Johnston, IA Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Mostly Clear 2°F
Feels Like 2°F  
Humidity 79% Dew Point -3°F Wind Calm Barometer 30.38 in.
Report from a MADIS/MESONET weather station 2.1 mi. SSW of central Johnston
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Point Forecast at a Glance

WedDec 3
Wed Dec 3: Mostly Clear, Low -11F
 
-11
ThuDec 4
Thu Dec 4: Sunny, High 12F, Low 16F
12
16
FriDec 5
Fri Dec 5: Partly Sunny, High 31F, Low 20F
31
20
SatDec 6
Sat Dec 6: Snow, High 28F, Low 9F
20%
28
9
SunDec 7
Sun Dec 7: Partly Sunny, High 19F, Low -1F
19
-1
MonDec 8
Mon Dec 8: Partly Sunny, High 28F, Low 19F
28
19
TueDec 9
Tue Dec 9: Partly Sunny, High 35F, Low 26F
35
26

7-Day Temperature Trend

Week Ahead Summary

High temperatures climb from 12°F to a high of 35°F by week's end. Mostly dry conditions with only one day showing snow chances.

Climate Context

This week's forecast shows temperatures running 8°F below the historical average for December. Normal highs for this period are around 35°F with lows around 17°F.

This Date in Weather History

1838 - Cleveland Abbe, an American meteorologist and advocate of time zones, was born on this day. He was trained as an astronomer and appointed the director of the Cincinnati Observatory in 1868. He eventually turned to meteorology and inaugurated a public weather service that served as a model for today's National Weather Service.

More on this and other weather history

Johnston, IA 7 Day Weather Forecast Details

Wednesday Dec 3

Mostly Clear

Night: Mostly clear, with a low around -11. Northwest wind around 6 mph becoming calm.

Thursday Dec 4

Sunny

Day: Sunny, with a high near 12. Wind chill values as low as -10. Calm wind becoming south 5 to 8 mph in the afternoon.

Mostly Clear

Night: Mostly clear, with a temperature rising to around 16 by 2am. Wind chill values as low as -5. South southwest wind 7 to 9 mph.

Friday Dec 5

Partly Sunny

Day: Partly sunny, with a high near 31. Wind chill values as low as 5. West southwest wind around 7 mph.

Mostly Cloudy

Night: Mostly cloudy, with a low around 20. West wind around 6 mph becoming calm in the evening.

Saturday Dec 6

Snow

Day: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 28.

Snow

Night: A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 9.

Sunday Dec 7

Partly Sunny

Day: Partly sunny, with a high near 19.

Mostly Cloudy

Night: Mostly cloudy, with a low around -1.

Monday Dec 8

Partly Sunny

Day: Partly sunny, with a high near 28.

Partly Cloudy

Night: Partly cloudy, with a low around 19.

Tuesday Dec 9

Partly Sunny

Day: Partly sunny, with a high near 35.

Mostly Cloudy

Night: Mostly cloudy, with a low around 26.

Wednesday Dec 10

Partly Sunny

Day: Partly sunny, with a high near 36.


About Johnston, IA

Johnston is a city in Polk County, Iowa, United States. The population was 24,064 in the 2020 census, a large increase from the 8,649 population in 2000. It is part of the Des Moines–West Des Moines Metropolitan Statistical Area. Johnston is the location of the headquarters of Pioneer Hi-Bred Seeds, Iowa Public Television, and The Gardeners of America/Men's Garden Clubs of America. Also located here are the Camp Dodge Military Reservation as well as the Paul J. and Ida Trier House, a private residence designed by architect Frank Lloyd Wright, and the Des Moines Weather Forecast Office of the National Weather Service.

Content from Wikipedia, licensed under CC BY-SA 3.0.

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Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.