Irwin Weather in September

Irwin in September sees high temperatures, with highs around 25°C (77°F) and overnight lows of 12°C (54°F). Rainfall is fairly high at around 90 mm (3.5 in) on average, so pack waterproofs just in case.

Rainfall in Irwin in September

The climate data from previous years indicates about 13 days of rain, averaging 90 mm (3.5 in) for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Irwin in September

Irwin in September has perfect weather. Days reach 25°C (77°F) and nights cool to 12°C (54°F). Overall, the month follows a fairly predictable daily temperature pattern. With overnight lows of 12°C (54°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Irwin in September

There are approximately 197 hours of sunshine this month, resulting in mostly clear days.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.

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• January
• February
• March
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• May
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• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Irwin's climate page.

Irwin Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 25°C (77°F)  

Chance of Rain 43%  

Precipitation 90 mm (3.5 in)  

Rainy days 13 days  

Humidity 72% *  

Sunshine 197 hours *  

Percentage Sunshine 53% *  

* Data from: Pittsburgh, the United States of America (47 KM, 29 Miles).

What to Wear in Irwin in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Irwin in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

9/10

Walking

9/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Irwin's climate page.

More climate data for Irwin

Temperature Rainfall Sunshine Humidity

See the full Irwin climate overview or explore weather in the United States of America.