Johnston Weather History Iowa, United States of America

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Daily and hourly data from 1 Jan 2009 onwards.
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Sat 08 Nov, 2025 Weather in Johnston

Sunrise: 06:56 AM Sunset: 05:01 PM	Moonrise: 07:37 PM Moonset: 11:01 AM	Max: 5.9 °c	Min: 2.6 °c	Avg: 3.9 °c	Precip: 18.00 mm	Max Wind: 23.8 kph

	Sat 08 0:00 am	Sat 08 3:00 am	Sat 08 6:00 am	Sat 08 9:00 am	Sat 08 12:00 pm	Sat 08 3:00 pm	Sat 08 6:00 pm	Sat 08 9:00 pm
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Temp	5.9°c	3.4°c	2.6°c	4.0°c	3.2°c	3.9°c	4.5°c	4.4°c
Wind	10.4 kmph	7.6 kmph	10.1 kmph	12.2 kmph	19.1 kmph	16.2 kmph	18.7 kmph	23.0 kmph
Precip	0.00 mm	0.00 mm	0.00 mm	0.00 mm	3.00 mm	2.50 mm	0.50 mm	0.00 mm
Cloud	43%	17%	77%	100%	100%	100%	83%	40%
Humidity	73%	83%	89%	82%	89%	88%	89%	92%
Pressure	1012 mb	1012 mb	1012 mb	1012 mb	1012 mb	1012 mb	1014 mb	1015 mb

Johnston Annual Weather Averages

Month	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
January	-2°C / 29°F	-10°C / 14°F	-6°C / 21°F	136 hours	32.92 mm / 1.30 In	6 days	1021 mb / 31 In
February	1°C / 33°F	-8°C / 17°F	-4°C / 25°F	146 hours	33.89 mm / 1.33 In	5 days	1021 mb / 31 In
March	9°C / 49°F	0°C / 32°F	4°C / 40°F	150 hours	94.76 mm / 3.73 In	7 days	1017 mb / 31 In
April	15°C / 60°F	5°C / 41°F	10°C / 50°F	161 hours	125.84 mm / 4.95 In	8 days	1013 mb / 30 In
May	21°C / 70°F	11°C / 52°F	16°C / 61°F	177 hours	158.25 mm / 6.23 In	10 days	1014 mb / 30 In
June	27°C / 81°F	17°C / 63°F	22°C / 72°F	207 hours	171.16 mm / 6.74 In	8 days	1012 mb / 30 In
July	29°C / 84°F	19°C / 66°F	24°C / 75°F	241 hours	97.87 mm / 3.85 In	6 days	1014 mb / 30 In
August	29°C / 83°F	17°C / 63°F	23°C / 73°F	236 hours	125.47 mm / 4.94 In	6 days	1014 mb / 30 In
September	26°C / 78°F	14°C / 57°F	20°C / 67°F	248 hours	101.90 mm / 4.01 In	6 days	1016 mb / 30 In
October	17°C / 63°F	7°C / 45°F	12°C / 54°F	212 hours	93.68 mm / 3.69 In	5 days	1016 mb / 30 In
November	9°C / 49°F	1°C / 33°F	5°C / 40°F	203 hours	54.58 mm / 2.15 In	5 days	1019 mb / 31 In
December	2°C / 36°F	-5°C / 23°F	-2°C / 29°F	172 hours	51.40 mm / 2.02 In	6 days	1019 mb / 31 In

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