Monthly outlook for Fairfax, SD: average high 68.6°, average low 48.2°. That is 6.5° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 3 days and 0.8 inches. The warmest day looks like 31 October (75.5°), the coolest 25 October (38.3°).
68.6°/48.2°
Average high / low
+6.5°
Above normal
0 / 3
Wet days / normal
0.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
18 October – 27 October
68°
59°
+5°
28 October – 6 November
69.6°
52.8°
+9.3°
7 November – 16 November
at normal
48.1°
—
October records over 66 years
91.8°2 October 1997All-time high
9.9°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Butte (8 mi).
Mon, 1963° / 44°0
63 °
Fairfax, Monday, 19 October
Overcast. High 63°, low 44°.
Pressure30.21 inHg
Wind5.1 mph E
Humidity66%
Visibility6.2 mi
Dew point45°
Tue, 2068° / 48°0
68 °
Fairfax, Tuesday, 20 October
Mostly clear. High 68°, low 48°.
Pressure30.15 inHg
Wind10.7 mph S
Humidity60%
Visibility6.2 mi
Dew point48°
Wed, 2170° / 53°0
70 °
Fairfax, Wednesday, 21 October
Clear. High 70°, low 53°.
Pressure30.12 inHg
Wind2.4 mph W
Humidity64%
Visibility6.2 mi
Dew point54°
Thu, 2274° / 51°0
74 °
Fairfax, Thursday, 22 October
Mostly clear. High 74°, low 51°.
Pressure30.12 inHg
Wind14.5 mph SE
Humidity60%
Visibility—
Dew point53°
Fri, 2375° / 60°0
75 °
Fairfax, Friday, 23 October
Overcast. High 75°, low 60°.
Pressure29.85 inHg
Wind22.1 mph S
Humidity49%
Visibility—
Dew point49°
Sat, 2464° / 45°0.02
64 °
Fairfax, Saturday, 24 October
Light rain. High 64°, low 45°.
Pressure30.27 inHg
Wind22.4 mph NW
Humidity42%
Visibility—
Dew point33°
Sun, 2560° / 38°0
60 °
Fairfax, Sunday, 25 October
Mostly clear. High 60°, low 38°.
Pressure30.47 inHg
Wind15.6 mph S
Humidity33%
Visibility—
Dew point24°
Mon, 2667° / 46°0
67 °
Fairfax, Monday, 26 October
Partly cloudy. High 67°, low 46°.
Pressure30.03 inHg
Wind15.8 mph S
Humidity51%
Visibility—
Dew point42°
Tue, 2770° / 47°0
70 °
Fairfax, Tuesday, 27 October
Partly cloudy. High 70°, low 47°.
Pressure29.94 inHg
Wind14.4 mph S
Humidity63%
Visibility—
Dew point49°
Wed, 2868° / 48°0
68 °
Fairfax, Wednesday, 28 October
Clear. High 68°, low 48°.
Pressure29.83 inHg
Wind11.9 mph S
Humidity25%
Visibility—
Dew point26°
Thu, 2966° / 46°0
66 °
Fairfax, Thursday, 29 October
Clear. High 66°, low 46°.
Pressure29.80 inHg
Wind8.5 mph SE
Humidity25%
Visibility—
Dew point25°
Fri, 3066° / 51°0
66 °
Fairfax, Friday, 30 October
Overcast. High 66°, low 51°.
Pressure29.62 inHg
Wind12.8 mph NW
Humidity26%
Visibility—
Dew point27°
Sat, 3175° / 49°0
75 °
Fairfax, Saturday, 31 October
Overcast. High 75°, low 49°.
Pressure29.56 inHg
Wind8.6 mph W
Humidity19%
Visibility—
Dew point24°
Sun, 0172° / 54°0
72 °
Fairfax, Sunday, 1 November
Overcast. High 72°, low 54°.
Pressure29.91 inHg
Wind11.2 mph N
Humidity22%
Visibility—
Dew point28°
Mon, 0269° / 46°0
69 °
Fairfax, Monday, 2 November
Partly cloudy. High 69°, low 46°.
Pressure30.18 inHg
Wind15.4 mph SE
Humidity29%
Visibility—
Dew point29°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0351° / 35°0.05
51 °
Fairfax, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.05 in
Chance of precipitation17%
Record high74° (1978)
Record low3° (1991)
Wed, 0452° / 33°0.01
52 °
Fairfax, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low33°
Average precipitation0.01 in
Chance of precipitation5%
Record high74° (1978)
Record low-10° (1991)
Thu, 0552° / 35°0.03
52 °
Fairfax, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low35°
Average precipitation0.03 in
Chance of precipitation12%
Record high76° (2020)
Record low15° (2003)
Fri, 0652° / 34°0.02
52 °
Fairfax, Friday, 6 November
Climate normal for this date — 60-year average.
Average high52°
Average low34°
Average precipitation0.02 in
Chance of precipitation12%
Record high80° (2020)
Record low7° (2003)
Sat, 0752° / 34°0.02
52 °
Fairfax, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high52°
Average low34°
Average precipitation0.02 in
Chance of precipitation13%
Record high77° (2020)
Record low-3° (1991)
Sun, 0851° / 34°0.06
51 °
Fairfax, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low34°
Average precipitation0.06 in
Chance of precipitation13%
Record high76° (2006)
Record low2° (1991)
Mon, 0948° / 33°0.09
48 °
Fairfax, Monday, 9 November
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.09 in
Chance of precipitation23%
Record high71° (2001)
Record low11° (2018)
Tue, 1047° / 30°0.04
47 °
Fairfax, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.04 in
Chance of precipitation20%
Record high68° (1989)
Record low1° (1986)
Wed, 1145° / 29°0.06
45 °
Fairfax, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high45°
Average low29°
Average precipitation0.06 in
Chance of precipitation23%
Record high74° (2005)
Record low-6° (1986)
Thu, 1246° / 29°0.05
46 °
Fairfax, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low29°
Average precipitation0.05 in
Chance of precipitation20%
Record high72° (1999)
Record low1° (1986)
Fri, 1348° / 31°0.03
48 °
Fairfax, Friday, 13 November
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.03 in
Chance of precipitation18%
Record high71° (1999)
Record low-11° (1986)
Sat, 1448° / 31°0.02
48 °
Fairfax, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high48°
Average low31°
Average precipitation0.02 in
Chance of precipitation13%
Record high80° (2025)
Record low9° (2000)
Sun, 1547° / 30°0.06
47 °
Fairfax, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.06 in
Chance of precipitation20%
Record high71° (2001)
Record low6° (2000)
Mon, 1649° / 30°0.05
49 °
Fairfax, Monday, 16 November
Climate normal for this date — 60-year average.
Average high49°
Average low30°
Average precipitation0.05 in
Chance of precipitation12%
Record high73° (2021)
Record low3° (2014)
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 Fairfax, 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 Fairfax, 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.