Monthly outlook for Westport, SD: average high 54.9°, average low 39.9°. That is 0.6° above the climate normal for October. Precipitation is expected on 4 days (about 0.8 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 22 October (70.9°), the coolest 30 October (20.1°).
54.9°/39.9°
Average high / low
+0.6°
Above normal
4 / 3
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
62.2°
55.1°
+3.9°
25 October – 3 November
42.7°
50.2°
-4.2°
4 November – 13 November
at normal
43.2°
—
October records over 66 years
87.1°3 October 2025All-time high
7.3°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Frederick (13 mi).
Fri, 1651° / 38°0
51 °
Westport, Friday, 16 October
Clear. High 51°, low 38°.
Pressure30.71 inHg
Wind9.6 mph NW
Humidity59%
Visibility6.2 mi
Dew point29°
Sat, 1762° / 39°0
62 °
Westport, Saturday, 17 October
Clear. High 62°, low 39°.
Pressure30.18 inHg
Wind14 mph S
Humidity45%
Visibility6.2 mi
Dew point31°
Sun, 1867° / 43°0
67 °
Westport, Sunday, 18 October
Clear. High 67°, low 43°.
Pressure30.09 inHg
Wind4.4 mph NE
Humidity52%
Visibility6.2 mi
Dew point43°
Mon, 1964° / 43°0
64 °
Westport, Monday, 19 October
Clear. High 64°, low 43°.
Pressure30.18 inHg
Wind7.6 mph NE
Humidity59%
Visibility—
Dew point43°
Tue, 2065° / 44°0
65 °
Westport, Tuesday, 20 October
Mostly clear. High 65°, low 44°.
Pressure30.12 inHg
Wind8.8 mph SE
Humidity69%
Visibility—
Dew point48°
Wed, 2169° / 54°0.04
69 °
Westport, Wednesday, 21 October
Light rain. High 69°, low 54°.
Pressure29.97 inHg
Wind18.9 mph S
Humidity56%
Visibility—
Dew point51°
Thu, 2271° / 60°0
71 °
Westport, Thursday, 22 October
Overcast. High 71°, low 60°.
Pressure29.80 inHg
Wind17.9 mph S
Humidity63%
Visibility—
Dew point56°
Fri, 2363° / 57°0.35
63 °
Westport, Friday, 23 October
Rain. High 63°, low 57°.
Pressure29.56 inHg
Wind20.7 mph S
Humidity88%
Visibility—
Dew point57°
Sat, 2457° / 39°0.18
57 °
Westport, Saturday, 24 October
Light rain. High 57°, low 39°.
Pressure29.91 inHg
Wind26.5 mph NW
Humidity63%
Visibility—
Dew point31°
Sun, 2546° / 34°0
46 °
Westport, Sunday, 25 October
Overcast. High 46°, low 34°.
Pressure30.24 inHg
Wind18.7 mph NW
Humidity40%
Visibility—
Dew point20°
Mon, 2644° / 27°0
44 °
Westport, Monday, 26 October
Overcast. High 44°, low 27°.
Pressure30.42 inHg
Wind10 mph NW
Humidity34%
Visibility—
Dew point12°
Tue, 2749° / 26°0
49 °
Westport, Tuesday, 27 October
Mostly clear. High 49°, low 26°.
Pressure30.24 inHg
Wind9.6 mph SW
Humidity43%
Visibility—
Dew point20°
Wed, 2846° / 39°0
46 °
Westport, Wednesday, 28 October
Overcast. High 46°, low 39°.
Pressure30.09 inHg
Wind11.8 mph NW
Humidity53%
Visibility—
Dew point27°
Thu, 2936° / 31°0.06
36 °
Westport, Thursday, 29 October
Snow. High 36°, low 31°.
Pressure30.27 inHg
Wind13 mph N
Humidity89%
Visibility—
Dew point32°
Fri, 3035° / 20°0
35 °
Westport, Friday, 30 October
Clear. High 35°, low 20°.
Pressure30.71 inHg
Wind9.6 mph N
Humidity50%
Visibility—
Dew point14°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3149° / 33°0.06
49 °
Westport, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high49°
Average low33°
Average precipitation0.06 in
Chance of precipitation22%
Record high72° (2016)
Record low18° (2002)
Sun, 0148° / 33°0.06
48 °
Westport, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.06 in
Chance of precipitation23%
Record high73° (1990)
Record low13° (1984)
Mon, 0248° / 32°0.02
48 °
Westport, Monday, 2 November
Climate normal for this date — 60-year average.
Average high48°
Average low32°
Average precipitation0.02 in
Chance of precipitation10%
Record high72° (2022)
Record low10° (1991)
Tue, 0347° / 32°0.04
47 °
Westport, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high47°
Average low32°
Average precipitation0.04 in
Chance of precipitation15%
Record high71° (1978)
Record low6° (1991)
Wed, 0447° / 30°0.02
47 °
Westport, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.02 in
Chance of precipitation12%
Record high71° (2020)
Record low7° (1991)
Thu, 0547° / 31°0.04
47 °
Westport, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.04 in
Chance of precipitation20%
Record high67° (2016)
Record low8° (2003)
Fri, 0646° / 31°0.02
46 °
Westport, Friday, 6 November
Climate normal for this date — 60-year average.
Average high46°
Average low31°
Average precipitation0.02 in
Chance of precipitation12%
Record high69° (2020)
Record low4° (2003)
Sat, 0746° / 29°0.04
46 °
Westport, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high46°
Average low29°
Average precipitation0.04 in
Chance of precipitation13%
Record high64° (1999)
Record low3° (1991)
Sun, 0845° / 30°0.06
45 °
Westport, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high45°
Average low30°
Average precipitation0.06 in
Chance of precipitation18%
Record high70° (1978)
Record low3° (2003)
Mon, 0942° / 28°0.04
42 °
Westport, Monday, 9 November
Climate normal for this date — 60-year average.
Average high42°
Average low28°
Average precipitation0.04 in
Chance of precipitation18%
Record high64° (2010)
Record low10° (2018)
Tue, 1040° / 26°0.07
40 °
Westport, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high40°
Average low26°
Average precipitation0.07 in
Chance of precipitation22%
Record high60° (2016)
Record low2° (1986)
Wed, 1139° / 25°0.02
39 °
Westport, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high39°
Average low25°
Average precipitation0.02 in
Chance of precipitation10%
Record high62° (2005)
Record low1° (1986)
Thu, 1240° / 25°0.04
40 °
Westport, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high40°
Average low25°
Average precipitation0.04 in
Chance of precipitation17%
Record high63° (1999)
Record low1° (1986)
Fri, 1342° / 26°0.03
42 °
Westport, Friday, 13 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.03 in
Chance of precipitation17%
Record high66° (1999)
Record low-3° (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 Westport, 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 Westport, 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.