Climate and monthly weather forecast
Irwin, SC

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Weather in January

January, the same as December, in Irwin, South Carolina, is another chilly winter month, with an average temperature fluctuating between 35.2°F (1.8°C) and 49.8°F (9.9°C). Irwin experiences its lowest average temperatures in January, reaching a peak of 49.8°F (9.9°C) and a minimum of 35.2°F (1.8°C). Weather in January »

Weather in February

February, the last month of the winter in Irwin, is a cool month, with temperature in the range of an average low of 38.1°F (3.4°C) and an average high of 55°F (12.8°C). The average high-temperature is a cool 55°F (12.8°C) in February, hardly different from the 49.8°F (9.9°C) recorded in January. Weather in February »

Weather in March

The first month of the spring, March, is a comfortable month in Irwin, South Carolina, with an average temperature fluctuating between 44.2°F (6.8°C) and 62.1°F (16.7°C). March showcases a minor temperature ascent, adjusting from February's cool 55°F (12.8°C) to a comfortable 62.1°F (16.7°C). Weather in March »

Weather in April

April in Irwin, South Carolina, is a pleasant spring month, with an average temperature varying between 53.2°F (11.8°C) and 71.6°F (22°C). The rise of average high-temperatures is seen in April, with an increase from a comfortable 62.1°F (16.7°C) in March to a pleasant 71.6°F (22°C). Weather in April »

Weather in May

May, the last month of the spring in Irwin, is a moderately hot month, with an average temperature ranging between min 61°F (16.1°C) and max 79.9°F (26.6°C). In Irwin, the average high-temperature in May slightly increases from an agreeable 71.6°F (22°C) in April to a moderately hot 79.9°F (26.6°C). Weather in May »

Weather in June

The first month of the summer, June, is a hot month in Irwin, South Carolina, with an average temperature varying between 87.3°F (30.7°C) and 68.2°F (20.1°C). The arrival of June signals a slight increase in the average high-temperature, moving from a warm 79.9°F (26.6°C) in May to a hot 87.3°F (30.7°C). Weather in June »

Weather in July

July, the same as June, in Irwin, South Carolina, is another hot summer month, with an average temperature fluctuating between 90.3°F (32.4°C) and 71.2°F (21.8°C). The month of July sees the highest average temperatures, reaching 90.3°F (32.4°C) at the peak and 71.2°F (21.8°C) at the low. July's average heat index is computed to be a blisteringly hot 107.6°F (42°C). Weather in July »

Weather in August

August, the last month of the summer in Irwin, is another hot month, with an average temperature varying between 88.3°F (31.3°C) and 69.8°F (21°C). Irwin experiences an average high-temperature of a still hot 88.3°F (31.3°C) in August, marking an insignificant shift from 90.3°F (32.4°C) in July. Weather in August »

Weather in September

September, the first month of the autumn in Irwin, is still a warm month, with temperature in the range of an average high of 82.9°F (28.3°C) and an average low of 64.9°F (18.3°C). The beginning of September subtly marks a decrease in the average high-temperature, transitioning from a hot 88.3°F (31.3°C) in August to a moderately hot 82.9°F (28.3°C). Weather in September »

Weather in October

October, like September, is an agreeable autumn month in Irwin, South Carolina, with temperature in the range of an average high of 71.8°F (22.1°C) and an average low of 54.1°F (12.3°C). As October arrives, Irwin's weather displays a decrease in high-temperatures, transitioning from September's warm 82.9°F (28.3°C) to an agreeable 71.8°F (22.1°C). Weather in October »

Weather in November

The last month of the autumn, November, is another refreshing month in Irwin, South Carolina, with an average temperature ranging between min 43.5°F (6.4°C) and max 60.4°F (15.8°C). The shift from October to November involves a decrease in the average high-temperature, from a pleasant 71.8°F (22.1°C) to a refreshing 60.4°F (15.8°C). Weather in November »

Weather in December

December, the first month of the winter in Irwin, is still a cool month, with temperature in the range of an average high of 54.1°F (12.3°C) and an average low of 39.7°F (4.3°C). December heralds a minor drop in average high-temperature, sliding from November's mild 60.4°F (15.8°C) to a cool 54.1°F (12.3°C). Weather in December »
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Frequently asked questions

What is the coldest month in Irwin?

January, noted for its average high-temperature of 49.8°F (9.9°C) and an average low-temperature of 35.2°F (1.8°C), is considered the coldest month.

How many days does it rain in Irwin?

In Irwin, during the entire year, the rain falls for 120.6 days and collects up to 11.97" (304mm) of precipitation.

When does it snow in Irwin?

Months with snowfall in Irwin are January and February.

How much does it snow in Irwin?

Throughout the year, in Irwin, there are 1.2 snowfall days, and 0.2" (5mm) of snow is accumulated.

When is the lowest UV index in Irwin?

The month with the lowest UV index in Irwin, South Carolina, is January, with an average maximum UV index of 2.

When does it snow the most in Irwin?

February is the month with the most snowfall. Snow falls for 0.5 days and accumulates 0.12" (3mm) of snow.

When it does not snow in Irwin?

March through December are months without snowfall in Irwin.

When is Daylight Saving Time (DST) in Irwin?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Irwin, 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 most humid months in Irwin?

May and December, with an average relative humidity of 75%, are most humid months in Irwin, South Carolina.

What are the least humid months in Irwin?

The months with the lowest humidity in Irwin are June, July and November, with an average relative humidity of 71%.

When are the longest days in Irwin?

June has the longest days of the year, with an average of 14h and 24min of daylight.

When is the highest UV index in Irwin?

The months with the highest UV index in Irwin, South Carolina, are June and July, with an average maximum UV index of 7.

What month is the hottest in Irwin?

Irwin's July weather, with an average high temperature of 90.3°F (32.4°C) and an average low temperature of 71.2°F (21.8°C), tends to be the warmest of the year.

What month has the most sunshine in Irwin?

With an average of 10.9h of sunshine, July has the most sunshine of the year in Irwin.

What is the rainiest month in Irwin?

The month with the most rainfall in Irwin is August, when the rain falls for 13.2 days and typically aggregates up to 1.61" (41mm) of precipitation.

What is the driest month in Irwin?

The month with the least rainfall in Irwin, South Carolina, is September, when the rain falls for 9.6 days and typically collects 0.51" (13mm) of precipitation.

What is the month with the shortest days in Irwin?

December has the shortest days of the year, with an average of 9h and 54min of daylight.

What is the month with the least sunshine in Irwin?

December has the least sunshine of the year, with an average of 5.5h of sunshine.

Average temperature
Irwin, SC

Average temperature - Irwin, SC

The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (49.8°F).

The month with the highest average low temperature is July (71.2°F).
The coldest month (with the lowest average low temperature) is January (35.2°F).

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Average pressure
Irwin, SC

Average pressure - Irwin, SC

The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

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Average wind speed
Irwin, SC

Average wind speed - Irwin, SC

The windiest months (with the highest average wind speed) are February and April (8mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

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Average humidity
Irwin, SC

Average humidity - Irwin, SC

The months with the highest relative humidity are May and December (75%).
The months with the lowest relative humidity are June, July and November (71%).

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Average rainfall
Irwin, SC

Average rainfall - Irwin, SC

The wettest month (with the highest rainfall) is August (1.61").
The driest month (with the least rainfall) is September (0.51").

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Average rainfall days
Irwin, SC

Average rainfall days - Irwin, SC

The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is November (5.9 days).

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Average snowfall
Irwin, SC

Average snowfall - Irwin, SC

The month with the highest snowfall is February (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days
Irwin, SC

Average snowfall days - Irwin, SC

The month with the highest number of snowfall days is February (0.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight / Average sunshine
Irwin, SC

Average daylight / Average sunshine - Irwin, SC

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

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Average sunshine days
Irwin, SC

Average sunshine days - Irwin, SC

The month with the most sunshine days is October (23.5 days).
The month with the least sunshine days is July (12.9 days).

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Average visibility
Irwin, SC

Average visibility - Irwin, SC

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Irwin, South Carolina, USA

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