weathermetro
Cities / United States
/ Iowa
☀️ Johnston weather
Clear sky. .
Feels like 26° Wind 13 km/h NW Humidity 78% Pressure 1019 hPa UV 6 Air Good ☀ 06:30 - 20:04
Right now it is 23° in Johnston with clear skies, it feels more like 26° and today's high is 27° with an overnight low of 17° . The sun rises at 06:30 and sets at 20:04, giving 13h 34m of daylight. Over the coming week highs range from 27° to 36° .
Johnston is in Iowa, United States, sitting 253 m above sea level, with a population of about 21,000. Local time is America/Chicago (UTC−5), and every time on this page is shown in it.
Next 24 hours - temperature
15°
21°
27°
27°
15°
10:00 · 22.8° · 0 mm
11:00 · 24° · 0 mm
12:00 · 25.1° · 0 mm
13:00 · 26° · 0 mm
14:00 · 26.5° · 0 mm
15:00 · 26.7° · 0 mm
16:00 · 26.7° · 0 mm
17:00 · 26.3° · 0 mm
18:00 · 25.2° · 0 mm
19:00 · 24° · 0 mm
20:00 · 22.4° · 0 mm
21:00 · 20.9° · 0 mm
22:00 · 19.9° · 0 mm
23:00 · 19.2° · 0 mm
00:00 · 18.5° · 0 mm
01:00 · 18° · 0 mm
02:00 · 17.6° · 0 mm
03:00 · 17.1° · 0 mm
04:00 · 16.4° · 0 mm
05:00 · 15.9° · 0 mm
06:00 · 15.6° · 0 mm
07:00 · 15.2° · 0 mm
08:00 · 16.5° · 0 mm
09:00 · 19.2° · 0 mm
Precipitation
10:00 · 0 mm
10:00
11:00 · 0 mm
12:00 · 0 mm
13:00 · 0 mm
13:00
14:00 · 0 mm
15:00 · 0 mm
16:00 · 0 mm
16:00
17:00 · 0 mm
18:00 · 0 mm
19:00 · 0 mm
19:00
20:00 · 0 mm
21:00 · 0 mm
22:00 · 0 mm
22:00
23:00 · 0 mm
00:00 · 0 mm
01:00 · 0 mm
01:00
02:00 · 0 mm
03:00 · 0 mm
04:00 · 0 mm
04:00
05:00 · 0 mm
06:00 · 0 mm
07:00 · 0 mm
07:00
08:00 · 0 mm
09:00 · 0 mm
Hour by hour
TIME TEMP FEELS RAIN CONDITIONS
10:00
☀️
22.8°
24°
-
Clear sky
11:00
☀️
24°
24.5°
-
Clear sky
12:00
☀️
25.1°
25.7°
-
Clear sky
13:00
☀️
26°
26.1°
-
Clear sky
14:00
☀️
26.5°
26.7°
-
Clear sky
15:00
☀️
26.7°
26.5°
-
Clear sky
16:00
☀️
26.7°
26.3°
-
Clear sky
17:00
🌤️
26.3°
26°
-
Mostly clear
18:00
☀️
25.2°
25.6°
-
Clear sky
19:00
☀️
24°
25.1°
-
Clear sky
20:00
☀️
22.4°
23.8°
-
Clear sky
21:00
☀️
20.9°
21.9°
-
Clear sky
☀️
TodayAugust 22nd
Avg 22° Low 17° at 07:00
High 27° at 15:00
Wind ~15 km/h
Clear
00:00
20°
02:00
19°
04:00
18°
06:00
17°
08:00
19°
10:00
23°
12:00
25°
14:00
27°
16:00
27°
18:00
25°
20:00
22°
22:00
20°
☁️
SundayAugust 23rd
Avg 21° Low 15° at 07:00
High 27° at 17:00
Wind ~7 km/h
Clear
Cloudy
Clear
Cloudy
00:00
19°
02:00
18°
04:00
16°
06:00
16°
08:00
17°
10:00
21°
12:00
24°
14:00
26°
16:00
27°
18:00
26°
20:00
23°
22:00
22°
🌦️
MondayAugust 24th
Avg 22° Low 18° at 07:00
High 29° at 17:00
0.5 mm rain Feels 26° Wind ~23 km/h
Cloudy
Cloudy
Cloudy
Clear
00:00
21°
02:00
19°
04:00
19°
06:00
19°
08:00
18°
10:00
18°
12:00
24°
14:00
27°
16:00
29°
18:00
29°
20:00
23°
22:00
23°
🌧️
TuesdayAugust 25th
Avg 26° Low 18° at 05:00
High 36° at 16:00
4.7 mm rain Wind ~18 km/h
Cloudy
Rain
Clear
Clear
00:00
22°
02:00
22°
04:00
18°
0.4mm
06:00
18°
0.7mm
08:00
19°
10:00
24°
12:00
31°
14:00
34°
16:00
36°
18:00
35°
20:00
29°
22:00
25°
0.3mm
🌦️
WednesdayAugust 26th
Avg 24° Low 19° at 06:00
High 31° at 15:00
0.8 mm rain Feels 28° Wind ~23 km/h
Rain
Clear
00:00
21°
0.2mm
02:00
20°
0.1mm
04:00
19°
06:00
19°
08:00
20°
10:00
24°
12:00
29°
14:00
31°
16:00
31°
18:00
30°
20:00
24°
22:00
22°
☀️
ThursdayAugust 27th
Avg 22° Low 15° at 07:00
High 29° at 16:00
Wind ~14 km/h
Clear
00:00
20°
02:00
20°
04:00
18°
06:00
16°
08:00
17°
10:00
23°
12:00
26°
14:00
29°
16:00
29°
18:00
28°
20:00
24°
22:00
20°
☁️
FridayAugust 28th
Avg 22° Low 17° at 06:00
High 28° at 13:00
Feels 25° Wind ~15 km/h
Partly Cloudy
Cloudy
Partly Cloudy
Cloudy
00:00
19°
02:00
18°
04:00
18°
06:00
17°
08:00
19°
10:00
25°
12:00
28°
14:00
27°
16:00
25°
18:00
25°
20:00
24°
22:00
21°
🌦️
SaturdayAugust 29th
Avg 21° Low 18° at 07:00
High 27° at 13:00
4.2 mm rain Feels 24° Wind ~27 km/h
Cloudy
Rain
Cloudy
Rain
00:00
21°
02:00
21°
04:00
21°
06:00
18°
0.3mm
08:00
18°
10:00
21°
12:00
26°
0.2mm
14:00
27°
0.4mm
16:00
24°
0.4mm
18:00
22°
0.4mm
20:00
20°
0.1mm
22:00
18°
0.1mm
🌧️
SundayAugust 30th
Avg 20° Low 16° at 05:00
High 24° at 16:00
7.5 mm rain Wind ~27 km/h
Clear
Rain
Cloudy
Rain
00:00
17°
02:00
17°
04:00
16°
06:00
16°
0.3mm
08:00
17°
0.1mm
10:00
19°
0.1mm
12:00
20°
1.4mm
14:00
22°
16:00
24°
18:00
24°
0.1mm
20:00
22°
22:00
20°
🌧️
MondayAugust 31st
Avg 23° Low 17° at 07:00
High 30° at 15:00
4.2 mm rain Feels 24° Wind ~33 km/h
Rain
Clear
00:00
20°
1.8mm
02:00
20°
0.2mm
04:00
20°
0.2mm
06:00
18°
08:00
19°
10:00
23°
12:00
27°
14:00
29°
16:00
30°
18:00
28°
20:00
24°
22:00
20°
☀️
TuesdaySeptember 1st
Avg 20° Low 15° at 06:00
High 25° at 16:00
Feels 22° Wind ~23 km/h
Clear
Clear
00:00
19°
02:00
18°
04:00
17°
06:00
15°
08:00
17°
10:00
22°
12:00
24°
14:00
25°
16:00
25°
18:00
24°
20:00
22°
22:00
18°
☀️
WednesdaySeptember 2nd
Avg 20° Low 14° at 06:00
High 28° at 16:00
Wind ~15 km/h
Clear
00:00
16°
02:00
16°
04:00
15°
06:00
14°
08:00
16°
10:00
21°
12:00
25°
14:00
27°
16:00
28°
18:00
26°
20:00
22°
22:00
18°
☁️
ThursdaySeptember 3rd
Avg 22° Low 15° at 06:00
High 31° at 16:00
Wind ~14 km/h
Clear
Partly Cloudy
Cloudy
Clear
00:00
16°
02:00
15°
04:00
15°
06:00
15°
08:00
17°
10:00
22°
12:00
26°
14:00
29°
16:00
31°
18:00
29°
20:00
26°
22:00
21°
🌦️
FridaySeptember 4th
Avg 24° Low 17° at 06:00
High 33° at 15:00
2.4 mm rain Wind ~12 km/h
Rain
Clear
Rain
00:00
19°
02:00
18°
0.3mm
04:00
18°
0.3mm
06:00
17°
0.1mm
08:00
19°
0.3mm
10:00
23°
0.3mm
12:00
29°
14:00
32°
16:00
33°
18:00
31°
20:00
28°
0.1mm
22:00
25°
0.1mm
⛅
SaturdaySeptember 5th
Avg 21° Low 17° at 07:00
High 29° at 16:00
Feels 26° Wind ~19 km/h
Clear
Cloudy
Clear
Partly Cloudy
00:00
21°
02:00
19°
04:00
18°
06:00
17°
08:00
17°
10:00
18°
12:00
24°
14:00
27°
16:00
29°
18:00
27°
20:00
23°
22:00
18°
🌦️
SundaySeptember 6th
Avg 21° Low 15° at 06:00
High 30° at 15:00
0.6 mm rain Wind ~20 km/h
Clear
Cloudy
Rain
Cloudy
00:00
16°
02:00
16°
04:00
16°
06:00
15°
08:00
17°
10:00
21°
12:00
26°
14:00
29°
16:00
30°
18:00
26°
0.2mm
20:00
22°
22:00
21°
Sun
☀️ Sunrise 06:30 · Sunset 20:04
13h 34m of daylight · America/Chicago
Air quality
PM2.5 7.1 µg/m³ - Good
No reason to change your plans - open the windows.
Source: Copernicus CAMS, updated hourly.
Common questions about Johnston weather
Will it rain in Johnston today?
No rain is in the forecast for Johnston today.
What is the temperature in Johnston right now?
It is 23° in Johnston right now, though it feels closer to 26° . Today runs between a low of 17° and a high of 27° .
What time is sunrise and sunset in Johnston?
The sun rises at 06:30 and sets at 20:04 local time in Johnston today, giving 13h 34m of daylight.
What is the air quality in Johnston?
PM2.5 in Johnston is currently 7.1 µg/m³, which counts as Good on the European air-quality index. No reason to change your plans - open the windows.
How accurate is the Johnston forecast, and how far ahead does it go?
This page shows 16 days ahead, refreshed every hour. It blends ECMWF, NOAA GFS and whichever national high-resolution model covers Johnston best. The first three days are the dependable part - day one is usually within a degree or two - and accuracy falls off steadily after day five, so read the far end as a trend rather than a plan. We publish our measured error against real station observations on the accuracy page.
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© 2026 WeatherMetro · Weather data: ECMWF, NOAA, DWD, Météo-France, ECCC, MeteoSwiss and others (CC-BY 4.0) · Air quality & history: Copernicus CAMS / C3S · Location data: GeoNames (CC-BY) · Alerts: NWS, MeteoAlarm, ECCC