Monthly outlook for Big Bend, SD: average high 55.3°, average low 38.5°. That is 0.5° below the climate normal for October. Precipitation is expected on 4 days (about 0.7 inches), against a normal of 3 days and 0.8 inches. The warmest day looks like 20 October (73.5°), the coolest 16 October (26.4°).
55.3°/38.5°
Average high / low
−0.5°
Below normal
4 / 3
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
13 October – 22 October
57.7°
57.3°
+0.2°
23 October – 1 November
51.4°
52.7°
-0.7°
2 November – 11 November
at normal
47.6°
—
October records over 66 years
89.2°3 October 2025All-time high
-6.2°26 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Blackhawk (7 mi).
Wed, 1445° / 39°0.29
45 °
Big Bend, Wednesday, 14 October
Rain. High 45°, low 39°.
Pressure30.18 inHg
Wind5 mph S
Humidity80%
Visibility6.2 mi
Dew point41°
Thu, 1551° / 36°0.08
51 °
Big Bend, Thursday, 15 October
Light rain. High 51°, low 36°.
Pressure30.42 inHg
Wind16.2 mph N
Humidity41%
Visibility6.2 mi
Dew point18°
Fri, 1659° / 26°0
59 °
Big Bend, Friday, 16 October
Clear. High 59°, low 26°.
Pressure30.56 inHg
Wind6.6 mph SE
Humidity41%
Visibility6.2 mi
Dew point21°
Sat, 1771° / 51°0
71 °
Big Bend, Saturday, 17 October
Mostly clear. High 71°, low 51°.
Pressure29.94 inHg
Wind15 mph W
Humidity21%
Visibility—
Dew point27°
Sun, 1861° / 46°0
61 °
Big Bend, Sunday, 18 October
Partly cloudy. High 61°, low 46°.
Pressure30.00 inHg
Wind10.9 mph W
Humidity35%
Visibility—
Dew point31°
Mon, 1970° / 43°0
70 °
Big Bend, Monday, 19 October
Clear. High 70°, low 43°.
Pressure29.83 inHg
Wind15.5 mph S
Humidity26%
Visibility—
Dew point29°
Tue, 2073° / 52°0
73 °
Big Bend, Tuesday, 20 October
Partly cloudy. High 73°, low 52°.
Pressure29.65 inHg
Wind10.8 mph SW
Humidity20%
Visibility—
Dew point27°
Wed, 2158° / 44°0.01
58 °
Big Bend, Wednesday, 21 October
Light rain. High 58°, low 44°.
Pressure29.68 inHg
Wind15.9 mph NW
Humidity49%
Visibility—
Dew point38°
Thu, 2245° / 38°0.11
45 °
Big Bend, Thursday, 22 October
Light rain. High 45°, low 38°.
Pressure29.83 inHg
Wind9.6 mph NW
Humidity77%
Visibility—
Dew point35°
Fri, 2346° / 35°0
46 °
Big Bend, Friday, 23 October
Mostly clear. High 46°, low 35°.
Pressure30.06 inHg
Wind18.2 mph NW
Humidity49%
Visibility—
Dew point26°
Sat, 2448° / 30°0
48 °
Big Bend, Saturday, 24 October
Overcast. High 48°, low 30°.
Pressure30.27 inHg
Wind8.6 mph E
Humidity35%
Visibility—
Dew point19°
Sun, 2549° / 33°0
49 °
Big Bend, Sunday, 25 October
Overcast. High 49°, low 33°.
Pressure30.09 inHg
Wind7.8 mph E
Humidity40%
Visibility—
Dew point24°
Mon, 2647° / 34°0
47 °
Big Bend, Monday, 26 October
Overcast. High 47°, low 34°.
Pressure30.27 inHg
Wind7.5 mph E
Humidity48%
Visibility—
Dew point26°
Tue, 2756° / 35°0
56 °
Big Bend, Tuesday, 27 October
Clear. High 56°, low 35°.
Pressure30.15 inHg
Wind8.6 mph NW
Humidity28%
Visibility—
Dew point20°
Wed, 2862° / 38°0
62 °
Big Bend, Wednesday, 28 October
Clear. High 62°, low 38°.
Pressure29.94 inHg
Wind6.3 mph W
Humidity35%
Visibility—
Dew point29°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 2951° / 33°0.09
51 °
Big Bend, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high51°
Average low33°
Average precipitation0.09 in
Chance of precipitation33%
Record high74° (1968)
Record low2° (1991)
Fri, 3050° / 33°0.04
50 °
Big Bend, Friday, 30 October
Climate normal for this date — 60-year average.
Average high50°
Average low33°
Average precipitation0.04 in
Chance of precipitation17%
Record high75° (1968)
Record low-3° (1991)
Sat, 3150° / 32°0.04
50 °
Big Bend, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high50°
Average low32°
Average precipitation0.04 in
Chance of precipitation15%
Record high73° (1990)
Record low1° (2002)
Sun, 0149° / 32°0.06
49 °
Big Bend, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high49°
Average low32°
Average precipitation0.06 in
Chance of precipitation17%
Record high72° (2022)
Record low-2° (2002)
Mon, 0249° / 31°0.04
49 °
Big Bend, Monday, 2 November
Climate normal for this date — 60-year average.
Average high49°
Average low31°
Average precipitation0.04 in
Chance of precipitation18%
Record high73° (2008)
Record low-3° (1991)
Tue, 0349° / 32°0.04
49 °
Big Bend, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high49°
Average low32°
Average precipitation0.04 in
Chance of precipitation20%
Record high74° (2020)
Record low2° (1991)
Wed, 0451° / 31°0.01
51 °
Big Bend, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low31°
Average precipitation0.01 in
Chance of precipitation8%
Record high73° (1978)
Record low8° (1995)
Thu, 0550° / 31°0.03
50 °
Big Bend, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high50°
Average low31°
Average precipitation0.03 in
Chance of precipitation17%
Record high77° (2020)
Record low2° (2003)
Fri, 0649° / 30°0.05
49 °
Big Bend, Friday, 6 November
Climate normal for this date — 60-year average.
Average high49°
Average low30°
Average precipitation0.05 in
Chance of precipitation13%
Record high74° (2020)
Record low1° (2003)
Sat, 0749° / 30°0.04
49 °
Big Bend, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high49°
Average low30°
Average precipitation0.04 in
Chance of precipitation13%
Record high76° (2020)
Record low5° (1991)
Sun, 0847° / 29°0.07
47 °
Big Bend, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.07 in
Chance of precipitation18%
Record high76° (1999)
Record low3° (2003)
Mon, 0944° / 28°0.07
44 °
Big Bend, Monday, 9 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.07 in
Chance of precipitation23%
Record high69° (2001)
Record low0° (1966)
Tue, 1045° / 26°0.04
45 °
Big Bend, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high45°
Average low26°
Average precipitation0.04 in
Chance of precipitation18%
Record high67° (2005)
Record low-5° (1986)
Wed, 1143° / 26°0.02
43 °
Big Bend, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.02 in
Chance of precipitation17%
Record high68° (2005)
Record low-4° (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 Big Bend, 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 Big Bend, 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.