Weather in Grenville, SD
Grenville, Friday, 9 October, 23:30
Mostly clear. Feels like 59°. High 73°, low 43°.
Monthly outlook for Grenville, SD: average high 55.5°, average low 41.8°. That is 0.4° above the climate normal for October. Precipitation is expected on 6 days (about 1.7 inches), against a normal of 4 days and 1.2 inches. The warmest day looks like 10 October (82.1°), the coolest 17 October (22°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 October – 18 October | 56.4° | 55.7° | +0.4° |
| 19 October – 28 October | 54° | 52.2° | +1° |
| 29 October – 7 November | at normal | 46.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Enemy Swim (6 mi).
0
Grenville, Saturday, 10 October
Clear. High 82°, low 59°.
0
Grenville, Sunday, 11 October
Overcast. High 64°, low 49°.
0.15
Grenville, Monday, 12 October
Rain. High 53°, low 47°.
0Grenville, Tuesday, 13 October
Overcast. High 51°, low 45°.
0Grenville, Wednesday, 14 October
Overcast. High 55°, low 47°.
0.09Grenville, Thursday, 15 October
Light rain. High 55°, low 44°.
0.47
Grenville, Friday, 16 October
Snow. High 46°, low 31°.
0.03Grenville, Saturday, 17 October
Light snow. High 34°, low 22°.
0Grenville, Sunday, 18 October
Overcast. High 52°, low 32°.
0Grenville, Monday, 19 October
Overcast. High 56°, low 37°.
0.3Grenville, Tuesday, 20 October
Rain. High 60°, low 48°.
0.04Grenville, Wednesday, 21 October
Light rain. High 58°, low 48°.
0Grenville, Thursday, 22 October
Clear. High 57°, low 41°.
0.58Grenville, Friday, 23 October
Rain. High 48°, low 42°.
0Grenville, Saturday, 24 October
Clear. High 46°, low 34°.
0.05
Grenville, Sunday, 25 October
Climate normal for this date — 60-year average.
0.04Grenville, Monday, 26 October
Climate normal for this date — 60-year average.
0.06
Grenville, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.02Grenville, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.07Grenville, Thursday, 29 October
Climate normal for this date — 60-year average.
0.09Grenville, Friday, 30 October
Climate normal for this date — 60-year average.
0.08Grenville, Saturday, 31 October
Climate normal for this date — 60-year average.
0.06Grenville, Sunday, 1 November
Climate normal for this date — 60-year average.
0.05Grenville, Monday, 2 November
Climate normal for this date — 60-year average.
0.04Grenville, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.02Grenville, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.03Grenville, Thursday, 5 November
Climate normal for this date — 60-year average.
0.03Grenville, Friday, 6 November
Climate normal for this date — 60-year average.
0.04Grenville, Saturday, 7 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 Grenville, 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 Grenville, 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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