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Shaded-relief map of Mount Arlington, New Jersey: rivers, roads, the city limits and where the water drains.
NEW JERSEY · MORRIS COUNTY

Mount Arlington

5,979 people, 1,140 ft above sea level in Morris County.

1,140 ftElevation, city center
5,979People, 2024 estimate
2 sq miLand area
Mostly cloudy 45°
Mostly cloudy now Dew point 31° · W 14 mph · high 44°
City of Mount Arlington River Interstate 2 miles
Explore the plate Order a print

The Mount Arlington 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 Arlington

NWS forecast and National Blend of Models · updated 6:00 PM EST
RIGHT NOW Newark International Airport (KEWR) · 6:51 PM
Mostly cloudy
45° Mostly cloudy Feels like 39° · high of 44° near 7 PM
WindW 14 mphgusts 22
Humidity58%rising to 73% by morning
Pressure29.88 in →steady
Visibility10 mihaze-free
CloudsBrokenbases near 6,000 ft
UV index—no forecast
Dew point 31° · Dryabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Clear
Not this weeknone in the forecast for a week
LIKELY AMOUNT—nothing expected
LAST RAINNov. 130.29 in · 1 dry day
ALERTS & OUTLOOKS
No watches or warnings for Morris County
NWS Mount Holly and the Storm Prediction Center · checked 7:20 PM
SUN & MOON
↑ 6:44 AM4:41 PM ↓
9 h 56 m of daylight, 2 minutes less than yesterday
Waxing crescent, 27% lit. Next full moon: Nov. 24.
AIR & POLLEN
18
GOODAir quality index · ozone
Tomorrow: 35, good. 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
7p
10p
1a
4a
7a
10a
1p
4p
7p
10p
1a
4a
7a
10a
1p
4p
7p
10p
1a
4a
7a
10a
1p
4p
partly cloudy night
partly cloudy night
partly cloudy night
mostly clear night
clear day
mostly sunny
mostly sunny
mostly clear night
mostly clear night
mostly clear night
mostly clear night
mostly clear night
mostly sunny
partly cloudy day
partly cloudy day
partly cloudy night
mostly clear night
mostly clear night
mostly clear night
mostly clear night
mostly sunny
clear day
clear day
clear night
TEMPERATURE °F
44°
39°
52°
38°
53°
38°
CHANCE OF RAIN
50%
WIND, MPH
13
13
12
12
14
15
15
13
10
10
8
8
9
10
10
9
8
7
7
6
6
6
7
7
HOW IT FEELS · DEW POINT
Dry: dew points 28 to 37°

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 56° / 39°
SAT Nov. 14 Partly cloudy Partly cloudy
44° 36°
10% rain — W 13 A
SUN Nov. 15 Mostly sunny; warmer Mostly sunny; warmer
52° 35°
0% rain — NW 14 A
MON Nov. 16 Partly cloudy Partly cloudy
54° 35°
0% rain — NNW 10 B
TUE Nov. 17 Mostly sunny Mostly sunny
59° 37°
0% rain — WNW 8 A
WED Nov. 18 Sunny Sunny
63° 39°
0% rain — W 8 A
THU Nov. 19 Mostly sunny Mostly sunny
64° 41°
0% rain — WSW 7 A
FRI Nov. 20 Mostly sunny Mostly sunny
65° 43°
0% rain — WNW 6 B
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 Arlington about 5,000 feet above the ground was over British Columbia three days ago, and over the Great Lakes a day ago, about 2,690 miles back along its path. Near the ground the air came from British Columbia; at 10,000 feet, from the Gulf of Alaska. 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 1993 Nov. 16, 1993

The hottest this week has been

76° on Nov. 16, 1993, the hottest reading for this week of the year since 1893. Next is 74° in 1927.

74°
76°
19271993
Source: NOAA RCC-ACIS, the Charlotteburg Reservoir record since 1893.
MILE2
THE GROUND

What Mount Arlington stands on

Mount Arlington’s center stands about 1,140 ft above sea level. Within three miles the land runs from 680 ft to 1,190 ft, a difference of 510 ft: hilly country. The highest named summit within 15 miles is Bowling Green Mountain, about 1,420 ft, 8 miles northeast.

The section below crosses 18 rock units mapped at the surface.

Johnsonburg to Parsippany-Troy Hills, cut in half

A section northwest to southeast, 24 miles through the town center
250 ft500 ft750 ft1,000 ft MOUNT ARLINGTON1,140 ftHigh Rocks810 ftPequest Riverabout 570 ftDover680 ftDenville630 ftParsippany-Troy Hills300 ft ← NW · JohnsonburgParsippany-Troy Hills · SE →

Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 20×. 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

Diorite

Age: Mesoproterozoic, 1 to 1.6 billion years old. About 4 mi of the line.

Allentown Dolomite

Dolostone. Age: Cambrian to Early Ordovician, 471 to 497 million years old. About 3 mi of the line.

Pyroxene Granite

Granite. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 2 mi of the line.

Microperthite Alaskite

Granite. Age: Mesoproterozoic, 1 to 1.6 billion years old. About 2 mi of the line.

Hornblende Granite

Granite. Age: Mesoproterozoic, 1.1 to 1.1 billion years old. About 2 mi of the line.

Boonton Formation

Sandstone, siltstone, mudstone. Age: Early Jurassic, 175 to 202 million years old. About 2 mi of the line.

From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale. 12 smaller units along the line are not listed.

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 Arlington’s rain goes

A raindrop that lands in Mount Arlington reaches Delaware Bay and the Atlantic Ocean by way of the Musconetcong and the Delaware: about 190 river miles.

THE WAY DOWN, TO SCALE
Mount Arlington≈ 190 mi · Delaware Bay and the Atlantic Ocean
FROM THE CENTER OF MOUNT ARLINGTON ≈ 190 mi to Delaware Bay and the Atlantic Ocean Musconetcong → Delaware

140 miles of the trip are on the Delaware.

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

MILE5
THE ALMANAC

Mount Arlington’s year

1991–2020 normals · records since 1893 · Charlotteburg Reservoir, 14 mi northeast

Mount Arlington has a hot-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 19° in January. About 52 inches of rain fall in a normal year.

36°19°39°19°47°27°59°37°70°48°78°57°83°62°81°59°75°52°63°41°51°32°41°25° JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 12 TODAY 52.2 in rain a year
Normal high to low, by month Record high to low, by day Rain by month Freezing
July, average83° / 62°high / low, the warmest month
January, average36° / 19°high / low, the coldest month
Rain a year52.2 inwettest months: October and September
Hottest on record105°FJuly 9, 1936
Coldest on record−26°FJanuary 14, 1912
Wettest day on record7.76 inSeptember 19, 1894
Snowiest day on record27.0 inFebruary 4, 1926
90° days a year10none reach 100°
Nights at or below 32°138and 25 days that stay below freezing
Climate typeHot-summer humid continentalKöppen Dfa

AROUND THE RING

1Freeze seasonfrom the first fall freeze, about Oct. 13, to the last in spring, about April 30 (median dates)
2Lows below freezingNov. 14 to April 1; normal lows fall below 32°
NOVEMBER 14 IN THE RECORD

On November 14 Mount Arlington normally reaches 52° and falls to 32°. The record high is 71°, in 1902; the record low 10°, in 1905. The most rain on this date, 1.37 in, fell in 1935.

MONTH BY MONTH
JanFebMarAprMayJunJulAugSepOctNovDec
Normal high36°39°47°59°70°78°83°81°75°63°51°41°
Normal low19°19°27°37°48°57°62°59°52°41°32°25°
Rain, inches4.113.154.454.224.014.854.594.334.884.973.794.81
Record high71° (1950)76° (2018)85° (1998)93° (2002)96° (1936)99° (1934)105° (1936)100° (1933)100° (1953)90° (1941)81° (2024)73° (1998)
Record low−26° (1912)−25° (1943)−10° (2003)6° (1923)23° (1922)29° (1957)36° (1945)32° (1940)23° (1904)10° (1936)−1° (1938)−19° (1917)

Normals 1991–2020 and records since 1893 at Charlotteburg Reservoir, 14 miles northeast, 360 ft lower. NOAA, through RCC-ACIS.

MILE7
ON THE NETWORK

Around Mount Arlington on the Forecast Network

Neighboring plates

Newark NJ · 28 MI 28 miles southeast Jersey City NJ · 33 MI 33 miles southeast Yonkers NY · 40 MI 40 miles east New York NY · 41 MI 41 miles southeast Philadelphia PA · 68 MI 68 miles south Springfield MA · 137 MI 137 miles northeast
FORECASTCITY
Map of Mount Arlington, New Jersey. Explore the plate
NEW JERSEY · MORRIS

Mount Arlington

5,979 people, 1,140 ft above sea level in Morris County.

1,140 ftElevation
5,979People
2 sq miLand
Mostly cloudy 45°
Mostly cloudyDew point 31°
1

Today in Mount Arlington

NEXT 15 HOURS
Now partly cloudy night 44° 3%
10p partly cloudy night 43° 6%
1a partly cloudy night 42° 4%
4a mostly clear night 40° 1%
7a mostly sunny 40° 0%
10a mostly sunny 48° 1%
Clear
NEXT RAINNone this week
→
Sat10%
Partly cloudy Partly cloudy
36
44
A
Sun0%
Mostly sunny; warmer Mostly sunny; warmer
35
52
A
Mon0%
Partly cloudy Partly cloudy
35
54
B
Tue0%
Mostly sunny Mostly sunny
37
59
A
Wed0%
Sunny Sunny
39
63
A
Thu0%
Mostly sunny Mostly sunny
41
64
A
Fri0%
Mostly sunny Mostly sunny
43
65
B
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
THIS WEEK IN 1993 · NOV. 16, 1993

76°, the hottest this week of the year has been since 1893.

2

What Mount Arlington stands on

Mount Arlington’s center stands about 1,140 ft above sea level. Within three miles the land runs from 680 ft to 1,190 ft, a difference of 510 ft: hilly country. The highest named summit within 15 miles is Bowling Green Mountain, about 1,420 ft, 8 miles northeast.

Mount Arlington, northwest to southeast Mount Arlington1,140 ftHigh Rocks810 ftPequest Riverabout 570 ft ← NWSE → 24 miles through the town center; vertical exaggeration about 39×. Colors: rock at the surface.
Elevation, center1,140 ft
Within 3 miles680 to 1,190 ft
Lie of the landHilly (510 ft of relief)
High point nearbyBowling Green Mountain, 1,420 ft, 8 mi northeast
5

Mount Arlington’s year

Mount Arlington has a hot-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 19° in January. About 52 inches of rain fall in a normal year.

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 12 52.2 in
July, average83° / 62° · high / low, the warmest month
January, average36° / 19° · high / low, the coldest month
Rain a year52.2 in · wettest months: October and September
Hottest on record105°F · July 9, 1936
Coldest on record−26°F · January 14, 1912
Wettest day on record7.76 in · September 19, 1894
Snowiest day on record27.0 in · February 4, 1926
90° days a year10 · none reach 100°
Nights at or below 32°138 · and 25 days that stay below freezing
Climate typeHot-summer humid continental · Köppen Dfa
1Freeze season · from the first fall freeze, about Oct. 13, to the last in spring, about April 30 (median dates)
2Lows below freezing · Nov. 14 to April 1; normal lows fall below 32°
NOVEMBER 14 IN THE RECORD

On November 14 Mount Arlington normally reaches 52° and falls to 32°. The record high is 71°, in 1902; the record low 10°, in 1905. The most rain on this date, 1.37 in, fell in 1935.

Normals 1991–2020 and records since 1893 at Charlotteburg Reservoir, 14 miles northeast, 360 ft lower. NOAA, through RCC-ACIS.
3

Where the rain goes

≈ 190 mito the AtlanticMusconetcong → Delaware

A raindrop that lands in Mount Arlington reaches Delaware Bay and the Atlantic Ocean by way of the Musconetcong and the Delaware: about 190 river miles.

140 miles of the trip are on the Delaware.