As of 19:49 MDT

Weather in Trojan, SD

57°

Trojan, Saturday, 10 October, 19:49

Overcast. Feels like 54°. High 76°, low 52°.

Pressure29.62 inHg

Wind6.9 mph W

Humidity35%

Visibility6.2 mi

Dew point30°

See detailed hourly forecast

Monthly outlook for Trojan, SD: average high 57.9°, average low 38.2°. That is 1.1° above the climate normal for October. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 4 days and 1.0 inches. The warmest day looks like 10 October (75.9°), the coolest 17 October (21.6°).

57.9°/38.2°

Average high / low

+1.1°

Above normal

3 / 4

Wet days / normal

0.5 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
10 October – 19 October	56.9°	56.5°	+0.2°
20 October – 29 October	59.6°	53.8°	+3.2°
30 October – 8 November	at normal	47.9°	—

October records over 66 years

86.9°4 October 1963All-time high

-5.4°30 October 1991All-time low

Climate normals and records are computed from the nearest reference point — Mountain Plains (9 mi).

Sun, 1154° / 41°

0.03

54 °

Trojan, Sunday, 11 October

Light rain. High 54°, low 41°.

Pressure29.77 inHg

Wind5 mph NE

Humidity64%

Visibility6.2 mi

Dew point43°

Mon, 1252° / 34°

0.03

52 °

Trojan, Monday, 12 October

Light rain. High 52°, low 34°.

Pressure29.91 inHg

Wind10.1 mph NW

Humidity92%

Visibility6.2 mi

Dew point41°

Tue, 1344° / 34°

0.2

44 °

Trojan, Tuesday, 13 October

Rain. High 44°, low 34°.

Pressure30.03 inHg

Wind3.7 mph NE

Humidity97%

Visibility3.8 mi

Dew point39°

Wed, 1451° / 35°

0.08

51 °

Trojan, Wednesday, 14 October

Light rain. High 51°, low 35°.

Pressure30.24 inHg

Wind5.1 mph NE

Humidity55%

Visibility6.2 mi

Dew point34°

Thu, 1553° / 40°

0.07

53 °

Trojan, Thursday, 15 October

Light rain. High 53°, low 40°.

Pressure30.39 inHg

Wind8.3 mph N

Humidity59%

Visibility—

Dew point37°

Fri, 1651° / 22°

51 °

Trojan, Friday, 16 October

Overcast. High 51°, low 22°.

Pressure30.56 inHg

Wind9.5 mph NE

Humidity33%

Visibility—

Dew point20°

Sat, 1757° / 22°

57 °

Trojan, Saturday, 17 October

Clear. High 57°, low 22°.

Pressure30.18 inHg

Wind9.8 mph SW

Humidity18%

Visibility—

Dew point9°

Sun, 1863° / 43°

63 °

Trojan, Sunday, 18 October

Partly cloudy. High 63°, low 43°.

Pressure30.06 inHg

Wind11.4 mph W

Humidity23%

Visibility—

Dew point21°

Mon, 1968° / 46°

68 °

Trojan, Monday, 19 October

Clear. High 68°, low 46°.

Pressure30.03 inHg

Wind7.1 mph S

Humidity16%

Visibility—

Dew point18°

Tue, 2065° / 47°

65 °

Trojan, Tuesday, 20 October

Clear. High 65°, low 47°.

Pressure29.85 inHg

Wind10.2 mph W

Humidity18%

Visibility—

Dew point19°

Wed, 2153° / 37°

53 °

Trojan, Wednesday, 21 October

Mostly clear. High 53°, low 37°.

Pressure30.15 inHg

Wind11.4 mph NW

Humidity29%

Visibility—

Dew point17°

Thu, 2258° / 36°

58 °

Trojan, Thursday, 22 October

Overcast. High 58°, low 36°.

Pressure30.12 inHg

Wind7.4 mph N

Humidity30%

Visibility—

Dew point23°

Fri, 2359° / 40°

59 °

Trojan, Friday, 23 October

Mostly clear. High 59°, low 40°.

Pressure30.18 inHg

Wind6.4 mph S

Humidity25%

Visibility—

Dew point21°

Sat, 2461° / 41°

61 °

Trojan, Saturday, 24 October

Clear. High 61°, low 41°.

Pressure30.03 inHg

Wind6.9 mph SW

Humidity29%

Visibility—

Dew point26°

Sun, 2562° / 41°

62 °

Trojan, Sunday, 25 October

Mostly clear. High 62°, low 41°.

Pressure29.91 inHg

Wind10.5 mph NW

Humidity21%

Visibility—

Dew point19°

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

Mon, 2654° / 35°

0.07

54 °

Trojan, Monday, 26 October

Climate normal for this date — 60-year average.

Average high54°

Average low35°

Average precipitation0.07 in

Chance of precipitation22%

Record high72° (1960)

Record low-3° (2020)

Tue, 2752° / 33°

0.05

52 °

Trojan, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high52°

Average low33°

Average precipitation0.05 in

Chance of precipitation27%

Record high75° (2016)

Record low14° (2023)

Wed, 2852° / 34°

0.06

52 °

Trojan, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high52°

Average low34°

Average precipitation0.06 in

Chance of precipitation22%

Record high74° (2016)

Record low7° (1991)

Thu, 2950° / 33°

0.11

50 °

Trojan, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high50°

Average low33°

Average precipitation0.11 in

Chance of precipitation37%

Record high76° (1968)

Record low-2° (1991)

Fri, 3048° / 31°

0.04

48 °

Trojan, Friday, 30 October

Climate normal for this date — 60-year average.

Average high48°

Average low31°

Average precipitation0.04 in

Chance of precipitation27%

Record high73° (1968)

Record low-5° (1991)

Sat, 3148° / 31°

0.05

48 °

Trojan, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high48°

Average low31°

Average precipitation0.05 in

Chance of precipitation23%

Record high71° (1999)

Record low1° (1991)

Sun, 0148° / 31°

0.08

48 °

Trojan, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high48°

Average low31°

Average precipitation0.08 in

Chance of precipitation25%

Record high70° (1965)

Record low0° (2002)

Mon, 0247° / 31°

0.05

47 °

Trojan, Monday, 2 November

Climate normal for this date — 60-year average.

Average high47°

Average low31°

Average precipitation0.05 in

Chance of precipitation25%

Record high73° (2008)

Record low-8° (1991)

Tue, 0347° / 31°

0.04

47 °

Trojan, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high47°

Average low31°

Average precipitation0.04 in

Chance of precipitation23%

Record high71° (2020)

Record low-1° (1991)

Wed, 0450° / 31°

0.02

50 °

Trojan, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high50°

Average low31°

Average precipitation0.02 in

Chance of precipitation17%

Record high71° (1978)

Record low8° (1967)

Thu, 0548° / 31°

0.04

48 °

Trojan, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high48°

Average low31°

Average precipitation0.04 in

Chance of precipitation25%

Record high72° (2020)

Record low3° (2003)

Fri, 0648° / 30°

0.06

48 °

Trojan, Friday, 6 November

Climate normal for this date — 60-year average.

Average high48°

Average low30°

Average precipitation0.06 in

Chance of precipitation18%

Record high70° (2020)

Record low7° (1991)

Sat, 0748° / 30°

0.04

48 °

Trojan, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high48°

Average low30°

Average precipitation0.04 in

Chance of precipitation17%

Record high73° (1999)

Record low5° (1991)

Sun, 0846° / 30°

0.06

46 °

Trojan, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high46°

Average low30°

Average precipitation0.06 in

Chance of precipitation22%

Record high74° (1999)

Record low7° (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 Trojan, 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 Trojan, 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.