Weather in Rosslyn Farms, PA
Rosslyn Farms, Sunday, 9 August, 10:12
Clear. Feels like 78°. High 86°, low 68°.
Monthly outlook for Rosslyn Farms, PA: average high 77.7°, average low 60.1°. That is 0.9° below the climate normal for August. Precipitation is expected on 6 days (about 3.0 inches), against a normal of 6 days and 2.1 inches. The warmest day looks like 9 August (86.2°), the coolest 21 August (53.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 78.7° | 79.8° | -0.6° |
| 19 August – 28 August | 76.2° | 79.2° | -1.7° |
| 29 August – 7 September | at normal | 77.7° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Mount Lebanon (4 mi).
1.29
Rosslyn Farms, Monday, 10 August
Heavy rain. High 86°, low 67°.
0.5Rosslyn Farms, Tuesday, 11 August
Heavy rain. High 82°, low 65°.
0.43Rosslyn Farms, Wednesday, 12 August
Rain. High 79°, low 65°.
0
Rosslyn Farms, Thursday, 13 August
Partly cloudy. High 78°, low 64°.
0
Rosslyn Farms, Friday, 14 August
Overcast. High 76°, low 59°.
0Rosslyn Farms, Saturday, 15 August
Overcast. High 73°, low 54°.
0.05Rosslyn Farms, Sunday, 16 August
Light rain. High 73°, low 54°.
0Rosslyn Farms, Monday, 17 August
Overcast. High 74°, low 62°.
0Rosslyn Farms, Tuesday, 18 August
Overcast. High 79°, low 57°.
0.09Rosslyn Farms, Wednesday, 19 August
Light rain. High 81°, low 62°.
0Rosslyn Farms, Thursday, 20 August
Overcast. High 71°, low 59°.
0Rosslyn Farms, Friday, 21 August
Overcast. High 76°, low 54°.
0.56Rosslyn Farms, Saturday, 22 August
Rain. High 84°, low 59°.
0.02Rosslyn Farms, Sunday, 23 August
Light rain. High 71°, low 59°.
0Rosslyn Farms, Monday, 24 August
Clear. High 74°, low 54°.
0.09Rosslyn Farms, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.09Rosslyn Farms, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.13
Rosslyn Farms, Thursday, 27 August
Climate normal for this date — 60-year average.
0.19Rosslyn Farms, Friday, 28 August
Climate normal for this date — 60-year average.
0.13Rosslyn Farms, Saturday, 29 August
Climate normal for this date — 60-year average.
0.14Rosslyn Farms, Sunday, 30 August
Climate normal for this date — 60-year average.
0.16Rosslyn Farms, Monday, 31 August
Climate normal for this date — 60-year average.
0.1Rosslyn Farms, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.13Rosslyn Farms, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.1Rosslyn Farms, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09Rosslyn Farms, Friday, 4 September
Climate normal for this date — 60-year average.
0.11Rosslyn Farms, Saturday, 5 September
Climate normal for this date — 60-year average.
0.14Rosslyn Farms, Sunday, 6 September
Climate normal for this date — 60-year average.
0.11Rosslyn Farms, 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 Rosslyn Farms, 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 Rosslyn Farms, 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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