Arnold, MO Current Weather Conditions

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

▼Current Conditions — Arnold, MO

ST LOUIS/SPIRIT (KSUS)

Mostly Cloudy

73.4 F

Humidity:	100%
Wind Speed:	0.0 mph
Barometer:	29.85 in
Dewpoint:	73.4 F
Visibility:	7.00 mi
Precip:	--
Heat Index:	75.2 F
Wind Chill:	NA

Jun 28 2026, 05:00 AM CDT

Alert Subscriptions

Severe Weather

Tornado, flood & storm warnings

Observations

Station conditions & threshold alerts

Daily Forecast

Morning summary delivered daily

Lightning

Real-time strike alerts

▼State Weather Snapshot — Missouri

Temperature

Dewpoint

Wind Speed

Full Interactive Observation Map →

▼Radar — Missouri

Loading radar…

Active Alerts Lightning

Full Interactive Radar Map →

▼Hourly Observation History — Arnold, MO

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)
05:00 AM CDT	0.0	7.00	Mostly Cloudy	--	73.4	73.4	100%	NA	75.2	29.85	1010.8
04:45 AM CDT	0.0	7.00	Mostly Cloudy	--	73.4	73.4	100%	NA	75.2	29.85	1010.8
04:40 AM CDT	0.0	8.00	Cloudy	--	73.4	73.4	100%	NA	75.2	29.85	1010.8
04:35 AM CDT	0.0	8.00	Cloudy	--	73.4	73.4	100%	NA	75.2	29.85	1010.8
04:20 AM CDT	0.0	8.00	Cloudy	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
04:15 AM CDT	0.0	7.00	Cloudy	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
04:10 AM CDT	0.0	7.00	Cloudy	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
04:00 AM CDT	0.0	7.00	Cloudy	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
03:50 AM CDT	0.0	7.00	Cloudy	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
03:40 AM CDT	0.0	5.00	Fog/Mist	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
03:30 AM CDT	0.0	5.00	Fog/Mist	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
03:25 AM CDT	0.0	7.00	Mostly Clear	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
03:20 AM CDT	0.0	10.00	Clear	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
03:15 AM CDT	0.0	10.00	Clear	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
03:05 AM CDT	0.0	5.00	Fog/Mist	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
03:00 AM CDT	0.0	6.00	Fog/Mist	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
02:50 AM CDT	0.0	6.00	Fog/Mist	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
02:35 AM CDT	0.0	8.00	Clear	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
02:25 AM CDT	0.0	10.00	Mostly Clear	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
02:20 AM CDT	0.0	10.00	Mostly Clear	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
02:10 AM CDT	0.0	10.00	Mostly Clear	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
02:00 AM CDT	E 3.4	10.00	Partly Cloudy	--	73.4	71.6	94%	NA	74.8	29.85	1010.8
01:45 AM CDT	3.4	9.00	Mostly Clear	--	73.4	71.6	94%	NA	74.8	29.86	1011.2
01:40 AM CDT	0.0	9.00	Mostly Clear	--	73.4	73.4	100%	NA	75.2	29.86	1011.2
01:35 AM CDT	0.0	8.00	Partly Cloudy	--	73.4	73.4	100%	NA	75.2	29.86	1011.2
01:30 AM CDT	0.0	8.00	Mostly Clear	--	73.4	73.4	100%	NA	75.2	29.86	1011.2
01:25 AM CDT	0.0	9.00	Mostly Clear	--	73.4	73.4	100%	NA	75.2	29.86	1011.2
01:20 AM CDT	0.0	9.00	Mostly Clear	--	73.4	73.4	100%	NA	75.2	29.86	1011.2
01:10 AM CDT	0.0	10.00	Partly Cloudy	--	73.4	73.4	100%	NA	75.2	29.86	1011.2
01:00 AM CDT	0.0	10.00	Mostly Cloudy	--	73.4	73.4	100%	NA	75.2	29.86	1011.2
12:50 AM CDT	0.0	10.00	Partly Cloudy	--	73.4	73.4	100%	NA	75.2	29.87	1011.5
12:40 AM CDT	0.0	9.00	Mostly Cloudy	--	73.4	73.4	100%	NA	75.2	29.87	1011.5
12:35 AM CDT	0.0	9.00	Mostly Cloudy	--	73.4	73.4	100%	NA	75.2	29.87	1011.5
12:30 AM CDT	0.0	10.00	Mostly Cloudy	--	73.4	73.4	100%	NA	75.2	29.87	1011.5
12:15 AM CDT	0.0	10.00	Mostly Cloudy	--	73.4	73.4	100%	NA	75.2	29.87	1011.5
12:10 AM CDT	0.0	10.00	Partly Cloudy	--	73.4	71.6	94%	NA	74.8	29.87	1011.5
12:00 AM CDT	0.0	8.00	Clear	--	73.4	73.4	100%	NA	75.2	29.87	1011.5
11:45 PM CDT	0.0	9.00	Clear	--	73.4	73.4	100%	NA	75.2	29.87	1011.5
11:40 PM CDT	0.0	9.00	Clear	--	73.4	73.4	100%	NA	75.2	29.88	1011.9
11:20 PM CDT	0.0	9.00	Clear	--	73.4	73.4	100%	NA	75.2	29.88	1011.9
11:10 PM CDT	0.0	9.00	Mostly Clear	--	73.4	73.4	100%	NA	75.2	29.88	1011.9
11:00 PM CDT	0.0	10.00	Clear	--	73.4	73.4	100%	NA	75.2	29.88	1011.9
10:50 PM CDT	0.0	10.00	Clear	--	75.2	73.4	94%	NA	76.8	29.88	1011.9
10:40 PM CDT	0.0	10.00	Clear	--	75.2	73.4	94%	NA	76.8	29.88	1011.9
10:35 PM CDT	0.0	10.00	Clear	--	75.2	73.4	94%	NA	76.8	29.88	1011.9
10:20 PM CDT	0.0	10.00	Clear	--	75.2	73.4	94%	NA	76.8	29.89	1012.2
10:15 PM CDT	0.0	10.00	Clear	--	75.2	73.4	94%	NA	76.8	29.88	1011.9
10:10 PM CDT	0.0	10.00	Clear	--	75.2	73.4	94%	NA	76.8	29.88	1011.9
10:00 PM CDT	3.4	10.00	Clear	--	75.2	73.4	94%	NA	76.8	29.88	1011.9
09:50 PM CDT	3.4	10.00	Clear	--	75.2	73.4	94%	NA	76.8	29.88	1011.9
09:40 PM CDT	S 3.4	10.00	Mostly Clear	--	77.0	73.4	89%	NA	78.6	29.88	1011.9
09:35 PM CDT	0.0	10.00	Mostly Clear	--	77.0	73.4	89%	NA	78.6	29.87	1011.5
09:30 PM CDT	0.0	10.00	Mostly Clear	--	77.0	73.4	89%	NA	78.6	29.88	1011.9
09:25 PM CDT	0.0	10.00	Mostly Clear	--	77.0	73.4	89%	NA	78.6	29.87	1011.5
09:20 PM CDT	SE 3.4	10.00	Mostly Clear	--	78.8	73.4	84%	NA	82.0	29.87	1011.5
09:15 PM CDT	3.4	10.00	Partly Cloudy	--	78.8	73.4	84%	NA	82.0	29.87	1011.5
09:10 PM CDT	5.7	10.00	Mostly Clear	--	78.8	73.4	84%	NA	82.0	29.87	1011.5
09:00 PM CDT	5.7	10.00	Clear	--	78.8	73.4	84%	NA	82.0	29.87	1011.5
08:45 PM CDT	S 4.6	10.00	Mostly Clear	--	78.8	73.4	84%	NA	82.0	29.85	1010.8
08:40 PM CDT	S 5.7	10.00	Mostly Clear	--	78.8	73.4	84%	NA	82.0	29.84	1010.5
08:35 PM CDT	S 5.7	10.00	Mostly Clear	--	78.8	73.4	84%	NA	82.0	29.85	1010.8
08:25 PM CDT	4.6	10.00	Partly Cloudy	--	78.8	73.4	84%	NA	82.0	29.85	1010.8
08:20 PM CDT	S 6.9	10.00	Partly Cloudy	--	78.8	73.4	84%	NA	82.0	29.86	1011.2
08:15 PM CDT	S 4.6	10.00	Mostly Clear	--	80.6	73.4	79%	NA	85.3	29.86	1011.2
08:10 PM CDT	5.7	10.00	Partly Cloudy	--	80.6	73.4	79%	NA	85.3	29.86	1011.2
08:00 PM CDT	5.7	10.00	Mostly Clear	--	80.6	73.4	79%	NA	85.3	29.87	1011.5
07:50 PM CDT	6.9	10.00	Mostly Clear	--	80.6	73.4	79%	NA	85.3	29.87	1011.5
07:45 PM CDT	4.6	10.00	Partly Cloudy	--	80.6	73.4	79%	NA	85.3	29.87	1011.5
07:35 PM CDT	SW 5.7	10.00	Mostly Clear	--	80.6	73.4	79%	NA	85.3	29.87	1011.5
07:25 PM CDT	6.9	10.00	Partly Cloudy	--	80.6	73.4	79%	NA	85.3	29.87	1011.5
07:20 PM CDT	6.9	10.00	Partly Cloudy	--	80.6	73.4	79%	NA	85.3	29.86	1011.2
07:15 PM CDT	SW 9.2	10.00	Mostly Clear	--	80.6	73.4	79%	NA	85.3	29.86	1011.2