As of 04:50 CDT

Weather in Chester, SD

61°

Chester, Sunday, 11 October, 04:50

Mostly clear. Feels like 60°. High 84°, low 60°.

Pressure29.68 inHg

Wind9.2 mph S

Humidity72%

Visibility6.2 mi

Dew point52°

See detailed hourly forecast

Monthly outlook for Chester, SD: average high 61.6°, average low 43.5°. That is 2.8° above the climate normal for October. Precipitation is expected on 1 day (about 0.3 inches), against a normal of 3 days and 1.0 inches. The warmest day looks like 11 October (84.4°), the coolest 17 October (24.1°).

61.6°/43.5°

Average high / low

+2.8°

Above normal

1 / 3

Wet days / normal

0.3 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
11 October – 20 October	61.8°	57.6°	+2.3°
21 October – 30 October	61.3°	53.5°	+4.3°
31 October – 9 November	at normal	47.8°	—

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).

Mon, 1273° / 53°

73 °

Chester, Monday, 12 October

Clear. High 73°, low 53°.

Pressure29.62 inHg

Wind2.8 mph NE

Humidity61%

Visibility6.2 mi

Dew point59°

Tue, 1358° / 50°

58 °

Chester, Tuesday, 13 October

Overcast. High 58°, low 50°.

Pressure30.00 inHg

Wind7.3 mph N

Humidity64%

Visibility6.2 mi

Dew point42°

Wed, 1459° / 44°

59 °

Chester, Wednesday, 14 October

Partly cloudy. High 59°, low 44°.

Pressure30.24 inHg

Wind7.8 mph NE

Humidity60%

Visibility6.2 mi

Dew point40°

Thu, 1554° / 48°

0.24

54 °

Chester, Thursday, 15 October

Rain. High 54°, low 48°.

Pressure30.27 inHg

Wind9.7 mph NW

Humidity91%

Visibility—

Dew point47°

Fri, 1654° / 39°

54 °

Chester, Friday, 16 October

Clear. High 54°, low 39°.

Pressure30.71 inHg

Wind16.7 mph N

Humidity53%

Visibility—

Dew point33°

Sat, 1742° / 24°

42 °

Chester, Saturday, 17 October

Mostly clear. High 42°, low 24°.

Pressure30.65 inHg

Wind13.8 mph N

Humidity26%

Visibility—

Dew point5°

Sun, 1855° / 32°

55 °

Chester, Sunday, 18 October

Overcast. High 55°, low 32°.

Pressure30.12 inHg

Wind21.6 mph S

Humidity33%

Visibility—

Dew point19°

Mon, 1969° / 43°

69 °

Chester, Monday, 19 October

Clear. High 69°, low 43°.

Pressure30.00 inHg

Wind9.3 mph S

Humidity36%

Visibility—

Dew point35°

Tue, 2069° / 47°

69 °

Chester, Tuesday, 20 October

Mostly clear. High 69°, low 47°.

Pressure29.80 inHg

Wind16.6 mph S

Humidity36%

Visibility—

Dew point35°

Wed, 2166° / 51°

66 °

Chester, Wednesday, 21 October

Overcast. High 66°, low 51°.

Pressure30.09 inHg

Wind11.6 mph NW

Humidity35%

Visibility—

Dew point34°

Thu, 2261° / 41°

61 °

Chester, Thursday, 22 October

Clear. High 61°, low 41°.

Pressure30.36 inHg

Wind13.1 mph SE

Humidity41%

Visibility—

Dew point32°

Fri, 2371° / 48°

0.01

71 °

Chester, Friday, 23 October

Light rain. High 71°, low 48°.

Pressure29.77 inHg

Wind24.1 mph W

Humidity56%

Visibility—

Dew point53°

Sat, 2455° / 43°

55 °

Chester, Saturday, 24 October

Overcast. High 55°, low 43°.

Pressure30.30 inHg

Wind19.9 mph NW

Humidity39%

Visibility—

Dew point29°

Sun, 2558° / 36°

58 °

Chester, Sunday, 25 October

Partly cloudy. High 58°, low 36°.

Pressure30.33 inHg

Wind13.9 mph W

Humidity38%

Visibility—

Dew point26°

Mon, 2656° / 38°

56 °

Chester, Monday, 26 October

Partly cloudy. High 56°, low 38°.

Pressure30.27 inHg

Wind7.8 mph N

Humidity46%

Visibility—

Dew point31°

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

Tue, 2753° / 37°

0.09

53 °

Chester, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high53°

Average low37°

Average precipitation0.09 in

Chance of precipitation27%

Record high73° (1999)

Record low10° (2020)

Wed, 2852° / 36°

0.03

52 °

Chester, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high52°

Average low36°

Average precipitation0.03 in

Chance of precipitation15%

Record high73° (2024)

Record low21° (1967)

Thu, 2952° / 36°

0.06

52 °

Chester, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high52°

Average low36°

Average precipitation0.06 in

Chance of precipitation23%

Record high68° (2004)

Record low19° (1991)

Fri, 3050° / 36°

0.13

50 °

Chester, Friday, 30 October

Climate normal for this date — 60-year average.

Average high50°

Average low36°

Average precipitation0.13 in

Chance of precipitation32%

Record high69° (1965)

Record low17° (1991)

Sat, 3150° / 34°

0.08

50 °

Chester, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high50°

Average low34°

Average precipitation0.08 in

Chance of precipitation23%

Record high71° (1990)

Record low14° (2002)

Sun, 0149° / 35°

0.07

49 °

Chester, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high49°

Average low35°

Average precipitation0.07 in

Chance of precipitation15%

Record high70° (1990)

Record low15° (2002)

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)

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.