Monthly outlook for Seneca, SD: average high 60.4°, average low 43.5°. That is 1.1° above the climate normal for October. Precipitation is expected on 3 days (about 1.0 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 10 October (84.1°), the coolest 17 October (32.6°).
60.4°/43.5°
Average high / low
+1.1°
Above normal
3 / 3
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
7 October – 16 October
62.5°
59.5°
+1.6°
17 October – 26 October
57°
55.7°
+0.7°
27 October – 5 November
at normal
49.5°
—
October records over 66 years
91.4°5 October 1963All-time high
7.5°26 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Brentwood Colony (12 mi).
Thu, 0872° / 45°0
72 °
Seneca, Thursday, 8 October
Overcast. High 72°, low 45°.
Pressure30.06 inHg
Wind9.4 mph SE
Humidity46%
Visibility6.2 mi
Dew point43°
Fri, 0978° / 45°0
78 °
Seneca, Friday, 9 October
Clear. High 78°, low 45°.
Pressure29.80 inHg
Wind9.6 mph SE
Humidity74%
Visibility6.2 mi
Dew point59°
Sat, 1084° / 66°0
84 °
Seneca, Saturday, 10 October
Clear. High 84°, low 66°.
Pressure29.50 inHg
Wind15.3 mph SW
Humidity36%
Visibility6.2 mi
Dew point49°
Sun, 1158° / 47°0.01
58 °
Seneca, Sunday, 11 October
Light rain. High 58°, low 47°.
Pressure29.80 inHg
Wind15.2 mph N
Humidity75%
Visibility6.2 mi
Dew point47°
Mon, 1247° / 42°0.25
47 °
Seneca, Monday, 12 October
Rain. High 47°, low 42°.
Pressure30.03 inHg
Wind12.3 mph NW
Humidity82%
Visibility—
Dew point39°
Tue, 1357° / 37°0
57 °
Seneca, Tuesday, 13 October
Partly cloudy. High 57°, low 37°.
Pressure30.24 inHg
Wind17.5 mph S
Humidity52%
Visibility—
Dew point31°
Wed, 1463° / 54°0.25
63 °
Seneca, Wednesday, 14 October
Rain. High 63°, low 54°.
Pressure29.53 inHg
Wind19 mph S
Humidity68%
Visibility—
Dew point51°
Thu, 1554° / 41°0.44
54 °
Seneca, Thursday, 15 October
Rain. High 54°, low 41°.
Pressure29.83 inHg
Wind19.1 mph N
Humidity80%
Visibility—
Dew point41°
Fri, 1640° / 37°0.03
40 °
Seneca, Friday, 16 October
Light snow. High 40°, low 37°.
Pressure30.27 inHg
Wind18.2 mph NW
Humidity78%
Visibility—
Dew point32°
Sat, 1746° / 33°0
46 °
Seneca, Saturday, 17 October
Overcast. High 46°, low 33°.
Pressure30.24 inHg
Wind12.2 mph NW
Humidity52%
Visibility—
Dew point26°
Sun, 1858° / 35°0
58 °
Seneca, Sunday, 18 October
Overcast. High 58°, low 35°.
Pressure30.09 inHg
Wind11 mph SW
Humidity36%
Visibility—
Dew point25°
Mon, 1961° / 46°0
61 °
Seneca, Monday, 19 October
Clear. High 61°, low 46°.
Pressure30.09 inHg
Wind16 mph NW
Humidity34%
Visibility—
Dew point31°
Tue, 2052° / 38°0
52 °
Seneca, Tuesday, 20 October
Clear. High 52°, low 38°.
Pressure30.39 inHg
Wind8.3 mph SE
Humidity49%
Visibility—
Dew point29°
Wed, 2166° / 42°0
66 °
Seneca, Wednesday, 21 October
Partly cloudy. High 66°, low 42°.
Pressure29.74 inHg
Wind20 mph S
Humidity44%
Visibility—
Dew point36°
Thu, 2258° / 44°0
58 °
Seneca, Thursday, 22 October
Light rain. High 58°, low 44°.
Pressure29.47 inHg
Wind18.5 mph W
Humidity34%
Visibility—
Dew point28°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 2354° / 37°0.04
54 °
Seneca, Friday, 23 October
Climate normal for this date — 60-year average.
Average high54°
Average low37°
Average precipitation0.04 in
Chance of precipitation20%
Record high76° (1963)
Record low13° (2020)
Sat, 2454° / 37°0.03
54 °
Seneca, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high54°
Average low37°
Average precipitation0.03 in
Chance of precipitation18%
Record high79° (1989)
Record low12° (2020)
Sun, 2555° / 37°0.02
55 °
Seneca, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high55°
Average low37°
Average precipitation0.02 in
Chance of precipitation12%
Record high79° (1989)
Record low14° (2020)
Mon, 2654° / 37°0.03
54 °
Seneca, Monday, 26 October
Climate normal for this date — 60-year average.
Average high54°
Average low37°
Average precipitation0.03 in
Chance of precipitation17%
Record high75° (1990)
Record low8° (2020)
Tue, 2753° / 36°0.03
53 °
Seneca, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high53°
Average low36°
Average precipitation0.03 in
Chance of precipitation22%
Record high71° (1966)
Record low9° (2020)
Wed, 2852° / 35°0.05
52 °
Seneca, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high52°
Average low35°
Average precipitation0.05 in
Chance of precipitation13%
Record high73° (2016)
Record low19° (2023)
Thu, 2951° / 35°0.08
51 °
Seneca, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.08 in
Chance of precipitation32%
Record high69° (1978)
Record low14° (1991)
Fri, 3050° / 34°0.06
50 °
Seneca, Friday, 30 October
Climate normal for this date — 60-year average.
Average high50°
Average low34°
Average precipitation0.06 in
Chance of precipitation22%
Record high71° (1965)
Record low9° (1991)
Sat, 3150° / 34°0.04
50 °
Seneca, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high50°
Average low34°
Average precipitation0.04 in
Chance of precipitation17%
Record high74° (1990)
Record low14° (1991)
Sun, 0149° / 33°0.04
49 °
Seneca, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high49°
Average low33°
Average precipitation0.04 in
Chance of precipitation18%
Record high73° (1990)
Record low14° (1984)
Mon, 0249° / 33°0.02
49 °
Seneca, Monday, 2 November
Climate normal for this date — 60-year average.
Average high49°
Average low33°
Average precipitation0.02 in
Chance of precipitation7%
Record high73° (1978)
Record low8° (1991)
Tue, 0347° / 33°0.03
47 °
Seneca, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.03 in
Chance of precipitation13%
Record high70° (1978)
Record low4° (1991)
Wed, 0448° / 31°0.01
48 °
Seneca, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.01 in
Chance of precipitation8%
Record high71° (1978)
Record low4° (1991)
Thu, 0547° / 31°0.04
47 °
Seneca, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.04 in
Chance of precipitation17%
Record high72° (2016)
Record low6° (2003)
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 Seneca, 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 Seneca, 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.