10-day forecast for Johnston, IA: 36° to 75°, with precipitation expected on 1 day. The table below breaks each day into morning, afternoon, evening and overnight.
75°
Best day: Thursday, October 22
58° · 0.46 in
Worst day: Thursday, October 15
Tap any day below to see morning, afternoon, evening and overnight.
Thu, 1558° / 52°0.46
Morning58°feels 57°
Afternoon58°feels 58°
Evening53°feels 52°
Overnight56°feels 56°
58 °
Johnston, Thursday, 15 October
Rain. High 58°, low 52°.
Pressure30.03 inHg
Wind5.3 mph NW
Humidity98%
Visibility1.4 mi
Dew point57°
Fri, 1652° / 42°0.01
Morning48°feels 42°
Afternoon52°feels 49°
Evening46°feels 42°
Overnight48°feels 42°
52 °
Johnston, Friday, 16 October
Light rain. High 52°, low 42°.
Pressure30.42 inHg
Wind21.3 mph N
Humidity56%
Visibility6.2 mi
Dew point35°
Sat, 1757° / 36°0
Morning37°feels 37°
Afternoon56°feels 54°
Evening49°feels 46°
Overnight40°feels 37°
57 °
Johnston, Saturday, 17 October
Clear. High 57°, low 36°.
Pressure30.56 inHg
Wind8.9 mph SW
Humidity48%
Visibility6.2 mi
Dew point34°
Sun, 1862° / 43°0
Morning45°feels 40°
Afternoon60°feels 58°
Evening54°feels 52°
Overnight45°feels 40°
62 °
Johnston, Sunday, 18 October
Clear. High 62°, low 43°.
Pressure30.33 inHg
Wind11.6 mph S
Humidity58%
Visibility6.2 mi
Dew point41°
Mon, 1961° / 45°0
Morning50°feels 47°
Afternoon60°feels 59°
Evening55°feels 54°
Overnight50°feels 49°
61 °
Johnston, Monday, 19 October
Overcast. High 61°, low 45°.
Pressure30.30 inHg
Wind8.4 mph S
Humidity61%
Visibility—
Dew point45°
Tue, 2067° / 47°0
Morning53°feels 51°
Afternoon63°feels 62°
Evening58°feels 57°
Overnight55°feels 53°
67 °
Johnston, Tuesday, 20 October
Clear. High 67°, low 47°.
Pressure30.27 inHg
Wind10.2 mph S
Humidity59%
Visibility—
Dew point47°
Wed, 2165° / 53°0
Morning57°feels 56°
Afternoon64°feels 64°
Evening64°feels 64°
Overnight61°feels 61°
65 °
Johnston, Wednesday, 21 October
Overcast. High 65°, low 53°.
Pressure30.18 inHg
Wind13.7 mph S
Humidity70%
Visibility—
Dew point53°
Thu, 2275° / 60°0
Morning65°feels 64°
Afternoon74°feels 73°
Evening70°feels 70°
Overnight68°feels 68°
75 °
Johnston, Thursday, 22 October
Overcast. High 75°, low 60°.
Pressure30.00 inHg
Wind18.5 mph S
Humidity53%
Visibility—
Dew point54°
Fri, 2371° / 58°0.02
Morning69°feels 68°
Afternoon70°feels 69°
Evening61°feels 60°
Overnight60°feels 59°
71 °
Johnston, Friday, 23 October
Light rain. High 71°, low 58°.
Pressure29.83 inHg
Wind23.8 mph S
Humidity47%
Visibility—
Dew point50°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Johnston, IA around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.