Monthly outlook for Mount Parnassus, CT: average high 57.8°, average low 41°. That is 0.9° above the climate normal for October. Precipitation is expected on 2 days (about 2.1 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 26 October (68.5°), the coolest 25 October (31.8°).
57.8°/41°
Average high / low
+0.9°
Above normal
2 / 5
Wet days / normal
2.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
25 October – 3 November
60.2°
57.3°
+1.6°
4 November – 13 November
53.9°
53.6°
+0.1°
14 November – 23 November
at normal
49.5°
—
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).
Mon, 2669° / 35°0
69 °
Mount Parnassus, Monday, 26 October
Mostly clear. High 69°, low 35°.
Pressure30.21 inHg
Wind5.3 mph W
Humidity45%
Visibility6.2 mi
Dew point40°
Tue, 2756° / 38°0
56 °
Mount Parnassus, Tuesday, 27 October
Mostly clear. High 56°, low 38°.
Pressure30.36 inHg
Wind6.4 mph N
Humidity50%
Visibility6.2 mi
Dew point33°
Wed, 2856° / 34°0
56 °
Mount Parnassus, Wednesday, 28 October
Clear. High 56°, low 34°.
Pressure30.47 inHg
Wind2.8 mph SW
Humidity52%
Visibility6.2 mi
Dew point36°
Thu, 2960° / 44°0
60 °
Mount Parnassus, Thursday, 29 October
Overcast. High 60°, low 44°.
Pressure30.27 inHg
Wind9.3 mph SW
Humidity67%
Visibility6.2 mi
Dew point48°
Fri, 3068° / 49°0
68 °
Mount Parnassus, Friday, 30 October
Mostly clear. High 68°, low 49°.
Pressure30.06 inHg
Wind7.5 mph SW
Humidity70%
Visibility—
Dew point50°
Sat, 3157° / 42°0
57 °
Mount Parnassus, Saturday, 31 October
Clear. High 57°, low 42°.
Pressure30.33 inHg
Wind7.4 mph N
Humidity42%
Visibility—
Dew point29°
Sun, 0156° / 41°0
56 °
Mount Parnassus, Sunday, 1 November
Overcast. High 56°, low 41°.
Pressure30.36 inHg
Wind4.7 mph SW
Humidity44%
Visibility—
Dew point30°
Mon, 0264° / 44°0
64 °
Mount Parnassus, Monday, 2 November
Overcast. High 64°, low 44°.
Pressure30.24 inHg
Wind6.2 mph NE
Humidity47%
Visibility—
Dew point36°
Tue, 0351° / 44°0
51 °
Mount Parnassus, Tuesday, 3 November
Overcast. High 51°, low 44°.
Pressure30.33 inHg
Wind19.4 mph NE
Humidity59%
Visibility—
Dew point35°
Wed, 0447° / 44°1.55
47 °
Mount Parnassus, Wednesday, 4 November
Heavy rain. High 47°, low 44°.
Pressure30.12 inHg
Wind22.3 mph NE
Humidity87%
Visibility—
Dew point41°
Thu, 0549° / 43°0
49 °
Mount Parnassus, Thursday, 5 November
Overcast. High 49°, low 43°.
Pressure29.77 inHg
Wind18 mph N
Humidity88%
Visibility—
Dew point40°
Fri, 0657° / 39°0
57 °
Mount Parnassus, Friday, 6 November
Mostly clear. High 57°, low 39°.
Pressure29.91 inHg
Wind5.3 mph NW
Humidity46%
Visibility—
Dew point30°
Sat, 0756° / 40°0
56 °
Mount Parnassus, Saturday, 7 November
Partly cloudy. High 56°, low 40°.
Pressure30.12 inHg
Wind4.5 mph N
Humidity62%
Visibility—
Dew point38°
Sun, 0857° / 43°0
57 °
Mount Parnassus, Sunday, 8 November
Overcast. High 57°, low 43°.
Pressure29.88 inHg
Wind6.2 mph SE
Humidity76%
Visibility—
Dew point43°
Mon, 0957° / 45°0.6
57 °
Mount Parnassus, Monday, 9 November
Rain. High 57°, low 45°.
Pressure29.59 inHg
Wind18.7 mph SE
Humidity83%
Visibility—
Dew point49°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Mon, 2347° / 37°0.13
47 °
Mount Parnassus, Monday, 23 November
Climate normal for this date — 60-year average.
Average high47°
Average low37°
Average precipitation0.13 in
Chance of precipitation25%
Record high60° (1992)
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.