Arnold, MO Weather Forecast
Jefferson County, Missouri
Live radar, warnings and storm tracking for Arnold, with free alerts the moment it counts.
The next few hours
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
Free alerts for Arnold
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Arnold, MO at a glance
Arnold is home to about 21,059 people in Jefferson County, across 12 square miles. It ranks 34th by population of 211 places in Missouri with a forecast here. The nearest neighbour with its own forecast is Green Park, 7 miles away.
- County
- Jefferson County
- Population
- 21,059 2023 est.
- Land area
- 12 sq mi
- People per sq mi
- 1,827
- Forecast point
- 38.4260°N, 90.3693°W
How well can the network see Arnold?
The nearest Doppler radar is KLSX (St. Louis, MO), to the NW. Its lowest scan passes about 1,500 ft above Arnold. That is about as close as US radar coverage gets: low-level rotation and gust fronts over Arnold show up clearly. Arnold is closer to its radar than 77% of US cities.
The closest weather station is KCPS (St Louis/Downtown Arpt). Far enough that current conditions for Arnold are a reading from somewhere else.
Forecasts near Arnold
- Green Park, MO7 mi
- Sunset Hills, MO8 mi
- Fenton, MO8 mi
- Columbia, IL9 mi
- Crestwood, MO9 mi
- Pevely, MO10 mi
- Dupo, IL10 mi
- Kirkwood, MO11 mi
Elsewhere in Missouri
Kansas CitySt. LouisSpringfieldColumbiaIndependenceLee's SummitAll Missouri forecasts →