10-day forecast for Johnston, IA: 41° to 72°, with precipitation expected on 8 days. The table below breaks each day into morning, afternoon, evening and overnight.
66°
Best day: Monday, October 26
55° · 1.85 in
Worst day: Tuesday, November 3
Tap any day below to see morning, afternoon, evening and overnight.
Tue, 2767° / 56°0.06
Morning58°feels 58°
Afternoon67°feels 67°
Evening59°feels 58°
Overnight59°feels 58°
67 °
Johnston, Tuesday, 27 October
Light rain. High 67°, low 56°.
Pressure30.12 inHg
Wind7.8 mph S
Humidity94%
Visibility3.2 mi
Dew point57°
Wed, 2872° / 52°0.33
Morning56°feels 56°
Afternoon72°feels 71°
Evening63°feels 63°
Overnight53°feels 52°
72 °
Johnston, Wednesday, 28 October
Rain. High 72°, low 52°.
Pressure30.03 inHg
Wind11 mph S
Humidity68%
Visibility6.2 mi
Dew point57°
Thu, 2967° / 55°0.48
Morning60°feels 60°
Afternoon66°feels 65°
Evening57°feels 56°
Overnight60°feels 60°
67 °
Johnston, Thursday, 29 October
Heavy rain. High 67°, low 55°.
Pressure30.15 inHg
Wind6.4 mph N
Humidity75%
Visibility6.2 mi
Dew point55°
Fri, 3066° / 51°0.22
Morning53°feels 52°
Afternoon65°feels 65°
Evening63°feels 63°
Overnight52°feels 51°
66 °
Johnston, Friday, 30 October
Rain. High 66°, low 51°.
Pressure30.15 inHg
Wind8.4 mph SE
Humidity82%
Visibility6.2 mi
Dew point56°
Sat, 3163° / 57°0.3
Morning59°feels 59°
Afternoon62°feels 62°
Evening58°feels 58°
Overnight58°feels 58°
63 °
Johnston, Saturday, 31 October
Rain. High 63°, low 57°.
Pressure30.09 inHg
Wind6.8 mph SE
Humidity89%
Visibility—
Dew point59°
Sun, 0165° / 57°0.07
Morning59°feels 59°
Afternoon64°feels 64°
Evening62°feels 61°
Overnight60°feels 60°
65 °
Johnston, Sunday, 1 November
Light rain. High 65°, low 57°.
Pressure30.00 inHg
Wind6.4 mph NE
Humidity72%
Visibility—
Dew point55°
Mon, 0260° / 54°1.33
Morning56°feels 55°
Afternoon55°feels 55°
Evening54°feels 54°
Overnight55°feels 54°
60 °
Johnston, Monday, 2 November
Heavy rain. High 60°, low 54°.
Pressure29.80 inHg
Wind19.9 mph NE
Humidity92%
Visibility—
Dew point53°
Tue, 0355° / 44°1.85
Morning54°feels 53°
Afternoon51°feels 49°
Evening46°feels 37°
Overnight46°feels 38°
55 °
Johnston, Tuesday, 3 November
Rain. High 55°, low 44°.
Pressure29.50 inHg
Wind30.8 mph NE
Humidity90%
Visibility—
Dew point49°
Wed, 0447° / 41°0.01
Morning42°feels 35°
Afternoon45°feels 38°
Evening44°feels 38°
Overnight43°feels 37°
47 °
Johnston, Wednesday, 4 November
Light rain. High 47°, low 41°.
Pressure30.15 inHg
Wind20.3 mph NE
Humidity69%
Visibility—
Dew point35°
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.