Irwin, IA Weather Forecast | 5 Day
Updated: Thu Sep 17th 2026 2:00 PM CDT
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Fog
Thu 9-17-26
Fog with a high of 75°F and a low of 62°F. Rainfall expected to have a 57% chance with an estimated 0.02in. Wind will be moderate, blowing around 12mph on average and gusts of 22.1mph at 11 PM. High humidity with average of 88% is anticipated, the maximum being 96% at 11 PM and 68% being its lowest at 3 PM. Barometric pressure is its highest of 30.18inHg at 9 PM, a lowest point of 30.15inHg at 5 PM with an avg 30.16inHg.
- HI: 75°F
- LO: 62°F
- Rainfall: 57% | est. 0.02in
- Snowfall: 0%
- Wind
11.6 mph - Humidity
88% avg. - UV Index
4.5 - Air QualityGood
- Sunrise
07:03 AM - Sunset
07:27 PM - Moonrise
02:31 PM - Moonset
11:01 PM - Moon Phase
First Quarter
Light Rain Shower
Weather Tomorrow, Fri 9-18-26
Light Rain Shower with a high of 89°F and a low of 63°F. It will likey rain, having a 83% chance of a downpour with an estimated 0.38in. Wind will be moderate, blowing around 18mph on average and gusts of 37mph at 9 PM. High humidity with average of 83% is anticipated, the maximum being 98% at 12 AM and 56% being its lowest at 4 PM. Barometric pressure is its highest of 30.16inHg at 12 AM, a lowest point of 29.83inHg at 6 PM with an avg 29.98inHg.
- HI: 89°F
- LO: 63°F
- Rainfall: 83% | est. 0.38in
- Snowfall: 0%
- Wind
17.4 mph - Humidity
83% avg. - UV Index
6.5 - Air QualityGood
- Sunrise
07:04 AM - Sunset
07:25 PM - Moonrise
03:25 PM - Moonset
11:56 PM - Moon Phase
First Quarter
Overcast
Sat 9-19-26
Overcast with a high of 76°F and a low of 57°F. It will likey rain, having a 88% chance of a downpour with an estimated 0.78in. Wind will be moderate, blowing around 13mph on average and gusts of 23.1mph at 9 PM. High humidity with average of 87% is anticipated, the maximum being 98% at 11 PM and 73% being its lowest at 2 PM. Barometric pressure is its highest of 29.91inHg at 10 PM, a lowest point of 29.82inHg at 7 AM with an avg 29.85inHg.
- HI: 76°F
- LO: 57°F
- Rainfall: 88% | est. 0.78in
- Snowfall: 0%
- Wind
13 mph - Humidity
87% avg. - UV Index
6.5 - Air QualityGood
- Sunrise
07:05 AM - Sunset
07:23 PM - Moonrise
04:10 PM - Moonset
Does not set today - Moon Phase
First Quarter
Overcast
Sun 9-20-26
Overcast with a high of 58°F and a low of 53°F. It will likey rain, having a 85% chance of a downpour with an estimated 0.12in. Wind will be moderate, blowing around 13mph on average and gusts of 19.5mph at 3 AM. High humidity with average of 92% is anticipated, the maximum being 98% at 12 AM and 87% being its lowest at 10 AM. Barometric pressure is its highest of 30.03inHg at 11 PM, a lowest point of 29.93inHg at 5 AM with an avg 29.96inHg.
- HI: 58°F
- LO: 53°F
- Rainfall: 85% | est. 0.12in
- Snowfall: 0%
- Wind
12.1 mph - Humidity
92% avg. - UV Index
1.4 - Air QualityGood
- Sunrise
07:06 AM - Sunset
07:22 PM - Moonrise
04:46 PM - Moonset
12:57 AM - Moon Phase
Waxing Gibbous
Mist
Mon 9-21-26
Mist with a high of 60°F and a low of 53°F. Rainfall expected to have a 70% chance with an estimated 0.06in. Wind will be moderate, blowing around 14mph on average and gusts of 17mph at 10 AM. High humidity with average of 88% is anticipated, the maximum being 98% at 6 AM and 69% being its lowest at 4 PM. Barometric pressure is its highest of 30.09inHg at 12 PM, a lowest point of 29.93inHg at 4 AM with an avg 29.99inHg.
- HI: 60°F
- LO: 53°F
- Rainfall: 70% | est. 0.06in
- Snowfall: 0%
- Wind
13.4 mph - Humidity
88% avg. - UV Index
4 - Air QualityGood
- Sunrise
07:07 AM - Sunset
07:20 PM - Moonrise
05:16 PM - Moonset
02:00 AM - Moon Phase
Waxing Gibbous
Sunny
Tue 9-22-26
Sunny with a high of 72°F and a low of 53°F. There's a moderate 27% chance of rainfall with an estimated 0.01in. Wind will be moderate, blowing around 13mph on average and gusts of 29.3mph at 10 PM. The humidity will be on the higher side, averaging about 80%, the maximum being 95% at 1 AM and 58% being its lowest at 4 PM. Barometric pressure is its highest of 30.04inHg at 7 AM, a lowest point of 29.89inHg at 11 PM with an avg 29.98inHg.
- HI: 72°F
- LO: 53°F
- Rainfall: 27% | est. 0.01in
- Snowfall: 0%
- Wind
12.3 mph - Humidity
80% avg. - UV Index
6 - Air QualityTBA
- Sunrise
07:08 AM - Sunset
07:18 PM - Moonrise
05:41 PM - Moonset
03:03 AM - Moon Phase
Waxing Gibbous
This 5-Day weather forecast is valid for ZIP code 51446, accurately covering the area of Irwin, IA.
Currently
 |
74°F |
30.18 inHg.
Barometer 69%
Humidity NNE 7.6 mph Wind |
| Patchy Rain Nearby | ||
National Outlook
More Flash Flooding Expected in the Southwest and Plains: 09-17 to 09-19
Thu Sep 17th 2026, 5:06am PDT
Read
Rain and Storms Hit Midwest and East, Monsoon in the South 09-19 to 09-23
Extended Forecast
Thu Sep 17th 2026, 5:10am PDT
Read
Thu Sep 17th 2026, 5:10am PDT
5 Day Forecast Nearby
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