Monthly outlook for Hartley, SD: average high 58.9°, average low 41.8°. That is 0.1° above the climate normal for October. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 22 October (77.6°), the coolest 27 October (34.6°).
58.9°/41.8°
Average high / low
+0.1°
Above normal
3 / 3
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
64.5°
60.7°
+2.1°
26 October – 4 November
49.7°
54.6°
-2.7°
5 November – 14 November
at normal
48.7°
—
October records over 66 years
96.1°4 October 1963All-time high
-5.3°26 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Bridger (11 mi).
Sat, 1773° / 43°0
73 °
Hartley, Saturday, 17 October
Clear. High 73°, low 43°.
Pressure30.06 inHg
Wind3 mph W
Humidity36%
Visibility6.2 mi
Dew point36°
Sun, 1868° / 43°0
68 °
Hartley, Sunday, 18 October
Clear. High 68°, low 43°.
Pressure30.06 inHg
Wind11.4 mph N
Humidity38%
Visibility6.2 mi
Dew point39°
Mon, 1963° / 41°0
63 °
Hartley, Monday, 19 October
Clear. High 63°, low 41°.
Pressure30.06 inHg
Wind3.8 mph E
Humidity60%
Visibility6.2 mi
Dew point44°
Tue, 2072° / 46°0
72 °
Hartley, Tuesday, 20 October
Clear. High 72°, low 46°.
Pressure29.88 inHg
Wind11.5 mph SE
Humidity51%
Visibility—
Dew point45°
Wed, 2174° / 52°0
74 °
Hartley, Wednesday, 21 October
Clear. High 74°, low 52°.
Pressure29.94 inHg
Wind8 mph NW
Humidity45%
Visibility—
Dew point45°
Thu, 2278° / 57°0
78 °
Hartley, Thursday, 22 October
Light rain. High 78°, low 57°.
Pressure29.83 inHg
Wind16 mph SE
Humidity43%
Visibility—
Dew point48°
Fri, 2367° / 45°0.29
67 °
Hartley, Friday, 23 October
Rain. High 67°, low 45°.
Pressure29.50 inHg
Wind26.5 mph NW
Humidity76%
Visibility—
Dew point54°
Sat, 2444° / 39°0.07
44 °
Hartley, Saturday, 24 October
Light rain. High 44°, low 39°.
Pressure30.12 inHg
Wind33.5 mph W
Humidity54%
Visibility—
Dew point28°
Sun, 2550° / 36°0
50 °
Hartley, Sunday, 25 October
Clear. High 50°, low 36°.
Pressure30.42 inHg
Wind14.5 mph NW
Humidity33%
Visibility—
Dew point18°
Mon, 2647° / 37°0
47 °
Hartley, Monday, 26 October
Overcast. High 47°, low 37°.
Pressure30.12 inHg
Wind11.9 mph SE
Humidity44%
Visibility—
Dew point24°
Tue, 2736° / 35°0.16
36 °
Hartley, Tuesday, 27 October
Snow. High 36°, low 35°.
Pressure30.12 inHg
Wind8.1 mph E
Humidity94%
Visibility—
Dew point34°
Wed, 2848° / 35°0
48 °
Hartley, Wednesday, 28 October
Partly cloudy. High 48°, low 35°.
Pressure29.91 inHg
Wind9.6 mph S
Humidity60%
Visibility—
Dew point30°
Thu, 2955° / 39°0
55 °
Hartley, Thursday, 29 October
Partly cloudy. High 55°, low 39°.
Pressure30.00 inHg
Wind16.8 mph NW
Humidity37%
Visibility—
Dew point26°
Fri, 3057° / 40°0
57 °
Hartley, Friday, 30 October
Mostly clear. High 57°, low 40°.
Pressure29.97 inHg
Wind11.3 mph SE
Humidity34%
Visibility—
Dew point26°
Sat, 3154° / 45°0
54 °
Hartley, Saturday, 31 October
Partly cloudy. High 54°, low 45°.
Pressure30.03 inHg
Wind17.6 mph NW
Humidity22%
Visibility—
Dew point15°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0153° / 35°0.02
53 °
Hartley, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high53°
Average low35°
Average precipitation0.02 in
Chance of precipitation12%
Record high73° (1978)
Record low6° (2002)
Mon, 0253° / 34°0.02
53 °
Hartley, Monday, 2 November
Climate normal for this date — 60-year average.
Average high53°
Average low34°
Average precipitation0.02 in
Chance of precipitation13%
Record high76° (2022)
Record low1° (1991)
Tue, 0352° / 35°0.03
52 °
Hartley, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low35°
Average precipitation0.03 in
Chance of precipitation20%
Record high71° (2020)
Record low0° (1991)
Wed, 0454° / 33°0.01
54 °
Hartley, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high54°
Average low33°
Average precipitation0.01 in
Chance of precipitation12%
Record high81° (1978)
Record low4° (1991)
Thu, 0553° / 33°0.03
53 °
Hartley, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low33°
Average precipitation0.03 in
Chance of precipitation17%
Record high74° (1975)
Record low7° (2003)
Fri, 0652° / 32°0.03
52 °
Hartley, Friday, 6 November
Climate normal for this date — 60-year average.
Average high52°
Average low32°
Average precipitation0.03 in
Chance of precipitation12%
Record high76° (2020)
Record low4° (2003)
Sat, 0752° / 32°0.03
52 °
Hartley, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high52°
Average low32°
Average precipitation0.03 in
Chance of precipitation10%
Record high74° (1999)
Record low-2° (1991)
Sun, 0850° / 32°0.06
50 °
Hartley, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high50°
Average low32°
Average precipitation0.06 in
Chance of precipitation17%
Record high80° (1999)
Record low11° (1991)
Mon, 0947° / 30°0.04
47 °
Hartley, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.04 in
Chance of precipitation22%
Record high70° (2016)
Record low0° (1966)
Tue, 1047° / 28°0.04
47 °
Hartley, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.04 in
Chance of precipitation20%
Record high71° (1989)
Record low-5° (1986)
Wed, 1145° / 27°0.01
45 °
Hartley, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high45°
Average low27°
Average precipitation0.01 in
Chance of precipitation12%
Record high70° (2005)
Record low-13° (1986)
Thu, 1247° / 28°0.02
47 °
Hartley, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.02 in
Chance of precipitation12%
Record high72° (1999)
Record low-9° (1986)
Fri, 1348° / 29°0.03
48 °
Hartley, Friday, 13 November
Climate normal for this date — 60-year average.
Average high48°
Average low29°
Average precipitation0.03 in
Chance of precipitation17%
Record high73° (1990)
Record low-20° (1986)
Sat, 1447° / 30°0.02
47 °
Hartley, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.02 in
Chance of precipitation10%
Record high72° (1990)
Record low0° (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 Hartley, 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 Hartley, 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.