Weather in Helena Valley Northwest, MT
Helena Valley Northwest, Sunday, 9 August, 11:25
Mostly clear. Feels like 80°. High 89°, low 53°.
Monthly outlook for Helena Valley Northwest, MT: average high 89.9°, average low 56.9°. That is 5.4° above the climate normal for August. Precipitation is expected on 2 days (about 0.3 inches), against a normal of 5 days and 0.9 inches. The warmest day looks like 24 August (101.4°), the coolest 15 August (50.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 85.2° | 80.9° | +2.4° |
| 19 August – 28 August | 97.8° | 78.9° | +10.5° |
| 29 August – 7 September | at normal | 76.2° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Helena (9 mi).
0
Helena Valley Northwest, Monday, 10 August
Clear. High 89°, low 53°.
0Helena Valley Northwest, Tuesday, 11 August
Clear. High 92°, low 55°.
0.02
Helena Valley Northwest, Wednesday, 12 August
Light rain. High 85°, low 55°.
0.03Helena Valley Northwest, Thursday, 13 August
Light rain. High 64°, low 53°.
0.12Helena Valley Northwest, Friday, 14 August
Light rain. High 75°, low 55°.
0.12Helena Valley Northwest, Saturday, 15 August
Rain. High 87°, low 50°.
0.01Helena Valley Northwest, Sunday, 16 August
Light rain. High 91°, low 56°.
0
Helena Valley Northwest, Monday, 17 August
Overcast. High 89°, low 64°.
0Helena Valley Northwest, Tuesday, 18 August
Clear. High 90°, low 58°.
0Helena Valley Northwest, Wednesday, 19 August
Clear. High 93°, low 56°.
0Helena Valley Northwest, Thursday, 20 August
Overcast. High 97°, low 60°.
0Helena Valley Northwest, Friday, 21 August
Clear. High 95°, low 60°.
0.01Helena Valley Northwest, Saturday, 22 August
Light rain. High 100°, low 58°.
0Helena Valley Northwest, Sunday, 23 August
Clear. High 100°, low 61°.
0Helena Valley Northwest, Monday, 24 August
Clear. High 101°, low 63°.
0.03
Helena Valley Northwest, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.03Helena Valley Northwest, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.04Helena Valley Northwest, Thursday, 27 August
Climate normal for this date — 60-year average.
0.07Helena Valley Northwest, Friday, 28 August
Climate normal for this date — 60-year average.
0.04Helena Valley Northwest, Saturday, 29 August
Climate normal for this date — 60-year average.
0.06Helena Valley Northwest, Sunday, 30 August
Climate normal for this date — 60-year average.
0.06Helena Valley Northwest, Monday, 31 August
Climate normal for this date — 60-year average.
0.06Helena Valley Northwest, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.04Helena Valley Northwest, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.02Helena Valley Northwest, Thursday, 3 September
Climate normal for this date — 60-year average.
0.05Helena Valley Northwest, Friday, 4 September
Climate normal for this date — 60-year average.
0.06Helena Valley Northwest, Saturday, 5 September
Climate normal for this date — 60-year average.
0.05Helena Valley Northwest, Sunday, 6 September
Climate normal for this date — 60-year average.
0.07Helena Valley Northwest, Monday, 7 September
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 Helena Valley Northwest, 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 Helena Valley Northwest, 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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