- 55/64/70 @ Poplar St. BridgeSS0234
Beside a road/0.4 mi away/-/- ft from here
temp, pavement temp, wind, visibility, precip
Gateway Arch National Park, Illinois
National Park in St. Clair County, Illinois74°
81°/66°
Mostly cloudy·
Feels like 74°·Gentle breeze 10 mph WNW
Coming up. Tomorrow is 23 degrees cooler: a high of 58° after 81° today.
Now. Gateway Arch National Park is 74° and mostly cloudy at 10 PM. The dew point is 63°, so the air feels humid and sticky. Gentle breeze from the west-northwest at 10 mph, gusting to 35 mph.
Today and tonight. Tonight falls to about 49° by 8 AM, under a mostly clear sky.
The week. The warmest day ahead is Wednesday, near 78°, and the coolest tomorrow, near 58°. The days ahead look dry. Frost is possible Sunday morning, a low of 35°.
The sky now. The Moon is a waxing crescent, 26% lit, and stays below the horizon until dawn. The next full Moon is Sunday, Oct 25. Look for Saturn, bright in the south-southeast. A planet shines with a steady light where the stars around it twinkle. The Orionids meteor shower is active, peaking around Oct 21: at its peak, up to about 20 meteors an hour can be seen from a dark site. The sky is forecast to stay clear: a good night to look up. The day is 11 hours 14 minutes long, 2 minutes shorter than yesterday.
0UV Low
25Air quality
80%Humidity
80%Cloud
Now
10:00 PM
74feels74
19%
Today
Oct 15
8166
95%
14mph
Fri
Oct 16
5846
20%
17mph
Sat
Oct 17
6039
UV 6
Sun
Oct 18
6635
UV 6
Mon
Oct 19
7140
overcast
Tue
Oct 20
7543
overcast
Wed
Oct 21
7846
overcast
74°
81°66°
58°46°
60°39°
66°35°
71°40°
75°43°
78°46°
As of 10:00 PM in Gateway Arch National Park, Illinois.
Air quality
The air at Gateway Arch National Park
Index 25, good, led by ozone. Read at 10 PM from its reporting area, St. Louis (Metro-east) (IL), 12 miles off.
25Good
- Fine particles (PM2.5)18Good2.6 mi
- Ozone25Good29 ppb2.7 mi
- Coarse particles (PM10)7Good2.6 mi
- Nitrogen dioxide3Good3.3 ppb2.7 mi
- Sulfur dioxide0Good0.8 ppb2.7 mi
- Carbon monoxide-0.1 ppm2.7 mi
The days ahead
Highest moderate, today, led by fine particles. Yesterday measured 39, good.
GoodModerate
- 39YesterdayOct 14
- ModerateTodayOct 15
- GoodFriOct 16
- GoodSatOct 17
- GoodSunOct 18
- GoodMonOct 19
Smoke, the next 46 hours
No smoke near the ground through Sat 7 PM.
Precipitation
What has fallen at Gateway Arch National Park
0.67 in in the last 24 hours, 1.85 in over the last 3 days, to Thu 9 PM. Measured by radar and rain gauges, as water.
- Last 24 hours
- 0.67in
- Last 3 days
- 1.85in
3 days agoLast 24 hours 36%
Visibility
How far you can see at Gateway Arch National Park, the next 46 hours
Visibility stays 7 miles or more through Sat 7 PM, lowest 8 miles Fri 7 PM.
F
Now, today, and the week
Weather instrument stations by state
Park
- Designation
- National Park
- Area
- 0.3 sq mi
- Height at its point
- 417 ft
- Also in
- Missouri
- County
- St. Clair County
- State
- Illinois
- Latitude
- 38.6222° N
- Longitude
- 90.1752° W
What is measuring near here
The 6 instruments nearest Gateway Arch National Park, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.
measured now4 instruments
At an airfield/3.7 mi away/413 ft/4 ft below here
temp, wind, gust, visibility, precip, pressure
Citizen station GW5557GW5557
In a volunteer observer's own ground/6.2 mi away/422 ft/5 ft above here
temp, humidity, wind, precip, pressure
Rain Gage At Scott Air Force Base383209089513901
On a military installation/18.0 mi away/-/- ft from here
temp, wind, gust, humidity, pressure
measured daily2 instruments
East St. Louis 1.3 NWIL-SC-36
In a volunteer observer's own ground/1.6 mi away/423 ft/6 ft above here
precip, snowfall, snow depth
Milstadt 2SWMSTI2
At a cooperative observer's station/12.7 mi away/656 ft/239 ft above here
snowfall, snow depth, precip, high, low
What the snow tracker reads here
Every instrument in this state
-
Snow on the ground
Elsewhere in Illinois
23 places, each with its own forecast and its own instruments.
AuroracityBloomingtoncityCarbondalecityChampaigncityChicagocityDanvillecityDecaturcityElgincityGalenatownIllinois RiverfeatureJolietcityLake ShelbyvillefeatureMolinecityMount VernoncityNapervillecityPeoriacityQuincycityRockfordcityShawnee National ForestfeatureSpringfieldcityStarved RockfeatureVilla Oliviaski areaWaukegancity
Near Gateway Arch National Park
The nearest places, each with its own forecast and the instruments nearest it.
- Saugetvillage, 2 mi
- Brooklynvillage, 2 mi
- East St. Louiscity, 3 mi
- Cahokia Heightscity, 4 mi
- Venicecity, 4 mi
- Fairmont Cityvillage, 4 mi
- Madisoncity, 4 mi
- Washington Parkvillage, 4 mi
- East Carondeletvillage, 7 mi
- Granite Citycity, 7 mi
- Dupovillage, 7 mi
- Caseyvillevillage, 8 mi