Weather in Johnston, SC
Johnston, Thursday, 8 October, 15:03
Overcast. Feels like 81°. High 81°, low 55°.
Monthly outlook for Johnston, SC: average high 78.9°, average low 60.4°. That is 3.2° above the climate normal for October. Precipitation is expected on 3 days (about 1.8 inches), against a normal of 3 days and 1.4 inches. The warmest day looks like 14 October (89.4°), the coolest 19 October (45.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 October – 17 October | 82.1° | 74.3° | +4.3° |
| 18 October – 27 October | 73.6° | 71° | +1.5° |
| 28 October – 6 November | at normal | 68.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Ridge Spring (8 mi).
0Johnston, Friday, 9 October
Overcast. High 79°, low 61°.
1.58
Johnston, Saturday, 10 October
Heavy rain. High 71°, low 62°.
0.09Johnston, Sunday, 11 October
Light rain. High 81°, low 69°.
0
Johnston, Monday, 12 October
Mostly clear. High 82°, low 64°.
0
Johnston, Tuesday, 13 October
Clear. High 87°, low 58°.
0Johnston, Wednesday, 14 October
Clear. High 89°, low 65°.
0Johnston, Thursday, 15 October
Overcast. High 81°, low 67°.
0Johnston, Friday, 16 October
Clear. High 82°, low 64°.
0Johnston, Saturday, 17 October
Clear. High 88°, low 65°.
0Johnston, Sunday, 18 October
Mostly clear. High 66°, low 50°.
0Johnston, Monday, 19 October
Overcast. High 70°, low 46°.
0Johnston, Tuesday, 20 October
Overcast. High 76°, low 52°.
0Johnston, Wednesday, 21 October
Overcast. High 74°, low 61°.
0.02Johnston, Thursday, 22 October
Light rain. High 75°, low 63°.
0.11Johnston, Friday, 23 October
Light rain. High 80°, low 64°.
0.07Johnston, Saturday, 24 October
Climate normal for this date — 60-year average.
0.09
Johnston, Sunday, 25 October
Climate normal for this date — 60-year average.
0.11Johnston, Monday, 26 October
Climate normal for this date — 60-year average.
0.11Johnston, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.09Johnston, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.07Johnston, Thursday, 29 October
Climate normal for this date — 60-year average.
0.11Johnston, Friday, 30 October
Climate normal for this date — 60-year average.
0.06Johnston, Saturday, 31 October
Climate normal for this date — 60-year average.
0.12Johnston, Sunday, 1 November
Climate normal for this date — 60-year average.
0.1Johnston, Monday, 2 November
Climate normal for this date — 60-year average.
0.03Johnston, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.09
Johnston, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.05Johnston, Thursday, 5 November
Climate normal for this date — 60-year average.
0.04Johnston, Friday, 6 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 Johnston, SC 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 Johnston, SC 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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