Barnhart, MO 63012 Monthly Weather

Jefferson County7:05 PM CDT38.34°N, 90.41°W
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October 2026

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192°/68°0.48 inAvg 76°/52°
273°/54°<0.01 inAvg 75°/51°
376°/49°Avg 75°/51°
481°/45°Avg 74°/50°
577°/45°Avg 74°/50°
680°/42°Avg 74°/50°
790°/48°Avg 73°/49°
886°/48°Avg 73°/49°
990°/48°Avg 72°/49°
1083°/50°Avg 72°/48°
1186°/47°Avg 72°/48°
1293°/56°Avg 71°/48°
1394°/63°Avg 71°/47°
1481°/65°0.70 inAvg 70°/47°
1582°/57°0.52 inAvg 70°/46°
1659°/51°0.20 inAvg 70°/46°
1759°/38°Avg 69°/46°
1867°/35°Avg 69°/45°
1972°/36°Avg 68°/45°
20Avg 68°/45°
21 Sunny 75°/46°Avg 67°/44°
22 Sunny 77°/47°Avg 67°/44°
23 Sunny 76°/46°Avg 66°/44°
24 Mostly Sunny 76°/47°Avg 66°/43°
25 Partly Sunny 78°/48°Avg 66°/43°
26 Partly Sunny 77°/49°Avg 65°/42°
27 Partly Sunny 71°/47°Avg 65°/42°
28 Partly cloudy 80°/51°Avg 64°/42°
29 Rain 73°/50°Avg 64°/41°
30 Sunny 61°/41°Avg 63°/41°
31Avg 63°/41°
Average high80° (normal 72°)
Average low50° (normal 48°)
Warmest / coldest94° / 35°
Precipitation1.90 in (normal 1.80 in to date)
Record high today85° (2017)
Record low today25° (2018)

Observed: Cahokia St Louis Downtown Ap, 34 km away, records since 1997. Normals 1991–2020. Climate data from NOAA's Regional Climate Centers (ACIS); recent days are preliminary. Days ahead: the forecast.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.