Weather in Johnston

United States · Iowa · 41.6730, -93.6977

Today Now 2:00 AM

+52° Mostly clear

Hourly forecast

Today10/21 Temperature°F Cloudiness Precipitation Windmph Wind gusts Humidity PressureinHg Dew point°F Visibilitymi UV index
Hourly forecast — Johnston

Forecast in words

Today

During the day mostly clear, up to +73°, at night around +52°. Light wind, up to 6 mph. No rain expected.

Tomorrow

Tomorrow high +73° and mostly clear, nighttime low +52°, weather holds steady.

Week

Seven days ahead fall within +34°…+75°. Weekly maximum — +75° (Sat). Coldest at night — Tue, +34°. Days with precipitation — Mon. Cloudless weather for 5 days. It cools down by the end of the week.

Week vs norm

  1. Today 10/21 +73° +11° usually +62°
  2. Tomorrow 10/22 +73° +12° usually +62°
  3. Fri 10/23 +73° +12° usually +61°
  4. Sat 10/24 +75° +15° usually +61°
  5. Sun 10/25 +70° +10° usually +60°
  6. Mon 10/26 +57° −2° usually +60°
  7. Tue 10/27 +46° −13° usually +59°
  8. Wed 10/28 +34° −25° usually +59°

Difference between forecast daytime high and the 1991–2020 norm for this date.

This day, October 21

Today is warmer than usual for this date.

  • Heat record +80° 2022
  • Cold record +27° 2011
  • Most precipitation 1.0 in 2019
  • Strongest gust 44 mph 2017

Records for this calendar date, 1991-2024, ERA5 reanalysis.

Climate in Johnston

Today is about 8° warmer than usual for October.

Climate normals by month, Johnston
Month Daytime / Nighttime Average Precipitation in
Jan +30° / +14° +21° 1.3
Feb +35° / +18° +25° 1.5
Mar +49° / +30° +38° 2.8
Apr +62° / +41° +50° 4.3
May +73° / +53° +62° 5.6
Jun +82° / +63° +72° 4.9
Jul +85° / +67° +75° 4.0
Aug +84° / +65° +74° 3.8
Sep +78° / +57° +67° 3.3
Oct +65° / +45° +54° 3.0
Nov +49° / +32° +40° 2.1
Dec +36° / +21° +27° 1.7

Climatic normals for 1991–2025 years from ERA5-Land reanalysis.

Astronomical data

Sunrise / sunset 7:34 AM | 6:23 PM
Moon 4:11 PM | 2:28 AM
Moon phase Waxing gibbous 78%
Next solar eclipse
Calculating for this city…

Weather in the region