Weather in Mountain Island, NC
Mountain Island, Sunday, 9 August, 01:09
Partly cloudy. Feels like 73°. High 90°, low 72°.
Monthly outlook for Mountain Island, NC: average high 91.1°, average low 69.6°. That is 2.9° above the climate normal for August. Precipitation is expected on 8 days (about 1.3 inches), against a normal of 7 days and 2.1 inches. The warmest day looks like 24 August (99.3°), the coolest 21 August (64°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 89.4° | 86° | +1.9° |
| 19 August – 28 August | 94° | 85.7° | +4.6° |
| 29 August – 7 September | at normal | 83.9° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Gastonia (12 mi).
0.02
Mountain Island, Monday, 10 August
Light rain. High 97°, low 71°.
0
Mountain Island, Tuesday, 11 August
Clear. High 98°, low 70°.
0.05Mountain Island, Wednesday, 12 August
Light rain. High 98°, low 73°.
0.06Mountain Island, Thursday, 13 August
Light rain. High 95°, low 70°.
0.01Mountain Island, Friday, 14 August
Light rain. High 80°, low 71°.
0.04Mountain Island, Saturday, 15 August
Light rain. High 75°, low 68°.
0
Mountain Island, Sunday, 16 August
Overcast. High 84°, low 67°.
0.66Mountain Island, Monday, 17 August
Heavy rain. High 87°, low 68°.
0.21Mountain Island, Tuesday, 18 August
Rain. High 90°, low 69°.
0.13Mountain Island, Wednesday, 19 August
Light rain. High 93°, low 71°.
0Mountain Island, Thursday, 20 August
Clear. High 96°, low 72°.
0Mountain Island, Friday, 21 August
Overcast. High 89°, low 64°.
0
Mountain Island, Saturday, 22 August
Partly cloudy. High 91°, low 66°.
0.03Mountain Island, Sunday, 23 August
Light rain. High 97°, low 71°.
0.09Mountain Island, Monday, 24 August
Light rain. High 99°, low 71°.
0.09Mountain Island, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.15
Mountain Island, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.13Mountain Island, Thursday, 27 August
Climate normal for this date — 60-year average.
0.08Mountain Island, Friday, 28 August
Climate normal for this date — 60-year average.
0.07Mountain Island, Saturday, 29 August
Climate normal for this date — 60-year average.
0.09Mountain Island, Sunday, 30 August
Climate normal for this date — 60-year average.
0.13Mountain Island, Monday, 31 August
Climate normal for this date — 60-year average.
0.11Mountain Island, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.1Mountain Island, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.14Mountain Island, Thursday, 3 September
Climate normal for this date — 60-year average.
0.11Mountain Island, Friday, 4 September
Climate normal for this date — 60-year average.
0.22Mountain Island, Saturday, 5 September
Climate normal for this date — 60-year average.
0.12Mountain Island, Sunday, 6 September
Climate normal for this date — 60-year average.
0.11Mountain Island, 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 Mountain Island, NC 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 Mountain Island, NC 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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