Weather in Gretna, PA
Gretna, Thursday, 22 October, 05:27
Clear. Feels like 36°. High 64°, low 37°.
Monthly outlook for Gretna, PA: average high 60.1°, average low 43.8°. That is 1.5° above the climate normal for October. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 31 October (70.5°), the coolest 5 November (34.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 22 October – 31 October | 64.3° | 58.3° | +3.3° |
| 1 November – 10 November | 53.2° | 55° | -1° |
| 11 November – 20 November | at normal | 49.5° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — East Finley (14 mi).
0
Gretna, Friday, 23 October
Mostly clear. High 63°, low 39°.
0
Gretna, Saturday, 24 October
Clear. High 61°, low 39°.
0Gretna, Sunday, 25 October
Clear. High 62°, low 38°.
0
Gretna, Monday, 26 October
Partly cloudy. High 64°, low 41°.
0Gretna, Tuesday, 27 October
Clear. High 61°, low 48°.
0.01
Gretna, Wednesday, 28 October
Light rain. High 66°, low 46°.
0Gretna, Thursday, 29 October
Light rain. High 65°, low 53°.
0
Gretna, Friday, 30 October
Overcast. High 66°, low 49°.
0Gretna, Saturday, 31 October
Overcast. High 71°, low 52°.
0.11Gretna, Sunday, 1 November
Light rain. High 60°, low 55°.
0.07Gretna, Monday, 2 November
Light rain. High 55°, low 45°.
0Gretna, Tuesday, 3 November
Overcast. High 57°, low 42°.
0Gretna, Wednesday, 4 November
Overcast. High 53°, low 40°.
0Gretna, Thursday, 5 November
Overcast. High 48°, low 35°.
0.18Gretna, Friday, 6 November
Light rain. High 47°, low 43°.
0.13
Gretna, Saturday, 7 November
Climate normal for this date — 60-year average.
0.11Gretna, Sunday, 8 November
Climate normal for this date — 60-year average.
0.11Gretna, Monday, 9 November
Climate normal for this date — 60-year average.
0.15Gretna, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.15Gretna, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.14Gretna, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06Gretna, Friday, 13 November
Climate normal for this date — 60-year average.
0.1Gretna, Saturday, 14 November
Climate normal for this date — 60-year average.
0.15Gretna, Sunday, 15 November
Climate normal for this date — 60-year average.
0.14Gretna, Monday, 16 November
Climate normal for this date — 60-year average.
0.13Gretna, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.07Gretna, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.14Gretna, Thursday, 19 November
Climate normal for this date — 60-year average.
0.1Gretna, Friday, 20 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 Gretna, 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 Gretna, 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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