Monthly outlook for Mystic, CT: average high 61.4°, average low 48.4°. That is 0.5° above the climate normal for October. Precipitation is expected on 2 days (about 1.6 inches), against a normal of 4 days and 2.2 inches. The warmest day looks like 14 October (74.4°), the coolest 18 October (35°).
61.4°/48.4°
Average high / low
+0.5°
Above normal
2 / 4
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 October – 22 October
63.1°
61.5°
+0.9°
23 October – 1 November
58.6°
58.2°
+0.2°
2 November – 11 November
at normal
55.3°
—
October records over 66 years
82°8 October 2007All-time high
28.9°31 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Fishers Island (6 mi).
Wed, 1474° / 60°0.3
74 °
Mystic, Wednesday, 14 October
Rain. High 74°, low 60°.
Pressure29.83 inHg
Wind8.2 mph W
Humidity63%
Visibility6.2 mi
Dew point63°
Thu, 1563° / 52°0
63 °
Mystic, Thursday, 15 October
Clear. High 63°, low 52°.
Pressure30.21 inHg
Wind6.4 mph N
Humidity52%
Visibility6.2 mi
Dew point43°
Fri, 1670° / 52°1.24
70 °
Mystic, Friday, 16 October
Heavy rain. High 70°, low 52°.
Pressure29.65 inHg
Wind14.4 mph SW
Humidity99%
Visibility1.9 mi
Dew point66°
Sat, 1754° / 40°0.02
54 °
Mystic, Saturday, 17 October
Light rain. High 54°, low 40°.
Pressure29.91 inHg
Wind17.1 mph NW
Humidity49%
Visibility6.2 mi
Dew point27°
Sun, 1855° / 35°0
55 °
Mystic, Sunday, 18 October
Clear. High 55°, low 35°.
Pressure30.47 inHg
Wind9.4 mph SW
Humidity51%
Visibility—
Dew point30°
Mon, 1963° / 50°0
63 °
Mystic, Monday, 19 October
Overcast. High 63°, low 50°.
Pressure30.42 inHg
Wind17.3 mph SW
Humidity63%
Visibility—
Dew point46°
Tue, 2066° / 55°0
66 °
Mystic, Tuesday, 20 October
Overcast. High 66°, low 55°.
Pressure30.36 inHg
Wind13.2 mph SW
Humidity61%
Visibility—
Dew point49°
Wed, 2163° / 48°0
63 °
Mystic, Wednesday, 21 October
Clear. High 63°, low 48°.
Pressure30.42 inHg
Wind8.8 mph NE
Humidity38%
Visibility—
Dew point32°
Thu, 2259° / 47°0
59 °
Mystic, Thursday, 22 October
Partly cloudy. High 59°, low 47°.
Pressure30.50 inHg
Wind6.6 mph S
Humidity61%
Visibility—
Dew point42°
Fri, 2364° / 53°0
64 °
Mystic, Friday, 23 October
Overcast. High 64°, low 53°.
Pressure30.36 inHg
Wind14 mph SW
Humidity67%
Visibility—
Dew point49°
Sat, 2469° / 58°0
69 °
Mystic, Saturday, 24 October
Mostly clear. High 69°, low 58°.
Pressure30.09 inHg
Wind13.4 mph W
Humidity69%
Visibility—
Dew point55°
Sun, 2561° / 50°0
61 °
Mystic, Sunday, 25 October
Mostly clear. High 61°, low 50°.
Pressure30.00 inHg
Wind12.7 mph NW
Humidity47%
Visibility—
Dew point40°
Mon, 2656° / 44°0
56 °
Mystic, Monday, 26 October
Clear. High 56°, low 44°.
Pressure29.91 inHg
Wind11.1 mph W
Humidity50%
Visibility—
Dew point34°
Tue, 2752° / 41°0
52 °
Mystic, Tuesday, 27 October
Clear. High 52°, low 41°.
Pressure30.09 inHg
Wind16 mph NW
Humidity46%
Visibility—
Dew point28°
Wed, 2850° / 35°0
50 °
Mystic, Wednesday, 28 October
Overcast. High 50°, low 35°.
Pressure30.42 inHg
Wind7 mph NW
Humidity41%
Visibility—
Dew point22°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 2957° / 45°0.17
57 °
Mystic, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high57°
Average low45°
Average precipitation0.17 in
Chance of precipitation23%
Record high73° (1971)
Record low32° (1965)
Fri, 3056° / 44°0.17
56 °
Mystic, Friday, 30 October
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.17 in
Chance of precipitation25%
Record high69° (1971)
Record low33° (2020)
Sat, 3157° / 45°0.08
57 °
Mystic, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high57°
Average low45°
Average precipitation0.08 in
Chance of precipitation23%
Record high72° (2024)
Record low29° (2020)
Sun, 0158° / 46°0.11
58 °
Mystic, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high58°
Average low46°
Average precipitation0.11 in
Chance of precipitation32%
Record high74° (2024)
Record low36° (1968)
Mon, 0258° / 46°0.09
58 °
Mystic, Monday, 2 November
Climate normal for this date — 60-year average.
Average high58°
Average low46°
Average precipitation0.09 in
Chance of precipitation30%
Record high68° (2022)
Record low30° (1965)
Tue, 0358° / 45°0.17
58 °
Mystic, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high58°
Average low45°
Average precipitation0.17 in
Chance of precipitation30%
Record high70° (1990)
Record low32° (2002)
Wed, 0456° / 45°0.04
56 °
Mystic, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high56°
Average low45°
Average precipitation0.04 in
Chance of precipitation23%
Record high70° (1975)
Record low33° (2013)
Thu, 0556° / 45°0.15
56 °
Mystic, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high56°
Average low45°
Average precipitation0.15 in
Chance of precipitation38%
Record high69° (2022)
Record low33° (1965)
Fri, 0655° / 44°0.13
55 °
Mystic, Friday, 6 November
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.13 in
Chance of precipitation35%
Record high71° (2024)
Record low32° (2012)
Sat, 0755° / 43°0.08
55 °
Mystic, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.08 in
Chance of precipitation25%
Record high73° (2022)
Record low30° (1962)
Sun, 0854° / 42°0.12
54 °
Mystic, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.12 in
Chance of precipitation30%
Record high71° (2020)
Record low30° (2019)
Mon, 0954° / 42°0.09
54 °
Mystic, Monday, 9 November
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.09 in
Chance of precipitation20%
Record high71° (1975)
Record low26° (2019)
Tue, 1055° / 42°0.18
55 °
Mystic, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.18 in
Chance of precipitation38%
Record high67° (1999)
Record low27° (2017)
Wed, 1153° / 42°0.15
53 °
Mystic, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.15 in
Chance of precipitation35%
Record high67° (2022)
Record low24° (2017)
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 Mystic, 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 Mystic, 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.