Newton, IA Weather Forecast
Jasper County, Iowa
Seven-day outlook
41–69°F across the weekThe week runs between 47° and 69°, with Sunday the warmest day of it. There is no real trend across it: one day looks much like the next. Saturday is the wettest day, peaking near 75%.
Forecasts come from the National Weather Service's own computer models, and current conditions from the nearest reporting weather station. Both are served through the weather API. A forecast is guidance, not a warning, and anything the Weather Service has actually issued is on the live map.
The written summaries on this page are generated from the forecast data above, not by a meteorologist. Each sentence is a reading of the same numbers you can see, and no forecaster has reviewed them.
About the Newton forecast
Newton sits at 41.6963°N, 93.0405°W in Jasper County, Iowa. The forecast above is drawn for that point from the National Weather Service's own computer models: a seven-day outlook, and a finer-grained one covering the next eighteen hours where it reaches, and the radar and alert panels show what the Weather Service has out over the area right now.
- County
- Jasper County
- Coordinates
- 41.6963°N, 93.0405°W
- Population
- 15,645 · 2023 estimate
- Land area
- 11.255 sq mi
Place data from the US Census Bureau. Coordinates are the Census internal point for Newton, and the forecast is for that location, not for every address inside the city limits, and a large city can have real weather differences from one side to the other.
How well can the network see Newton?
The nearest Doppler radar is KDMX (Des Moines, IA), 35 miles to the W. A WSR-88D's lowest routine scan sits half a degree above horizontal, and the earth curves away beneath it, so by the time that beam reaches Newton its center is about 2,200 ft above ground. That is comfortably inside the useful range. The lowest scan passes low enough over Newton to show rotation in the part of a storm where tornadoes actually form. Newton is closer to its radar than 63% of US cities.
The closest instrument actually measuring the air is KTNU · Newton Muni on the ASOS/AWOS network, 2.1 miles away. Close enough that its readings are, for practical purposes, the conditions in town.
Beam height is the standard 4/3-earth approximation for the 0.5° scan and assumes normal refraction; it is where the center of the beam is, not its edges, and unusual temperature profiles bend it. Radar siting from the NWS WSR-88D network, station positions from the Iowa observing network as of this build.
Forecasts near Newton
- Grinnell, IA16 mi
- Mitchellville, IA17 mi
- Pella, IA21 mi
- Bondurant, IA22 mi
- Altoona, IA23 mi
- Marshalltown, IA24 mi
- Pleasant Hill, IA25 mi
- Knoxville, IA26 mi
Elsewhere in Iowa
Des MoinesCedar RapidsDavenportSioux CityIowa CityAnkenyAll Iowa forecasts →