Temperature
47 F at 4 AM; 58 F at its warmest, 2 PM Thursday, and 45 F at its coolest, 12 AM.
- Now
- 47F
- 4 AM
- Highest
- 58F
- 2 PM Thursday
- Lowest
- 45F
- 12 AM
How it is measured: Stevenson screen and siting, Field Book FB-INS-009
Marshalltown Municipal Airport, Iowa
Small airport in Marshall County, Iowa* WHAT...Sub-freezing temperatures as low as 29 expected. * WHERE...Much of central Iowa. * WHEN...From 1 AM to 9 AM CDT Saturday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Take steps now to protect tender plants from the cold.
46°
52°/40°
Overcast·
Feels like 39°·Moderate breeze 15 mph WNW
Alert. A Freeze Warning is in force for Marshalltown Municipal Airport until 9 AM tomorrow. Read the alert in full, and see what it means in the Field Book.
Now. Marshalltown Municipal Airport is 46° and overcast at 4 AM. With the wind it feels like 39°. The dew point is 41°, so the air feels dry and comfortable. Moderate breeze from the west-northwest at 15 mph, gusting to 29 mph.
Today and tonight. It warms to about 51° by 2 PM. Tonight falls to about 31° by 7 AM, under a mostly clear sky. A freeze: protect plants and pipes. No rain is expected for the rest of the day.
The week. The warmest day ahead is Thursday, near 74°, and the coolest tomorrow, near 58°. The days ahead look dry. The first freeze could come tomorrow, a low of 31°.
The sky tonight. The sun sets at 6:29 PM. The Moon is a waxing crescent, 33% lit, and sets at 10:19 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 5 minutes long, 3 minutes shorter than yesterday.
0UV Low
37Air quality
80%Humidity
100%Cloud
Now
4:00 AM
46feels39
15mph
Today
Oct 16
5240
21%
25mph
Sat
Oct 17
5831
14mph
Sun
Oct 18
6438
17mph
Mon
Oct 19
6641
overcast
Tue
Oct 20
7043
overcast
Wed
Oct 21
7348
overcast
Thu
Oct 22
7454
overcast
46°
52°40°
58°31°
64°38°
66°41°
70°43°
73°48°
74°54°
As of 4:00 AM in Marshalltown Municipal Airport, Iowa.
Air quality
The air at Marshalltown Municipal Airport
Index 37, good, led by fine particles. Read at 4 AM from its reporting area, Waterloo (IA), 38 miles off.
37Good
- Fine particles (PM2.5)37Good-
The days ahead
Good each day through Today, led by ozone. Yesterday measured 21, good.
GoodModerate
- 21YesterdayOct 15
- 23TodayOct 16
Smoke, the next 46 hours
No smoke near the ground through Sun 1 AM.
Precipitation
What has fallen at Marshalltown Municipal Airport
0.83 in in the last 24 hours, 0.84 in over the last 3 days, to Fri 3 AM. Measured by radar and rain gauges, as water.
- Last 24 hours
- 0.83in
- Last 3 days
- 0.84in
3 days agoLast 24 hours 99%
Visibility
How far you can see at Marshalltown Municipal Airport, the next 46 hours
Visibility stays 7 miles or more through Sun 1 AM, lowest 8 miles Sat 2 AM.
F
Now, today, and the week
Weather instrument stations by state
Airfield
- Code
- MIW
- ICAO
- KMIW
- IATA
- MIW
- Field elevation
- 974 ft
- Serves
- Marshalltown
- Kind
- Small airport
- Scheduled service
- No
- Its own instrument
- MIW
- Wind now
- From 290° at 15 mph, read 16 Oct, 03:53
Runways
| Runway | Length | Width | Surface | Heading, true | Wind along it now | Crosswind now |
|---|---|---|---|---|---|---|
| 13 / 31 | 5,007 ft | 100 ft | Asphalt | 127° / 307° | 14 mph head, on 31 | 4 mph from the left |
| 18 / 36 | 2,759 ft | 50 ft | Asphalt | 183° / 3° | 4 mph head, on 36 | 14 mph from the left |
Measured here
What the airfield's own instrument measured, the last 24 hours
Every hour from Marshalltown (MIW), Marshalltown Municipal Airport's own instrument, measure by measure, on the field's own clock.
Humidity and dew point
A dew point of 41 F, the air 80% saturated; the humidity ran from 76% at 10 PM Thursday to 99% at 5 AM Thursday.
- Dew point now
- 41F
- 4 AM
- Humidity now
- 80%
- Humidity, range
- 76 to 99%
How it is measured: Humidity variables, Field Book FB-WAT-002
Wind
17 mph from the west northwest at 4 AM; at its strongest 23 mph, 4 PM Thursday, with a gust of 37 mph at 4 PM Thursday.
- Now
- 17mph
- from the west northwest
- Strongest
- 23mph
- 4 PM Thursday
- Highest gust
- 37mph
- 4 PM Thursday
How it is measured: Coriolis as geometry, Field Book FB-ENG-008
Pressure
30.14 inHg at 4 AM, rising 0.03 inHg over 3 hours; 0.11 inHg higher than a day before.
- Now
- 30.14inHg
- 4 AM
- 3 hours
- +0.03inHg
- rising
- 24 hours
- +0.11inHg
How it is measured: Hydrostatic balance, Field Book FB-ENG-003
Visibility
Down to 1 mile at 1 PM Thursday; 10 miles or more now.
- Now
- 10+mi
- Lowest
- 1mi
- 1 PM Thursday
- Hours under a mile
- 0
How it is measured: Fog types, Field Book FB-WAT-020
Cloud base
The lowest cloud base came down to 300 ft at 12 PM Thursday; a base was reported in 23 of the hours.
- Lowest base now
- 2,700ft
- Lowest in 24 hours
- 300ft
- 12 PM Thursday
- Hours with a base reported
- 23
How it is measured: Cloud classification, Field Book FB-SKY-001
Precipitation
0.81 in measured in the gauge, the most, 0.18 in, in the hour to 8 AM Thursday.
- Last 24 hours
- 0.81in
- Wettest hour
- 0.18in
- 8 AM Thursday
- Hours with some
- 13
How it is measured: ASOS, Field Book FB-INS-002
Marshalltown: every reading, the last 7 days, 30 days and the year, and how well it reports
What is measuring near here
The 4 instruments nearest Marshalltown Municipal Airport, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.
measured now2 instruments
MarshalltownMIW
At an airfield/0.2 mi away/974 ft/level with here
temp, wind, gust, visibility, precip, pressure
Marshalltown (US 30)RMTI4
Beside a road/7.9 mi away/955 ft/19 ft below here
temp, pavement temp, wind, visibility, precip
measured daily2 instruments
MarshalltownMSHI4
At a cooperative observer's station/3.3 mi away/899 ft/75 ft below here
snowfall, snow depth, precip, high, low
Marshalltown 0.2 WSWIA-MS-7
In a volunteer observer's own ground/5.4 mi away/909 ft/65 ft below here
precip, snowfall, snow depth
What the snow tracker reads here
Every instrument in this state
-
Snow on the ground
Elsewhere in Iowa
15 places, each with its own forecast and its own instruments.
Near Marshalltown Municipal Airport
The nearest places, each with its own forecast and the instruments nearest it.
Airports near Marshalltown Municipal Airport
- Grinnell Regional AirportGGI, 29 mi
- Iowa Falls Municipal AirportIFA, 31 mi
- Newton Municipal AirportTNU, 31 mi
- Ames Municipal AirportAMW, 37 mi
- Waterloo Regional AirportALO, 41 mi
- Ankeny Regional AirportIKV, 44 mi
- Hampton Municipal AirportHPT, 45 mi
- Vinton Veterans Memorial AirparkVTI, 46 mi