National Weather Service

News Headlines

NWS St. Louis 2026 Spotter Talk Schedule Now Available!

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Partly Cloudy

45°F

7°C

Humidity	88%
Wind Speed	W 10 mph
Barometer	29.74 in
Dewpoint	42°F (6°C)
Visibility	10.00 mi
Wind Chill	40°F (4°C)
Last update	14 Jan 3:15 am CST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Saint Jacob IL

Overnight
Low: 38 °F
Cloudy
Wednesday
High: 39 °F⇓
Gradual
Clearing and
Breezy
Wednesday Night
Low: 18 °F
Mostly Clear
Thursday
High: 33 °F
Sunny
Thursday Night
Low: 26 °F
Chance Snow
Friday
High: 44 °F
Partly Sunny
then Mostly
Cloudy and
Breezy
Friday Night
Low: 19 °F
Mostly Cloudy
Saturday
High: 27 °F
Partly Sunny
Saturday Night
Low: 9 °F
Partly Cloudy

Detailed Forecast

Overnight

Cloudy, with a low around 38. West wind 9 to 13 mph, with gusts as high as 26 mph.

Wednesday

Cloudy through mid morning, then gradual clearing, with a temperature falling to around 29 by 5pm. Breezy, with a northwest wind 14 to 23 mph, with gusts as high as 37 mph.

Wednesday Night

Mostly clear, with a low around 18. Northwest wind 9 to 16 mph, with gusts as high as 28 mph.

Thursday

Sunny, with a high near 33. Northwest wind 6 to 8 mph becoming south in the afternoon.

Thursday Night

A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 26. South wind 6 to 13 mph, with gusts as high as 21 mph.

Friday

Partly sunny, with a high near 44. Breezy.

Friday Night

Mostly cloudy, with a low around 19.

Saturday

Partly sunny, with a high near 27.