As of 11:59 MDT

Weather in Hartley, SD

69°

Hartley, Saturday, 17 October, 11:59

Clear. Feels like 67°. High 73°, low 42°.

Pressure30.06 inHg

Wind1.6 mph W

Humidity35%

Visibility6.2 mi

Dew point40°

See detailed hourly forecast

Monthly outlook for Hartley, SD: average high 63.1°, average low 43°. That is 2.7° above the climate normal for October. Precipitation is expected on 2 days (about 1.4 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 23 October (79.9°), the coolest 31 October (29.9°).

63.1°/43°

Average high / low

+2.7°

Above normal

2 / 3

Wet days / normal

1.4 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
17 October – 26 October	68.6°	60.5°	+4.5°
27 October – 5 November	53.8°	53.9°	-0°
6 November – 15 November	at normal	48°	—

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).

Sun, 1870° / 42°

70 °

Hartley, Sunday, 18 October

Clear. High 70°, low 42°.

Pressure30.03 inHg

Wind11.2 mph N

Humidity36%

Visibility6.2 mi

Dew point39°

Mon, 1960° / 40°

60 °

Hartley, Monday, 19 October

Overcast. High 60°, low 40°.

Pressure30.18 inHg

Wind6 mph E

Humidity55%

Visibility6.2 mi

Dew point41°

Tue, 2072° / 46°

72 °

Hartley, Tuesday, 20 October

Clear. High 72°, low 46°.

Pressure30.00 inHg

Wind6.6 mph SE

Humidity51%

Visibility6.2 mi

Dew point48°

Wed, 2168° / 47°

68 °

Hartley, Wednesday, 21 October

Clear. High 68°, low 47°.

Pressure30.15 inHg

Wind6 mph SE

Humidity65%

Visibility—

Dew point49°

Thu, 2278° / 52°

78 °

Hartley, Thursday, 22 October

Overcast. High 78°, low 52°.

Pressure30.00 inHg

Wind17.1 mph SE

Humidity57%

Visibility—

Dew point51°

Fri, 2380° / 62°

0.04

80 °

Hartley, Friday, 23 October

Light rain. High 80°, low 62°.

Pressure29.53 inHg

Wind16.9 mph S

Humidity51%

Visibility—

Dew point53°

Sat, 2460° / 43°

0.04

60 °

Hartley, Saturday, 24 October

Light rain. High 60°, low 43°.

Pressure29.85 inHg

Wind27 mph NW

Humidity79%

Visibility—

Dew point39°

Sun, 2556° / 36°

56 °

Hartley, Sunday, 25 October

Overcast. High 56°, low 36°.

Pressure30.09 inHg

Wind20.8 mph SE

Humidity38%

Visibility—

Dew point24°

Mon, 2670° / 50°

70 °

Hartley, Monday, 26 October

Overcast. High 70°, low 50°.

Pressure29.62 inHg

Wind18.4 mph SE

Humidity49%

Visibility—

Dew point44°

Tue, 2771° / 47°

71 °

Hartley, Tuesday, 27 October

Overcast. High 71°, low 47°.

Pressure29.53 inHg

Wind20.6 mph SW

Humidity21%

Visibility—

Dew point22°

Wed, 2856° / 45°

56 °

Hartley, Wednesday, 28 October

Overcast. High 56°, low 45°.

Pressure29.94 inHg

Wind23.2 mph W

Humidity33%

Visibility—

Dew point24°

Thu, 2971° / 44°

71 °

Hartley, Thursday, 29 October

Clear. High 71°, low 44°.

Pressure29.62 inHg

Wind19.4 mph SW

Humidity17%

Visibility—

Dew point17°

Fri, 3050° / 32°

1.09

50 °

Hartley, Friday, 30 October

Snow. High 50°, low 32°.

Pressure29.29 inHg

Wind29.7 mph NW

Humidity90%

Visibility—

Dew point43°

Sat, 3136° / 30°

0.23

36 °

Hartley, Saturday, 31 October

Snow. High 36°, low 30°.

Pressure29.91 inHg

Wind36.3 mph NW

Humidity86%

Visibility—

Dew point29°

Sun, 0140° / 31°

40 °

Hartley, Sunday, 1 November

Clear. High 40°, low 31°.

Pressure29.94 inHg

Wind7.9 mph S

Humidity85%

Visibility—

Dew point33°

From day 17 onward the outlook is built from 60-year climate statistics

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)

Sun, 1546° / 28°

0.02

46 °

Hartley, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high46°

Average low28°

Average precipitation0.02 in

Chance of precipitation10%

Record high67° (2001)

Record low3° (1978)

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.