Monthly outlook for Mount Parnassus, CT: average high 58°, average low 43.5°. That is 0.6° above the climate normal for October. Precipitation is expected on 4 days (about 2.2 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 31 October (64.5°), the coolest 7 November (29.8°).
58°/43.5°
Average high / low
+0.6°
Above normal
4 / 5
Wet days / normal
2.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
23 October – 1 November
59.6°
57.6°
+1.1°
2 November – 11 November
55.3°
54.8°
+0.3°
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, 2460° / 33°0
60 °
Mount Parnassus, Saturday, 24 October
Mostly clear. High 60°, low 33°.
Pressure30.50 inHg
Wind4.7 mph NW
Humidity44%
Visibility6.2 mi
Dew point30°
Sun, 2562° / 36°0
62 °
Mount Parnassus, Sunday, 25 October
Clear. High 62°, low 36°.
Pressure30.53 inHg
Wind1.4 mph SW
Humidity44%
Visibility6.2 mi
Dew point37°
Mon, 2664° / 40°0
64 °
Mount Parnassus, Monday, 26 October
Clear. High 64°, low 40°.
Pressure30.24 inHg
Wind4 mph W
Humidity43%
Visibility6.2 mi
Dew point38°
Tue, 2752° / 38°0
52 °
Mount Parnassus, Tuesday, 27 October
Mostly clear. High 52°, low 38°.
Pressure30.36 inHg
Wind10.1 mph N
Humidity51%
Visibility—
Dew point31°
Wed, 2853° / 33°0
53 °
Mount Parnassus, Wednesday, 28 October
Mostly clear. High 53°, low 33°.
Pressure30.50 inHg
Wind5.5 mph NE
Humidity54%
Visibility—
Dew point30°
Thu, 2959° / 48°0
59 °
Mount Parnassus, Thursday, 29 October
Mostly clear. High 59°, low 48°.
Pressure30.45 inHg
Wind8.2 mph SW
Humidity59%
Visibility—
Dew point42°
Fri, 3063° / 50°0
63 °
Mount Parnassus, Friday, 30 October
Overcast. High 63°, low 50°.
Pressure30.21 inHg
Wind10.8 mph SW
Humidity70%
Visibility—
Dew point48°
Sat, 3164° / 51°0
64 °
Mount Parnassus, Saturday, 31 October
Overcast. High 64°, low 51°.
Pressure30.27 inHg
Wind9.1 mph E
Humidity63%
Visibility—
Dew point48°
Sun, 0163° / 50°0.03
63 °
Mount Parnassus, Sunday, 1 November
Light rain. High 63°, low 50°.
Pressure30.33 inHg
Wind10.6 mph S
Humidity93%
Visibility—
Dew point54°
Mon, 0261° / 58°0.85
61 °
Mount Parnassus, Monday, 2 November
Rain. High 61°, low 58°.
Pressure30.09 inHg
Wind6.7 mph SW
Humidity99%
Visibility—
Dew point60°
Tue, 0361° / 57°0.28
61 °
Mount Parnassus, Tuesday, 3 November
Light rain. High 61°, low 57°.
Pressure30.09 inHg
Wind4 mph NE
Humidity92%
Visibility—
Dew point58°
Wed, 0455° / 48°0.17
55 °
Mount Parnassus, Wednesday, 4 November
Rain. High 55°, low 48°.
Pressure30.21 inHg
Wind11.1 mph E
Humidity82%
Visibility—
Dew point47°
Thu, 0557° / 41°0.86
57 °
Mount Parnassus, Thursday, 5 November
Rain. High 57°, low 41°.
Pressure29.59 inHg
Wind15.5 mph W
Humidity88%
Visibility—
Dew point49°
Fri, 0652° / 41°0
52 °
Mount Parnassus, Friday, 6 November
Overcast. High 52°, low 41°.
Pressure29.68 inHg
Wind14.3 mph W
Humidity61%
Visibility—
Dew point36°
Sat, 0746° / 30°0.03
46 °
Mount Parnassus, Saturday, 7 November
Light rain. High 46°, low 30°.
Pressure30.00 inHg
Wind17.3 mph NW
Humidity36%
Visibility—
Dew point12°
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.