As of 08:47 CDT

Weather in Chester, SD

37°

Chester, Saturday, 17 October, 08:47

Clear. Feels like 29°. High 58°, low 33°.

Pressure30.39 inHg

Wind12.2 mph S

Humidity77%

Visibility6.2 mi

Dew point31°

See detailed hourly forecast

Monthly outlook for Chester, SD: average high 61.9°, average low 44.3°. That is 4.5° above the climate normal for October. Precipitation is expected on 5 days (about 1.2 inches), against a normal of 3 days and 1.0 inches. The warmest day looks like 23 October (74.5°), the coolest 17 October (33.4°).

61.9°/44.3°

Average high / low

+4.5°

Above normal

5 / 3

Wet days / normal

1.2 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
17 October – 26 October	64.8°	55.5°	+5.1°
27 October – 5 November	57.1°	49.8°	+4°
6 November – 15 November	at normal	43.8°	—

October records over 66 years

89.2°3 October 2025All-time high

9.3°26 October 2020All-time low

Climate normals and records are computed from the nearest reference point — Rustic Acres Colony (9 mi).

Sun, 1863° / 43°

63 °

Chester, Sunday, 18 October

Clear. High 63°, low 43°.

Pressure30.09 inHg

Wind12.2 mph S

Humidity52%

Visibility6.2 mi

Dew point39°

Mon, 1959° / 42°

59 °

Chester, Monday, 19 October

Overcast. High 59°, low 42°.

Pressure30.24 inHg

Wind7.7 mph SE

Humidity68%

Visibility6.2 mi

Dew point44°

Tue, 2065° / 47°

65 °

Chester, Tuesday, 20 October

Clear. High 65°, low 47°.

Pressure30.18 inHg

Wind11.2 mph S

Humidity70%

Visibility6.2 mi

Dew point49°

Wed, 2168° / 50°

68 °

Chester, Wednesday, 21 October

Clear. High 68°, low 50°.

Pressure30.12 inHg

Wind8.9 mph S

Humidity67%

Visibility—

Dew point51°

Thu, 2270° / 49°

70 °

Chester, Thursday, 22 October

Mostly clear. High 70°, low 49°.

Pressure30.15 inHg

Wind10.1 mph SE

Humidity66%

Visibility—

Dew point53°

Fri, 2374° / 57°

0.02

74 °

Chester, Friday, 23 October

Light rain. High 74°, low 57°.

Pressure29.80 inHg

Wind24.3 mph S

Humidity73%

Visibility—

Dew point60°

Sat, 2469° / 48°

0.06

69 °

Chester, Saturday, 24 October

Light rain. High 69°, low 48°.

Pressure29.71 inHg

Wind22.7 mph S

Humidity42%

Visibility—

Dew point44°

Sun, 2558° / 46°

58 °

Chester, Sunday, 25 October

Overcast. High 58°, low 46°.

Pressure30.12 inHg

Wind17 mph W

Humidity51%

Visibility—

Dew point36°

Mon, 2663° / 43°

0.16

63 °

Chester, Monday, 26 October

Light rain. High 63°, low 43°.

Pressure29.91 inHg

Wind22.3 mph SE

Humidity54%

Visibility—

Dew point42°

Tue, 2767° / 51°

0.34

67 °

Chester, Tuesday, 27 October

Rain. High 67°, low 51°.

Pressure29.71 inHg

Wind15.6 mph SW

Humidity36%

Visibility—

Dew point35°

Wed, 2860° / 46°

60 °

Chester, Wednesday, 28 October

Overcast. High 60°, low 46°.

Pressure29.80 inHg

Wind18.4 mph W

Humidity33%

Visibility—

Dew point30°

Thu, 2957° / 41°

57 °

Chester, Thursday, 29 October

Overcast. High 57°, low 41°.

Pressure29.88 inHg

Wind19.7 mph S

Humidity32%

Visibility—

Dew point26°

Fri, 3058° / 44°

0.54

58 °

Chester, Friday, 30 October

Rain. High 58°, low 44°.

Pressure29.35 inHg

Wind22.5 mph SW

Humidity94%

Visibility—

Dew point50°

Sat, 3143° / 34°

0.04

43 °

Chester, Saturday, 31 October

Light snow. High 43°, low 34°.

Pressure29.71 inHg

Wind28.7 mph W

Humidity64%

Visibility—

Dew point29°

Sun, 0157° / 35°

57 °

Chester, Sunday, 1 November

Overcast. High 57°, low 35°.

Pressure30.00 inHg

Wind14.2 mph S

Humidity41%

Visibility—

Dew point27°

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

Mon, 0249° / 34°

0.04

49 °

Chester, Monday, 2 November

Climate normal for this date — 60-year average.

Average high49°

Average low34°

Average precipitation0.04 in

Chance of precipitation15%

Record high71° (2005)

Record low9° (1991)

Tue, 0348° / 34°

0.04

48 °

Chester, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high48°

Average low34°

Average precipitation0.04 in

Chance of precipitation18%

Record high71° (1978)

Record low6° (1991)

Wed, 0448° / 32°

0.01

48 °

Chester, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high48°

Average low32°

Average precipitation0.01 in

Chance of precipitation10%

Record high72° (2020)

Record low-12° (1991)

Thu, 0548° / 33°

0.04

48 °

Chester, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high48°

Average low33°

Average precipitation0.04 in

Chance of precipitation20%

Record high71° (2001)

Record low8° (1991)

Fri, 0647° / 32°

0.04

47 °

Chester, Friday, 6 November

Climate normal for this date — 60-year average.

Average high47°

Average low32°

Average precipitation0.04 in

Chance of precipitation18%

Record high74° (2020)

Record low-1° (1991)

Sat, 0747° / 31°

0.03

47 °

Chester, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high47°

Average low31°

Average precipitation0.03 in

Chance of precipitation12%

Record high71° (2020)

Record low-11° (1991)

Sun, 0847° / 31°

0.06

47 °

Chester, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high47°

Average low31°

Average precipitation0.06 in

Chance of precipitation15%

Record high74° (1999)

Record low2° (1991)

Mon, 0944° / 31°

0.15

44 °

Chester, Monday, 9 November

Climate normal for this date — 60-year average.

Average high44°

Average low31°

Average precipitation0.15 in

Chance of precipitation20%

Record high69° (1999)

Record low13° (2018)

Tue, 1042° / 28°

0.07

42 °

Chester, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high42°

Average low28°

Average precipitation0.07 in

Chance of precipitation22%

Record high64° (2016)

Record low4° (1986)

Wed, 1141° / 26°

0.04

41 °

Chester, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high41°

Average low26°

Average precipitation0.04 in

Chance of precipitation17%

Record high63° (2005)

Record low-3° (1986)

Thu, 1241° / 26°

0.06

41 °

Chester, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high41°

Average low26°

Average precipitation0.06 in

Chance of precipitation27%

Record high65° (2005)

Record low-2° (1966)

Fri, 1343° / 28°

0.03

43 °

Chester, Friday, 13 November

Climate normal for this date — 60-year average.

Average high43°

Average low28°

Average precipitation0.03 in

Chance of precipitation22%

Record high68° (1999)

Record low-12° (1986)

Sat, 1443° / 29°

0.02

43 °

Chester, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high43°

Average low29°

Average precipitation0.02 in

Chance of precipitation15%

Record high69° (2025)

Record low6° (2014)

Sun, 1543° / 28°

0.06

43 °

Chester, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high43°

Average low28°

Average precipitation0.06 in

Chance of precipitation18%

Record high64° (2001)

Record low6° (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 Chester, 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 Chester, 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.