Monthly outlook for Buffalo, SD: average high 58.9°, average low 42.7°. That is 0.6° above the climate normal for October. Precipitation is expected on 5 days (about 1.6 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 9 October (83.2°), the coolest 16 October (33.5°).
58.9°/42.7°
Average high / low
+0.6°
Above normal
5 / 3
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
60.1°
58.4°
+0.9°
18 October – 27 October
56.8°
56.1°
+0.4°
28 October – 6 November
at normal
49.4°
—
October records over 66 years
91.8°3 October 2025All-time high
-8.3°30 October 1991All-time low
Fri, 0983° / 47°0
83 °
Buffalo, Friday, 9 October
Overcast. High 83°, low 47°.
Pressure29.65 inHg
Wind7.7 mph S
Humidity36%
Visibility6.2 mi
Dew point44°
Sat, 1075° / 55°0.01
75 °
Buffalo, Saturday, 10 October
Light rain. High 75°, low 55°.
Pressure29.53 inHg
Wind9.4 mph N
Humidity27%
Visibility6.2 mi
Dew point36°
Sun, 1153° / 44°0.17
53 °
Buffalo, Sunday, 11 October
Rain. High 53°, low 44°.
Pressure29.91 inHg
Wind11.7 mph N
Humidity82%
Visibility6.2 mi
Dew point44°
Mon, 1247° / 41°0.1
47 °
Buffalo, Monday, 12 October
Light rain. High 47°, low 41°.
Pressure29.97 inHg
Wind7.1 mph E
Humidity87%
Visibility4.2 mi
Dew point41°
Tue, 1352° / 40°0.02
52 °
Buffalo, Tuesday, 13 October
Light rain. High 52°, low 40°.
Pressure30.12 inHg
Wind10 mph E
Humidity71%
Visibility—
Dew point39°
Wed, 1465° / 47°0.11
65 °
Buffalo, Wednesday, 14 October
Light rain. High 65°, low 47°.
Pressure29.50 inHg
Wind11 mph E
Humidity58%
Visibility—
Dew point47°
Thu, 1556° / 36°1.14
56 °
Buffalo, Thursday, 15 October
Snow. High 56°, low 36°.
Pressure29.88 inHg
Wind27.4 mph NW
Humidity89%
Visibility—
Dew point42°
Fri, 1644° / 33°0.02
44 °
Buffalo, Friday, 16 October
Light snow. High 44°, low 33°.
Pressure30.65 inHg
Wind19.2 mph NW
Humidity54%
Visibility—
Dew point24°
Sat, 1757° / 35°0
57 °
Buffalo, Saturday, 17 October
Clear. High 57°, low 35°.
Pressure30.36 inHg
Wind26.3 mph SE
Humidity49%
Visibility—
Dew point30°
Sun, 1850° / 47°0.06
50 °
Buffalo, Sunday, 18 October
Light rain. High 50°, low 47°.
Pressure29.97 inHg
Wind19 mph S
Humidity69%
Visibility—
Dew point39°
Mon, 1964° / 43°0.01
64 °
Buffalo, Monday, 19 October
Light rain. High 64°, low 43°.
Pressure30.00 inHg
Wind17.9 mph W
Humidity37%
Visibility—
Dew point30°
Tue, 2062° / 46°0
62 °
Buffalo, Tuesday, 20 October
Overcast. High 62°, low 46°.
Pressure30.18 inHg
Wind14.7 mph W
Humidity37%
Visibility—
Dew point31°
Wed, 2161° / 46°0
61 °
Buffalo, Wednesday, 21 October
Overcast. High 61°, low 46°.
Pressure29.94 inHg
Wind35.3 mph NW
Humidity30%
Visibility—
Dew point28°
Thu, 2250° / 38°0
50 °
Buffalo, Thursday, 22 October
Clear. High 50°, low 38°.
Pressure30.24 inHg
Wind30.8 mph NW
Humidity43%
Visibility—
Dew point24°
Fri, 2354° / 42°0
54 °
Buffalo, Friday, 23 October
Overcast. High 54°, low 42°.
Pressure29.62 inHg
Wind19.6 mph SE
Humidity34%
Visibility—
Dew point21°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2455° / 36°0.02
55 °
Buffalo, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high55°
Average low36°
Average precipitation0.02 in
Chance of precipitation15%
Record high76° (1989)
Record low15° (2020)
Sun, 2556° / 35°0.01
56 °
Buffalo, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high56°
Average low35°
Average precipitation0.01 in
Chance of precipitation8%
Record high74° (2017)
Record low6° (2020)
Mon, 2655° / 35°0.03
55 °
Buffalo, Monday, 26 October
Climate normal for this date — 60-year average.
Average high55°
Average low35°
Average precipitation0.03 in
Chance of precipitation15%
Record high76° (1990)
Record low-4° (2020)
Tue, 2753° / 34°0.03
53 °
Buffalo, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high53°
Average low34°
Average precipitation0.03 in
Chance of precipitation18%
Record high75° (1983)
Record low11° (2023)
Wed, 2852° / 33°0.06
52 °
Buffalo, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high52°
Average low33°
Average precipitation0.06 in
Chance of precipitation18%
Record high77° (1985)
Record low10° (2023)
Thu, 2951° / 33°0.09
51 °
Buffalo, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high51°
Average low33°
Average precipitation0.09 in
Chance of precipitation28%
Record high77° (1968)
Record low3° (1991)
Fri, 3049° / 32°0.02
49 °
Buffalo, Friday, 30 October
Climate normal for this date — 60-year average.
Average high49°
Average low32°
Average precipitation0.02 in
Chance of precipitation12%
Record high76° (1968)
Record low-8° (1991)
Sat, 3150° / 32°0.04
50 °
Buffalo, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high50°
Average low32°
Average precipitation0.04 in
Chance of precipitation8%
Record high74° (1990)
Record low-3° (1991)
Sun, 0149° / 32°0.05
49 °
Buffalo, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high49°
Average low32°
Average precipitation0.05 in
Chance of precipitation15%
Record high73° (1965)
Record low6° (1991)
Mon, 0249° / 31°0.02
49 °
Buffalo, Monday, 2 November
Climate normal for this date — 60-year average.
Average high49°
Average low31°
Average precipitation0.02 in
Chance of precipitation8%
Record high74° (1965)
Record low-6° (1991)
Tue, 0348° / 31°0.02
48 °
Buffalo, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.02 in
Chance of precipitation13%
Record high69° (2020)
Record low-8° (1991)
Wed, 0450° / 30°0.02
50 °
Buffalo, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high50°
Average low30°
Average precipitation0.02 in
Chance of precipitation15%
Record high74° (1978)
Record low2° (1991)
Thu, 0548° / 30°0.03
48 °
Buffalo, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.03 in
Chance of precipitation18%
Record high71° (2001)
Record low2° (2003)
Fri, 0648° / 29°0.04
48 °
Buffalo, Friday, 6 November
Climate normal for this date — 60-year average.
Average high48°
Average low29°
Average precipitation0.04 in
Chance of precipitation15%
Record high72° (2009)
Record low4° (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 Buffalo, 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 Buffalo, 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.