Monthly outlook for Johns Island, SC: average high 75.6°, average low 58.1°. That is 3.6° above the climate normal for October. Precipitation is expected on 2 days (about 0.8 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 13 November (83°), the coolest 8 November (50.9°).
75.6°/58.1°
Average high / low
+3.6°
Above normal
2 / 4
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
30 October – 8 November
74.5°
70.3°
+2.3°
9 November – 18 November
77.6°
66.7°
+6.1°
19 November – 28 November
at normal
65.5°
—
October records over 66 years
94.1°4 October 2019All-time high
36.5°29 October 1976All-time low
Climate normals and records are computed from the nearest reference point — North Charleston (8 mi).
Sat, 3172° / 59°0
72 °
Johns Island, Saturday, 31 October
Overcast. High 72°, low 59°.
Pressure30.33 inHg
Wind10.1 mph NE
Humidity62%
Visibility6.2 mi
Dew point58°
Sun, 0171° / 57°0
71 °
Johns Island, Sunday, 1 November
Overcast. High 71°, low 57°.
Pressure30.39 inHg
Wind9.7 mph NE
Humidity59%
Visibility6.2 mi
Dew point53°
Mon, 0276° / 59°0.01
76 °
Johns Island, Monday, 2 November
Light rain. High 76°, low 59°.
Pressure30.30 inHg
Wind8.2 mph NE
Humidity64%
Visibility6.2 mi
Dew point59°
Tue, 0376° / 58°0
76 °
Johns Island, Tuesday, 3 November
Clear. High 76°, low 58°.
Pressure30.12 inHg
Wind9.1 mph E
Humidity54%
Visibility—
Dew point56°
Wed, 0478° / 61°0.27
78 °
Johns Island, Wednesday, 4 November
Rain. High 78°, low 61°.
Pressure29.94 inHg
Wind8.3 mph NE
Humidity54%
Visibility—
Dew point58°
Thu, 0577° / 64°0.56
77 °
Johns Island, Thursday, 5 November
Rain. High 77°, low 64°.
Pressure29.68 inHg
Wind11.4 mph SW
Humidity73%
Visibility—
Dew point67°
Fri, 0675° / 58°0
75 °
Johns Island, Friday, 6 November
Clear. High 75°, low 58°.
Pressure29.83 inHg
Wind8.4 mph NW
Humidity43%
Visibility—
Dew point49°
Sat, 0771° / 54°0
71 °
Johns Island, Saturday, 7 November
Clear. High 71°, low 54°.
Pressure30.15 inHg
Wind6.9 mph N
Humidity29%
Visibility—
Dew point35°
Sun, 0871° / 51°0
71 °
Johns Island, Sunday, 8 November
Clear. High 71°, low 51°.
Pressure30.15 inHg
Wind4.4 mph S
Humidity36%
Visibility—
Dew point40°
Mon, 0971° / 54°0
71 °
Johns Island, Monday, 9 November
Clear. High 71°, low 54°.
Pressure30.06 inHg
Wind9.3 mph N
Humidity36%
Visibility—
Dew point40°
Tue, 1075° / 52°0
75 °
Johns Island, Tuesday, 10 November
Clear. High 75°, low 52°.
Pressure30.00 inHg
Wind4.8 mph W
Humidity32%
Visibility—
Dew point41°
Wed, 1176° / 56°0
76 °
Johns Island, Wednesday, 11 November
Mostly clear. High 76°, low 56°.
Pressure29.97 inHg
Wind8.5 mph S
Humidity39%
Visibility—
Dew point47°
Thu, 1278° / 58°0
78 °
Johns Island, Thursday, 12 November
Clear. High 78°, low 58°.
Pressure29.94 inHg
Wind10 mph SW
Humidity47%
Visibility—
Dew point54°
Fri, 1383° / 63°0
83 °
Johns Island, Friday, 13 November
Clear. High 83°, low 63°.
Pressure30.12 inHg
Wind7.2 mph S
Humidity40%
Visibility—
Dew point54°
Sat, 1482° / 66°0
82 °
Johns Island, Saturday, 14 November
Partly cloudy. High 82°, low 66°.
Pressure30.18 inHg
Wind7 mph S
Humidity49%
Visibility—
Dew point59°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 1565° / 49°0.12
65 °
Johns Island, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high65°
Average low49°
Average precipitation0.12 in
Chance of precipitation23%
Record high80° (1993)
Record low31° (1969)
Mon, 1666° / 50°0.07
66 °
Johns Island, Monday, 16 November
Climate normal for this date — 60-year average.
Average high66°
Average low50°
Average precipitation0.07 in
Chance of precipitation18%
Record high80° (1993)
Record low32° (1969)
Tue, 1766° / 49°0.09
66 °
Johns Island, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high66°
Average low49°
Average precipitation0.09 in
Chance of precipitation23%
Record high80° (1964)
Record low36° (1997)
Wed, 1867° / 49°0.05
67 °
Johns Island, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high67°
Average low49°
Average precipitation0.05 in
Chance of precipitation18%
Record high80° (1978)
Record low33° (1997)
Thu, 1967° / 50°0.07
67 °
Johns Island, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high67°
Average low50°
Average precipitation0.07 in
Chance of precipitation17%
Record high80° (2025)
Record low28° (2014)
Fri, 2066° / 51°0.05
66 °
Johns Island, Friday, 20 November
Climate normal for this date — 60-year average.
Average high66°
Average low51°
Average precipitation0.05 in
Chance of precipitation18%
Record high76° (1985)
Record low31° (2014)
Sat, 2165° / 50°0.08
65 °
Johns Island, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high65°
Average low50°
Average precipitation0.08 in
Chance of precipitation22%
Record high79° (2025)
Record low32° (1968)
Sun, 2264° / 49°0.07
64 °
Johns Island, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high64°
Average low49°
Average precipitation0.07 in
Chance of precipitation25%
Record high77° (2011)
Record low29° (2000)
Mon, 2364° / 48°0.1
64 °
Johns Island, Monday, 23 November
Climate normal for this date — 60-year average.
Average high64°
Average low48°
Average precipitation0.1 in
Chance of precipitation23%
Record high76° (1992)
Record low30° (2008)
Tue, 2465° / 49°0.07
65 °
Johns Island, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high65°
Average low49°
Average precipitation0.07 in
Chance of precipitation25%
Record high77° (1986)
Record low28° (1970)
Wed, 2565° / 49°0.13
65 °
Johns Island, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high65°
Average low49°
Average precipitation0.13 in
Chance of precipitation23%
Record high78° (1973)
Record low26° (1970)
Thu, 2666° / 49°0.08
66 °
Johns Island, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high66°
Average low49°
Average precipitation0.08 in
Chance of precipitation25%
Record high79° (1973)
Record low32° (1970)
Fri, 2767° / 51°0.1
67 °
Johns Island, Friday, 27 November
Climate normal for this date — 60-year average.
Average high67°
Average low51°
Average precipitation0.1 in
Chance of precipitation28%
Record high80° (1973)
Record low33° (1977)
Sat, 2865° / 50°0.08
65 °
Johns Island, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high65°
Average low50°
Average precipitation0.08 in
Chance of precipitation35%
Record high76° (1985)
Record low31° (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 Johns Island, SC 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 Johns Island, SC 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.