Wind & Wind gust
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Wind (m/s)	1.89	1.81	1.69	1.39	1.31	1.5	1.5	1.39	1.31	1.5	1.69	1.89	1.89	1.89	1.5	1.39	1.19	1.31	1.31	2.19	1.89	1.69	2	1.89
Wind gust (m/s)	3.33	3.42	2.92	2.22	1.33	1.53	1.5	1.5	1.83	2.03	2	2.03	6.89	5.89	5.5	6.39	6.19	1.31	1.31	2.53	2.19	2.11	2.5	2.92
Wind direction (°)	ESE 123°	SE 142°	SSE 152°	SSE 151°	SE 139°	SE 129°	ESE 120°	ESE 123°	SE 131°	SE 136°	SE 138°	SE 140°	SE 140°	SE 136°	SE 145°	SE 137°	SE 136°	SE 124°	ESE 105°	ESE 106°	ESE 107°	ESE 111°	ESE 111°	SE 124°

Air humidity

Humidity
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Humidity (%)	44	45	46	46	47	47	48	48	47	42	36	32	29	27	26	25	25	26	29	31	33	35	36	38

Atmospheric pressure

Pressure
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Pressure (mm Hg)	769	770	770	769	769	769	769	769	770	770	770	770	769	768	767	767	767	767	767	767	767	767	767	767

Ultraviolet index

UV Index
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
UV Index	0	0	0	0	0	0	0	0	0	0.6	1.6	3	4.2	4.6	4.2	3.1	1.7	0.6	0	0	0	0	0	0

Air quality & pollen

Air quality is available for the first three days only.

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St. Louis on the map

Data Sources & Methodology

Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.

Learn more about our methodology →