Weather in Eureka, MT
Eureka, Sunday, 18 October, 11:26
Clear. Feels like 47°. High 59°, low 34°.
Monthly outlook for Eureka, MT: average high 47.8°, average low 32.8°. That is 0.4° below the climate normal for October. Precipitation is expected on 6 days (about 1.8 inches), against a normal of 6 days and 1.2 inches. The warmest day looks like 21 October (65°), the coolest 30 October (11.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 53.5° | 50.8° | +1.5° |
| 28 October – 6 November | 38.2° | 44° | -3.2° |
| 7 November – 16 November | at normal | 40° | — |
October records over 66 years
0
Eureka, Monday, 19 October
Overcast. High 63°, low 31°.
0Eureka, Tuesday, 20 October
Overcast. High 62°, low 41°.
0
Eureka, Wednesday, 21 October
Mostly clear. High 65°, low 43°.
0.03
Eureka, Thursday, 22 October
Light rain. High 58°, low 46°.
0.27Eureka, Friday, 23 October
Light rain. High 50°, low 40°.
0Eureka, Saturday, 24 October
Overcast. High 50°, low 34°.
0.15
Eureka, Sunday, 25 October
Snow. High 43°, low 39°.
0.05Eureka, Monday, 26 October
Snow. High 45°, low 35°.
0.35Eureka, Tuesday, 27 October
Snow. High 40°, low 35°.
0.03Eureka, Wednesday, 28 October
Snow. High 42°, low 34°.
0.43Eureka, Thursday, 29 October
Snow. High 37°, low 20°.
0Eureka, Friday, 30 October
Overcast. High 35°, low 11°.
0Eureka, Saturday, 31 October
Overcast. High 37°, low 21°.
0Eureka, Sunday, 1 November
Light snow. High 39°, low 25°.
0.53Eureka, Monday, 2 November
Snow. High 40°, low 33°.
0.06
Eureka, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.11
Eureka, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.07Eureka, Thursday, 5 November
Climate normal for this date — 60-year average.
0.1Eureka, Friday, 6 November
Climate normal for this date — 60-year average.
0.09Eureka, Saturday, 7 November
Climate normal for this date — 60-year average.
0.07Eureka, Sunday, 8 November
Climate normal for this date — 60-year average.
0.08Eureka, Monday, 9 November
Climate normal for this date — 60-year average.
0.07Eureka, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.07Eureka, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.09Eureka, Thursday, 12 November
Climate normal for this date — 60-year average.
0.07Eureka, Friday, 13 November
Climate normal for this date — 60-year average.
0.1Eureka, Saturday, 14 November
Climate normal for this date — 60-year average.
0.06Eureka, Sunday, 15 November
Climate normal for this date — 60-year average.
0.1Eureka, Monday, 16 November
Climate normal for this date — 60-year average.
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.
Sun and moon today
Weather history
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