Monthly outlook for Heiskell, TN: average high 75.8°, average low 56.2°. That is 3.5° above the climate normal for October. Precipitation is expected on 3 days (about 1.8 inches), against a normal of 4 days and 1.6 inches. The warmest day looks like 8 October (84.8°), the coolest 21 October (49.9°).
75.8°/56.2°
Average high / low
+3.5°
Above normal
3 / 4
Wet days / normal
1.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
7 October – 16 October
78.7°
70.9°
+4.3°
17 October – 26 October
70.9°
66.9°
+2.2°
27 October – 5 November
at normal
64.3°
—
October records over 66 years
96.8°3 October 2019All-time high
27.9°26 October 1962All-time low
Climate normals and records are computed from the nearest reference point — Knoxville (10 mi).
Thu, 0885° / 55°0
85 °
Heiskell, Thursday, 8 October
Clear. High 85°, low 55°.
Pressure30.06 inHg
Wind3.2 mph NE
Humidity42%
Visibility6.2 mi
Dew point53°
Fri, 0985° / 54°0
85 °
Heiskell, Friday, 9 October
Overcast. High 85°, low 54°.
Pressure30.21 inHg
Wind7.1 mph E
Humidity29%
Visibility6.2 mi
Dew point44°
Sat, 1073° / 59°0.45
73 °
Heiskell, Saturday, 10 October
Rain. High 73°, low 59°.
Pressure30.18 inHg
Wind9.7 mph E
Humidity39%
Visibility6.2 mi
Dew point46°
Sun, 1171° / 61°0.7
71 °
Heiskell, Sunday, 11 October
Rain. High 71°, low 61°.
Pressure29.91 inHg
Wind2.1 mph SW
Humidity94%
Visibility3.3 mi
Dew point66°
Mon, 1275° / 60°0.04
75 °
Heiskell, Monday, 12 October
Light rain. High 75°, low 60°.
Pressure30.00 inHg
Wind7.5 mph NW
Humidity63%
Visibility—
Dew point58°
Tue, 1382° / 57°0
82 °
Heiskell, Tuesday, 13 October
Clear. High 82°, low 57°.
Pressure29.88 inHg
Wind8.4 mph SW
Humidity50%
Visibility—
Dew point58°
Wed, 1476° / 55°0
76 °
Heiskell, Wednesday, 14 October
Clear. High 76°, low 55°.
Pressure30.06 inHg
Wind6.8 mph N
Humidity38%
Visibility—
Dew point45°
Thu, 1581° / 59°0
81 °
Heiskell, Thursday, 15 October
Clear. High 81°, low 59°.
Pressure30.15 inHg
Wind8.2 mph SW
Humidity46%
Visibility—
Dew point54°
Fri, 1681° / 62°0
81 °
Heiskell, Friday, 16 October
Clear. High 81°, low 62°.
Pressure30.18 inHg
Wind6.1 mph SW
Humidity46%
Visibility—
Dew point55°
Sat, 1780° / 58°0
80 °
Heiskell, Saturday, 17 October
Clear. High 80°, low 58°.
Pressure30.15 inHg
Wind3.3 mph SW
Humidity41%
Visibility—
Dew point51°
Sun, 1874° / 58°0
74 °
Heiskell, Sunday, 18 October
Overcast. High 74°, low 58°.
Pressure30.09 inHg
Wind8.9 mph N
Humidity53%
Visibility—
Dew point54°
Mon, 1971° / 52°0
71 °
Heiskell, Monday, 19 October
Clear. High 71°, low 52°.
Pressure30.15 inHg
Wind7.7 mph N
Humidity53%
Visibility—
Dew point49°
Tue, 2073° / 51°0
73 °
Heiskell, Tuesday, 20 October
Clear. High 73°, low 51°.
Pressure30.06 inHg
Wind6.3 mph N
Humidity43%
Visibility—
Dew point46°
Wed, 2170° / 50°0
70 °
Heiskell, Wednesday, 21 October
Overcast. High 70°, low 50°.
Pressure30.06 inHg
Wind5.9 mph NE
Humidity34%
Visibility—
Dew point37°
Thu, 2257° / 55°0.57
57 °
Heiskell, Thursday, 22 October
Rain. High 57°, low 55°.
Pressure29.97 inHg
Wind5 mph NE
Humidity93%
Visibility—
Dew point54°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2368° / 47°0.11
68 °
Heiskell, Friday, 23 October
Climate normal for this date — 60-year average.
Average high68°
Average low47°
Average precipitation0.11 in
Chance of precipitation23%
Record high79° (1963)
Record low35° (1976)
Sat, 2466° / 47°0.07
66 °
Heiskell, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high66°
Average low47°
Average precipitation0.07 in
Chance of precipitation25%
Record high79° (2001)
Record low32° (2006)
Sun, 2565° / 48°0.15
65 °
Heiskell, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.15 in
Chance of precipitation28%
Record high80° (2022)
Record low33° (2006)
Mon, 2666° / 48°0.1
66 °
Heiskell, Monday, 26 October
Climate normal for this date — 60-year average.
Average high66°
Average low48°
Average precipitation0.1 in
Chance of precipitation28%
Record high81° (2023)
Record low28° (1962)
Tue, 2765° / 48°0.17
65 °
Heiskell, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.17 in
Chance of precipitation30%
Record high81° (2023)
Record low31° (1962)
Wed, 2865° / 48°0.14
65 °
Heiskell, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high65°
Average low48°
Average precipitation0.14 in
Chance of precipitation33%
Record high82° (2023)
Record low30° (2001)
Thu, 2965° / 46°0.11
65 °
Heiskell, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high65°
Average low46°
Average precipitation0.11 in
Chance of precipitation22%
Record high82° (2016)
Record low28° (1976)
Fri, 3066° / 46°0.08
66 °
Heiskell, Friday, 30 October
Climate normal for this date — 60-year average.
Average high66°
Average low46°
Average precipitation0.08 in
Chance of precipitation23%
Record high81° (2016)
Record low33° (2017)
Sat, 3166° / 47°0.07
66 °
Heiskell, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high66°
Average low47°
Average precipitation0.07 in
Chance of precipitation23%
Record high81° (2016)
Record low34° (1993)
Sun, 0166° / 47°0.09
66 °
Heiskell, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high66°
Average low47°
Average precipitation0.09 in
Chance of precipitation28%
Record high83° (2016)
Record low30° (1993)
Mon, 0264° / 46°0.15
64 °
Heiskell, Monday, 2 November
Climate normal for this date — 60-year average.
Average high64°
Average low46°
Average precipitation0.15 in
Chance of precipitation33%
Record high79° (1961)
Record low29° (1993)
Tue, 0363° / 45°0.08
63 °
Heiskell, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high63°
Average low45°
Average precipitation0.08 in
Chance of precipitation28%
Record high79° (2016)
Record low26° (1966)
Wed, 0462° / 44°0.1
62 °
Heiskell, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high62°
Average low44°
Average precipitation0.1 in
Chance of precipitation33%
Record high77° (2003)
Record low22° (1966)
Thu, 0561° / 43°0.13
61 °
Heiskell, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high61°
Average low43°
Average precipitation0.13 in
Chance of precipitation33%
Record high79° (2024)
Record low23° (1991)
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 Heiskell, TN 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 Heiskell, TN 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.