Weather in Arroyo Grande, CA
Arroyo Grande, Sunday, 9 August, 05:52
Mostly clear. Feels like 59°. High 78°, low 59°.
Monthly outlook for Arroyo Grande, CA: average high 75.1°, average low 60.5°. That is 1.4° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 0 days and 0.0 inches. The warmest day looks like 19 August (83.3°), the coolest 14 August (57.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 73.7° | 72.4° | +0.7° |
| 19 August – 28 August | 77.4° | 73.1° | +2.4° |
| 29 August – 7 September | at normal | 74.5° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Grover Beach (2 mi).
0
Arroyo Grande, Monday, 10 August
Partly cloudy. High 78°, low 63°.
0
Arroyo Grande, Tuesday, 11 August
Mostly clear. High 76°, low 63°.
0
Arroyo Grande, Wednesday, 12 August
Overcast. High 70°, low 59°.
0
Arroyo Grande, Thursday, 13 August
Clear. High 69°, low 58°.
0Arroyo Grande, Friday, 14 August
Clear. High 70°, low 57°.
0Arroyo Grande, Saturday, 15 August
Clear. High 71°, low 58°.
0Arroyo Grande, Sunday, 16 August
Overcast. High 73°, low 62°.
0Arroyo Grande, Monday, 17 August
Partly cloudy. High 74°, low 61°.
0Arroyo Grande, Tuesday, 18 August
Overcast. High 78°, low 62°.
0Arroyo Grande, Wednesday, 19 August
Overcast. High 83°, low 64°.
0Arroyo Grande, Thursday, 20 August
Overcast. High 81°, low 65°.
0Arroyo Grande, Friday, 21 August
Partly cloudy. High 80°, low 64°.
0Arroyo Grande, Saturday, 22 August
Overcast. High 81°, low 59°.
0Arroyo Grande, Sunday, 23 August
Mostly clear. High 70°, low 58°.
0Arroyo Grande, Monday, 24 August
Clear. High 69°, low 57°.
0Arroyo Grande, Tuesday, 25 August
Climate normal for this date — 60-year average.
0Arroyo Grande, Wednesday, 26 August
Climate normal for this date — 60-year average.
0Arroyo Grande, Thursday, 27 August
Climate normal for this date — 60-year average.
0Arroyo Grande, Friday, 28 August
Climate normal for this date — 60-year average.
0Arroyo Grande, Saturday, 29 August
Climate normal for this date — 60-year average.
0Arroyo Grande, Sunday, 30 August
Climate normal for this date — 60-year average.
0Arroyo Grande, Monday, 31 August
Climate normal for this date — 60-year average.
0Arroyo Grande, Tuesday, 1 September
Climate normal for this date — 60-year average.
0Arroyo Grande, Wednesday, 2 September
Climate normal for this date — 60-year average.
0Arroyo Grande, Thursday, 3 September
Climate normal for this date — 60-year average.
0.02Arroyo Grande, Friday, 4 September
Climate normal for this date — 60-year average.
0.01Arroyo Grande, Saturday, 5 September
Climate normal for this date — 60-year average.
0Arroyo Grande, Sunday, 6 September
Climate normal for this date — 60-year average.
0Arroyo Grande, 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 Arroyo Grande, 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 Arroyo Grande, 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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