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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, is another cold winter month in Irwin, Pennsylvania, with an average temperature varying between 33.6°F (0.9°C) and 20.7°F (-6.3°C). Irwin experiences its lowest average temperatures in January, reaching a peak of 33.6°F (0.9°C) and a minimum of 20.7°F (-6.3°C). Weather in January »
Weather in February
February, the last month of the winter in Irwin, is another cold month, with an average temperature fluctuating between 23.4°F (-4.8°C) and 37.6°F (3.1°C). The commencement of February records an average high-temperature of a still cold 37.6°F (3.1°C), barely varying from January's 33.6°F (0.9°C). Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Irwin, Pennsylvania, with an average temperature fluctuating between 47.8°F (8.8°C) and 31.3°F (-0.4°C). March brings a rise in the average high-temperature, transitioning from February's wintry 37.6°F (3.1°C) to a frosty 47.8°F (8.8°C). Weather in March »
Weather in April
April is a mild spring month in Irwin, Pennsylvania, with temperature in the range of an average high of 60.1°F (15.6°C) and an average low of 41.4°F (5.2°C). The shift into April is accompanied by a temperature increase, with the average high-temperature rising from a chilly 47.8°F (8.8°C) in March to a mild 60.1°F (15.6°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Irwin, Pennsylvania, with an average temperature varying between 51.4°F (10.8°C) and 71.8°F (22.1°C). The start of May brings a shift in the average high-temperature, increasing from April's refreshing 60.1°F (15.6°C) to a pleasant 71.8°F (22.1°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in Irwin, Pennsylvania, with an average temperature varying between 78.6°F (25.9°C) and 57.7°F (14.3°C). June's arrival coincides with a marginal rise in the average high-temperature, moving from May's agreeable 71.8°F (22.1°C) to a moderately hot 78.6°F (25.9°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Irwin, Pennsylvania, with an average temperature fluctuating between 82.9°F (28.3°C) and 61.5°F (16.4°C). Irwin reaches its highest average temperatures in July, measuring 82.9°F (28.3°C) at the peak and 61.5°F (16.4°C) at the lowest. Throughout July, the heat index is estimated at a hot 89.6°F (32°C). Weather in July »
Weather in August
August, the last month of the summer in Irwin, is another warm month, with an average temperature varying between 81.5°F (27.5°C) and 60.1°F (15.6°C). The commencement of August introduces an average high-temperature of a still warm 81.5°F (27.5°C), closely mirroring the preceding month. Weather in August »
Weather in September
September, the first month of the autumn in Irwin, is also a moderately hot month, with an average temperature varying between 55°F (12.8°C) and 75.4°F (24.1°C). Irwin's transition into September involves a gentle shift in temperature, receding from 81.5°F (27.5°C) in August to a still moderately hot 75.4°F (24.1°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Irwin, Pennsylvania, with an average temperature ranging between max 62.1°F (16.7°C) and min 45.3°F (7.4°C). October's arrival corresponds with a decrease in average high-temperatures, from September's warm 75.4°F (24.1°C) to a refreshing 62.1°F (16.7°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Irwin, Pennsylvania, with temperature in the range of an average low of 34°F (1.1°C) and an average high of 49.5°F (9.7°C). The shift from October to November corresponds with a decrease in the average high-temperature, down to a frosty 49.5°F (9.7°C) from a refreshing 62.1°F (16.7°C). Weather in November »
Weather in December
December, the first month of the winter in Irwin, is also an icy month, with temperature in the range of an average high of 39.6°F (4.2°C) and an average low of 28.6°F (-1.9°C). A shift in Irwin's weather is observed as November turns into December, with the average high temperature reducing from a chilly 49.5°F (9.7°C) to a cold 39.6°F (4.2°C). Weather in December »
Updated: Aug 2, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
Irwin experiences its lowest temperatures in January, with an average peak of 33.6°F (0.9°C) and a low of 20.7°F (-6.3°C).
What is the driest month?
January and November are months with the least rain when the rain falls for 9.1 days and typically aggregates up to 1.14" (29mm) of rain.
How much does it rain in Irwin?
Throughout the year, there are 161.9 rainfall days, and 19.29" (490mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through April, October through December.
What is the snowiest month?
January is the month with the most snowfall. Snow falls for 14.2 days and accumulates 2.13" (54mm) of snow.
How many days does it snow?
In Irwin, during the entire year, snow falls for 49.2 days and aggregates up to 8.62" (219mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year, with an average of 3h of sunshine.
What is the most humid month?
The most humid month is February, with an average relative humidity of 85%.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What are the least humid months?
April, July and August, with an average relative humidity of 76%, are the least humid months.
What is the rainiest month?
The month with the most rainfall is May, when the rain falls for 18.3 days and typically aggregates up to 2.28" (58mm) of precipitation.
When it does not snow?
May through September are months without snowfall.
What is the month with the highest UV index?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
When are the longest days?
The month with the longest days is June, with an average of 15h and 0min of daylight.
What are the warmest months?
July, recording an average high temperature of 82.9°F (28.3°C) and a low temperature of 61.5°F (16.4°C), is Irwin's warmest month.
What month has the most sunshine?
August has the most sunshine of the year, with an average of 10.3h of sunshine.
What is the month with the shortest days?
With an average of 9h and 24min of daylight, December has the shortest days of the year.
When is the lowest UV index?
With an average maximum UV index of 1, December is the month with the lowest UV index.
Average temperature
Irwin, PA
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (33.6°F).
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure
Irwin, PA
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed
Irwin, PA
- Average wind speed in January:
8mph - Average wind speed in February:
7.8mph - Average wind speed in March:
7.3mph - Average wind speed in April:
7.5mph - Average wind speed in May:
6.1mph - Average wind speed in June:
5.6mph
- Average wind speed in July:
4.8mph - Average wind speed in August:
4.7mph - Average wind speed in September:
5.1mph - Average wind speed in October:
6.3mph - Average wind speed in November:
6.8mph - Average wind speed in December:
7.4mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity
Irwin, PA
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, July and August (76%).
Average rainfall
Irwin, PA
- Average rainfall in January:
1.14" - Average rainfall in February:
1.3" - Average rainfall in March:
1.26" - Average rainfall in April:
1.97" - Average rainfall in May:
2.28" - Average rainfall in June:
2.2"
- Average rainfall in July:
2.13" - Average rainfall in August:
1.57" - Average rainfall in September:
1.38" - Average rainfall in October:
1.46" - Average rainfall in November:
1.14" - Average rainfall in December:
1.46"
The wettest month (with the highest rainfall) is May (2.28").
The driest months (with the least rainfall) are January and November (1.14").
Average rainfall days
Irwin, PA
- Average rainfall days in January:
9.1 days - Average rainfall days in February:
9.3 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
15.5 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
16.3 days
- Average rainfall days in July:
17.2 days - Average rainfall days in August:
15.8 days - Average rainfall days in September:
12.8 days - Average rainfall days in October:
13.8 days - Average rainfall days in November:
9.8 days - Average rainfall days in December:
11.2 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (9.1 days).
Average snowfall
Irwin, PA
The month with the highest snowfall is January (2.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Irwin, PA
- Average snowfall days in January:
14.2 days - Average snowfall days in February:
11.8 days - Average snowfall days in March:
7 days - Average snowfall days in April:
1.9 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.2 days - Average snowfall days in November:
4 days - Average snowfall days in December:
10.1 days
The month with the highest number of snowfall days is January (14.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Irwin, PA
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
3h and 0min - Average sunshine in February:
3h and 4min - Average sunshine in March:
5h and 3min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 5min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
10h and 2min - Average sunshine in September:
8h and 4min - Average sunshine in October:
5h and 2min - Average sunshine in November:
4h and 5min - Average sunshine in December:
3h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days
Irwin, PA
- Average sunshine days in January:
11.3 days - Average sunshine days in February:
9 days - Average sunshine days in March:
11.8 days - Average sunshine days in April:
11.9 days - Average sunshine days in May:
10.3 days - Average sunshine days in June:
11.1 days
- Average sunshine days in July:
11.5 days - Average sunshine days in August:
13.1 days - Average sunshine days in September:
14.5 days - Average sunshine days in October:
14 days - Average sunshine days in November:
17 days - Average sunshine days in December:
12.1 days
The month with the most sunshine days is November (17 days).
The month with the least sunshine days is February (9 days).
Average UV index
Irwin, PA
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
Irwin, PA
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility
Irwin, PA
The months with the highest visibility are April, June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, May, September, October and December (5mi).
Irwin, Pennsylvania, USA
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