Weather in Fairview Heights, IL
Fairview Heights, Saturday, 8 August, 21:15
Clear. Feels like 80°. High 90°, low 70°.
Monthly outlook for Fairview Heights, IL: average high 85.9°, average low 68.1°. That is 0.2° below the climate normal for August. Precipitation is expected on 7 days (about 1.9 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 11 August (101.5°), the coolest 21 August (57.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 87.1° | 86.4° | +0.4° |
| 18 August – 27 August | 83.9° | 86.5° | -1.5° |
| 28 August – 6 September | at normal | 84.4° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — St. Louis (13 mi).
0
Fairview Heights, Sunday, 9 August
Partly cloudy. High 95°, low 72°.
0
Fairview Heights, Monday, 10 August
Mostly clear. High 99°, low 75°.
0.08
Fairview Heights, Tuesday, 11 August
Light rain. High 101°, low 73°.
0.11Fairview Heights, Wednesday, 12 August
Light rain. High 90°, low 72°.
0.86Fairview Heights, Thursday, 13 August
Rain. High 78°, low 70°.
0.41Fairview Heights, Friday, 14 August
Rain. High 75°, low 69°.
0.17Fairview Heights, Saturday, 15 August
Light rain. High 79°, low 67°.
0.03Fairview Heights, Sunday, 16 August
Light rain. High 82°, low 66°.
0.04Fairview Heights, Monday, 17 August
Light rain. High 82°, low 68°.
0.02Fairview Heights, Tuesday, 18 August
Light rain. High 81°, low 69°.
0
Fairview Heights, Wednesday, 19 August
Overcast. High 86°, low 69°.
0Fairview Heights, Thursday, 20 August
Mostly clear. High 76°, low 59°.
0.07Fairview Heights, Friday, 21 August
Light rain. High 76°, low 58°.
0.14Fairview Heights, Saturday, 22 August
Light rain. High 92°, low 62°.
0.02Fairview Heights, Sunday, 23 August
Light rain. High 93°, low 71°.
0.09Fairview Heights, Monday, 24 August
Climate normal for this date — 60-year average.
0.06Fairview Heights, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.13Fairview Heights, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.12Fairview Heights, Thursday, 27 August
Climate normal for this date — 60-year average.
0.08Fairview Heights, Friday, 28 August
Climate normal for this date — 60-year average.
0.07Fairview Heights, Saturday, 29 August
Climate normal for this date — 60-year average.
0.11Fairview Heights, Sunday, 30 August
Climate normal for this date — 60-year average.
0.11Fairview Heights, Monday, 31 August
Climate normal for this date — 60-year average.
0.11
Fairview Heights, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.12Fairview Heights, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.1Fairview Heights, Thursday, 3 September
Climate normal for this date — 60-year average.
0.13Fairview Heights, Friday, 4 September
Climate normal for this date — 60-year average.
0.05Fairview Heights, Saturday, 5 September
Climate normal for this date — 60-year average.
0.05Fairview Heights, Sunday, 6 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 Fairview Heights, IL 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 Fairview Heights, IL 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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