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

89.6 F

Humidity:	71%
Wind Speed:	SE 4.6 mph
Barometer:	29.84 in
Dewpoint:	78.8 F
Visibility:	10.00 mi
Precip:	--
Heat Index:	105.3 F
Wind Chill:	NA

Sep 2 2026, 05:35 PM 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)
05:35 PM CDT	SE 4.6	10.00	Clear	--	89.6	78.8	71%	NA	105.3	29.84	1010.5
05:20 PM CDT	4.6	10.00	Clear	--	87.8	77.0	70%	NA	99.9	29.85	1010.8
05:15 PM CDT	4.6	10.00	Mostly Clear	--	87.8	77.0	70%	NA	99.9	29.85	1010.8
05:05 PM CDT	6.9	10.00	Mostly Clear	--	87.8	75.2	66%	NA	97.7	29.85	1010.8
05:00 PM CDT	6.9	10.00	Mostly Clear	--	86.0	75.2	70%	NA	95.2	29.85	1010.8
04:50 PM CDT	5.7	10.00	Mostly Clear	--	84.2	75.2	74%	NA	92.5	29.85	1010.8
04:40 PM CDT	5.7	10.00	Mostly Clear	--	84.2	75.2	74%	NA	92.5	29.86	1011.2
04:35 PM CDT	5.7	10.00	Mostly Clear	--	84.2	77.0	79%	NA	94.1	29.86	1011.2
04:30 PM CDT	E 5.7	10.00	Mostly Clear	--	84.2	77.0	79%	NA	94.1	29.86	1011.2
04:20 PM CDT	5.7	8.00	Light Rain	--	82.4	77.0	84%	NA	90.9	29.86	1011.2
04:12 PM CDT	SE 5.8	3.00	Light Rain and Fog/Mist	00.03	81.0	78.1	91%	NA	88.5	29.87	1011.5
04:10 PM CDT	SE 5.7	3.00	Light Rain and Fog/Mist	--	80.6	77.0	89%	NA	87.1	29.87	1011.5
04:00 PM CDT	0.0	10.00	Light Rain	--	82.4	75.2	79%	NA	89.4	29.89	1012.2
03:45 PM CDT	4.6	10.00	Mostly Cloudy	--	82.4	75.2	79%	NA	89.4	29.89	1012.2
03:40 PM CDT	4.6	10.00	Mostly Cloudy	--	82.4	75.2	79%	NA	89.4	29.89	1012.2
03:35 PM CDT	0.0	10.00	Mostly Cloudy	--	84.2	77.0	79%	NA	94.1	29.88	1011.9
03:25 PM CDT	0.0	10.00	Mostly Cloudy	--	84.2	77.0	79%	NA	94.1	29.88	1011.9
03:20 PM CDT	0.0	10.00	Thunderstorms	--	84.0	75.9	77%	NA	92.8	29.88	1011.9
03:15 PM CDT	SE 3.4	8.00	Light Rain	--	82.4	75.2	79%	NA	89.4	29.88	1011.9
03:10 PM CDT	3.4	4.00	Light Rain	--	82.4	75.2	79%	NA	89.4	29.89	1012.2
03:05 PM CDT	E 5.7	3.50	Rain	--	84.2	73.4	70%	NA	90.9	29.88	1011.9
03:00 PM CDT	0.0	6.00	Light Rain	--	87.8	73.4	62%	NA	95.9	29.90	1012.5
02:50 PM CDT	0.0	10.00	Mostly Cloudy	--	87.8	71.6	59%	NA	94.3	29.90	1012.5
02:40 PM CDT	5.7	10.00	Partly Cloudy	--	87.8	69.8	55%	NA	92.7	29.90	1012.5
02:30 PM CDT	6.9	10.00	Partly Cloudy	--	89.6	71.6	56%	NA	96.4	29.90	1012.5
02:20 PM CDT	4.6	10.00	Partly Cloudy	--	89.6	69.8	52%	NA	94.8	29.90	1012.5
02:15 PM CDT	5.7	10.00	Partly Cloudy	--	91.4	71.6	53%	NA	98.6	29.90	1012.5
02:10 PM CDT	0.0	10.00	Mostly Cloudy	--	89.6	71.6	56%	NA	96.4	29.90	1012.5
02:00 PM CDT	S 4.6	10.00	Mostly Cloudy	--	87.8	73.4	62%	NA	95.9	29.91	1012.9
01:50 PM CDT	3.4	7.00	Light Rain	--	87.8	69.8	55%	NA	92.7	29.92	1013.2
01:45 PM CDT	SW 4.6	10.00	Mostly Cloudy	--	87.8	69.8	55%	NA	92.7	29.92	1013.2
01:40 PM CDT	SW 4.6	10.00	Partly Cloudy	--	87.8	69.8	55%	NA	92.7	29.92	1013.2
01:30 PM CDT	6.9	10.00	Mostly Clear	--	87.8	69.8	55%	NA	92.7	29.91	1012.9
01:25 PM CDT	6.9	10.00	Mostly Clear	--	89.6	69.8	52%	NA	94.8	29.91	1012.9
01:20 PM CDT	6.9	10.00	Clear	--	89.6	68.0	49%	NA	93.6	29.91	1012.9
01:15 PM CDT	6.9	10.00	Clear	--	89.6	69.8	52%	NA	94.8	29.91	1012.9
01:10 PM CDT	S 8.1	10.00	Clear	--	91.4	69.8	49%	NA	97.0	29.91	1012.9
01:05 PM CDT	10.4	10.00	Clear	--	91.4	69.8	49%	NA	97.0	29.91	1012.9
01:00 PM CDT	3.4	10.00	Clear	--	91.4	68.0	46%	NA	95.5	29.91	1012.9
12:50 PM CDT	6.9	10.00	Clear	--	89.6	68.0	49%	NA	93.6	29.92	1013.2
12:40 PM CDT	S 6.9	10.00	Clear	--	89.6	68.0	49%	NA	93.6	29.92	1013.2
12:35 PM CDT	8.1	10.00	Clear	--	89.6	68.0	49%	NA	93.6	29.92	1013.2
12:25 PM CDT	S 8.1	10.00	Clear	--	91.4	69.8	49%	NA	97.0	29.93	1013.5
12:20 PM CDT	9.2	10.00	Clear	--	91.4	71.6	53%	NA	98.6	29.93	1013.5
12:15 PM CDT	5.7	10.00	Mostly Clear	--	89.6	69.8	52%	NA	94.8	29.93	1013.5
12:10 PM CDT	9.2	10.00	Mostly Clear	--	89.6	69.8	52%	NA	94.8	29.93	1013.5
12:00 PM CDT	S 6.9	10.00	Mostly Clear	--	87.8	69.8	55%	NA	92.7	29.93	1013.5
11:50 AM CDT	S 12.7	10.00	Mostly Clear	--	87.8	68.0	52%	NA	91.4	29.93	1013.5
11:40 AM CDT	S 9.2	10.00	Clear	--	89.6	69.8	52%	NA	94.8	29.93	1013.5
11:35 AM CDT	SE 11.5	10.00	Clear	--	87.8	69.8	55%	NA	92.7	29.93	1013.5
11:30 AM CDT	11.5	10.00	Clear	--	87.8	69.8	55%	NA	92.7	29.93	1013.5
11:20 AM CDT	11.5	10.00	Clear	--	87.8	69.8	55%	NA	92.7	29.93	1013.5
11:15 AM CDT	SE 11.5	10.00	Clear	--	87.8	69.8	55%	NA	92.7	29.93	1013.5
11:10 AM CDT	SE 9.2	10.00	Clear	--	87.8	69.8	55%	NA	92.7	29.93	1013.5
11:05 AM CDT	SE 10.4	10.00	Clear	--	87.8	69.8	55%	NA	92.7	29.93	1013.5
11:00 AM CDT	10.4	10.00	Clear	--	86.0	69.8	59%	NA	90.7	29.93	1013.5
10:50 AM CDT	9.2	10.00	Clear	--	86.0	69.8	59%	NA	90.7	29.94	1013.9
10:35 AM CDT	S 4.6	10.00	Mostly Clear	--	82.4	69.8	66%	NA	86.2	29.95	1014.2
10:25 AM CDT	SE 9.2	10.00	Clear	--	84.2	69.8	62%	NA	88.5	29.94	1013.9
10:20 AM CDT	SE 6.9	10.00	Clear	--	84.2	69.8	62%	NA	88.5	29.94	1013.9
10:15 AM CDT	6.9	10.00	Clear	--	84.2	69.8	62%	NA	88.5	29.94	1013.9
10:10 AM CDT	SE 10.4	10.00	Clear	--	82.4	69.8	66%	NA	86.2	29.94	1013.9
10:05 AM CDT	10.4	10.00	Clear	--	82.4	69.8	66%	NA	86.2	29.93	1013.5
09:50 AM CDT	9.2	10.00	Clear	--	82.4	69.8	66%	NA	86.2	29.93	1013.5
09:45 AM CDT	10.4	10.00	Clear	--	80.6	69.8	70%	NA	83.8	29.93	1013.5
09:35 AM CDT	9.2	10.00	Clear	--	80.6	69.8	70%	NA	83.8	29.93	1013.5
09:30 AM CDT	SE 8.1	10.00	Clear	--	80.6	69.8	70%	NA	83.8	29.94	1013.9
09:25 AM CDT	SE 5.7	10.00	Clear	--	80.6	69.8	70%	NA	83.8	29.94	1013.9
09:20 AM CDT	5.7	10.00	Clear	--	80.6	69.8	70%	NA	83.8	29.93	1013.5
09:15 AM CDT	SE 5.7	9.00	Mostly Clear	--	80.6	69.8	70%	NA	83.8	29.94	1013.9
09:05 AM CDT	SE 6.9	10.00	Mostly Clear	--	78.8	69.8	74%	NA	79.9	29.94	1013.9
08:50 AM CDT	SE 8.1	10.00	Mostly Clear	--	77.0	69.8	78%	NA	78.1	29.94	1013.9