Weather in Prospect Heights, IL
Prospect Heights, Wednesday, 28 October, 05:23
Partly cloudy. Feels like 54°. High 73°, low 55°.
Monthly outlook for Prospect Heights, IL: average high 58.3°, average low 48.4°. That is 3.3° above the climate normal for October. Precipitation is expected on 9 days (about 6.2 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 28 October (73.4°), the coolest 7 November (41°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 28 October – 6 November | 61.4° | 54° | +4.1° |
| 7 November – 16 November | 53.2° | 48.4° | +2.6° |
| 17 November – 26 November | at normal | 44.9° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Park Ridge (8 mi).
0.04
Prospect Heights, Thursday, 29 October
Light rain. High 69°, low 50°.
0.01Prospect Heights, Friday, 30 October
Light rain. High 61°, low 45°.
1.15Prospect Heights, Saturday, 31 October
Heavy rain. High 57°, low 52°.
0
Prospect Heights, Sunday, 1 November
Overcast. High 63°, low 48°.
0.24Prospect Heights, Monday, 2 November
Rain. High 68°, low 55°.
1.69Prospect Heights, Tuesday, 3 November
Rain. High 59°, low 56°.
1.31Prospect Heights, Wednesday, 4 November
Rain. High 59°, low 57°.
1.04Prospect Heights, Thursday, 5 November
Rain. High 57°, low 49°.
0.05Prospect Heights, Friday, 6 November
Light rain. High 48°, low 44°.
0Prospect Heights, Saturday, 7 November
Overcast. High 51°, low 41°.
0
Prospect Heights, Sunday, 8 November
Clear. High 54°, low 41°.
0
Prospect Heights, Monday, 9 November
Partly cloudy. High 57°, low 44°.
0.1Prospect Heights, Tuesday, 10 November
Light rain. High 56°, low 48°.
0.27Prospect Heights, Wednesday, 11 November
Rain. High 55°, low 47°.
0.33Prospect Heights, Thursday, 12 November
Rain. High 46°, low 44°.
0.05
Prospect Heights, Friday, 13 November
Climate normal for this date — 60-year average.
0.07
Prospect Heights, Saturday, 14 November
Climate normal for this date — 60-year average.
0.09Prospect Heights, Sunday, 15 November
Climate normal for this date — 60-year average.
0.05Prospect Heights, Monday, 16 November
Climate normal for this date — 60-year average.
0.09Prospect Heights, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.13Prospect Heights, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.07Prospect Heights, Thursday, 19 November
Climate normal for this date — 60-year average.
0.09Prospect Heights, Friday, 20 November
Climate normal for this date — 60-year average.
0.1Prospect Heights, Saturday, 21 November
Climate normal for this date — 60-year average.
0.05Prospect Heights, Sunday, 22 November
Climate normal for this date — 60-year average.
0.08Prospect Heights, Monday, 23 November
Climate normal for this date — 60-year average.
0.07Prospect Heights, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.09Prospect Heights, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.12Prospect Heights, Thursday, 26 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 Prospect 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 Prospect 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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