As of 11:09 MDT

Weather in Eureka, MT

46°

Eureka, Monday, 19 October, 11:09

Overcast. Feels like 46°. High 61°, low 36°.

Pressure29.97 inHg

Wind1.5 mph N

Humidity71%

Visibility—

Dew point38°

See detailed hourly forecast

Monthly outlook for Eureka, MT: average high 56.3°, average low 36.7°. That is 4.7° above the climate normal for October. Precipitation is expected on 1 day (about 0.6 inches), against a normal of 6 days and 1.2 inches. The warmest day looks like 21 October (66.8°), the coolest 28 October (31°).

56.3°/36.7°

Average high / low

+4.7°

Above normal

1 / 6

Wet days / normal

0.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
19 October – 28 October	57.4°	50.1°	+4.1°
29 October – 7 November	54.5°	43.5°	+6.1°
8 November – 17 November	at normal	39.6°	—

October records over 66 years

84.2°2 October 1992All-time high

0.3°30 October 1991All-time low

Tue, 2065° / 39°

65 °

Eureka, Tuesday, 20 October

Mostly clear. High 65°, low 39°.

Pressure30.15 inHg

Wind2.1 mph NW

Humidity59%

Visibility1.2 mi

Dew point39°

Wed, 2167° / 43°

67 °

Eureka, Wednesday, 21 October

Clear. High 67°, low 43°.

Pressure30.00 inHg

Wind2 mph NE

Humidity53%

Visibility6.2 mi

Dew point39°

Thu, 2259° / 45°

0.03

59 °

Eureka, Thursday, 22 October

Light rain. High 59°, low 45°.

Pressure29.88 inHg

Wind2.6 mph NW

Humidity62%

Visibility—

Dew point42°

Fri, 2354° / 46°

0.54

54 °

Eureka, Friday, 23 October

Rain. High 54°, low 46°.

Pressure29.85 inHg

Wind4.9 mph NE

Humidity85%

Visibility—

Dew point49°

Sat, 2452° / 39°

0.03

52 °

Eureka, Saturday, 24 October

Light rain. High 52°, low 39°.

Pressure30.21 inHg

Wind5.4 mph SE

Humidity59%

Visibility—

Dew point33°

Sun, 2555° / 37°

55 °

Eureka, Sunday, 25 October

Overcast. High 55°, low 37°.

Pressure30.24 inHg

Wind3.8 mph S

Humidity34%

Visibility—

Dew point20°

Mon, 2652° / 34°

52 °

Eureka, Monday, 26 October

Mostly clear. High 52°, low 34°.

Pressure30.33 inHg

Wind4.4 mph NW

Humidity47%

Visibility—

Dew point26°

Tue, 2754° / 31°

54 °

Eureka, Tuesday, 27 October

Mostly clear. High 54°, low 31°.

Pressure30.39 inHg

Wind3.4 mph N

Humidity49%

Visibility—

Dew point26°

Wed, 2855° / 31°

55 °

Eureka, Wednesday, 28 October

Clear. High 55°, low 31°.

Pressure30.27 inHg

Wind3.1 mph NE

Humidity42%

Visibility—

Dew point23°

Thu, 2955° / 32°

55 °

Eureka, Thursday, 29 October

Clear. High 55°, low 32°.

Pressure30.06 inHg

Wind1.5 mph NE

Humidity39%

Visibility—

Dew point22°

Fri, 3055° / 33°

55 °

Eureka, Friday, 30 October

Mostly clear. High 55°, low 33°.

Pressure29.88 inHg

Wind2.1 mph N

Humidity42%

Visibility—

Dew point24°

Sat, 3153° / 33°

53 °

Eureka, Saturday, 31 October

Partly cloudy. High 53°, low 33°.

Pressure30.00 inHg

Wind1.4 mph SE

Humidity48%

Visibility—

Dew point27°

Sun, 0156° / 34°

56 °

Eureka, Sunday, 1 November

Clear. High 56°, low 34°.

Pressure30.09 inHg

Wind2 mph NE

Humidity47%

Visibility—

Dew point27°

Mon, 0256° / 37°

56 °

Eureka, Monday, 2 November

Overcast. High 56°, low 37°.

Pressure30.06 inHg

Wind1.9 mph S

Humidity53%

Visibility—

Dew point31°

Tue, 0351° / 36°

51 °

Eureka, Tuesday, 3 November

Partly cloudy. High 51°, low 36°.

Pressure30.24 inHg

Wind2.1 mph N

Humidity65%

Visibility—

Dew point35°

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

Wed, 0443° / 33°

0.11

43 °

Eureka, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high43°

Average low33°

Average precipitation0.11 in

Chance of precipitation47%

Record high62° (1975)

Record low9° (2017)

Thu, 0543° / 31°

0.07

43 °

Eureka, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high43°

Average low31°

Average precipitation0.07 in

Chance of precipitation43%

Record high62° (1975)

Record low8° (1967)

Fri, 0642° / 30°

0.1

42 °

Eureka, Friday, 6 November

Climate normal for this date — 60-year average.

Average high42°

Average low30°

Average precipitation0.1 in

Chance of precipitation47%

Record high56° (2010)

Record low7° (1971)

Sat, 0741° / 29°

0.09

41 °

Eureka, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high41°

Average low29°

Average precipitation0.09 in

Chance of precipitation48%

Record high55° (1999)

Record low6° (2017)

Sun, 0841° / 29°

0.07

41 °

Eureka, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high41°

Average low29°

Average precipitation0.07 in

Chance of precipitation40%

Record high56° (2016)

Record low0° (2022)

Mon, 0941° / 29°

0.08

41 °

Eureka, Monday, 9 November

Climate normal for this date — 60-year average.

Average high41°

Average low29°

Average precipitation0.08 in

Chance of precipitation42%

Record high59° (2016)

Record low1° (1986)

Tue, 1039° / 28°

0.07

39 °

Eureka, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high39°

Average low28°

Average precipitation0.07 in

Chance of precipitation40%

Record high57° (2016)

Record low-4° (1986)

Wed, 1140° / 27°

0.07

40 °

Eureka, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high40°

Average low27°

Average precipitation0.07 in

Chance of precipitation42%

Record high55° (2016)

Record low-7° (1985)

Thu, 1240° / 29°

0.09

40 °

Eureka, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high40°

Average low29°

Average precipitation0.09 in

Chance of precipitation40%

Record high56° (2016)

Record low-5° (1986)

Fri, 1340° / 29°

0.07

40 °

Eureka, Friday, 13 November

Climate normal for this date — 60-year average.

Average high40°

Average low29°

Average precipitation0.07 in

Chance of precipitation45%

Record high59° (2025)

Record low9° (2014)

Sat, 1439° / 28°

0.1

39 °

Eureka, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high39°

Average low28°

Average precipitation0.1 in

Chance of precipitation43%

Record high60° (1999)

Record low6° (2014)

Sun, 1540° / 27°

0.06

40 °

Eureka, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high40°

Average low27°

Average precipitation0.06 in

Chance of precipitation32%

Record high57° (1999)

Record low8° (2014)

Mon, 1639° / 28°

0.1

39 °

Eureka, Monday, 16 November

Climate normal for this date — 60-year average.

Average high39°

Average low28°

Average precipitation0.1 in

Chance of precipitation50%

Record high55° (2025)

Record low7° (1961)

Tue, 1738° / 28°

0.11

38 °

Eureka, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high38°

Average low28°

Average precipitation0.11 in

Chance of precipitation58%

Record high52° (2020)

Record low7° (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 Eureka, MT 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 Eureka, MT 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.