Monthly outlook for Stow, MA: average high 59.8°, average low 42.8°. That is 0.3° above the climate normal for October. Precipitation is expected on 6 days (about 1.4 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 14 October (76.6°), the coolest 20 October (32.5°).
59.8°/42.8°
Average high / low
+0.3°
Above normal
6 / 5
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
60.3°
60°
+0.2°
21 October – 30 October
59°
56.8°
+1.3°
31 October – 9 November
at normal
53.5°
—
October records over 66 years
85.8°5 October 2007All-time high
23.4°31 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Groton (13 mi).
Mon, 1271° / 45°0.55
71 °
Stow, Monday, 12 October
Rain. High 71°, low 45°.
Pressure29.77 inHg
Wind2.5 mph N
Humidity64%
Visibility6.2 mi
Dew point52°
Tue, 1365° / 55°0.05
65 °
Stow, Tuesday, 13 October
Light rain. High 65°, low 55°.
Pressure29.97 inHg
Wind6.6 mph SE
Humidity78%
Visibility6.2 mi
Dew point54°
Wed, 1477° / 59°0
77 °
Stow, Wednesday, 14 October
Light rain. High 77°, low 59°.
Pressure29.74 inHg
Wind10.4 mph W
Humidity63%
Visibility6.2 mi
Dew point63°
Thu, 1559° / 44°0
59 °
Stow, Thursday, 15 October
Overcast. High 59°, low 44°.
Pressure30.18 inHg
Wind12.3 mph NW
Humidity52%
Visibility—
Dew point38°
Fri, 1658° / 42°0.22
58 °
Stow, Friday, 16 October
Rain. High 58°, low 42°.
Pressure29.91 inHg
Wind14.9 mph W
Humidity74%
Visibility—
Dew point40°
Sat, 1766° / 47°0.23
66 °
Stow, Saturday, 17 October
Light rain. High 66°, low 47°.
Pressure29.74 inHg
Wind16.4 mph SW
Humidity89%
Visibility—
Dew point53°
Sun, 1846° / 36°0.06
46 °
Stow, Sunday, 18 October
Light rain. High 46°, low 36°.
Pressure29.91 inHg
Wind11.9 mph NW
Humidity75%
Visibility—
Dew point33°
Mon, 1947° / 33°0
47 °
Stow, Monday, 19 October
Clear. High 47°, low 33°.
Pressure30.24 inHg
Wind12.8 mph NW
Humidity41%
Visibility—
Dew point19°
Tue, 2058° / 33°0
58 °
Stow, Tuesday, 20 October
Clear. High 58°, low 33°.
Pressure30.36 inHg
Wind8.1 mph W
Humidity41%
Visibility—
Dew point27°
Wed, 2162° / 40°0
62 °
Stow, Wednesday, 21 October
Clear. High 62°, low 40°.
Pressure30.47 inHg
Wind3.6 mph SE
Humidity54%
Visibility—
Dew point37°
Thu, 2262° / 41°0
62 °
Stow, Thursday, 22 October
Clear. High 62°, low 41°.
Pressure30.45 inHg
Wind6.3 mph S
Humidity58%
Visibility—
Dew point40°
Fri, 2364° / 45°0
64 °
Stow, Friday, 23 October
Overcast. High 64°, low 45°.
Pressure30.18 inHg
Wind9.4 mph NW
Humidity54%
Visibility—
Dew point43°
Sat, 2456° / 43°0
56 °
Stow, Saturday, 24 October
Partly cloudy. High 56°, low 43°.
Pressure30.27 inHg
Wind6.9 mph SE
Humidity62%
Visibility—
Dew point40°
Sun, 2563° / 44°0.01
63 °
Stow, Sunday, 25 October
Light rain. High 63°, low 44°.
Pressure29.94 inHg
Wind12.5 mph SW
Humidity74%
Visibility—
Dew point50°
Mon, 2647° / 38°0
47 °
Stow, Monday, 26 October
Overcast. High 47°, low 38°.
Pressure29.94 inHg
Wind8.5 mph W
Humidity53%
Visibility—
Dew point29°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2756° / 42°0.12
56 °
Stow, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high56°
Average low42°
Average precipitation0.12 in
Chance of precipitation22%
Record high80° (1963)
Record low28° (1976)
Wed, 2856° / 40°0.12
56 °
Stow, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high56°
Average low40°
Average precipitation0.12 in
Chance of precipitation35%
Record high78° (2023)
Record low27° (1976)
Thu, 2954° / 40°0.15
54 °
Stow, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high54°
Average low40°
Average precipitation0.15 in
Chance of precipitation28%
Record high71° (1989)
Record low29° (1965)
Fri, 3054° / 39°0.16
54 °
Stow, Friday, 30 October
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.16 in
Chance of precipitation28%
Record high71° (1989)
Record low24° (2020)
Sat, 3155° / 39°0.09
55 °
Stow, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high55°
Average low39°
Average precipitation0.09 in
Chance of precipitation22%
Record high77° (2024)
Record low23° (2020)
Sun, 0156° / 40°0.12
56 °
Stow, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high56°
Average low40°
Average precipitation0.12 in
Chance of precipitation30%
Record high75° (2024)
Record low29° (2011)
Mon, 0255° / 40°0.09
55 °
Stow, Monday, 2 November
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.09 in
Chance of precipitation28%
Record high74° (1982)
Record low26° (2011)
Tue, 0355° / 40°0.17
55 °
Stow, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high55°
Average low40°
Average precipitation0.17 in
Chance of precipitation37%
Record high72° (2017)
Record low25° (2002)
Wed, 0454° / 39°0.04
54 °
Stow, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.04 in
Chance of precipitation22%
Record high73° (1987)
Record low27° (2002)
Thu, 0554° / 39°0.15
54 °
Stow, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high54°
Average low39°
Average precipitation0.15 in
Chance of precipitation32%
Record high75° (2022)
Record low28° (1965)
Fri, 0652° / 40°0.13
52 °
Stow, Friday, 6 November
Climate normal for this date — 60-year average.
Average high52°
Average low40°
Average precipitation0.13 in
Chance of precipitation35%
Record high76° (2024)
Record low27° (2012)
Sat, 0752° / 38°0.05
52 °
Stow, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high52°
Average low38°
Average precipitation0.05 in
Chance of precipitation23%
Record high73° (2020)
Record low26° (1962)
Sun, 0851° / 37°0.09
51 °
Stow, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.09 in
Chance of precipitation23%
Record high71° (2020)
Record low25° (1960)
Mon, 0951° / 37°0.1
51 °
Stow, Monday, 9 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.1 in
Chance of precipitation30%
Record high72° (2020)
Record low23° (1971)
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 Stow, MA 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 Stow, MA 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.