Monthly outlook for Mount Parnassus, CT: average high 58.3°, average low 42.6°. That is 0.4° above the climate normal for October. Precipitation is expected on 1 day (about 0.8 inches), against a normal of 4 days and 2.0 inches. The warmest day looks like 29 October (66.1°), the coolest 24 October (34.1°).
58.3°/42.6°
Average high / low
+0.4°
Above normal
1 / 4
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
58.8°
58.2°
+0.3°
31 October – 9 November
57.3°
55.5°
+1°
10 November – 19 November
at normal
51.1°
—
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).
Thu, 2264° / 44°0
64 °
Mount Parnassus, Thursday, 22 October
Overcast. High 64°, low 44°.
Pressure29.94 inHg
Wind11.2 mph N
Humidity46%
Visibility6.2 mi
Dew point36°
Fri, 2354° / 38°0
54 °
Mount Parnassus, Friday, 23 October
Clear. High 54°, low 38°.
Pressure30.39 inHg
Wind8 mph N
Humidity50%
Visibility6.2 mi
Dew point32°
Sat, 2455° / 34°0
55 °
Mount Parnassus, Saturday, 24 October
Mostly clear. High 55°, low 34°.
Pressure30.56 inHg
Wind3.7 mph NW
Humidity44%
Visibility6.2 mi
Dew point32°
Sun, 2561° / 35°0
61 °
Mount Parnassus, Sunday, 25 October
Clear. High 61°, low 35°.
Pressure30.53 inHg
Wind2.5 mph NW
Humidity51%
Visibility6.2 mi
Dew point38°
Mon, 2661° / 40°0
61 °
Mount Parnassus, Monday, 26 October
Clear. High 61°, low 40°.
Pressure30.36 inHg
Wind5.9 mph NW
Humidity55%
Visibility—
Dew point38°
Tue, 2755° / 41°0
55 °
Mount Parnassus, Tuesday, 27 October
Clear. High 55°, low 41°.
Pressure30.39 inHg
Wind8.5 mph N
Humidity39%
Visibility—
Dew point26°
Wed, 2858° / 40°0
58 °
Mount Parnassus, Wednesday, 28 October
Overcast. High 58°, low 40°.
Pressure30.47 inHg
Wind8.9 mph S
Humidity60%
Visibility—
Dew point40°
Thu, 2966° / 51°0
66 °
Mount Parnassus, Thursday, 29 October
Partly cloudy. High 66°, low 51°.
Pressure30.24 inHg
Wind13.2 mph SW
Humidity70%
Visibility—
Dew point52°
Fri, 3057° / 41°0
57 °
Mount Parnassus, Friday, 30 October
Light rain. High 57°, low 41°.
Pressure30.21 inHg
Wind10 mph N
Humidity65%
Visibility—
Dew point45°
Sat, 3153° / 37°0
53 °
Mount Parnassus, Saturday, 31 October
Clear. High 53°, low 37°.
Pressure30.56 inHg
Wind9.6 mph NE
Humidity42%
Visibility—
Dew point25°
Sun, 0153° / 37°0
53 °
Mount Parnassus, Sunday, 1 November
Overcast. High 53°, low 37°.
Pressure30.68 inHg
Wind9.2 mph SE
Humidity62%
Visibility—
Dew point36°
Mon, 0261° / 52°0
61 °
Mount Parnassus, Monday, 2 November
Overcast. High 61°, low 52°.
Pressure30.45 inHg
Wind7.4 mph SE
Humidity78%
Visibility—
Dew point52°
Tue, 0365° / 50°0
65 °
Mount Parnassus, Tuesday, 3 November
Overcast. High 65°, low 50°.
Pressure30.33 inHg
Wind8.6 mph SE
Humidity66%
Visibility—
Dew point50°
Wed, 0456° / 50°0
56 °
Mount Parnassus, Wednesday, 4 November
Overcast. High 56°, low 50°.
Pressure30.24 inHg
Wind12.7 mph E
Humidity82%
Visibility—
Dew point49°
Thu, 0556° / 49°0.84
56 °
Mount Parnassus, Thursday, 5 November
Rain. High 56°, low 49°.
Pressure30.09 inHg
Wind16.9 mph E
Humidity96%
Visibility—
Dew point48°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0655° / 45°0.11
55 °
Mount Parnassus, Friday, 6 November
Climate normal for this date — 60-year average.
Average high55°
Average low45°
Average precipitation0.11 in
Chance of precipitation35%
Record high71° (2024)
Record low33° (2012)
Sat, 0755° / 44°0.07
55 °
Mount Parnassus, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.07 in
Chance of precipitation25%
Record high72° (2022)
Record low32° (1962)
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)
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.