Monthly outlook for Dennis, SD: average high 63.7°, average low 41.6°. That is 2.6° above the climate normal for October. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 22 October (77.3°), the coolest 16 October (28.7°).
63.7°/41.6°
Average high / low
+2.6°
Above normal
3 / 3
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 October – 23 October
64°
60.4°
+2°
24 October – 2 November
63.3°
55°
+4.6°
3 November – 12 November
at normal
49.9°
—
October records over 66 years
91.2°4 October 1963All-time high
-6.7°31 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Dudley (4 mi).
Thu, 1551° / 35°0.07
51 °
Dennis, Thursday, 15 October
Light rain. High 51°, low 35°.
Pressure30.42 inHg
Wind21.1 mph NW
Humidity41%
Visibility6.2 mi
Dew point28°
Fri, 1654° / 29°0
54 °
Dennis, Friday, 16 October
Clear. High 54°, low 29°.
Pressure30.74 inHg
Wind4.1 mph W
Humidity50%
Visibility6.2 mi
Dew point20°
Sat, 1772° / 34°0
72 °
Dennis, Saturday, 17 October
Mostly clear. High 72°, low 34°.
Pressure30.15 inHg
Wind6.6 mph NW
Humidity29%
Visibility6.2 mi
Dew point27°
Sun, 1867° / 41°0
67 °
Dennis, Sunday, 18 October
Clear. High 67°, low 41°.
Pressure30.15 inHg
Wind4.5 mph SE
Humidity34%
Visibility6.2 mi
Dew point36°
Mon, 1966° / 39°0
66 °
Dennis, Monday, 19 October
Clear. High 66°, low 39°.
Pressure30.12 inHg
Wind7.7 mph E
Humidity49%
Visibility—
Dew point38°
Tue, 2074° / 46°0
74 °
Dennis, Tuesday, 20 October
Clear. High 74°, low 46°.
Pressure29.85 inHg
Wind10.2 mph S
Humidity33%
Visibility—
Dew point36°
Wed, 2167° / 51°0
67 °
Dennis, Wednesday, 21 October
Mostly clear. High 67°, low 51°.
Pressure29.94 inHg
Wind13.8 mph NW
Humidity33%
Visibility—
Dew point31°
Thu, 2277° / 47°0
77 °
Dennis, Thursday, 22 October
Clear. High 77°, low 47°.
Pressure29.88 inHg
Wind14.7 mph S
Humidity31%
Visibility—
Dew point36°
Fri, 2359° / 40°0.22
59 °
Dennis, Friday, 23 October
Light rain. High 59°, low 40°.
Pressure29.74 inHg
Wind24 mph NW
Humidity61%
Visibility—
Dew point42°
Sat, 2450° / 36°0
50 °
Dennis, Saturday, 24 October
Clear. High 50°, low 36°.
Pressure30.33 inHg
Wind22.6 mph NW
Humidity35%
Visibility—
Dew point19°
Sun, 2557° / 35°0
57 °
Dennis, Sunday, 25 October
Clear. High 57°, low 35°.
Pressure30.42 inHg
Wind11.2 mph NW
Humidity39%
Visibility—
Dew point25°
Mon, 2665° / 42°0
65 °
Dennis, Monday, 26 October
Clear. High 65°, low 42°.
Pressure30.09 inHg
Wind7.1 mph W
Humidity25%
Visibility—
Dew point22°
Tue, 2769° / 47°0
69 °
Dennis, Tuesday, 27 October
Partly cloudy. High 69°, low 47°.
Pressure29.85 inHg
Wind6.8 mph NW
Humidity25%
Visibility—
Dew point26°
Wed, 2868° / 50°0
68 °
Dennis, Wednesday, 28 October
Overcast. High 68°, low 50°.
Pressure29.80 inHg
Wind10.7 mph NW
Humidity26%
Visibility—
Dew point27°
Thu, 2971° / 48°0
71 °
Dennis, Thursday, 29 October
Partly cloudy. High 71°, low 48°.
Pressure29.91 inHg
Wind8 mph W
Humidity29%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 3053° / 33°0.04
53 °
Dennis, Friday, 30 October
Climate normal for this date — 60-year average.
Average high53°
Average low33°
Average precipitation0.04 in
Chance of precipitation25%
Record high77° (1968)
Record low-2° (1991)
Sat, 3152° / 33°0.03
52 °
Dennis, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high52°
Average low33°
Average precipitation0.03 in
Chance of precipitation20%
Record high77° (1999)
Record low-7° (1991)
Sun, 0151° / 33°0.05
51 °
Dennis, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high51°
Average low33°
Average precipitation0.05 in
Chance of precipitation18%
Record high73° (2008)
Record low4° (2002)
Mon, 0252° / 31°0.04
52 °
Dennis, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low31°
Average precipitation0.04 in
Chance of precipitation20%
Record high79° (2008)
Record low-5° (1991)
Tue, 0351° / 32°0.04
51 °
Dennis, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high51°
Average low32°
Average precipitation0.04 in
Chance of precipitation17%
Record high70° (1978)
Record low-5° (1991)
Wed, 0453° / 31°0.01
53 °
Dennis, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low31°
Average precipitation0.01 in
Chance of precipitation12%
Record high77° (1978)
Record low6° (1995)
Thu, 0553° / 31°0.02
53 °
Dennis, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low31°
Average precipitation0.02 in
Chance of precipitation13%
Record high74° (2001)
Record low4° (1967)
Fri, 0652° / 31°0.03
52 °
Dennis, Friday, 6 November
Climate normal for this date — 60-year average.
Average high52°
Average low31°
Average precipitation0.03 in
Chance of precipitation15%
Record high75° (1980)
Record low-10° (2003)
Sat, 0751° / 30°0.03
51 °
Dennis, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low30°
Average precipitation0.03 in
Chance of precipitation13%
Record high74° (2006)
Record low-7° (2003)
Sun, 0850° / 30°0.06
50 °
Dennis, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high50°
Average low30°
Average precipitation0.06 in
Chance of precipitation20%
Record high78° (1999)
Record low2° (2003)
Mon, 0947° / 29°0.04
47 °
Dennis, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.04 in
Chance of precipitation23%
Record high69° (2016)
Record low6° (2003)
Tue, 1047° / 28°0.03
47 °
Dennis, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.03 in
Chance of precipitation20%
Record high68° (2007)
Record low-12° (1986)
Wed, 1146° / 27°0.03
46 °
Dennis, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high46°
Average low27°
Average precipitation0.03 in
Chance of precipitation18%
Record high71° (2005)
Record low-17° (1986)
Thu, 1248° / 28°0.03
48 °
Dennis, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high48°
Average low28°
Average precipitation0.03 in
Chance of precipitation12%
Record high72° (1999)
Record low-9° (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 Dennis, SD 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 Dennis, SD 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.