Monthly outlook for Wellesley, MA: average high 63.6°, average low 47.7°. That is 1.3° above the climate normal for October. Precipitation is expected on 5 days (about 1.4 inches), against a normal of 4 days and 2.0 inches. The warmest day looks like 17 October (74.6°), the coolest 19 October (38.5°).
63.6°/47.7°
Average high / low
+1.3°
Above normal
5 / 4
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
65.5°
62.1°
+1.9°
18 October – 27 October
60.5°
58.9°
+0.9°
28 October – 6 November
at normal
55.7°
—
October records over 66 years
86.2°5 October 2007All-time high
19.9°31 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Watertown Town (7 mi).
Fri, 0968° / 50°0
68 °
Wellesley, Friday, 9 October
Mostly clear. High 68°, low 50°.
Pressure30.06 inHg
Wind13.2 mph W
Humidity49%
Visibility6.2 mi
Dew point44°
Sat, 1064° / 47°0
64 °
Wellesley, Saturday, 10 October
Overcast. High 64°, low 47°.
Pressure30.47 inHg
Wind5 mph NW
Humidity44%
Visibility6.2 mi
Dew point37°
Sun, 1163° / 45°0.02
63 °
Wellesley, Sunday, 11 October
Light rain. High 63°, low 45°.
Pressure30.39 inHg
Wind6.4 mph S
Humidity67%
Visibility6.2 mi
Dew point50°
Mon, 1265° / 56°0.19
65 °
Wellesley, Monday, 12 October
Light rain. High 65°, low 56°.
Pressure29.74 inHg
Wind7.5 mph N
Humidity91%
Visibility6.2 mi
Dew point56°
Tue, 1366° / 54°0.54
66 °
Wellesley, Tuesday, 13 October
Rain. High 66°, low 54°.
Pressure29.71 inHg
Wind7 mph NE
Humidity76%
Visibility—
Dew point55°
Wed, 1461° / 50°0.49
61 °
Wellesley, Wednesday, 14 October
Rain. High 61°, low 50°.
Pressure29.83 inHg
Wind11.7 mph N
Humidity76%
Visibility—
Dew point48°
Thu, 1558° / 47°0
58 °
Wellesley, Thursday, 15 October
Partly cloudy. High 58°, low 47°.
Pressure30.24 inHg
Wind6.5 mph E
Humidity62%
Visibility—
Dew point43°
Fri, 1665° / 51°0.05
65 °
Wellesley, Friday, 16 October
Light rain. High 65°, low 51°.
Pressure30.18 inHg
Wind11.9 mph SW
Humidity93%
Visibility—
Dew point51°
Sat, 1775° / 52°0.03
75 °
Wellesley, Saturday, 17 October
Light rain. High 75°, low 52°.
Pressure29.94 inHg
Wind13.3 mph N
Humidity69%
Visibility—
Dew point62°
Sun, 1854° / 39°0
54 °
Wellesley, Sunday, 18 October
Clear. High 54°, low 39°.
Pressure30.42 inHg
Wind11.4 mph NW
Humidity42%
Visibility—
Dew point26°
Mon, 1959° / 39°0
59 °
Wellesley, Monday, 19 October
Overcast. High 59°, low 39°.
Pressure30.39 inHg
Wind9.3 mph W
Humidity42%
Visibility—
Dew point29°
Tue, 2057° / 40°0
57 °
Wellesley, Tuesday, 20 October
Clear. High 57°, low 40°.
Pressure30.59 inHg
Wind6 mph E
Humidity55%
Visibility—
Dew point36°
Wed, 2161° / 42°0.01
61 °
Wellesley, Wednesday, 21 October
Light rain. High 61°, low 42°.
Pressure30.36 inHg
Wind9.6 mph S
Humidity64%
Visibility—
Dew point44°
Thu, 2266° / 50°0
66 °
Wellesley, Thursday, 22 October
Clear. High 66°, low 50°.
Pressure30.12 inHg
Wind9.5 mph NW
Humidity55%
Visibility—
Dew point44°
Fri, 2365° / 50°0
65 °
Wellesley, Friday, 23 October
Light rain. High 65°, low 50°.
Pressure30.09 inHg
Wind7.7 mph E
Humidity50%
Visibility—
Dew point41°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2459° / 44°0.11
59 °
Wellesley, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high59°
Average low44°
Average precipitation0.11 in
Chance of precipitation30%
Record high75° (1963)
Record low28° (1969)
Sun, 2558° / 45°0.13
58 °
Wellesley, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high58°
Average low45°
Average precipitation0.13 in
Chance of precipitation28%
Record high79° (1963)
Record low33° (2002)
Mon, 2657° / 44°0.15
57 °
Wellesley, Monday, 26 October
Climate normal for this date — 60-year average.
Average high57°
Average low44°
Average precipitation0.15 in
Chance of precipitation27%
Record high80° (1963)
Record low29° (2018)
Tue, 2757° / 44°0.13
57 °
Wellesley, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high57°
Average low44°
Average precipitation0.13 in
Chance of precipitation20%
Record high80° (1963)
Record low30° (1976)
Wed, 2857° / 42°0.11
57 °
Wellesley, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high57°
Average low42°
Average precipitation0.11 in
Chance of precipitation33%
Record high78° (2023)
Record low29° (1976)
Thu, 2955° / 42°0.14
55 °
Wellesley, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.14 in
Chance of precipitation25%
Record high71° (2015)
Record low30° (1965)
Fri, 3055° / 41°0.15
55 °
Wellesley, Friday, 30 October
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.15 in
Chance of precipitation30%
Record high71° (1989)
Record low22° (2020)
Sat, 3156° / 41°0.08
56 °
Wellesley, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high56°
Average low41°
Average precipitation0.08 in
Chance of precipitation22%
Record high77° (2024)
Record low20° (2020)
Sun, 0157° / 43°0.11
57 °
Wellesley, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high57°
Average low43°
Average precipitation0.11 in
Chance of precipitation32%
Record high77° (2024)
Record low33° (1964)
Mon, 0257° / 43°0.09
57 °
Wellesley, Monday, 2 November
Climate normal for this date — 60-year average.
Average high57°
Average low43°
Average precipitation0.09 in
Chance of precipitation27%
Record high74° (1982)
Record low28° (1965)
Tue, 0356° / 42°0.19
56 °
Wellesley, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high56°
Average low42°
Average precipitation0.19 in
Chance of precipitation33%
Record high74° (2017)
Record low27° (2002)
Wed, 0455° / 41°0.04
55 °
Wellesley, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.04 in
Chance of precipitation22%
Record high74° (1987)
Record low29° (2020)
Thu, 0555° / 41°0.15
55 °
Wellesley, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high55°
Average low41°
Average precipitation0.15 in
Chance of precipitation37%
Record high75° (2022)
Record low29° (1965)
Fri, 0654° / 42°0.12
54 °
Wellesley, Friday, 6 November
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.12 in
Chance of precipitation35%
Record high76° (2022)
Record low29° (2012)
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 Wellesley, 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 Wellesley, 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.