Humidity53%
Visibility—
Dew point31°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 2552° / 42°0.13
52 °
Belfast, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.13 in
Chance of precipitation35%
Record high71° (1963)
Record low31° (2018)
Mon, 2651° / 41°0.2
51 °
Belfast, Monday, 26 October
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.2 in
Chance of precipitation38%
Record high73° (1963)
Record low29° (2018)
Tue, 2751° / 40°0.13
51 °
Belfast, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.13 in
Chance of precipitation33%
Record high71° (1963)
Record low28° (1976)
Wed, 2851° / 39°0.19
51 °
Belfast, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.19 in
Chance of precipitation35%
Record high76° (2023)
Record low28° (1974)
Thu, 2950° / 38°0.11
50 °
Belfast, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.11 in
Chance of precipitation28%
Record high66° (1989)
Record low28° (1965)
Fri, 3048° / 37°0.14
48 °
Belfast, Friday, 30 October
Climate normal for this date — 60-year average.
Average high48°
Average low37°
Average precipitation0.14 in
Chance of precipitation28%
Record high64° (1989)
Record low28° (1962)
Sat, 3150° / 38°0.11
50 °
Belfast, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.11 in
Chance of precipitation23%
Record high73° (2024)
Record low26° (2020)
Sun, 0151° / 39°0.11
51 °
Belfast, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.11 in
Chance of precipitation35%
Record high71° (2024)
Record low28° (1992)
Mon, 0249° / 39°0.17
49 °
Belfast, Monday, 2 November
Climate normal for this date — 60-year average.
Average high49°
Average low39°
Average precipitation0.17 in
Chance of precipitation33%
Record high60° (2001)
Record low23° (2002)
Tue, 0349° / 38°0.24
49 °
Belfast, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high49°
Average low38°
Average precipitation0.24 in
Chance of precipitation45%
Record high65° (2017)
Record low22° (2002)
Wed, 0449° / 38°0.07
49 °
Belfast, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high49°
Average low38°
Average precipitation0.07 in
Chance of precipitation30%
Record high65° (1990)
Record low24° (2020)
Thu, 0549° / 38°0.15
49 °
Belfast, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high49°
Average low38°
Average precipitation0.15 in
Chance of precipitation38%
Record high69° (2022)
Record low24° (1965)
Fri, 0648° / 38°0.15
48 °
Belfast, Friday, 6 November
Climate normal for this date — 60-year average.
Average high48°
Average low38°
Average precipitation0.15 in
Chance of precipitation40%
Record high72° (2024)
Record low28° (1987)
Sat, 0748° / 37°0.05
48 °
Belfast, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high48°
Average low37°
Average precipitation0.05 in
Chance of precipitation25%
Record high71° (2022)
Record low17° (2002)
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 Belfast, ME 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 Belfast, ME 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.