Weather in Old Jefferson, LA
Old Jefferson, Sunday, 9 August, 02:44
Mostly clear. Feels like 79°. High 94°, low 76°.
Monthly outlook for Old Jefferson, LA: average high 100.6°, average low 77.1°. That is 6.1° above the climate normal for August. Precipitation is expected on 4 days (about 0.5 inches), against a normal of 9 days and 2.6 inches. The warmest day looks like 18 August (106.3°), the coolest 14 August (74.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 99.5° | 89.5° | +5.5° |
| 19 August – 28 August | 102.5° | 89.4° | +7.3° |
| 29 August – 7 September | at normal | 87.6° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Baton Rouge (9 mi).
0.01
Old Jefferson, Monday, 10 August
Light rain. High 95°, low 77°.
0
Old Jefferson, Tuesday, 11 August
Clear. High 98°, low 76°.
0Old Jefferson, Wednesday, 12 August
Clear. High 98°, low 77°.
0.01Old Jefferson, Thursday, 13 August
Light rain. High 97°, low 78°.
0
Old Jefferson, Friday, 14 August
Overcast. High 100°, low 74°.
0
Old Jefferson, Saturday, 15 August
Partly cloudy. High 101°, low 76°.
0Old Jefferson, Sunday, 16 August
Partly cloudy. High 102°, low 76°.
0
Old Jefferson, Monday, 17 August
Mostly clear. High 104°, low 79°.
0Old Jefferson, Tuesday, 18 August
Overcast. High 106°, low 79°.
0.08Old Jefferson, Wednesday, 19 August
Light rain. High 106°, low 77°.
0.09Old Jefferson, Thursday, 20 August
Light rain. High 105°, low 78°.
0.03Old Jefferson, Friday, 21 August
Light rain. High 103°, low 80°.
0Old Jefferson, Saturday, 22 August
Partly cloudy. High 101°, low 79°.
0.24Old Jefferson, Sunday, 23 August
Light rain. High 101°, low 76°.
0.07Old Jefferson, Monday, 24 August
Light rain. High 98°, low 75°.
0.14
Old Jefferson, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.23Old Jefferson, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.13Old Jefferson, Thursday, 27 August
Climate normal for this date — 60-year average.
0.16Old Jefferson, Friday, 28 August
Climate normal for this date — 60-year average.
0.34Old Jefferson, Saturday, 29 August
Climate normal for this date — 60-year average.
0.18Old Jefferson, Sunday, 30 August
Climate normal for this date — 60-year average.
0.11Old Jefferson, Monday, 31 August
Climate normal for this date — 60-year average.
0.18Old Jefferson, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.18Old Jefferson, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.17Old Jefferson, Thursday, 3 September
Climate normal for this date — 60-year average.
0.2Old Jefferson, Friday, 4 September
Climate normal for this date — 60-year average.
0.19Old Jefferson, Saturday, 5 September
Climate normal for this date — 60-year average.
0.2Old Jefferson, Sunday, 6 September
Climate normal for this date — 60-year average.
0.1Old Jefferson, Monday, 7 September
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 Old Jefferson, LA 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 Old Jefferson, LA 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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