As of 21:00 MDT

Weather in Sulphur, SD

50°

Sulphur, Friday, 30 October, 21:00

Overcast. Feels like 46°. High 58°, low 37°.

Pressure30.03 inHg

Wind11 mph SE

Humidity83%

Visibility6.2 mi

Dew point45°

See detailed hourly forecast

Monthly outlook for Sulphur, SD: average high 56.3°, average low 43.3°. That is 4.5° above the climate normal for October. Precipitation is expected on 4 days (about 0.4 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 31 October (66.3°), the coolest 30 October (36.6°).

56.3°/43.3°

Average high / low

+4.5°

Above normal

4 / 2

Wet days / normal

0.4 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
30 October – 8 November	57.1°	50.2°	+3.8°
9 November – 18 November	55.1°	44.8°	+5.7°
19 November – 28 November	at normal	39.6°	—

October records over 66 years

93.4°3 October 2025All-time high

-7.1°26 October 2020All-time low

Sat, 3166° / 48°

66 °

Sulphur, Saturday, 31 October

Overcast. High 66°, low 48°.

Pressure29.97 inHg

Wind12.6 mph SE

Humidity91%

Visibility6.2 mi

Dew point53°

Sun, 0163° / 45°

0.04

63 °

Sulphur, Sunday, 1 November

Light rain. High 63°, low 45°.

Pressure29.91 inHg

Wind5.2 mph SE

Humidity76%

Visibility6.2 mi

Dew point48°

Mon, 0255° / 45°

0.13

55 °

Sulphur, Monday, 2 November

Light rain. High 55°, low 45°.

Pressure29.71 inHg

Wind22.5 mph NW

Humidity82%

Visibility6.2 mi

Dew point50°

Tue, 0349° / 44°

0.11

49 °

Sulphur, Tuesday, 3 November

Light rain. High 49°, low 44°.

Pressure30.09 inHg

Wind17.7 mph NW

Humidity79%

Visibility6.2 mi

Dew point42°

Wed, 0451° / 44°

51 °

Sulphur, Wednesday, 4 November

Overcast. High 51°, low 44°.

Pressure29.97 inHg

Wind8.8 mph N

Humidity70%

Visibility—

Dew point39°

Thu, 0557° / 43°

57 °

Sulphur, Thursday, 5 November

Overcast. High 57°, low 43°.

Pressure29.97 inHg

Wind8.9 mph S

Humidity45%

Visibility—

Dew point31°

Fri, 0659° / 44°

59 °

Sulphur, Friday, 6 November

Overcast. High 59°, low 44°.

Pressure29.77 inHg

Wind9.3 mph S

Humidity37%

Visibility—

Dew point28°

Sat, 0757° / 42°

57 °

Sulphur, Saturday, 7 November

Overcast. High 57°, low 42°.

Pressure30.06 inHg

Wind17.2 mph N

Humidity49%

Visibility—

Dew point34°

Sun, 0856° / 39°

56 °

Sulphur, Sunday, 8 November

Clear. High 56°, low 39°.

Pressure30.30 inHg

Wind7.6 mph NW

Humidity40%

Visibility—

Dew point26°

Mon, 0951° / 44°

0.07

51 °

Sulphur, Monday, 9 November

Light rain. High 51°, low 44°.

Pressure30.12 inHg

Wind7.6 mph NE

Humidity86%

Visibility—

Dew point46°

Tue, 1056° / 49°

0.01

56 °

Sulphur, Tuesday, 10 November

Light rain. High 56°, low 49°.

Pressure29.83 inHg

Wind6.4 mph SW

Humidity78%

Visibility—

Dew point46°

Wed, 1161° / 46°

61 °

Sulphur, Wednesday, 11 November

Overcast. High 61°, low 46°.

Pressure29.71 inHg

Wind14 mph SE

Humidity57%

Visibility—

Dew point40°

Thu, 1259° / 44°

59 °

Sulphur, Thursday, 12 November

Clear. High 59°, low 44°.

Pressure29.65 inHg

Wind17.7 mph NW

Humidity35%

Visibility—

Dew point27°

Fri, 1352° / 40°

52 °

Sulphur, Friday, 13 November

Overcast. High 52°, low 40°.

Pressure29.97 inHg

Wind22 mph NW

Humidity38%

Visibility—

Dew point25°

Sat, 1451° / 37°

51 °

Sulphur, Saturday, 14 November

Clear. High 51°, low 37°.

Pressure29.80 inHg

Wind11.7 mph E

Humidity39%

Visibility—

Dew point23°

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

Sun, 1545° / 27°

0.01

45 °

Sulphur, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high45°

Average low27°

Average precipitation0.01 in

Chance of precipitation7%

Record high66° (2001)

Record low0° (1978)

Mon, 1646° / 27°

0.01

46 °

Sulphur, Monday, 16 November

Climate normal for this date — 60-year average.

Average high46°

Average low27°

Average precipitation0.01 in

Chance of precipitation7%

Record high67° (1979)

Record low3° (1978)

Tue, 1744° / 27°

0.02

44 °

Sulphur, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high44°

Average low27°

Average precipitation0.02 in

Chance of precipitation13%

Record high64° (1976)

Record low-4° (2000)

Wed, 1844° / 26°

0.03

44 °

Sulphur, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high44°

Average low26°

Average precipitation0.03 in

Chance of precipitation13%

Record high67° (2020)

Record low2° (1996)

Thu, 1942° / 27°

0.02

42 °

Sulphur, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high42°

Average low27°

Average precipitation0.02 in

Chance of precipitation17%

Record high67° (2003)

Record low2° (1985)

Fri, 2042° / 25°

0.02

42 °

Sulphur, Friday, 20 November

Climate normal for this date — 60-year average.

Average high42°

Average low25°

Average precipitation0.02 in

Chance of precipitation12%

Record high66° (1990)

Record low-7° (1985)

Sat, 2142° / 24°

0.02

42 °

Sulphur, Saturday, 21 November

Climate normal for this date — 60-year average.

Average high42°

Average low24°

Average precipitation0.02 in

Chance of precipitation12%

Record high65° (2012)

Record low-12° (1977)

Sun, 2242° / 24°

0.02

42 °

Sulphur, Sunday, 22 November

Climate normal for this date — 60-year average.

Average high42°

Average low24°

Average precipitation0.02 in

Chance of precipitation13%

Record high63° (2002)

Record low-7° (1985)

Mon, 2340° / 24°

0.02

40 °

Sulphur, Monday, 23 November

Climate normal for this date — 60-year average.

Average high40°

Average low24°

Average precipitation0.02 in

Chance of precipitation13%

Record high69° (2017)

Record low-13° (1985)

Tue, 2441° / 24°

0.01

41 °

Sulphur, Tuesday, 24 November

Climate normal for this date — 60-year average.

Average high41°

Average low24°

Average precipitation0.01 in

Chance of precipitation5%

Record high66° (1990)

Record low-15° (1996)

Wed, 2538° / 23°

0.04

38 °

Sulphur, Wednesday, 25 November

Climate normal for this date — 60-year average.

Average high38°

Average low23°

Average precipitation0.04 in

Chance of precipitation22%

Record high70° (1960)

Record low-3° (1993)

Thu, 2636° / 22°

0.04

36 °

Sulphur, Thursday, 26 November

Climate normal for this date — 60-year average.

Average high36°

Average low22°

Average precipitation0.04 in

Chance of precipitation23%

Record high64° (1963)

Record low-14° (1985)

Fri, 2735° / 21°

0.02

35 °

Sulphur, Friday, 27 November

Climate normal for this date — 60-year average.

Average high35°

Average low21°

Average precipitation0.02 in

Chance of precipitation12%

Record high64° (2017)

Record low-19° (1985)

Sat, 2836° / 21°

0.01

36 °

Sulphur, Saturday, 28 November

Climate normal for this date — 60-year average.

Average high36°

Average low21°

Average precipitation0.01 in

Chance of precipitation13%

Record high58° (2002)

Record low-10° (1985)

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 Sulphur, 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 Sulphur, 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.