Monthly outlook for Mount Parnassus, CT: average high 56.3°, average low 38.4°. That is 0.1° below the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 30 October (67.4°), the coolest 6 November (31.1°).
56.3°/38.4°
Average high / low
−0.1°
Below normal
0 / 5
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
24 October – 2 November
58.2°
57.5°
+0.4°
3 November – 12 November
53.2°
54.2°
-0.5°
13 November – 22 November
at normal
49.9°
—
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).
Sun, 2565° / 35°0
65 °
Mount Parnassus, Sunday, 25 October
Clear. High 65°, low 35°.
Pressure30.56 inHg
Wind3 mph NW
Humidity41%
Visibility6.2 mi
Dew point35°
Mon, 2664° / 38°0
64 °
Mount Parnassus, Monday, 26 October
Mostly clear. High 64°, low 38°.
Pressure30.21 inHg
Wind6.4 mph W
Humidity46%
Visibility6.2 mi
Dew point39°
Tue, 2754° / 39°0
54 °
Mount Parnassus, Tuesday, 27 October
Clear. High 54°, low 39°.
Pressure30.36 inHg
Wind7.6 mph N
Humidity49%
Visibility6.2 mi
Dew point32°
Wed, 2853° / 34°0
53 °
Mount Parnassus, Wednesday, 28 October
Clear. High 53°, low 34°.
Pressure30.53 inHg
Wind1.8 mph E
Humidity52%
Visibility6.2 mi
Dew point32°
Thu, 2961° / 41°0
61 °
Mount Parnassus, Thursday, 29 October
Partly cloudy. High 61°, low 41°.
Pressure30.36 inHg
Wind10.8 mph SW
Humidity64%
Visibility—
Dew point43°
Fri, 3067° / 49°0
67 °
Mount Parnassus, Friday, 30 October
Clear. High 67°, low 49°.
Pressure30.06 inHg
Wind9.7 mph N
Humidity59%
Visibility—
Dew point47°
Sat, 3154° / 40°0
54 °
Mount Parnassus, Saturday, 31 October
Overcast. High 54°, low 40°.
Pressure30.42 inHg
Wind12.8 mph NE
Humidity50%
Visibility—
Dew point33°
Sun, 0155° / 36°0
55 °
Mount Parnassus, Sunday, 1 November
Overcast. High 55°, low 36°.
Pressure30.50 inHg
Wind9.4 mph NE
Humidity58%
Visibility—
Dew point34°
Mon, 0253° / 37°0
53 °
Mount Parnassus, Monday, 2 November
Overcast. High 53°, low 37°.
Pressure30.24 inHg
Wind9.6 mph E
Humidity65%
Visibility—
Dew point36°
Tue, 0358° / 46°0
58 °
Mount Parnassus, Tuesday, 3 November
Overcast. High 58°, low 46°.
Pressure29.77 inHg
Wind8.4 mph SW
Humidity72%
Visibility—
Dew point43°
Wed, 0450° / 37°0
50 °
Mount Parnassus, Wednesday, 4 November
Mostly clear. High 50°, low 37°.
Pressure29.85 inHg
Wind11.1 mph NW
Humidity51%
Visibility—
Dew point30°
Thu, 0547° / 32°0
47 °
Mount Parnassus, Thursday, 5 November
Clear. High 47°, low 32°.
Pressure30.33 inHg
Wind12.1 mph NW
Humidity47%
Visibility—
Dew point22°
Fri, 0649° / 31°0
49 °
Mount Parnassus, Friday, 6 November
Overcast. High 49°, low 31°.
Pressure30.50 inHg
Wind7.1 mph SW
Humidity43%
Visibility—
Dew point22°
Sat, 0757° / 40°0
57 °
Mount Parnassus, Saturday, 7 November
Overcast. High 57°, low 40°.
Pressure30.30 inHg
Wind9.9 mph W
Humidity49%
Visibility—
Dew point32°
Sun, 0858° / 47°0.01
58 °
Mount Parnassus, Sunday, 8 November
Light rain. High 58°, low 47°.
Pressure30.03 inHg
Wind10.8 mph S
Humidity50%
Visibility—
Dew point36°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Sun, 2248° / 38°0.15
48 °
Mount Parnassus, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high48°
Average low38°
Average precipitation0.15 in
Chance of precipitation37%
Record high60° (1994)
Record low15° (2018)
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.