Weather in Lyon Valley, PA
Lyon Valley, Saturday, 8 August, 23:24
Overcast. Feels like 75°. High 85°, low 70°.
Monthly outlook for Lyon Valley, PA: average high 79.6°, average low 62.1°. That is 1° below the climate normal for August. Precipitation is expected on 6 days (about 1.6 inches), against a normal of 6 days and 2.1 inches. The warmest day looks like 11 August (89.2°), the coolest 22 August (52.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 82.1° | 82.1° | +0° |
| 18 August – 27 August | 75.3° | 80.5° | -2.9° |
| 28 August – 6 September | at normal | 79.3° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Stiles (9 mi).
0
Lyon Valley, Sunday, 9 August
Light rain. High 86°, low 71°.
0.01Lyon Valley, Monday, 10 August
Light rain. High 87°, low 71°.
0.02Lyon Valley, Tuesday, 11 August
Light rain. High 89°, low 69°.
0.11Lyon Valley, Wednesday, 12 August
Light rain. High 84°, low 69°.
0.02Lyon Valley, Thursday, 13 August
Light rain. High 81°, low 60°.
0
Lyon Valley, Friday, 14 August
Clear. High 77°, low 55°.
0Lyon Valley, Saturday, 15 August
Clear. High 79°, low 55°.
0Lyon Valley, Sunday, 16 August
Overcast. High 80°, low 54°.
0.07Lyon Valley, Monday, 17 August
Light rain. High 74°, low 57°.
0.15Lyon Valley, Tuesday, 18 August
Light rain. High 67°, low 64°.
0.06Lyon Valley, Wednesday, 19 August
Light rain. High 75°, low 64°.
1.06Lyon Valley, Thursday, 20 August
Heavy rain. High 77°, low 65°.
0Lyon Valley, Friday, 21 August
Clear. High 76°, low 56°.
0Lyon Valley, Saturday, 22 August
Clear. High 78°, low 52°.
0.04Lyon Valley, Sunday, 23 August
Light rain. High 80°, low 59°.
0.07
Lyon Valley, Monday, 24 August
Climate normal for this date — 60-year average.
0.07Lyon Valley, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.06Lyon Valley, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.19
Lyon Valley, Thursday, 27 August
Climate normal for this date — 60-year average.
0.19Lyon Valley, Friday, 28 August
Climate normal for this date — 60-year average.
0.14Lyon Valley, Saturday, 29 August
Climate normal for this date — 60-year average.
0.05Lyon Valley, Sunday, 30 August
Climate normal for this date — 60-year average.
0.06Lyon Valley, Monday, 31 August
Climate normal for this date — 60-year average.
0.15Lyon Valley, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.12Lyon Valley, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.14Lyon Valley, Thursday, 3 September
Climate normal for this date — 60-year average.
0.13Lyon Valley, Friday, 4 September
Climate normal for this date — 60-year average.
0.07Lyon Valley, Saturday, 5 September
Climate normal for this date — 60-year average.
0.23Lyon Valley, 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 Lyon Valley, PA 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 Lyon Valley, PA 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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