Monthly outlook for Mainstream, ME: average high 56.5°, average low 42.4°. That is 0° above the climate normal for October. Precipitation is expected on 6 days (about 2.7 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 11 October (71.5°), the coolest 13 October (33.7°).
56.5°/42.4°
Average high / low
+0°
Above normal
6 / 5
Wet days / normal
2.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
7 October – 16 October
56.5°
57.7°
-0.7°
17 October – 26 October
56.5°
53.8°
+1.5°
27 October – 5 November
at normal
49.9°
—
October records over 66 years
83.3°6 October 2025All-time high
21.9°30 October 1962All-time low
Climate normals and records are computed from the nearest reference point — Canaan (13 mi).
Thu, 0860° / 44°0.22
60 °
Mainstream, Thursday, 8 October
Rain. High 60°, low 44°.
Pressure29.71 inHg
Wind6.1 mph SW
Humidity72%
Visibility6.2 mi
Dew point49°
Fri, 0957° / 42°0
57 °
Mainstream, Friday, 9 October
Overcast. High 57°, low 42°.
Pressure29.94 inHg
Wind10.1 mph W
Humidity50%
Visibility6.2 mi
Dew point39°
Sat, 1056° / 35°0
56 °
Mainstream, Saturday, 10 October
Clear. High 56°, low 35°.
Pressure30.36 inHg
Wind10.6 mph NW
Humidity43%
Visibility6.2 mi
Dew point30°
Sun, 1172° / 44°0
72 °
Mainstream, Sunday, 11 October
Overcast. High 72°, low 44°.
Pressure30.12 inHg
Wind7.4 mph SW
Humidity49%
Visibility6.2 mi
Dew point46°
Mon, 1263° / 56°0.05
63 °
Mainstream, Monday, 12 October
Light rain. High 63°, low 56°.
Pressure29.80 inHg
Wind9.9 mph S
Humidity72%
Visibility—
Dew point53°
Tue, 1352° / 34°0.8
52 °
Mainstream, Tuesday, 13 October
Snow. High 52°, low 34°.
Pressure30.03 inHg
Wind11.7 mph E
Humidity85%
Visibility—
Dew point34°
Wed, 1445° / 39°1.09
45 °
Mainstream, Wednesday, 14 October
Rain. High 45°, low 39°.
Pressure29.53 inHg
Wind13.7 mph N
Humidity96%
Visibility—
Dew point39°
Thu, 1547° / 41°0.23
47 °
Mainstream, Thursday, 15 October
Light rain. High 47°, low 41°.
Pressure30.15 inHg
Wind14.4 mph N
Humidity87%
Visibility—
Dew point39°
Fri, 1654° / 40°0
54 °
Mainstream, Friday, 16 October
Overcast. High 54°, low 40°.
Pressure30.12 inHg
Wind8.3 mph NE
Humidity83%
Visibility—
Dew point43°
Sat, 1762° / 47°0
62 °
Mainstream, Saturday, 17 October
Overcast. High 62°, low 47°.
Pressure30.09 inHg
Wind4 mph NE
Humidity82%
Visibility—
Dew point52°
Sun, 1860° / 56°0
60 °
Mainstream, Sunday, 18 October
Light rain. High 60°, low 56°.
Pressure29.97 inHg
Wind3.4 mph NE
Humidity96%
Visibility—
Dew point57°
Mon, 1957° / 49°0.31
57 °
Mainstream, Monday, 19 October
Rain. High 57°, low 49°.
Pressure29.74 inHg
Wind9 mph NW
Humidity99%
Visibility—
Dew point57°
Tue, 2055° / 40°0
55 °
Mainstream, Tuesday, 20 October
Overcast. High 55°, low 40°.
Pressure29.83 inHg
Wind12.4 mph W
Humidity59%
Visibility—
Dew point39°
Wed, 2154° / 37°0
54 °
Mainstream, Wednesday, 21 October
Overcast. High 54°, low 37°.
Pressure30.00 inHg
Wind6.8 mph NE
Humidity59%
Visibility—
Dew point34°
Thu, 2251° / 40°0.01
51 °
Mainstream, Thursday, 22 October
Light rain. High 51°, low 40°.
Pressure30.12 inHg
Wind8.8 mph N
Humidity79%
Visibility—
Dew point39°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2353° / 39°0.15
53 °
Mainstream, Friday, 23 October
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.15 in
Chance of precipitation30%
Record high71° (1979)
Record low28° (1969)
Sat, 2453° / 39°0.16
53 °
Mainstream, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.16 in
Chance of precipitation32%
Record high74° (1963)
Record low26° (1969)
Sun, 2553° / 39°0.12
53 °
Mainstream, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.12 in
Chance of precipitation30%
Record high75° (1963)
Record low28° (1981)
Mon, 2652° / 39°0.15
52 °
Mainstream, Monday, 26 October
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.15 in
Chance of precipitation37%
Record high76° (1963)
Record low27° (2018)
Tue, 2751° / 38°0.11
51 °
Mainstream, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.11 in
Chance of precipitation30%
Record high72° (1963)
Record low25° (2018)
Wed, 2852° / 37°0.16
52 °
Mainstream, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.16 in
Chance of precipitation32%
Record high75° (2023)
Record low26° (2024)
Thu, 2951° / 36°0.11
51 °
Mainstream, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.11 in
Chance of precipitation30%
Record high68° (1989)
Record low27° (1965)
Fri, 3049° / 35°0.13
49 °
Mainstream, Friday, 30 October
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.13 in
Chance of precipitation25%
Record high68° (1989)
Record low22° (1962)
Sat, 3151° / 36°0.11
51 °
Mainstream, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high51°
Average low36°
Average precipitation0.11 in
Chance of precipitation23%
Record high72° (2024)
Record low24° (2020)
Sun, 0151° / 37°0.11
51 °
Mainstream, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.11 in
Chance of precipitation30%
Record high70° (2024)
Record low25° (1972)
Mon, 0249° / 37°0.17
49 °
Mainstream, Monday, 2 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.17 in
Chance of precipitation33%
Record high62° (2001)
Record low22° (2002)
Tue, 0349° / 37°0.21
49 °
Mainstream, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high49°
Average low37°
Average precipitation0.21 in
Chance of precipitation43%
Record high64° (1975)
Record low20° (2002)
Wed, 0449° / 36°0.07
49 °
Mainstream, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.07 in
Chance of precipitation28%
Record high67° (1990)
Record low22° (2020)
Thu, 0548° / 35°0.13
48 °
Mainstream, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.13 in
Chance of precipitation32%
Record high70° (2022)
Record low23° (1986)
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 Mainstream, 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 Mainstream, 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.