Weather in Grand Island, CA
Grand Island, Sunday, 9 August, 10:09
Clear. Feels like 86°. High 102°, low 65°.
Monthly outlook for Grand Island, CA: average high 105.4°, average low 68.3°. That is 6.7° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 0 days and 0.1 inches. The warmest day looks like 23 August (119.7°), the coolest 13 August (58.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 98.8° | 94.2° | +2.5° |
| 19 August – 28 August | 116.3° | 92.2° | +13.4° |
| 29 August – 7 September | at normal | 92.7° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Yuba City (13 mi).
0Grand Island, Monday, 10 August
Clear. High 98°, low 66°.
0Grand Island, Tuesday, 11 August
Clear. High 107°, low 62°.
0Grand Island, Wednesday, 12 August
Clear. High 104°, low 64°.
0
Grand Island, Thursday, 13 August
Overcast. High 93°, low 59°.
0Grand Island, Friday, 14 August
Clear. High 95°, low 60°.
0Grand Island, Saturday, 15 August
Clear. High 97°, low 61°.
0Grand Island, Sunday, 16 August
Overcast. High 85°, low 67°.
0Grand Island, Monday, 17 August
Overcast. High 101°, low 65°.
0Grand Island, Tuesday, 18 August
Clear. High 107°, low 68°.
0
Grand Island, Wednesday, 19 August
Partly cloudy. High 112°, low 71°.
0Grand Island, Thursday, 20 August
Overcast. High 114°, low 73°.
0Grand Island, Friday, 21 August
Clear. High 116°, low 76°.
0Grand Island, Saturday, 22 August
Partly cloudy. High 118°, low 77°.
0
Grand Island, Sunday, 23 August
Mostly clear. High 120°, low 80°.
0Grand Island, Monday, 24 August
Clear. High 119°, low 80°.
0Grand Island, Tuesday, 25 August
Climate normal for this date — 60-year average.
0Grand Island, Wednesday, 26 August
Climate normal for this date — 60-year average.
0Grand Island, Thursday, 27 August
Climate normal for this date — 60-year average.
0Grand Island, Friday, 28 August
Climate normal for this date — 60-year average.
0Grand Island, Saturday, 29 August
Climate normal for this date — 60-year average.
0Grand Island, Sunday, 30 August
Climate normal for this date — 60-year average.
0Grand Island, Monday, 31 August
Climate normal for this date — 60-year average.
0Grand Island, Tuesday, 1 September
Climate normal for this date — 60-year average.
0Grand Island, Wednesday, 2 September
Climate normal for this date — 60-year average.
0Grand Island, Thursday, 3 September
Climate normal for this date — 60-year average.
0Grand Island, Friday, 4 September
Climate normal for this date — 60-year average.
0Grand Island, Saturday, 5 September
Climate normal for this date — 60-year average.
0Grand Island, Sunday, 6 September
Climate normal for this date — 60-year average.
0Grand 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 Grand Island, 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 Grand Island, 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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