Weather in Chatham, PA
Chatham, Monday, 19 October, 23:37
Clear. Feels like 34°. High 64°, low 31°.
Monthly outlook for Chatham, PA: average high 54.5°, average low 34.2°. That is 0.2° below the climate normal for October. Precipitation is expected on 3 days (about 0.8 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 25 October (65.2°), the coolest 29 October (23°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 19 October – 28 October | 56.6° | 55.7° | +0.5° |
| 29 October – 7 November | 51° | 52.3° | -0.7° |
| 8 November – 17 November | at normal | 47° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Nelson (11 mi).
0
Chatham, Tuesday, 20 October
Clear. High 62°, low 36°.
0Chatham, Wednesday, 21 October
Clear. High 59°, low 28°.
0
Chatham, Thursday, 22 October
Light rain. High 57°, low 37°.
0
Chatham, Friday, 23 October
Overcast. High 48°, low 33°.
0
Chatham, Saturday, 24 October
Partly cloudy. High 56°, low 32°.
0Chatham, Sunday, 25 October
Clear. High 65°, low 35°.
0Chatham, Monday, 26 October
Overcast. High 60°, low 47°.
0.18Chatham, Tuesday, 27 October
Light rain. High 54°, low 44°.
0.12
Chatham, Wednesday, 28 October
Snow. High 41°, low 27°.
0Chatham, Thursday, 29 October
Light snow. High 41°, low 23°.
0Chatham, Friday, 30 October
Overcast. High 47°, low 27°.
0Chatham, Saturday, 31 October
Partly cloudy. High 53°, low 29°.
0Chatham, Sunday, 1 November
Overcast. High 54°, low 34°.
0.03Chatham, Monday, 2 November
Light rain. High 58°, low 40°.
0.42Chatham, Tuesday, 3 November
Light rain. High 53°, low 45°.
0.1Chatham, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.08
Chatham, Thursday, 5 November
Climate normal for this date — 60-year average.
0.08Chatham, Friday, 6 November
Climate normal for this date — 60-year average.
0.08Chatham, Saturday, 7 November
Climate normal for this date — 60-year average.
0.11Chatham, Sunday, 8 November
Climate normal for this date — 60-year average.
0.09Chatham, Monday, 9 November
Climate normal for this date — 60-year average.
0.12Chatham, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.12Chatham, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.15Chatham, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06Chatham, Friday, 13 November
Climate normal for this date — 60-year average.
0.11Chatham, Saturday, 14 November
Climate normal for this date — 60-year average.
0.12Chatham, Sunday, 15 November
Climate normal for this date — 60-year average.
0.13Chatham, Monday, 16 November
Climate normal for this date — 60-year average.
0.11Chatham, Tuesday, 17 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 Chatham, 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 Chatham, 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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