As of 01:36 CDT

Weather in Chester, SD

46°

Chester, Tuesday, 20 October, 01:36

Clear. Feels like 42°. High 70°, low 44°.

Pressure30.24 inHg

Wind7.9 mph SE

Humidity83%

Visibility6.2 mi

Dew point41°

See detailed hourly forecast

Monthly outlook for Chester, SD: average high 59.4°, average low 42.7°. That is 4° above the climate normal for October. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 3 days and 0.9 inches. The warmest day looks like 22 October (71.3°), the coolest 28 October (23.2°).

59.4°/42.7°

Average high / low

+4°

Above normal

3 / 3

Wet days / normal

0.7 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
20 October – 29 October	57.8°	54.2°	+2°
30 October – 8 November	62.1°	48.4°	+7.6°
9 November – 18 November	at normal	42.2°	—

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).

Wed, 2168° / 45°

68 °

Chester, Wednesday, 21 October

Clear. High 68°, low 45°.

Pressure30.18 inHg

Wind2 mph E

Humidity71%

Visibility6.2 mi

Dew point53°

Thu, 2271° / 51°

71 °

Chester, Thursday, 22 October

Clear. High 71°, low 51°.

Pressure30.18 inHg

Wind9.1 mph SE

Humidity72%

Visibility6.2 mi

Dew point56°

Fri, 2365° / 57°

0.41

65 °

Chester, Friday, 23 October

Rain. High 65°, low 57°.

Pressure30.03 inHg

Wind17.3 mph SE

Humidity77%

Visibility6.2 mi

Dew point53°

Sat, 2468° / 53°

0.2

68 °

Chester, Saturday, 24 October

Light rain. High 68°, low 53°.

Pressure30.06 inHg

Wind17.4 mph S

Humidity58%

Visibility—

Dew point51°

Sun, 2554° / 43°

0.12

54 °

Chester, Sunday, 25 October

Light rain. High 54°, low 43°.

Pressure30.42 inHg

Wind14.1 mph N

Humidity64%

Visibility—

Dew point38°

Mon, 2644° / 40°

44 °

Chester, Monday, 26 October

Overcast. High 44°, low 40°.

Pressure30.39 inHg

Wind9.5 mph NE

Humidity36%

Visibility—

Dew point19°

Tue, 2739° / 28°

39 °

Chester, Tuesday, 27 October

Clear. High 39°, low 28°.

Pressure30.65 inHg

Wind15.5 mph NW

Humidity27%

Visibility—

Dew point5°

Wed, 2845° / 23°

45 °

Chester, Wednesday, 28 October

Clear. High 45°, low 23°.

Pressure30.50 inHg

Wind9.3 mph SW

Humidity21%

Visibility—

Dew point2°

Thu, 2954° / 32°

54 °

Chester, Thursday, 29 October

Clear. High 54°, low 32°.

Pressure30.12 inHg

Wind7.5 mph SW

Humidity39%

Visibility—

Dew point25°

Fri, 3059° / 37°

59 °

Chester, Friday, 30 October

Mostly clear. High 59°, low 37°.

Pressure29.91 inHg

Wind7.3 mph S

Humidity53%

Visibility—

Dew point37°

Sat, 3164° / 43°

64 °

Chester, Saturday, 31 October

Partly cloudy. High 64°, low 43°.

Pressure29.94 inHg

Wind8 mph SE

Humidity60%

Visibility—

Dew point44°

Sun, 0163° / 51°

63 °

Chester, Sunday, 1 November

Overcast. High 63°, low 51°.

Pressure29.91 inHg

Wind10.2 mph NE

Humidity70%

Visibility—

Dew point50°

Mon, 0265° / 47°

65 °

Chester, Monday, 2 November

Clear. High 65°, low 47°.

Pressure30.03 inHg

Wind12.3 mph NW

Humidity46%

Visibility—

Dew point40°

Tue, 0361° / 42°

61 °

Chester, Tuesday, 3 November

Clear. High 61°, low 42°.

Pressure30.06 inHg

Wind6.9 mph SE

Humidity31%

Visibility—

Dew point26°

Wed, 0459° / 46°

59 °

Chester, Wednesday, 4 November

Overcast. High 59°, low 46°.

Pressure29.88 inHg

Wind15.1 mph S

Humidity46%

Visibility—

Dew point37°

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

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)

Mon, 1643° / 27°

0.06

43 °

Chester, Monday, 16 November

Climate normal for this date — 60-year average.

Average high43°

Average low27°

Average precipitation0.06 in

Chance of precipitation20%

Record high68° (2001)

Record low-3° (2014)

Tue, 1741° / 27°

0.05

41 °

Chester, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high41°

Average low27°

Average precipitation0.05 in

Chance of precipitation18%

Record high64° (2001)

Record low3° (2014)

Wed, 1841° / 27°

0.06

41 °

Chester, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high41°

Average low27°

Average precipitation0.06 in

Chance of precipitation25%

Record high65° (1999)

Record low-1° (1996)

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.