Irwin Weather in December

December in Irwin brings low temperatures, with daytime highs of 6°C (43°F) and nights around -3°C (27°F). Quite a bit of snow/rainfall is expected, around 114 mm (4.5 in), so pack an umbrella.

Rainfall in Irwin in December

Typically, about 18 days will experience snow/rainfall, with an average of 114 mm (4.5 in) for the month. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.

Temperature in Irwin in December

In December, Irwin gets low temperatures, with highs of 6°C (43°F). Nights cool to around -3°C (27°F). During December, the winter season is in full swing. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. With overnight lows of -3°C (27°F), temperatures fall below freezing at night. An extra thick blanket can make a real difference if your accommodation runs cold.

Sunshine in Irwin in December

This month sees fewer sunny days, with about 73 hours of sunshine, perfect for those who enjoy cooler temperatures.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Irwin. Our weather planner can help you explore destinations with more pleasant weather conditions.

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Check the conditions for any month of the year.

• January
• February
• March
• April

• 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 December

Min Temperature -3°C (27°F)  

Max Temperature 6°C (43°F)  

Chance of Rain 60%  

Precipitation 114 mm (4.5 in)  

Rainy days 18 days  

Humidity 72% *  

Sunshine 73 hours *  

Percentage Sunshine 26% *  

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

What to Wear in Irwin in December

Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Prepare for significant rainfall with proper waterproof clothing and shoes. Sunglasses aren't essential this month, though you might want them for the occasional bright moment.

What To Do in Irwin in December

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

Swimming

4/10

Cycling

4/10

Walking

4/10

Camping

1/10

Outdoor sports

4/10

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.