Weather archive in Alton for the last week, weather in Alton for september 2025 year

Weather & Climate
Weather archive
USA
Illinois
St. Louis Regional Airport

WEATHER IN Alton

Weather forecast in Alton
Climate monitor in Alton

Time and date
10:50	08.09
11:50	08.09
12:50	08.09
13:50	08.09
14:50	08.09
15:50	08.09
16:50	08.09
17:50	08.09
18:50	08.09
19:50	08.09
20:50	08.09
21:15	08.09
21:35	08.09
21:55	08.09
22:15	08.09
22:35	08.09
22:55	08.09
23:15	08.09
23:35	08.09
23:55	08.09
00:15	09.09
00:35	09.09
00:55	09.09
01:15	09.09
01:35	09.09
01:55	09.09
02:15	09.09
02:35	09.09
02:55	09.09
03:15	09.09
03:35	09.09
03:55	09.09
04:15	09.09
04:35	09.09
04:55	09.09
05:15	09.09
05:35	09.09
05:50	09.09
06:50	09.09
07:50	09.09
08:50	09.09
09:50	09.09
10:50	09.09
11:50	09.09
12:50	09.09
13:50	09.09
14:50	09.09
15:50	09.09

Wind (dir.,mph)		Visibility	Phenomena	Clouds	Т (F)	Тd (F)	f (%)	Тe (F)	Тes (F)	Comfort	P (in)	Po (in)	Тmin (F)	Tmax (F)	R (in)	R24 (in)	S (in)
SE	8 {4}	10 miles		clear	70	43	38	72	88	comfort		29.71
E	6 {3}	10 miles		clear	72	41	33	72	95	comfort		29.69
E	3 {2}	10 miles		clear	73	43	33	73	104	comfort		29.66
E	5 {2}	10 miles		clear	73	41	31	73	99	comfort		29.63
E	5 {2}	10 miles		clear	75	41	29	75	95	comfort		29.62
S	6 {3}	10 miles		clear	75	41	29	75	88	comfort		29.59
		10 miles		clear	73	43	33	73	84	comfort		29.59
calm	0	10 miles		clear	68	50	53	70	73	comfort		29.58
calm	0	10 miles		clear	59	50	72	59	59			29.57
calm	0	10 miles		clear	55	48	77	55	55			29.58
calm	0	10 miles		clear	52	48	87	50	50			29.58
calm	0	10 miles		clear	52	48	86	50	50			29.58
W	3 {2}	10 miles		clear	51	47	87	50	50			29.58
W	3 {2}	10 miles		clear	50	47	87	48	48			29.58
calm	0	10 miles		clear	50	46	89	48	48			29.59
W	3 {2}	10 miles		clear	49	46	88	46	46			29.59
W	3 {2}	10 miles		clear	49	46	89	46	46			29.59
calm	0	10 miles		clear	49	46	89	48	48			29.59
calm	0	10 miles		clear	48	45	89	46	46			29.59
calm	0	10 miles		clear	48	45	89	46	46			29.59	47	67
W	5 {2}	10 miles		clear	47	44	89	43	43			29.58
W	6 {3}	10 miles		clear	48	44	84	45	45			29.58
W	3 {2}	10 miles		clear	49	44	83	46	46			29.58
W	3 {2}	10 miles		clear	49	44	83	46	46			29.58
W	3 {2}	10 miles		clear	49	44	84	46	46			29.57
W	3 {2}	10 miles		clear	48	44	86	45	45			29.57
calm	0	10 miles		clear	47	44	90	45	45			29.57
calm	0	10 miles		clear	48	45	87	46	46			29.57
calm	0	10 miles		clear	47	44	90	46	46			29.57
calm	0	10 miles		clear	47	44	90	45	45			29.58
calm	0	10 miles		clear	47	44	90	45	45			29.57
calm	0	10 miles		clear	47	45	90	46	46			29.57
calm	0	10 miles		clear	47	45	91	46	46			29.57
calm	0	10 miles		clear	47	45	92	46	46			29.57
calm	0	10 miles		clear	47	45	91	46	46			29.57
calm	0	10 miles		clear	46	44	92	45	45			29.57
calm	0	10 miles		clear	46	44	92	45	45			29.57
calm	0	10 miles		clear	46	45	93	45	45			29.57
E	3 {2}	10 miles		clear	52	48	87	50	50			29.58
SE	5 {2}	10 miles		clear	57	50	77	55	59			29.57
SE	3 {2}	10 miles		clear	63	50	63	64	72			29.57
SE	7 {4}	10 miles		clear	68	52	56	72	82	comfort		29.58
S	6 {3}	10 miles		clear	73	50	44	77	95	comfort		29.56
		10 miles		clear	77	50	39	79	113	hot		29.54
S	8 {4}	10 miles		clear	77	46	34	77	97	comfort		29.52
S	5 {2}	10 miles		clear	77	48	36	79	102	hot		29.50
S	8 {4}	10 miles		clear	77	48	36	79	93	hot		29.49
E	6 {3}	10 miles		clear	79	48	34	79	91	hot		29.47

Weather station location St. Louis Regional Airport: latitude 38.9000 longitude -90.0500 Height above sea level 166 m.

The archive shows weather in Alton for the last 1-2 days. The actual weather information in the database is updated hourly! The entire month and previous months archive data can be obtained by selecting the date range of interest from the drop-down list and pressing the "Enter!".

Attention! The METAR weather archive in database for stations not included in the climate monitor is stored for no more than 60 days. It makes no sense to try to choose an earlier date.

Attention! The time in the tables is local time (not including daylight saving time). To obtain Universal Time, subtract the correction, which is equal to -6 h.

See also the weather archive in nearby cities and at nearby weather stations:

Partners of our site:

Column explanations:

Wind - indicated wind speed in m/s - average for 10 minutes, gusts within and between terms (in curly brackets) and direction from which the wind blows: N - North, NE - North-East, E - East, SE - South-East , S - South, SW - South-West, W - West, NW - North-West.
Visibility - horizontal range of visibility in meters or kilometers. When visibility is from 1 to 10 km in the absence of precipitation, haze is usually observed, and when visibility is reduced to 1 km or less, fog is observed. In dry weather, visibility may be reduced by smoke, dust, or haze.
Phenomena - atmospheric phenomena observed during the period of observations.
Clouds - are through slash total and lower clouds in points, and the height of the lower border of the cloud in meters; square brackets contain cloud forms: Ci - Cirrus, Cs - Cirrostratus, Cc - Cirrocumulus, Ac - Altocumulus, As - Altostratus, Sc - Stratocumulus, Ns - Nimbostratus, Cu - Cumulus, Cb - Cumulonimbus. For more information about cloud classification, see the cloud Atlas (PDF).
T - Air temperature - temperature measured at a height of 2 m above the ground.
Td - Dew point temperature - the temperature at which the water vapor contained in the air reaches saturation.
f - Relative humidity measured at a height of 2 m above the ground.
Te - Effective temperature is the temperature felt by a seasonally dressed person in the shade. Characteristic of stuffy weather. The calculation takes into account the effects of air humidity and wind speed on a person's heat sensation.
Tes - Effective sun temperature - The temperature a person feels, corrected for solar heating. Characteristic of sweltering weather. Depends on the height of the sun above the horizon, cloud cover, and wind speed. At night, overcast, and with winds of 12 m/s or more, the correction is zero.
P - Atmospheric pressure - atmospheric pressure reduced to sea level.
Po - Atmospheric pressure - atmospheric pressure measured at the station level.
Tmin - Minimum temperature - minimum air temperature at a height of 2 m above the ground.
Tmax - Maximum temperature - maximum air temperature at a height of 2 m above the ground.
R - Precipitation - The amount of precipitation over a period of time, mm. When you hover over the number, the time period for which the specified amount of precipitation has fallen.
R24 - Precipitation 24h - The amount of precipitation in 24 hours, mm.
S - Snow cover - The height of the snow cover. When you hover the mouse over the number - the state of the snow cover and the degree of coverage in points.