Monthly outlook for Fairfax, SD: average high 62.1°, average low 44.2°. That is 3.1° above the climate normal for October. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 3 days and 0.8 inches. The warmest day looks like 22 October (76.2°), the coolest 28 October (24.6°).
62.1°/44.2°
Average high / low
+3.1°
Above normal
1 / 3
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
63°
58.6°
+2.5°
29 October – 7 November
60.4°
52.5°
+4.4°
8 November – 17 November
at normal
47.6°
—
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).
Tue, 2070° / 47°0
70 °
Fairfax, Tuesday, 20 October
Clear. High 70°, low 47°.
Pressure30.15 inHg
Wind10.9 mph S
Humidity56%
Visibility6.2 mi
Dew point47°
Wed, 2170° / 51°0
70 °
Fairfax, Wednesday, 21 October
Clear. High 70°, low 51°.
Pressure30.15 inHg
Wind4.6 mph NE
Humidity69%
Visibility6.2 mi
Dew point54°
Thu, 2276° / 55°0
76 °
Fairfax, Thursday, 22 October
Clear. High 76°, low 55°.
Pressure30.12 inHg
Wind9.4 mph S
Humidity61%
Visibility6.2 mi
Dew point56°
Fri, 2375° / 61°0
75 °
Fairfax, Friday, 23 October
Overcast. High 75°, low 61°.
Pressure29.83 inHg
Wind21.5 mph SE
Humidity46%
Visibility—
Dew point49°
Sat, 2467° / 55°0.08
67 °
Fairfax, Saturday, 24 October
Light rain. High 67°, low 55°.
Pressure30.00 inHg
Wind16.7 mph S
Humidity82%
Visibility—
Dew point59°
Sun, 2567° / 45°0
67 °
Fairfax, Sunday, 25 October
Clear. High 67°, low 45°.
Pressure30.21 inHg
Wind14.5 mph W
Humidity20%
Visibility—
Dew point19°
Mon, 2657° / 40°0
57 °
Fairfax, Monday, 26 October
Clear. High 57°, low 40°.
Pressure30.12 inHg
Wind20.6 mph N
Humidity36%
Visibility—
Dew point25°
Tue, 2739° / 32°0
39 °
Fairfax, Tuesday, 27 October
Overcast. High 39°, low 32°.
Pressure30.50 inHg
Wind14.1 mph N
Humidity56%
Visibility—
Dew point23°
Wed, 2843° / 25°0
43 °
Fairfax, Wednesday, 28 October
Clear. High 43°, low 25°.
Pressure30.59 inHg
Wind7.6 mph S
Humidity33%
Visibility—
Dew point11°
Thu, 2954° / 29°0
54 °
Fairfax, Thursday, 29 October
Clear. High 54°, low 29°.
Pressure30.21 inHg
Wind16.1 mph S
Humidity31%
Visibility—
Dew point18°
Fri, 3057° / 38°0
57 °
Fairfax, Friday, 30 October
Overcast. High 57°, low 38°.
Pressure30.09 inHg
Wind24.5 mph S
Humidity42%
Visibility—
Dew point28°
Sat, 3169° / 47°0
69 °
Fairfax, Saturday, 31 October
Overcast. High 69°, low 47°.
Pressure29.85 inHg
Wind20.5 mph S
Humidity49%
Visibility—
Dew point39°
Sun, 0167° / 53°0
67 °
Fairfax, Sunday, 1 November
Overcast. High 67°, low 53°.
Pressure29.88 inHg
Wind18.2 mph SE
Humidity44%
Visibility—
Dew point43°
Mon, 0260° / 49°0.02
60 °
Fairfax, Monday, 2 November
Light rain. High 60°, low 49°.
Pressure29.83 inHg
Wind21 mph NW
Humidity62%
Visibility—
Dew point47°
Tue, 0355° / 39°0
55 °
Fairfax, Tuesday, 3 November
Clear. High 55°, low 39°.
Pressure30.42 inHg
Wind8.2 mph NW
Humidity43%
Visibility—
Dew point28°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Tue, 1746° / 30°0.04
46 °
Fairfax, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high46°
Average low30°
Average precipitation0.04 in
Chance of precipitation18%
Record high68° (2001)
Record low-1° (2000)
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.