Monthly outlook for Mount Parnassus, CT: average high 59°, average low 41.5°. That is 1.2° above the climate normal for October. Precipitation is expected on 1 day (about 0.3 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 30 October (66.3°), the coolest 28 October (33.2°).
59°/41.5°
Average high / low
+1.2°
Above normal
1 / 5
Wet days / normal
0.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
23 October – 1 November
58.9°
57.6°
+0.7°
2 November – 11 November
59.3°
54.8°
+2.5°
12 November – 21 November
at normal
50.2°
—
October records over 66 years
80.6°2 October 2019All-time high
29.1°31 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Old Lyme (12 mi).
Sat, 2461° / 35°0
61 °
Mount Parnassus, Saturday, 24 October
Overcast. High 61°, low 35°.
Pressure30.53 inHg
Wind4.2 mph NW
Humidity44%
Visibility6.2 mi
Dew point32°
Sun, 2563° / 38°0
63 °
Mount Parnassus, Sunday, 25 October
Clear. High 63°, low 38°.
Pressure30.53 inHg
Wind1.6 mph W
Humidity42%
Visibility6.2 mi
Dew point36°
Mon, 2664° / 39°0
64 °
Mount Parnassus, Monday, 26 October
Clear. High 64°, low 39°.
Pressure30.21 inHg
Wind4.6 mph W
Humidity42%
Visibility6.2 mi
Dew point37°
Tue, 2751° / 38°0
51 °
Mount Parnassus, Tuesday, 27 October
Clear. High 51°, low 38°.
Pressure30.36 inHg
Wind8.2 mph N
Humidity51%
Visibility6.2 mi
Dew point30°
Wed, 2852° / 33°0
52 °
Mount Parnassus, Wednesday, 28 October
Clear. High 52°, low 33°.
Pressure30.50 inHg
Wind5.8 mph N
Humidity55%
Visibility—
Dew point30°
Thu, 2958° / 41°0
58 °
Mount Parnassus, Thursday, 29 October
Clear. High 58°, low 41°.
Pressure30.39 inHg
Wind8 mph S
Humidity60%
Visibility—
Dew point39°
Fri, 3066° / 46°0
66 °
Mount Parnassus, Friday, 30 October
Partly cloudy. High 66°, low 46°.
Pressure30.15 inHg
Wind7.2 mph SW
Humidity60%
Visibility—
Dew point44°
Sat, 3162° / 47°0
62 °
Mount Parnassus, Saturday, 31 October
Partly cloudy. High 62°, low 47°.
Pressure30.30 inHg
Wind8.5 mph E
Humidity71%
Visibility—
Dew point46°
Sun, 0154° / 45°0
54 °
Mount Parnassus, Sunday, 1 November
Overcast. High 54°, low 45°.
Pressure30.50 inHg
Wind5.8 mph SE
Humidity72%
Visibility—
Dew point43°
Mon, 0263° / 51°0.01
63 °
Mount Parnassus, Monday, 2 November
Light rain. High 63°, low 51°.
Pressure30.36 inHg
Wind6 mph SW
Humidity94%
Visibility—
Dew point54°
Tue, 0361° / 50°0
61 °
Mount Parnassus, Tuesday, 3 November
Overcast. High 61°, low 50°.
Pressure30.36 inHg
Wind8 mph SE
Humidity70%
Visibility—
Dew point48°
Wed, 0464° / 42°0.3
64 °
Mount Parnassus, Wednesday, 4 November
Rain. High 64°, low 42°.
Pressure29.83 inHg
Wind17.5 mph NW
Humidity77%
Visibility—
Dew point56°
Thu, 0554° / 37°0
54 °
Mount Parnassus, Thursday, 5 November
Mostly clear. High 54°, low 37°.
Pressure29.97 inHg
Wind15.3 mph NW
Humidity55%
Visibility—
Dew point30°
Fri, 0659° / 42°0
59 °
Mount Parnassus, Friday, 6 November
Clear. High 59°, low 42°.
Pressure29.83 inHg
Wind9.3 mph NW
Humidity58%
Visibility—
Dew point39°
Sat, 0755° / 38°0
55 °
Mount Parnassus, Saturday, 7 November
Overcast. High 55°, low 38°.
Pressure30.00 inHg
Wind12.1 mph NW
Humidity53%
Visibility—
Dew point36°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0853° / 43°0.13
53 °
Mount Parnassus, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high53°
Average low43°
Average precipitation0.13 in
Chance of precipitation32%
Record high71° (2020)
Record low30° (2019)
Mon, 0953° / 43°0.09
53 °
Mount Parnassus, Monday, 9 November
Climate normal for this date — 60-year average.
Average high53°
Average low43°
Average precipitation0.09 in
Chance of precipitation22%
Record high67° (1975)
Record low26° (2019)
Tue, 1054° / 43°0.18
54 °
Mount Parnassus, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high54°
Average low43°
Average precipitation0.18 in
Chance of precipitation40%
Record high65° (1999)
Record low27° (2017)
Wed, 1153° / 43°0.16
53 °
Mount Parnassus, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high53°
Average low43°
Average precipitation0.16 in
Chance of precipitation35%
Record high67° (2022)
Record low23° (2017)
Thu, 1252° / 41°0.16
52 °
Mount Parnassus, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.16 in
Chance of precipitation38%
Record high71° (2022)
Record low28° (2019)
Fri, 1351° / 40°0.21
51 °
Mount Parnassus, Friday, 13 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.21 in
Chance of precipitation40%
Record high65° (1964)
Record low22° (2019)
Sat, 1450° / 40°0.09
50 °
Mount Parnassus, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.09 in
Chance of precipitation22%
Record high62° (1989)
Record low25° (1986)
Sun, 1551° / 40°0.13
51 °
Mount Parnassus, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.13 in
Chance of precipitation42%
Record high67° (1993)
Record low24° (1967)
Mon, 1651° / 40°0.15
51 °
Mount Parnassus, Monday, 16 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.15 in
Chance of precipitation35%
Record high64° (2001)
Record low23° (1967)
Tue, 1750° / 40°0.15
50 °
Mount Parnassus, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.15 in
Chance of precipitation28%
Record high65° (2024)
Record low26° (2019)
Wed, 1850° / 40°0.08
50 °
Mount Parnassus, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.08 in
Chance of precipitation23%
Record high63° (2024)
Record low27° (2020)
Thu, 1950° / 39°0.06
50 °
Mount Parnassus, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high50°
Average low39°
Average precipitation0.06 in
Chance of precipitation23%
Record high62° (2021)
Record low24° (1986)
Fri, 2049° / 39°0.13
49 °
Mount Parnassus, Friday, 20 November
Climate normal for this date — 60-year average.
Average high49°
Average low39°
Average precipitation0.13 in
Chance of precipitation32%
Record high64° (1985)
Record low20° (1986)
Sat, 2149° / 38°0.11
49 °
Mount Parnassus, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high49°
Average low38°
Average precipitation0.11 in
Chance of precipitation30%
Record high60° (2020)
Record low20° (1987)
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 Mount Parnassus, 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 Mount Parnassus, 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.