Weather in Royal Heights, IL
Royal Heights, Sunday, 9 August, 11:15
Partly cloudy. Feels like 99°. High 95°, low 72°.
Monthly outlook for Royal Heights, IL: average high 92.9°, average low 69.2°. That is 3.7° above the climate normal for August. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 10 August (101.1°), the coolest 24 August (58.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 95.1° | 86.3° | +4.9° |
| 19 August – 28 August | 89.3° | 86.5° | +1.6° |
| 29 August – 7 September | at normal | 84.1° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — St. Louis (14 mi).
0
Royal Heights, Monday, 10 August
Clear. High 101°, low 75°.
0
Royal Heights, Tuesday, 11 August
Light rain. High 100°, low 76°.
0.04Royal Heights, Wednesday, 12 August
Light rain. High 97°, low 74°.
0.13Royal Heights, Thursday, 13 August
Light rain. High 95°, low 71°.
0
Royal Heights, Friday, 14 August
Overcast. High 88°, low 71°.
0Royal Heights, Saturday, 15 August
Overcast. High 97°, low 70°.
0Royal Heights, Sunday, 16 August
Clear. High 96°, low 76°.
0Royal Heights, Monday, 17 August
Partly cloudy. High 82°, low 64°.
0.12Royal Heights, Tuesday, 18 August
Light rain. High 100°, low 66°.
0Royal Heights, Wednesday, 19 August
Partly cloudy. High 94°, low 70°.
0Royal Heights, Thursday, 20 August
Clear. High 83°, low 63°.
0.06Royal Heights, Friday, 21 August
Light rain. High 97°, low 64°.
0Royal Heights, Saturday, 22 August
Clear. High 94°, low 74°.
0Royal Heights, Sunday, 23 August
Clear. High 83°, low 62°.
0Royal Heights, Monday, 24 August
Clear. High 85°, low 59°.
0.06Royal Heights, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.13Royal Heights, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.12Royal Heights, Thursday, 27 August
Climate normal for this date — 60-year average.
0.08Royal Heights, Friday, 28 August
Climate normal for this date — 60-year average.
0.07Royal Heights, Saturday, 29 August
Climate normal for this date — 60-year average.
0.11Royal Heights, Sunday, 30 August
Climate normal for this date — 60-year average.
0.11Royal Heights, Monday, 31 August
Climate normal for this date — 60-year average.
0.11
Royal Heights, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.12Royal Heights, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.1Royal Heights, Thursday, 3 September
Climate normal for this date — 60-year average.
0.13Royal Heights, Friday, 4 September
Climate normal for this date — 60-year average.
0.05
Royal Heights, Saturday, 5 September
Climate normal for this date — 60-year average.
0.05Royal Heights, Sunday, 6 September
Climate normal for this date — 60-year average.
0.1Royal Heights, 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 Royal 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 Royal 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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