Weather in Marthasville, MO
Marthasville, Sunday, 9 August, 05:41
Partly cloudy. Feels like 74°. High 96°, low 72°.
Monthly outlook for Marthasville, MO: average high 100.7°, average low 74.2°. That is 8.2° above the climate normal for August. Precipitation is expected on 6 days (about 0.4 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 20 August (114.4°), the coolest 14 August (66.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 95° | 86.1° | +5° |
| 19 August – 28 August | 110.3° | 86.1° | +13.4° |
| 29 August – 7 September | at normal | 83.6° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — New Haven (9 mi).
0.1
Marthasville, Monday, 10 August
Rain. High 101°, low 75°.
0
Marthasville, Tuesday, 11 August
Overcast. High 103°, low 72°.
0Marthasville, Wednesday, 12 August
Overcast. High 98°, low 78°.
0.07Marthasville, Thursday, 13 August
Light rain. High 93°, low 73°.
0.01Marthasville, Friday, 14 August
Light rain. High 78°, low 67°.
0.03Marthasville, Saturday, 15 August
Light rain. High 93°, low 67°.
0Marthasville, Sunday, 16 August
Overcast. High 95°, low 72°.
0.04Marthasville, Monday, 17 August
Light rain. High 92°, low 72°.
0.07Marthasville, Tuesday, 18 August
Light rain. High 101°, low 69°.
0
Marthasville, Wednesday, 19 August
Clear. High 114°, low 75°.
0Marthasville, Thursday, 20 August
Clear. High 114°, low 82°.
0Marthasville, Friday, 21 August
Clear. High 112°, low 80°.
0.01Marthasville, Saturday, 22 August
Light rain. High 113°, low 79°.
0.04Marthasville, Sunday, 23 August
Light rain. High 108°, low 79°.
0.06Marthasville, Monday, 24 August
Light rain. High 101°, low 74°.
0.07
Marthasville, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.17Marthasville, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.11Marthasville, Thursday, 27 August
Climate normal for this date — 60-year average.
0.08Marthasville, Friday, 28 August
Climate normal for this date — 60-year average.
0.08Marthasville, Saturday, 29 August
Climate normal for this date — 60-year average.
0.14
Marthasville, Sunday, 30 August
Climate normal for this date — 60-year average.
0.11Marthasville, Monday, 31 August
Climate normal for this date — 60-year average.
0.09Marthasville, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.13Marthasville, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.09Marthasville, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09Marthasville, Friday, 4 September
Climate normal for this date — 60-year average.
0.04
Marthasville, Saturday, 5 September
Climate normal for this date — 60-year average.
0.06Marthasville, Sunday, 6 September
Climate normal for this date — 60-year average.
0.07Marthasville, 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 Marthasville, MO 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 Marthasville, MO 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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