Weather in Island Mountain, CA
Island Mountain, Sunday, 9 August, 02:30
Clear. Feels like 60°. High 95°, low 58°.
Monthly outlook for Island Mountain, CA: average high 89.8°, average low 56.3°. That is 1.6° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 1 days and 0.2 inches. The warmest day looks like 11 August (102°), the coolest 22 August (49.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 90.3° | 88.1° | +1.2° |
| 19 August – 28 August | 89.1° | 85.4° | +2° |
| 29 August – 7 September | at normal | 85.6° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Alderpoint (11 mi).
0
Island Mountain, Monday, 10 August
Clear. High 96°, low 54°.
0Island Mountain, Tuesday, 11 August
Clear. High 102°, low 63°.
0Island Mountain, Wednesday, 12 August
Clear. High 99°, low 62°.
0Island Mountain, Thursday, 13 August
Clear. High 90°, low 58°.
0Island Mountain, Friday, 14 August
Clear. High 91°, low 57°.
0Island Mountain, Saturday, 15 August
Clear. High 92°, low 58°.
0
Island Mountain, Sunday, 16 August
Partly cloudy. High 86°, low 55°.
0
Island Mountain, Monday, 17 August
Overcast. High 77°, low 50°.
0.04
Island Mountain, Tuesday, 18 August
Light rain. High 73°, low 53°.
0
Island Mountain, Wednesday, 19 August
Mostly clear. High 87°, low 59°.
0Island Mountain, Thursday, 20 August
Mostly clear. High 85°, low 55°.
0Island Mountain, Friday, 21 August
Clear. High 88°, low 53°.
0Island Mountain, Saturday, 22 August
Overcast. High 88°, low 49°.
0Island Mountain, Sunday, 23 August
Clear. High 94°, low 55°.
0Island Mountain, Monday, 24 August
Overcast. High 93°, low 60°.
0.04Island Mountain, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.02Island Mountain, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.02Island Mountain, Thursday, 27 August
Climate normal for this date — 60-year average.
0.01Island Mountain, Friday, 28 August
Climate normal for this date — 60-year average.
0.02Island Mountain, Saturday, 29 August
Climate normal for this date — 60-year average.
0.07Island Mountain, Sunday, 30 August
Climate normal for this date — 60-year average.
0.04Island Mountain, Monday, 31 August
Climate normal for this date — 60-year average.
0.01Island Mountain, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.01Island Mountain, Wednesday, 2 September
Climate normal for this date — 60-year average.
0Island Mountain, Thursday, 3 September
Climate normal for this date — 60-year average.
0Island Mountain, Friday, 4 September
Climate normal for this date — 60-year average.
0.01Island Mountain, Saturday, 5 September
Climate normal for this date — 60-year average.
0Island Mountain, Sunday, 6 September
Climate normal for this date — 60-year average.
0.01Island Mountain, 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 Island Mountain, CA 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 Island Mountain, CA 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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