Temperature
61 F at 2 AM; 82 F at its warmest, 4 PM Thursday, and 61 F at its coolest, 2 AM.
- Now
- 61F
- 2 AM
- Highest
- 82F
- 4 PM Thursday
- Lowest
- 61F
- 2 AM
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
Now. Mount Vernon Outland Airport is 61° and overcast at 2 AM. The dew point is 55°, so the air feels a little humid. Gentle breeze from the northwest at 9 mph.
Today and tonight. The warmest of the day has passed; it cools to about 50° by 8 PM. Tonight falls to about 39° by 7 AM, under a mostly clear sky.
The week. The warmest day ahead is Thursday, near 79°, and the coolest tomorrow, near 61°. The days ahead look dry. The first freeze could come Sunday, a low of 31°.
The sky tonight. The sun sets at 6:16 PM. The Moon is a waxing crescent, 33% lit, and sets at 10:17 PM. The next full Moon is Sunday, Oct 25. After dark, look for Saturn, bright in the east-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 12 minutes long, 3 minutes shorter than yesterday.
As of 2:00 AM in Mount Vernon Outland Airport, Illinois.
Air quality
Index 15, good, led by ozone. Read at 1 AM from its reporting area, Farrar (MO), 62 miles off.
No smoke near the ground through Sat 7 PM.
Precipitation
0.08 in in the last 24 hours, 1.50 in over the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.
Visibility
Visibility stays 9 miles or more through Sat 7 PM, lowest 9 miles Fri 2 AM.
F
Now, today, and the week
| Runway | Length | Width | Surface | Heading, true | Wind along it now | Crosswind now |
|---|---|---|---|---|---|---|
| 05 / 23 | 6,496 ft | 150 ft | Asphalt | 50° / 230° | - | - |
| 15 / 33 | 3,146 ft | 100 ft | Asphalt | 150° / 330° | - | - |
Measured here
Every hour from Mount Vernon (MVN), Mount Vernon Outland Airport's own instrument, measure by measure, on the field's own clock.
61 F at 2 AM; 82 F at its warmest, 4 PM Thursday, and 61 F at its coolest, 2 AM.
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
A dew point of 55 F, the air 82% saturated; the humidity ran from 77% at 4 PM Thursday to 100% at 4 AM Thursday.
How it is measured: Humidity variables, Field Book FB-WAT-002
7 mph at 2 AM; at its strongest 10 mph, 12 AM, with a gust of 24 mph at 1 AM.
How it is measured: Coriolis as geometry, Field Book FB-ENG-008
30.03 inHg at 2 AM, rising 0.09 inHg over 3 hours; 0.03 inHg lower than a day before.
How it is measured: Hydrostatic balance, Field Book FB-ENG-003
Down to 0.3 miles at 7 AM Thursday, under a mile for 3 hours; 10 miles or more now.
How it is measured: Fog types, Field Book FB-WAT-020
The lowest cloud base came down to 200 ft at 5 AM Thursday; a base was reported in 23 of the hours.
How it is measured: Cloud classification, Field Book FB-SKY-001
0.03 in measured in the gauge, the most, 0.01 in, in the hour to 9 AM Thursday.
How it is measured: ASOS, Field Book FB-INS-002
Mount Vernon: every reading, the last 7 days, 30 days and the year, and how well it reports
The 5 instruments nearest Mount Vernon Outland Airport, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.1 miles away.
measured now3 instruments
Mount VernonMVN
At an airfield/0.1 mi away/479 ft/1 ft below here
temp, wind, gust, visibility, precip, pressure
Casey Fork Subimpoundment AT BonnieBONI2
At a river or reservoir gauge/10.0 mi away/404 ft/76 ft below here
temp, wind, gust, humidity, pressure
US 50 at GreendaleMX9208
Beside a road/22.9 mi away/-/- ft from here
temp, pavement temp, wind, visibility, precip
measured daily2 instruments
Mount Vernon 2.2 ESEIL-JF-15
In a volunteer observer's own ground/1.2 mi away/454 ft/26 ft below here
precip, snowfall, snow depth
WaltonvilleWLTI2
At a cooperative observer's station/11.5 mi away/443 ft/37 ft below here
snowfall, snow depth, precip, high, low
0in
Snow on the ground
Measured at Waltonville (WLTI2), 11.5 miles from here, read 15 Oct, 14:00. measured daily
23 places, each with its own forecast and its own instruments.
The nearest places, each with its own forecast and the instruments nearest it.