Hazardous Weather Conditions
Current conditions at
Newton Municipal Airport - Earl Johnson Field (KTNU)
Lat: 41.67°NLon: 93.02°WElev: 945ft.
Fair
93°F
34°C
| Humidity | 47% |
| Wind Speed | SW 9 mph |
| Barometer | 29.92 in |
| Dewpoint | 70°F (21°C) |
| Visibility | 10.00 mi |
| Heat Index | 99°F (37°C) |
| Last update | 1 Sep 2:55 pm CDT |
Extended Forecast for
Colfax IA
Heat Advisory September 1, 03:10pm until September 3, 07:00pm
NOW until 7:00pm Thu

Heat Advisory
This Afternoon

High: 94 °F
Sunny
Tonight

Low: 74 °F
Mostly Clear
Wednesday

High: 94 °F
Sunny
Wednesday Night

Low: 76 °F
Mostly Clear
Thursday

High: 92 °F
Mostly Sunny
Thursday Night

Low: 74 °F
Mostly Clear
Friday

High: 92 °F
Mostly Sunny
Friday Night

Low: 73 °F
Mostly Clear
Detailed Forecast
This Afternoon
Sunny, with a high near 94. Heat index values as high as 101. South southwest wind around 7 mph.
Tonight
Mostly clear, with a low around 74. South wind around 7 mph.
Wednesday
Sunny, with a high near 94. Heat index values as high as 103. Southwest wind 6 to 10 mph.
Wednesday Night
Mostly clear, with a low around 76. South wind around 7 mph.
Thursday
Mostly sunny, with a high near 92. Light south wind increasing to 5 to 9 mph in the morning.
Thursday Night
Mostly clear, with a low around 74.
Friday
Mostly sunny, with a high near 92.
Friday Night
Mostly clear, with a low around 73.
Saturday
Mostly sunny, with a high near 93.
Saturday Night
Partly cloudy, with a low around 72.
Sunday
A 40 percent chance of showers. Mostly sunny, with a high near 89.
Sunday Night
Partly cloudy, with a low around 69.
Labor Day
Partly sunny, with a high near 85.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Colfax IA
41.69°N 93.25°W
41.69°N 93.25°W
1:51 pm CDT Sep 1, 2026
3pm CDT Sep 1, 2026-6pm CDT Sep 7, 2026



