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Alton / St. Louis Regional
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D
a
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Time
(cst)
Wind
(mph)
Vis.
(mi.)
WeatherSky Cond. Temperature (ºF)Relative
Humidity
PressurePrecipitation (in.)
AirDwpt6 hour altimeter
(in.)
sea level
(mb)
1 hr 3 hr6 hr
Max.Min.
2222:25E 510.00FairCLR4640 82%30.06NA
2222:05E 610.00FairCLR4640 81%30.05NA
2221:50E 910.00ClearSKC4539 81%30.06NA
2221:45E 710.00FairCLR4640 81%30.06NA
2221:25E 510.00FairCLR4640 79%30.06NA
2221:05E 710.00FairCLR4740 79%30.06NA
2220:50E 1210.00ClearSKC4641 82%30.06NA
2220:45E 610.00FairCLR4740 78%30.06NA
2220:25E 510.00FairCLR4740 76%30.06NA
2220:05E 510.00FairCLR4840 73%30.06NA
2219:50E 1210.00ClearSKC4839 71%30.06NA
2219:45E 610.00FairCLR4939 70%30.06NA
2219:25E 710.00FairCLR4939 68%30.06NA
2219:05E 610.00FairCLR5038 64%30.06NA
2218:50E 910.00ClearSKC5037 62%30.06NA
2217:52E 910.00ClearSKC5237 58%30.05NA
2216:52E 710.00A Few CloudsFEW2005437 54%30.05NA
2215:50E 1210.00A Few CloudsFEW2005737 48%30.06NA
2214:50E 1310.00A Few CloudsFEW2005941 51%30.04NA
2213:50E 1610.00Partly CloudySCT2005943 55%30.05NA
2212:50SE 1410.00Partly CloudySCT2005541 59%30.07NA
2208:50E 97.00ClearSKC5045 82%30.16NA
2205:45E 67.00FairCLR4442 504392%30.12NA
2205:25E 67.00FairCLR4442 92%30.12NA
2205:05E 510.00FairCLR4542 90%30.12NA
2204:45E 57.00FairCLR4442 93%30.12NA
2204:25E 37.00FairCLR4341 92%30.12NA
2204:05Calm7.00FairCLR4542 90%30.11NA
2203:45Calm7.00FairCLR4542 92%30.11NA
2203:25NE 310.00FairCLR4642 89%30.11NA
2203:05Calm10.00FairCLR4642 87%30.11NA
2202:45Calm10.00FairCLR4743 85%30.11NA
2202:25SE 310.00FairCLR4642 86%30.10NA
2202:05E 310.00Partly CloudySCT0954843 83%30.11NA
2201:45E 810.00Mostly CloudyBKN0954943 81%30.10NA
2201:25E 810.00Mostly CloudyBKN0954943 81%30.11NA
2201:05E 610.00FairCLR4642 86%30.11NA
2200:45E 510.00FairCLR4843 83%30.11NA
2200:25Calm10.00FairCLR4943 78%30.11NA
2200:05SE 510.00FairCLR4943 80%30.12NA
2123:45E 610.00FairCLR5043 574977%30.11NA
2123:25SE 510.00FairCLR4943 81%30.11NA
2123:05E 510.00FairCLR5044 80%30.11NA
2122:45E 610.00Partly CloudySCT0955044 80%30.11NA
2122:25E 610.00OvercastOVC0955245 77%30.11NA
2122:05E 610.00OvercastOVC0955445 71%30.11NA
2121:45E 710.00OvercastOVC0955445 71%30.11NA
2121:25E 610.00OvercastOVC0855545 71%30.12NA
2121:05E 610.00OvercastOVC0855545 71%30.11NA
2120:55E 1210.00OvercastOVC0855545 67%30.11NA
2120:45E 710.00OvercastOVC0855545 69%30.11NA
2120:25E 610.00OvercastOVC0855545 70%30.11NA
2120:05E 710.00OvercastOVC0855545 69%30.11NA
2119:45E 610.00OvercastOVC0855546 70%30.11NA
2119:25SE 610.00OvercastOVC0855546 71%30.11NA
2119:05E 610.00OvercastOVC0855646 70%30.11NA
2118:55SE 910.00OvercastOVC0855546 72%30.10NA
2116:50SE 710.00OvercastOVC0755548 77%30.09NA
2113:50Vrbl 610.00Partly CloudySCT1006146 59%30.08NA
2112:50Vrbl 610.00Partly CloudySCT0906146 59%30.10NA
2111:50Vrbl 610.00Partly CloudySCT0805948 68%30.12NA
2109:50Vrbl 65.00 Fog/MistSCT0805248 88%30.15NA
2108:50Vrbl 63.00 Fog/MistBKN0804846 94%30.15NA
2107:50Calm3.00 Fog/MistBKN0804543 93%30.14NA
2106:50Calm3.00 Fog/MistSCT0504141 100%30.13NA
2105:45NE 34.00 Fog/MistOVC0504443 474395%30.11NA
2105:25E 54.00 Fog/MistOVC0504443 95%30.11NA
2105:05E 34.00 Fog/MistOVC0504443 96%30.11NA
2104:45NE 34.00 Fog/MistBKN060 BKN0804443 97%30.11NA
2104:25NE 34.00 Fog/MistSCT048 SCT060 OVC0804443 96%30.11NA
2104:05Calm5.00 Fog/MistBKN050 BKN060 OVC0804543 95%30.11NA
2103:45E 35.00 Fog/MistOVC0504544 95%30.11NA
2103:25E 65.00 Fog/MistOVC0504544 95%30.11NA
2103:05E 35.00 Fog/MistBKN049 OVC0654544 96%30.12NA
2102:45Calm5.00 Fog/MistBKN0604544 97%30.12NA
2102:25NE 54.00 Fog/MistSCT0604443 97%30.12NA
2102:05E 35.00 Fog/MistBKN0604443 97%30.12NA
2101:45Calm5.00 Fog/MistBKN060 BKN0804544 96%30.11NA
2101:25Calm5.00 Fog/MistSCT050 SCT0804544 95%30.11NA
2101:05NE 57.00Mostly CloudyBKN0504644 93%30.11NA
2100:45NE 37.00Mostly CloudyBKN0504644 92%30.12NA
2100:25NE 37.00Partly CloudySCT0504644 93%30.13NA
2100:05NE 57.00Partly CloudySCT0604645 94%30.13NA
2023:45Calm7.00Mostly CloudyBKN0604745 524793%30.13NA
2023:25NE 37.00Mostly CloudyBKN0604845 90%30.14NA
2023:05Calm7.00Mostly CloudyBKN060 BKN0804746 93%30.14NA
2022:45Calm10.00OvercastSCT060 OVC0804946 87%30.14NA
2022:25NE 510.00OvercastSCT060 OVC0804946 88%30.14NA
2022:05Calm10.00OvercastSCT060 OVC0804946 89%30.15NA
2021:50Calm10.00OvercastOVC0805046 88%30.15NA
2021:45Calm10.00OvercastOVC0804946 87%30.15NA
2021:25Calm10.00OvercastOVC0704946 87%30.15NA
2021:05NE 310.00OvercastOVC0704946 90%30.16NA
2020:50Calm10.00OvercastOVC0705046 88%30.16NA
2020:45Calm10.00OvercastOVC0704946 88%30.16NA
2020:25NE 310.00OvercastOVC0604946 87%30.16NA
2020:05NE 310.00OvercastOVC0604946 89%30.16NA
2019:50Calm10.00Mostly CloudyBKN0605046 88%30.16NA
2019:45Calm10.00OvercastOVC0604946 89%30.16NA
2019:25Calm10.00OvercastOVC0604946 88%30.16NA
2019:05NE 310.00Mostly CloudyBKN0604946 87%30.16NA
2018:50Calm10.00Mostly CloudyBKN0605046 88%30.16NA
2017:55Calm10.00Mostly CloudyBKN0605246 82%30.15NA
2016:50Calm10.00Mostly CloudyBKN0605446 77%30.15NA
2015:55E 710.00Mostly CloudyBKN2005546 72%30.15NA
2012:50SE 510.00ClearSKC5546 72%30.16NA
2010:50E 1210.00ClearSKC5045 82%30.21NA
2009:55E 1210.00ClearSKC4845 87%30.20NA
2008:50E 97.00A Few CloudsFEW2504343 100%30.20NA
2007:50E 74.00 Fog/MistFEW2003939 100%30.20NA
2006:50E 33.00 Shallow Fog Fog/MistSCT2003636 100%30.20NA
2005:45NE 33.00 Fog/MistCLR3636 3835100%30.19NA
2004:05Calm3.00 Fog/MistCLR3535 100%30.19NA
2003:45Calm4.00 Fog/MistCLR3636 100%30.19NA
2002:25Calm5.00 Fog/MistCLR3737 100%30.19NA
2001:45Calm4.00 Fog/MistCLR3737 100%30.18NA
2001:25Calm2.50 Fog/MistCLR3737 100%30.18NA
2001:05Calm3.00 Fog/MistCLR3737 100%30.18NA
2000:45Calm2.50 Fog/MistCLR3737 100%30.19NA
2000:25Calm4.00 Fog/MistCLR3737 100%30.18NA
2000:05Calm3.00 Fog/MistCLR3737 100%30.18NA
1923:45Calm4.00 Fog/MistCLR3838 4737100%30.18NA
1923:25Calm4.00 Fog/MistCLR3737 100%30.18NA
1923:05Calm5.00 Fog/MistCLR3837 99%30.18NA
1922:45Calm3.00 Fog/MistCLR3938 99%30.18NA
D
a
t
e
Time
(cst)
Wind
(mph)
Vis.
(mi.)
WeatherSky Cond. AirDwptMax.Min.Relative
Humidity
altimeter
(in.)
sea level
(mb)
1 hr3 hr6 hr
6 hour
Temperature (ºF)PressurePrecipitation (in.)

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Last Modified: June 14, 2005
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