Weather in McHenry, PA
McHenry, Sunday, 11 October, 06:44
Light rain. Feels like 49°. High 57°, low 51°.
Monthly outlook for McHenry, PA: average high 57.2°, average low 41.8°. That is 0.9° above the climate normal for October. Precipitation is expected on 2 days (about 1.7 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 13 October (81.1°), the coolest 19 October (27.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 October – 20 October | 59.2° | 56.6° | +1.5° |
| 21 October – 30 October | 53.9° | 53° | +0.5° |
| 31 October – 9 November | at normal | 49.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Cummings (8 mi).
0
McHenry, Monday, 12 October
Overcast. High 69°, low 48°.
0McHenry, Tuesday, 13 October
Overcast. High 81°, low 58°.
0.03McHenry, Wednesday, 14 October
Light rain. High 77°, low 62°.
0McHenry, Thursday, 15 October
Overcast. High 61°, low 49°.
0.61McHenry, Friday, 16 October
Rain. High 56°, low 49°.
0.02
McHenry, Saturday, 17 October
Snow. High 49°, low 35°.
0
McHenry, Sunday, 18 October
Partly cloudy. High 38°, low 30°.
0
McHenry, Monday, 19 October
Mostly clear. High 48°, low 27°.
0McHenry, Tuesday, 20 October
Partly cloudy. High 55°, low 31°.
0
McHenry, Wednesday, 21 October
Clear. High 59°, low 36°.
0McHenry, Thursday, 22 October
Overcast. High 59°, low 39°.
0McHenry, Friday, 23 October
Overcast. High 58°, low 40°.
0.03McHenry, Saturday, 24 October
Light rain. High 58°, low 37°.
0McHenry, Sunday, 25 October
Overcast. High 49°, low 41°.
0.03McHenry, Monday, 26 October
Snow. High 39°, low 35°.
0.15McHenry, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.09
McHenry, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.17McHenry, Thursday, 29 October
Climate normal for this date — 60-year average.
0.12McHenry, Friday, 30 October
Climate normal for this date — 60-year average.
0.1McHenry, Saturday, 31 October
Climate normal for this date — 60-year average.
0.09McHenry, Sunday, 1 November
Climate normal for this date — 60-year average.
0.14McHenry, Monday, 2 November
Climate normal for this date — 60-year average.
0.07McHenry, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.09McHenry, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.1McHenry, Thursday, 5 November
Climate normal for this date — 60-year average.
0.07McHenry, Friday, 6 November
Climate normal for this date — 60-year average.
0.09McHenry, Saturday, 7 November
Climate normal for this date — 60-year average.
0.13McHenry, Sunday, 8 November
Climate normal for this date — 60-year average.
0.11McHenry, Monday, 9 November
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 McHenry, 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 McHenry, 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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