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Shaded-relief map of Mount Olive, Illinois: rivers, roads, the city limits and where the water drains.
ILLINOIS · MACOUPIN COUNTY

Mount Olive

1,941 people, 690 ft above sea level in Macoupin County.

690 ftElevation, city center
1,941People, 2024 estimate
1 sq miLand area
Sunny 46°
Sunny now Dew point 24° · Calm · high 45°
City of Mount Olive River Interstate 2 miles
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The Mount Olive plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.

MILE1
TODAY

Today in Mount Olive

NWS forecast and National Blend of Models · updated 3:00 PM CST
RIGHT NOW Litchfield Municipal Airport (K3LF) · 3:55 PM
Sunny
46° Sunny Feels like 46° · high of 45° near 4 PM
WindCalmno gusts
Humidity42%rising to 92% by morning
Pressure30.31 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 24° · Dry37° by Tuesday: more humid
DryComfortableStickyMuggyOppressive
NEXT RAIN
Clear
Not this weeknone in the forecast for a week
LIKELY AMOUNT—nothing expected
LAST RAINNov. 40.91 in · 10 dry days
ALERTS & OUTLOOKS
No watches or warnings for Macoupin County
NWS St Louis and the Storm Prediction Center · checked 4:16 PM
SUN & MOON
↑ 6:40 AM4:46 PM ↓
10 h 5 m of daylight, 2 minutes less than yesterday
Waxing crescent, 26% lit. Next full moon: Nov. 24.
AIR & POLLEN
24
GOODAir quality index · fine particles
Tomorrow: None, moderate. No pollen source yet.

The next three days, hour by hour

Sky: clear, cloudy, night Rain likely National Blend of Models
SATURDAY, NOV. 14
SUNDAY, NOV. 15
MONDAY, NOV. 16
TUESDAY, NOV. 17
4p
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1a
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4a
7a
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clear night
clear night
clear night
clear night
mostly clear night
partly cloudy day
partly cloudy day
mostly sunny
mostly clear night
clear night
mostly clear night
mostly clear night
mostly clear night
clear day
clear day
clear day
clear night
clear night
clear night
clear night
mostly clear night
mostly sunny
clear day
clear day
TEMPERATURE °F
45°
27°
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CHANCE OF RAIN
50%
WIND, MPH
0
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HOW IT FEELS · DEW POINT
Dry: dew points 23 to 37° More humid: 33° by Tuesday

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 80° / 62°
SAT Nov. 14 Sunny Sunny
45° 25°
0% rain — NNW 0 A
SUN Nov. 15 Partly cloudy Partly cloudy
52° 27°
0% rain — NNE 0 A
MON Nov. 16 Sunny Sunny
54° 29°
0% rain — SE 0 A
TUE Nov. 17 Partly cloudy Partly cloudy
56° 32°
0% rain — SSE 5 A
WED Nov. 18 Mostly sunny Mostly sunny
59° 42°
0% rain — S 12 B
THU Nov. 19 Partly cloudy Partly cloudy
64° 45°
10% rain — SW 5 C
FRI Nov. 20 Mostly sunny Mostly sunny
66° 48°
10% rain — SSE 7 C
How sure are we? AModels agree: highs within 4° BSome spread: within 8° CWide spread: check back
Range from the National Blend of Models percentiles · graded on Forecast Scores
AIR MAIL

Where today’s air came from

The air arriving over Mount Olive about 5,000 feet above the ground was over the open Pacific three days ago, and over the central Plains a day ago, about 2,930 miles back along its path. It came down from about 14,700 feet up, warming and drying as it sank. Near the ground the air came from the Canadian Prairies; at 10,000 feet, from the central Plains. It feels dry all the same. Traced back 72 hours through NOAA’s hourly RAP analyses and the GFS beyond them, nine paths at each of three heights.

THIS WEEK IN 2003 Nov. 17–18, 2003

The wettest two days this week has seen

3.45 inches of rain fell in two days, the most for this week of the year since records began in 1895. The next wettest, 2.46 inches, fell in 1992.

2.46″
3.45″
19922003
Source: NOAA RCC-ACIS, the Hillsboro record since 1895.
MILE2
THE GROUND

What Mount Olive stands on

Mount Olive’s center stands about 690 ft above sea level. Within three miles the land runs from 600 ft to 690 ft, a difference of 90 ft: gently rolling country.

Under the town center the state geologic map shows Shelburn-Patoka Formations undivided (shale, limestone), from the Late Pennsylvanian, 304 to 307 million years old.

The section below crosses 2 rock units mapped at the surface.

Prairietown to Butler, cut in half

A section southwest to northeast, 24 miles through the town center
500 ft600 ft700 ft MOUNT OLIVE690 ftLow point490 ftStaunton610 ftHigh point of the line710 ftWest Fork Shoal Creekabout 560 ft ← SW · PrairietownButler · NE →

Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 64×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.

Rock at the surface along the line

Shelburn-Patoka Formations undivided

Shale, limestone. Age: Late Pennsylvanian, 304 to 307 million years old. About 13 mi of the line.

Bond Formation

Shale, sandstone, limestone. Age: Late Pennsylvanian, 304 to 307 million years old. About 12 mi of the line.

From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.

Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.

MILE3
THE WATER

Where Mount Olive’s rain goes

A raindrop that lands in Mount Olive reaches the Gulf of America by way of Sugar Creek, Cahokia Creek and the Mississippi: about 1,210 river miles.

THE WAY DOWN, TO SCALE
Mount Olive≈ 1,210 mi · the Gulf of America
FROM THE CENTER OF MOUNT OLIVE ≈ 1,210 mi to the Gulf of America Sugar Creek → Cahokia Creek → Mississippi

Traced down the USGS NHDPlus V2.1 river network from the Census center point of Mount Olive; river miles along the main stem, rounded.

MILE5
THE ALMANAC

Mount Olive’s year

1991–2020 normals · records since 1895 · Hillsboro, 14 mi east-northeast

Mount Olive has a hot-summer humid continental climate. Summer afternoons average 89° in July; winter nights fall to about 21° in January. About 42 inches of rain fall in a normal year.

38°21°45°26°55°34°68°44°78°54°86°63°89°67°87°65°82°57°70°46°55°35°43°26° JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 1 TODAY MOUNT OLIVE 42.1 in rain a year
Normal high to low, by month Record high to low, by day Rain by month Freezing
July, average89° / 67°high / low, the warmest month
January, average38° / 21°high / low, the coldest month
Rain a year42.1 inwettest months: May and April
Hottest on record114°FJuly 14, 1954
Coldest on record−22°FFebruary 14, 1905
Wettest day on record6.53 inOctober 18, 1905
Snowiest day on record14.3 inMarch 25, 2013
Climate typeHot-summer humid continentalKöppen Dfa

AROUND THE RING

1Lows below freezingNov. 23 to March 10; normal lows fall below 32°
NOVEMBER 14 IN THE RECORD

On November 14 Mount Olive normally reaches 55° and falls to 36°. The record high is 78°, in 1971; the record low 11°, in 1986. The most rain on this date, 2.25 in, fell in 1993.

MONTH BY MONTH
JanFebMarAprMayJunJulAugSepOctNovDec
Normal high38°45°55°68°78°86°89°87°82°70°55°43°
Normal low21°26°34°44°54°63°67°65°57°46°35°26°
Rain, inches2.522.613.055.035.063.833.743.143.303.413.762.62
Record high75° (1909)79° (1932)90° (1929)92° (1989)99° (1895)106° (1931)114° (1954)112° (1918)105° (1954)95° (1922)83° (1950)74° (1970)
Record low−21° (1985)−22° (1905)−10° (1960)18° (1920)28° (1966)37° (1917)45° (1930)39° (1986)26° (1899)17° (1925)−5° (1950)−20° (1989)

Normals 1991–2020 and records since 1895 at Hillsboro, 14 miles east-northeast. NOAA, through RCC-ACIS.

MILE7
ON THE NETWORK

Around Mount Olive on the Forecast Network

Neighboring plates

O'Fallon IL · 34 MI 34 miles south Florissant MO · 37 MI 37 miles southwest St. Louis MO · 41 MI 41 miles southwest Springfield IL · 50 MI 50 miles north Columbia MO · 140 MI 140 miles west Evansville IN · 140 MI 140 miles southeast
FORECASTCITY
Map of Mount Olive, Illinois. Explore the plate
ILLINOIS · MACOUPIN

Mount Olive

1,941 people, 690 ft above sea level in Macoupin County.

690 ftElevation
1,941People
1 sq miLand
Sunny 46°
SunnyDew point 24°
1

Today in Mount Olive

NEXT 15 HOURS
Now clear day 45° 0%
7p clear night 35° 0%
10p clear night 31° 0%
1a clear night 28° 0%
4a mostly clear night 28° 0%
7a mostly sunny 27° 0%
Clear
NEXT RAINNone this week
→
Sat0%
Sunny Sunny
25
45
A
Sun0%
Partly cloudy Partly cloudy
27
52
A
Mon0%
Sunny Sunny
29
54
A
Tue0%
Partly cloudy Partly cloudy
32
56
A
Wed0%
Mostly sunny Mostly sunny
42
59
B
Thu10%
Partly cloudy Partly cloudy
45
64
C
Fri10%
Mostly sunny Mostly sunny
48
66
C
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
THIS WEEK IN 2003 · NOV. 17–18, 2003

3.45 inches in two days, the most for this week since 1895.

2

What Mount Olive stands on

Mount Olive’s center stands about 690 ft above sea level. Within three miles the land runs from 600 ft to 690 ft, a difference of 90 ft: gently rolling country.

Mount Olive, southwest to northeast Mount Olive690 ftHigh point710 ftWest Fork Shoal Creekabout 560 ft ← SWNE → 24 miles through the town center; vertical exaggeration about 122×. Colors: rock at the surface.
Elevation, center690 ft
Within 3 miles600 to 690 ft
Lie of the landGently rolling (90 ft of relief)
Rock at the surfaceShelburn-Patoka Formations undivided
Its ageLate Pennsylvanian, 304 to 307 million years old
5

Mount Olive’s year

Mount Olive has a hot-summer humid continental climate. Summer afternoons average 89° in July; winter nights fall to about 21° in January. About 42 inches of rain fall in a normal year.

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 1 42.1 in
July, average89° / 67° · high / low, the warmest month
January, average38° / 21° · high / low, the coldest month
Rain a year42.1 in · wettest months: May and April
Hottest on record114°F · July 14, 1954
Coldest on record−22°F · February 14, 1905
Wettest day on record6.53 in · October 18, 1905
Snowiest day on record14.3 in · March 25, 2013
Climate typeHot-summer humid continental · Köppen Dfa
1Lows below freezing · Nov. 23 to March 10; normal lows fall below 32°
NOVEMBER 14 IN THE RECORD

On November 14 Mount Olive normally reaches 55° and falls to 36°. The record high is 78°, in 1971; the record low 11°, in 1986. The most rain on this date, 2.25 in, fell in 1993.

Normals 1991–2020 and records since 1895 at Hillsboro, 14 miles east-northeast. NOAA, through RCC-ACIS.
3

Where the rain goes

≈ 1,210 mito the Gulf of AmericaSugar Creek → Cahokia Creek → Mississippi

A raindrop that lands in Mount Olive reaches the Gulf of America by way of Sugar Creek, Cahokia Creek and the Mississippi: about 1,210 river miles.