Weather in Upper Macungie, PA
Upper Macungie, Sunday, 9 August, 08:41
Partly cloudy. Feels like 78°. High 84°, low 71°.
Monthly outlook for Upper Macungie, PA: average high 83.5°, average low 63.3°. That is 1.3° above the climate normal for August. Precipitation is expected on 3 days (about 1.4 inches), against a normal of 6 days and 2.1 inches. The warmest day looks like 23 August (93.4°), the coolest 15 August (51.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 80.4° | 81.9° | -0.8° |
| 19 August – 28 August | 88.6° | 80.5° | +4.5° |
| 29 August – 7 September | at normal | 79° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Stiles (9 mi).
0
Upper Macungie, Monday, 10 August
Light rain. High 84°, low 69°.
0.87Upper Macungie, Tuesday, 11 August
Heavy rain. High 86°, low 68°.
0.03Upper Macungie, Wednesday, 12 August
Light rain. High 82°, low 67°.
0.01Upper Macungie, Thursday, 13 August
Light rain. High 80°, low 62°.
0
Upper Macungie, Friday, 14 August
Clear. High 74°, low 53°.
0Upper Macungie, Saturday, 15 August
Clear. High 76°, low 52°.
0
Upper Macungie, Sunday, 16 August
Overcast. High 77°, low 52°.
0Upper Macungie, Monday, 17 August
Partly cloudy. High 80°, low 58°.
0
Upper Macungie, Tuesday, 18 August
Mostly clear. High 83°, low 61°.
0Upper Macungie, Wednesday, 19 August
Clear. High 85°, low 63°.
0Upper Macungie, Thursday, 20 August
Partly cloudy. High 86°, low 62°.
0.14Upper Macungie, Friday, 21 August
Rain. High 91°, low 66°.
0Upper Macungie, Saturday, 22 August
Light rain. High 89°, low 70°.
0Upper Macungie, Sunday, 23 August
Clear. High 93°, low 66°.
0.36Upper Macungie, Monday, 24 August
Rain. High 87°, low 73°.
0.07Upper Macungie, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.06Upper Macungie, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.19
Upper Macungie, Thursday, 27 August
Climate normal for this date — 60-year average.
0.19Upper Macungie, Friday, 28 August
Climate normal for this date — 60-year average.
0.14Upper Macungie, Saturday, 29 August
Climate normal for this date — 60-year average.
0.05Upper Macungie, Sunday, 30 August
Climate normal for this date — 60-year average.
0.06Upper Macungie, Monday, 31 August
Climate normal for this date — 60-year average.
0.15Upper Macungie, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.12Upper Macungie, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.14Upper Macungie, Thursday, 3 September
Climate normal for this date — 60-year average.
0.13Upper Macungie, Friday, 4 September
Climate normal for this date — 60-year average.
0.07Upper Macungie, Saturday, 5 September
Climate normal for this date — 60-year average.
0.23Upper Macungie, Sunday, 6 September
Climate normal for this date — 60-year average.
0.13Upper Macungie, 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 Upper Macungie, 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 Upper Macungie, 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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