Irwin (PA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Irwin.
Climate overview of Irwin
Irwin, Pennsylvania, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 29°C (84°F) in July, while winters cool to 3°C (37°F) in February.
The city has a wet climate, receiving around 1172 mm (46 in) of rain/snowfall per year. June is the wettest month. The most sunshine falls in July, with an average of 8.5 hours of daily sunshine.
Irwin Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Irwin — and find the best time to visit.
Monthly Temperature in Irwin
Depending on the time of the year, temperatures range from comfortable to chilly in Irwin. On average, daytime temperatures range from a comfortable 29°C (84°F) in July to a chilly 3°C (37°F) in February.
Nighttime temperatures range from 17°C (63°F) in July to -7°C (19°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Irwin
Irwin has a relatively rain/snowy climate with high precipitation levels, averaging 1172 mm (46 in) of rain/snowfall annually. The amount of precipitation varies moderately throughout the year. The wettest month, June, sees around 145 mm (5.7 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, February, still receives a respectable 67 mm (2.6 in) of snow/rainfall. For more details, please visit our Irwin Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Irwin
In Irwin, summer days are longer and more sunny, with daily sunshine hours peaking at 8.5 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 2.4 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Irwin by Month
The relative humidity is high throughout the year in Irwin.
The city experiences its highest humidity in September, reaching 72%. In April, the humidity drops to its lowest level at 59%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Irwin
Rainfall during this time ranges from 90 mm (3.5 in) in September to 145 mm (5.7 in) in June. This means you can expect a mix of sunny days and occasional showers. Seeking the perfect travel destination for this year? We've created a tool that suggests locations matching your desired weather. Let our weather planner guide your travel decisions.
Frequently asked questions about the climate in Irwin
What is the best time to visit Irwin?
September typically offers the most optimal weather in Irwin. In contrast, January, February, March and December tend to have less optimal conditions.
What temperatures can I expect in Irwin?
Daytime highs range from 3°C (37°F) in February to 29°C (84°F) in July. Nighttime lows range from -7°C (19°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Irwin get?
Annual rainfall is around 1172 mm (46 in). June is the wettest month with 145 mm (5.7 in), while February is the driest with 67 mm (2.6 in).
How sunny is Irwin?
Irwin receives around 2,029 hours of sunshine per year. July is the sunniest month with 255 hours, while December is the cloudiest with just 73 hours. Overall, Irwin enjoys abundant sunshine.
Irwin 3-Day Forecast
Irwin (PA) 3-Day Forecast
Irwin on the map
Irwin is highlighted — select any city to see its climate.
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