Weather forecast for tomorrow
Johnston, IA

Weather forecast for tomorrow

Tuesday, Jun 17.

PM Thunderstorms
5:38 am

8:53 pm
CDT
PM Thunderstorms
82°F / 66°F
  • Wind: 6mph WSW
  • Humidity: 73%
  • Precip. probability: 50%
  • Precipitation: 0.67"
  • UV index: 7
On Tuesday, June 17, passing thunderstorms may develop after midday.
The likelihood of rainfall for tomorrow is low. However, predicted precipitation will be moderate. The highest forecasted temperature is a temperate 82.4°F, while the lowest temperature will be an enjoyable 66.2°F.
The maximum heat index, which adjusts the air temperature based on humidity, is appraised at a humid 87.8°F. Note that heat index values are valued for light wind and location in the shade.
June's standard high of 79.3°F is expected to be reached during the day.
Sunrise will be at 5:38 am and sunset at 8:53 pm; tomorrow's daylight will last for 15h and 15min.

Frequently asked questions

What is the weather forecast for Johnston for tomorrow?
On Tuesday, afternoon storms could include thunder and brief downpours.
Will it rain tomorrow?
Moderate precipitation of 0.67" is anticipated. The chance of rainfall is 50%.
What will be the maximum temperature tomorrow?
Tomorrow, the highest temperature will be 82.4°F, while the lowest temperature will be 66.2°F. The maximum heat index, which adjusts the air temperature based on humidity, is estimated at 87.8°F.
The maximum temperature will be in line with the average highest temperature of 79.3°F in June. The lowest temperature will be a couple of degrees higher than the average low of 62.4°F.
What time are sunrise and sunset tomorrow?
On Tuesday, in Johnston, sunrise will be at 5:38 am and sunset at 8:53 pm (CDT).
How many hours of daylight will Johnston have tomorrow?
In Johnston, tomorrow, there will be 15h and 15min of daylight.

Hourly weather forecast

12 am
  • 75°F
  • Feels like:
    81°F
Partly Cloudy
Partly Cloudy
  • Wind: 7mph SSW
  • Pressure: 29.74"Hg
  • Humidity: 77%
  • Precip. probability: 10%
  • Precipitation: 0"
  • Visibility: 10mi
2 am
  • 75°F
  • Feels like:
    77°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 6mph SSW
  • Pressure: 29.74"Hg
  • Humidity: 80%
  • Precip. probability: 9%
  • Precipitation: 0"
  • Visibility: 10mi
4 am
  • 72°F
  • Feels like:
    73°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 6mph SW
  • Pressure: 29.74"Hg
  • Humidity: 83%
  • Precip. probability: 7%
  • Precipitation: 0"
  • Visibility: 10mi
Sunrise: 5:38 am
6 am
  • 70°F
  • Feels like:
    72°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 6mph WSW
  • Pressure: 29.74"Hg
  • Humidity: 85%
  • Precip. probability: 8%
  • Precipitation: 0"
  • Visibility: 10mi
8 am
  • 73°F
  • Feels like:
    75°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 6mph W
  • Pressure: 29.74"Hg
  • Humidity: 85%
  • Precip. probability: 8%
  • Precipitation: 0"
  • Visibility: 9mi
10 am
  • 77°F
  • Feels like:
    81°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 6mph WNW
  • Pressure: 29.74"Hg
  • Humidity: 75%
  • Precip. probability: 6%
  • Precipitation: 0"
  • Visibility: 10mi
12 pm
  • 79°F
  • Feels like:
    82°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 6mph WSW
  • Pressure: 29.74"Hg
  • Humidity: 71%
  • Precip. probability: 13%
  • Precipitation: 0"
  • Visibility: 10mi
2 pm
  • 81°F
  • Feels like:
    84°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 6mph SW
  • Pressure: 29.74"Hg
  • Humidity: 67%
  • Precip. probability: 24%
  • Precipitation: 0"
  • Visibility: 10mi
4 pm
  • 81°F
  • Feels like:
    84°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Wind: 6mph WSW
  • Pressure: 29.71"Hg
  • Humidity: 67%
  • Precip. probability: 49%
  • Precipitation: 0.04"
  • Visibility: 7mi
6 pm
  • 81°F
  • Feels like:
    84°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Wind: 6mph SE
  • Pressure: 29.68"Hg
  • Humidity: 71%
  • Precip. probability: 45%
  • Precipitation: 0.08"
  • Visibility: 7mi
8 pm
  • 75°F
  • Feels like:
    81°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Wind: 6mph NE
  • Pressure: 29.71"Hg
  • Humidity: 78%
  • Precip. probability: 39%
  • Precipitation: 0.08"
  • Visibility: 5mi
Sunset: 8:53 pm
10 pm
  • 73°F
  • Feels like:
    75°F
Isolated Thunderstorms
Isolated Thunderstorms
  • Wind: 6mph NNE
  • Pressure: 29.74"Hg
  • Humidity: 84%
  • Precip. probability: 30%
  • Precipitation: 0.16"
  • Visibility: 4mi
Tomorrow, a combination of primarily cloudy and occasionally thunderstorm-prone and sun-filled weather is predicted.
Rainfall is anticipated from 3 pm to 11 pm. With moderate precipitation of 0.16", most rainfall is expected at 10 pm.
The temperature will be between the lowest temperature of 69.8°F and the highest temperature of 80.6°F. The warmest part of the day will be from 1 pm to 6 pm.
The maximum temperature will be in line with June's average highest temperature of 79.3°F. The nighttime low will be also relatively higher than the typical June minimum temperature of 62.4°F.
Updated: Jun 16, 2025 @ 08:37:31 UTC
Published by: Weather U.S. | About Us
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