Weather in Grand Junction, IA
Grand Junction, Saturday, 8 August, 22:41
Overcast. Feels like 72°. High 80°, low 59°.
Monthly outlook for Grand Junction, IA: average high 83.7°, average low 62.7°. That is 1.5° above the climate normal for August. Precipitation is expected on 4 days (about 0.4 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 18 August (97.4°), the coolest 21 August (50.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 82.6° | 81° | +0.9° |
| 18 August – 27 August | 85.6° | 81.2° | +2.4° |
| 28 August – 6 September | at normal | 80° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Jefferson (7 mi).
0
Grand Junction, Sunday, 9 August
Clear. High 93°, low 71°.
0Grand Junction, Monday, 10 August
Overcast. High 90°, low 73°.
0
Grand Junction, Tuesday, 11 August
Mostly clear. High 93°, low 69°.
0.06
Grand Junction, Wednesday, 12 August
Light rain. High 88°, low 69°.
0.13Grand Junction, Thursday, 13 August
Light rain. High 69°, low 61°.
0Grand Junction, Friday, 14 August
Overcast. High 80°, low 59°.
0.14Grand Junction, Saturday, 15 August
Light rain. High 68°, low 59°.
0Grand Junction, Sunday, 16 August
Overcast. High 77°, low 60°.
0Grand Junction, Monday, 17 August
Clear. High 88°, low 66°.
0Grand Junction, Tuesday, 18 August
Light rain. High 97°, low 69°.
0.02Grand Junction, Wednesday, 19 August
Light rain. High 84°, low 62°.
0.06Grand Junction, Thursday, 20 August
Light rain. High 68°, low 54°.
0Grand Junction, Friday, 21 August
Overcast. High 77°, low 51°.
0.01Grand Junction, Saturday, 22 August
Light rain. High 94°, low 59°.
0Grand Junction, Sunday, 23 August
Clear. High 93°, low 64°.
0.08
Grand Junction, Monday, 24 August
Climate normal for this date — 60-year average.
0.13Grand Junction, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.16
Grand Junction, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.12Grand Junction, Thursday, 27 August
Climate normal for this date — 60-year average.
0.23Grand Junction, Friday, 28 August
Climate normal for this date — 60-year average.
0.13Grand Junction, Saturday, 29 August
Climate normal for this date — 60-year average.
0.07Grand Junction, Sunday, 30 August
Climate normal for this date — 60-year average.
0.09Grand Junction, Monday, 31 August
Climate normal for this date — 60-year average.
0.08Grand Junction, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.13Grand Junction, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.08Grand Junction, Thursday, 3 September
Climate normal for this date — 60-year average.
0.1Grand Junction, Friday, 4 September
Climate normal for this date — 60-year average.
0.09Grand Junction, Saturday, 5 September
Climate normal for this date — 60-year average.
0.06Grand Junction, Sunday, 6 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 Junction, IA 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 Junction, IA 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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