Weather in Gretna, SD
Gretna, Friday, 23 October, 02:26
Clear. Feels like 59°. High 74°, low 55°.
Monthly outlook for Gretna, SD: average high 50.6°, average low 38.4°. That is 0.8° above the climate normal for October. Precipitation is expected on 7 days (about 2.2 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 23 October (73.9°), the coolest 3 November (28.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 23 October – 1 November | 50.8° | 51° | -0.1° |
| 2 November – 11 November | 50.3° | 44.3° | +3.3° |
| 12 November – 21 November | at normal | 39° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Roscoe (9 mi).
0.01
Gretna, Saturday, 24 October
Light rain. High 62°, low 41°.
0.06Gretna, Sunday, 25 October
Light rain. High 50°, low 35°.
0.76Gretna, Monday, 26 October
Rain. High 43°, low 38°.
0.39Gretna, Tuesday, 27 October
Rain. High 49°, low 39°.
0.21Gretna, Wednesday, 28 October
Rain. High 47°, low 39°.
0
Gretna, Thursday, 29 October
Overcast. High 47°, low 38°.
0.31Gretna, Friday, 30 October
Rain. High 43°, low 38°.
0.37Gretna, Saturday, 31 October
Rain. High 45°, low 40°.
0
Gretna, Sunday, 1 November
Clear. High 49°, low 37°.
0.06
Gretna, Monday, 2 November
Snow. High 44°, low 35°.
0Gretna, Tuesday, 3 November
Clear. High 45°, low 29°.
0Gretna, Wednesday, 4 November
Overcast. High 47°, low 32°.
0Gretna, Thursday, 5 November
Overcast. High 62°, low 39°.
0Gretna, Friday, 6 November
Clear. High 59°, low 43°.
0Gretna, Saturday, 7 November
Overcast. High 45°, low 37°.
0.06
Gretna, Sunday, 8 November
Climate normal for this date — 60-year average.
0.04
Gretna, Monday, 9 November
Climate normal for this date — 60-year average.
0.06Gretna, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.02Gretna, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.04Gretna, Thursday, 12 November
Climate normal for this date — 60-year average.
0.03Gretna, Friday, 13 November
Climate normal for this date — 60-year average.
0.02Gretna, Saturday, 14 November
Climate normal for this date — 60-year average.
0.02Gretna, Sunday, 15 November
Climate normal for this date — 60-year average.
0.03Gretna, Monday, 16 November
Climate normal for this date — 60-year average.
0.02Gretna, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.04Gretna, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.04Gretna, Thursday, 19 November
Climate normal for this date — 60-year average.
0.02Gretna, Friday, 20 November
Climate normal for this date — 60-year average.
0.02Gretna, Saturday, 21 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, SD 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, SD 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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