Johnston, IA Current Weather Conditions

Current weather observations and 72-hour history for Johnston, IA. • View 5-Day Forecast ›

▼Current Conditions — Johnston, IA

AMES (KAMW)

Clear

66.2 F

Humidity:	78%
Wind Speed:	SE 8.1 mph
Barometer:	29.78 in
Dewpoint:	59.0 F
Visibility:	10.00 mi
Precip:	--
Heat Index:	NA
Wind Chill:	NA

May 17 2026, 01:00 AM CDT

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▼Hourly Observation History — Johnston, IA

Time	Wind (mph)	Vis (mi)	Weather	Precip (in)	Temperature (F)		Relative Humidity	Wind Chill (F)	Heat Index (F)	Pressure
Time	Wind (mph)	Vis (mi)	Weather	Precip (in)	Air	Dwpt	Relative Humidity	Wind Chill (F)	Heat Index (F)	altimeter (in)	sea level (mb)
01:00 AM CDT	SE 8.1	10.00	Clear	--	66.2	59.0	78%	NA	NA	29.78	1008.5
12:50 AM CDT	5.7	10.00	Clear	--	66.2	60.8	83%	NA	NA	29.78	1008.5
12:35 AM CDT	5.7	10.00	Clear	--	66.2	60.8	83%	NA	NA	29.78	1008.5
12:25 AM CDT	SE 3.4	10.00	Clear	--	66.2	60.8	83%	NA	NA	29.79	1008.8
12:20 AM CDT	SE 3.4	10.00	Clear	--	68.0	60.8	78%	NA	NA	29.78	1008.5
12:15 AM CDT	4.6	10.00	Clear	--	68.0	60.8	78%	NA	NA	29.78	1008.5
12:10 AM CDT	5.7	10.00	Clear	--	68.0	60.8	78%	NA	NA	29.77	1008.1
12:05 AM CDT	5.7	10.00	Clear	--	68.0	60.8	78%	NA	NA	29.77	1008.1
12:00 AM CDT	5.7	10.00	Clear	--	69.8	60.8	73%	NA	NA	29.76	1007.8
11:50 PM CDT	5.7	10.00	Clear	--	69.8	60.8	73%	NA	NA	29.75	1007.5
11:45 PM CDT	6.9	10.00	Clear	--	69.8	60.8	73%	NA	NA	29.74	1007.1
11:35 PM CDT	E 6.9	10.00	Clear	--	69.8	60.8	73%	NA	NA	29.75	1007.5
11:30 PM CDT	E 8.1	10.00	Clear	--	69.8	60.8	73%	NA	NA	29.76	1007.8
11:25 PM CDT	6.9	10.00	Clear	--	69.8	60.8	73%	NA	NA	29.76	1007.8
11:20 PM CDT	SE 6.9	10.00	Clear	--	69.8	60.8	73%	NA	NA	29.76	1007.8
11:15 PM CDT	6.9	10.00	Clear	--	69.8	60.8	73%	NA	NA	29.76	1007.8
11:10 PM CDT	E 9.2	10.00	Clear	--	69.8	60.8	73%	NA	NA	29.75	1007.5
11:05 PM CDT	E 9.2	10.00	Clear	--	71.6	59.0	65%	NA	71.4	29.75	1007.5
11:00 PM CDT	E 9.2	10.00	Clear	--	71.6	59.0	65%	NA	71.4	29.75	1007.5
10:45 PM CDT	E 8.1	10.00	Clear	--	71.6	60.8	69%	NA	71.8	29.75	1007.5
10:35 PM CDT	E 9.2	10.00	Clear	--	71.6	59.0	65%	NA	71.4	29.76	1007.8
10:30 PM CDT	E 6.9	10.00	Clear	--	71.6	59.0	65%	NA	71.4	29.77	1008.1
10:25 PM CDT	E 9.2	10.00	Mostly Clear	--	71.6	59.0	65%	NA	71.4	29.78	1008.5
10:15 PM CDT	9.2	10.00	Partly Cloudy	--	71.6	59.0	65%	NA	71.4	29.79	1008.8
10:10 PM CDT	9.2	10.00	Partly Cloudy	--	73.4	59.0	61%	NA	73.2	29.80	1009.1
10:05 PM CDT	10.4	10.00	Mostly Cloudy	--	73.4	59.0	61%	NA	73.2	29.80	1009.1
10:00 PM CDT	SE 13.8	10.00	Mostly Cloudy	--	73.4	59.0	61%	NA	73.2	29.80	1009.1
09:45 PM CDT	11.5	10.00	Light Rain	--	73.4	60.8	65%	NA	73.4	29.78	1008.5
09:40 PM CDT	13.8	10.00	Mostly Cloudy	--	73.4	60.8	65%	NA	73.4	29.78	1008.5
09:30 PM CDT	11.5	10.00	Mostly Cloudy	--	73.4	60.8	65%	NA	73.4	29.77	1008.1
09:25 PM CDT	13.8	10.00	Cloudy	--	73.4	60.8	65%	NA	73.4	29.77	1008.1
09:20 PM CDT	10.4	10.00	Cloudy	--	73.4	62.6	69%	NA	73.8	29.77	1008.1
09:15 PM CDT	12.7	10.00	Cloudy	--	73.4	64.4	73%	NA	73.9	29.77	1008.1
09:10 PM CDT	9.2	10.00	Cloudy	--	73.4	64.4	73%	NA	73.9	29.77	1008.1
09:00 PM CDT	SE 8.1	10.00	Cloudy	--	73.4	64.4	73%	NA	73.9	29.77	1008.1
08:50 PM CDT	SE 11.5	10.00	Cloudy	--	75.2	64.4	69%	NA	75.7	29.77	1008.1
08:35 PM CDT	6.9	10.00	Mostly Cloudy	--	75.2	66.2	74%	NA	75.9	29.76	1007.8
08:25 PM CDT	6.9	10.00	Mostly Cloudy	--	75.2	66.2	74%	NA	75.9	29.74	1007.1
08:20 PM CDT	9.2	10.00	Mostly Cloudy	--	75.2	66.2	74%	NA	75.9	29.74	1007.1
08:10 PM CDT	10.4	10.00	Mostly Cloudy	--	75.2	66.2	74%	NA	75.9	29.74	1007.1
08:05 PM CDT	10.4	10.00	Cloudy	--	75.2	66.2	74%	NA	75.9	29.74	1007.1
08:00 PM CDT	9.2	10.00	Cloudy	--	77.0	66.2	69%	NA	77.7	29.75	1007.5
07:50 PM CDT	E 5.7	10.00	Mostly Cloudy	--	77.0	66.2	69%	NA	77.7	29.75	1007.5
07:45 PM CDT	E 8.1	10.00	Mostly Cloudy	--	77.0	64.4	65%	NA	77.5	29.75	1007.5
07:35 PM CDT	E 6.9	10.00	Partly Cloudy	--	78.8	66.2	65%	NA	79.5	29.75	1007.5
07:20 PM CDT	E 5.7	10.00	Mostly Clear	--	78.8	64.4	61%	NA	79.3	29.75	1007.5
07:05 PM CDT	E 5.7	10.00	Partly Cloudy	--	78.8	64.4	61%	NA	79.3	29.75	1007.5
07:00 PM CDT	6.9	10.00	Partly Cloudy	--	78.8	64.4	61%	NA	79.3	29.75	1007.5
06:45 PM CDT	E 8.1	10.00	Clear	--	78.8	64.4	61%	NA	79.3	29.74	1007.1
06:35 PM CDT	E 9.2	10.00	Clear	--	78.8	64.4	61%	NA	79.3	29.74	1007.1
06:30 PM CDT	E 10.4	10.00	Mostly Clear	--	78.8	64.4	61%	NA	79.3	29.75	1007.5
06:20 PM CDT	E 9.2	10.00	Mostly Clear	--	78.8	64.4	61%	NA	79.3	29.76	1007.8
06:15 PM CDT	E 8.1	10.00	Mostly Clear	--	78.8	64.4	61%	NA	79.3	29.75	1007.5
06:10 PM CDT	E 10.4	10.00	Partly Cloudy	--	80.6	64.4	58%	NA	82.2	29.74	1007.1
06:05 PM CDT	E 10.4 G 16.1	10.00	Partly Cloudy	--	80.6	64.4	58%	NA	82.2	29.74	1007.1
05:53 PM CDT	E 12.8	10.00	Mostly Cloudy	--	79.0	64.0	60%	NA	79.3	29.77	1008.1
05:45 PM CDT	9.2	10.00	Mostly Cloudy	--	78.8	64.4	61%	NA	79.3	29.77	1008.1
05:40 PM CDT	E 15.0	10.00	Partly Cloudy	--	78.8	64.4	61%	NA	79.3	29.77	1008.1
05:30 PM CDT	12.7	10.00	Mostly Cloudy	--	80.6	64.4	58%	NA	82.2	29.77	1008.1
05:20 PM CDT	13.8	10.00	Cloudy	--	78.8	64.4	61%	NA	79.3	29.78	1008.5
05:10 PM CDT	11.5	10.00	Cloudy	--	78.8	64.4	61%	NA	79.3	29.78	1008.5
05:00 PM CDT	E 6.9	10.00	Cloudy	--	78.8	64.4	61%	NA	79.3	29.77	1008.1
04:50 PM CDT	E 9.2	10.00	Cloudy	--	78.8	62.6	58%	NA	79.2	29.78	1008.5
04:35 PM CDT	E 9.2	10.00	Cloudy	--	78.8	62.6	58%	NA	79.2	29.80	1009.1
04:25 PM CDT	E 5.7	10.00	Cloudy	--	78.8	62.6	58%	NA	79.2	29.80	1009.1
04:20 PM CDT	E 9.2	10.00	Cloudy	--	78.8	62.6	58%	NA	79.2	29.80	1009.1
04:10 PM CDT	E 12.7	10.00	Cloudy	--	78.8	62.6	58%	NA	79.2	29.80	1009.1
04:00 PM CDT	9.2	10.00	Cloudy	--	78.8	62.6	58%	NA	79.2	29.80	1009.1
03:50 PM CDT	E 11.5	10.00	Cloudy	--	78.8	62.6	58%	NA	79.2	29.80	1009.1
03:45 PM CDT	E 12.7	10.00	Cloudy	--	80.6	62.6	54%	NA	81.9	29.80	1009.1
03:35 PM CDT	E 11.5	10.00	Mostly Cloudy	--	80.6	62.6	54%	NA	81.9	29.80	1009.1
03:30 PM CDT	11.5	10.00	Mostly Cloudy	--	80.6	62.6	54%	NA	81.9	29.80	1009.1