West Derry, Friday, 23 October, 13:07
Clear. Feels like 59°. High 61°, low 38°.
West Derry, Saturday, 24 October
Clear. High 63°, low 36°.
West Derry, Sunday, 25 October
Clear. High 62°, low 34°.
West Derry, Monday, 26 October
Clear. High 63°, low 39°.
West Derry, Tuesday, 27 October
Overcast. High 60°, low 46°.
West Derry, Wednesday, 28 October
Overcast. High 65°, low 43°.
West Derry, Thursday, 29 October
Clear. High 68°, low 47°.
West Derry, Friday, 30 October
Partly cloudy. High 67°, low 50°.
West Derry, Saturday, 31 October
Light rain. High 62°, low 53°.
West Derry, Sunday, 1 November
Light rain. High 57°, low 55°.
West Derry, Monday, 2 November
Light rain. High 62°, low 55°.
West Derry, Tuesday, 3 November
Overcast. High 67°, low 54°.
West Derry, Wednesday, 4 November
Rain. High 59°, low 57°.
West Derry, Thursday, 5 November
Light rain. High 67°, low 58°.
West Derry, Friday, 6 November
Light rain. High 65°, low 55°.
West Derry, Saturday, 7 November
Overcast. High 64°, low 48°.
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 West Derry, PA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
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.
They are real temperature extremes recorded in West Derry, PA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.