Climate and monthly weather forecast
Iris, SC

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Weather in January

January, like December, in Iris, South Carolina, is a cool winter month, with an average temperature ranging between min 35.2°F (1.8°C) and max 51.6°F (10.9°C). With average high temperatures of 51.6°F (10.9°C) and lows of 35.2°F (1.8°C), January is the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is a refreshing month in Iris, South Carolina, with an average temperature ranging between max 55.9°F (13.3°C) and min 39°F (3.9°C). With February's arrival, Iris notes an average high-temperature of a refreshing 55.9°F (13.3°C), closely following the trend of the preceding month. Weather in February »

Weather in March

March, the first month of the spring in Iris, is an enjoyable month, with an average temperature ranging between min 44.6°F (7°C) and max 63.1°F (17.3°C). The arrival of March brings a soft temperature shift, with the average high-temperature nudging from a mild 55.9°F (13.3°C) in February to a comfortable 63.1°F (17.3°C). Weather in March »

Weather in April

April is an agreeable spring month in Iris, South Carolina, with an average temperature varying between 53.1°F (11.7°C) and 73.2°F (22.9°C). An increase in the average high-temperature marks April, moving from March's enjoyable 63.1°F (17.3°C) to an agreeable 73.2°F (22.9°C). Weather in April »

Weather in May

May, the last month of the spring in Iris, is a warm month, with an average temperature varying between 81.1°F (27.3°C) and 60.4°F (15.8°C). May witnesses a subtle temperature ascent, adjusting from an agreeable 73.2°F (22.9°C) in April to a moderately hot 81.1°F (27.3°C). Weather in May »

Weather in June

The first month of the summer, June, is a hot month in Iris, South Carolina, with an average temperature varying between 67.6°F (19.8°C) and 88.7°F (31.5°C). As Iris transitions into June, the average high-temperature is observed to slightly rise from a warm 81.1°F (27.3°C) in May to a hot 88.7°F (31.5°C). Weather in June »

Weather in July

July, the same as June, in Iris, South Carolina, is a hot summer month, with an average temperature varying between 91.9°F (33.3°C) and 70.7°F (21.5°C). July is the warmest month, exhibiting average temperatures of 91.9°F (33.3°C) at the peak and 70.7°F (21.5°C) at the base. The heat index in July is computed to be a blistering 111.2°F (44°C). Weather in July »

Weather in August

August, the last month of the summer in Iris, is another tropical month, with temperature in the range of an average low of 69.8°F (21°C) and an average high of 90.1°F (32.3°C). August's arrival brings an average high-temperature of a still hot 90.1°F (32.3°C), slightly deviating from July's 91.9°F (33.3°C). Weather in August »

Weather in September

September, the first month of the autumn in Iris, is still a warm month, with temperature in the range of an average high of 84.6°F (29.2°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 90.1°F (32.3°C) in August to a moderately hot 84.6°F (29.2°C). Weather in September »

Weather in October

October, the same as September, in Iris, South Carolina, is another pleasant autumn month, with temperature in the range of an average high of 73.2°F (22.9°C) and an average low of 53.6°F (12°C). Iris in October experiences a subtle temperature decline, with average high-temperatures reducing from a moderately hot 84.6°F (29.2°C) in September to an agreeable 73.2°F (22.9°C). Weather in October »

Weather in November

November, the last month of the autumn in Iris, is another refreshing month, with an average temperature fluctuating between 61.7°F (16.5°C) and 43.7°F (6.5°C). The onset of November entails a temperature shift, as the average high-temperature decreases from a pleasant 73.2°F (22.9°C) in October to a refreshing 61.7°F (16.5°C). Weather in November »

Weather in December

December, the first month of the winter in Iris, is also a fresh month, with an average temperature fluctuating between 39.7°F (4.3°C) and 54.5°F (12.5°C). The onset of December aligns with a soft reduction in the average high-temperature, gently falling from a comfortable 61.7°F (16.5°C) in November to a cool 54.5°F (12.5°C). Weather in December »

Frequently asked questions

What time of the year is the coldest?

Iris records the coldest temperatures in January, averaging a high of 51.6°F (10.9°C) and a low of 35.2°F (1.8°C).

How many days does it rain?

In Iris, during the entire year, the rain falls for 160.1 days and collects up to 33.94" (862mm) of precipitation.

When does it snow?

Months with snowfall are January through March and December.

How much does it snow?

In Iris, during the entire year, snow falls for 2 days and aggregates up to 1.81" (46mm) of snow.

What is the month with the lowest UV index?

January is the month with the lowest UV index, with an average maximum UV index of 2.

When does it snow the most?

February is the month with the most snowfall. Snow falls for 0.7 days and accumulates 0.94" (24mm) of snow.

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.

When it does not snow?

In Iris, snow does not fall in April through November.

When are the longest days?

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

What are the months with the highest UV index?

The months with the highest UV index in Iris are June and August, with an average maximum UV index of 7.

What is the hottest time of year?

July brings the highest temperatures in Iris, with an average high of 91.9°F (33.3°C) and an average low of 70.7°F (21.5°C).

What is the least humid month?

With an average relative humidity of 70%, July is the least humid month.

What month has the most sunshine?

The month with the most sunshine is July, with an average of 10.9h of sunshine.

What is the driest month in Iris?

The month with the least rainfall is September, when the rain falls for 11.8 days and typically collects 1.61" (41mm) of precipitation.

What is the most humid month?

The most humid month is December, with an average relative humidity of 77%.

What is the rainiest month?

December is the month with the most rainfall. Rain falls for 12.3 days and accumulates 3.74" (95mm) of precipitation.

What is the month with the shortest days?

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

What is the month with the least sunshine?

December has the least sunshine of the year, with an average of 5.3h of sunshine.

Average temperature
Iris, SC

Average temperature - Iris, SC

The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (51.6°F).

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (35.2°F).

Average pressure
Iris, SC

Average pressure - Iris, SC

The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

Average wind speed
Iris, SC

Average wind speed - Iris, SC

The windiest month (with the highest average wind speed) is February (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

Average rainfall
Iris, SC

Average rainfall - Iris, SC

The wettest month (with the highest rainfall) is December (3.74").
The driest month (with the least rainfall) is September (1.61").

Average rainfall days
Iris, SC

Average rainfall days - Iris, SC

The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is October (9.1 days).

Average snowfall
Iris, SC

Average snowfall - Iris, SC

The month with the highest snowfall is February (0.94").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days
Iris, SC

Average snowfall days - Iris, SC

The month with the highest number of snowfall days is January (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average daylight / Average sunshine
Iris, SC

Average daylight / Average sunshine - Iris, 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 18min).

Average sunshine days
Iris, SC

Average sunshine days - Iris, SC

The month with the most sunshine days is October (20.8 days).
The month with the least sunshine days is July (10.3 days).

Average cloud cover
Iris, SC

Average cloud cover - Iris, SC

The months with the most cloud cover are February and December (Cloud cover 42).
The months with the least cloud cover are June and October (Cloud cover 29).

Average visibility
Iris, SC

Average visibility - Iris, SC

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

Iris, South Carolina, USA

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