Climate and monthly weather forecastIris, SC
Climate and monthly weather forecast
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 »Updated: Aug 5, 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
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).
In Iris, during the entire year, the rain falls for 160.1 days and collects up to 33.94" (862mm) of precipitation.
Months with snowfall are January through March and December.
In Iris, during the entire year, snow falls for 2 days and aggregates up to 1.81" (46mm) of snow.
January is the month with the lowest UV index, with an average maximum UV index of 2.
February is the month with the most snowfall. Snow falls for 0.7 days and accumulates 0.94" (24mm) of snow.
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.
In Iris, snow does not fall in April through November.
With an average of 14h and 24min of daylight, June has the longest days of the year.
The months with the highest UV index in Iris are June and August, with an average maximum UV index of 7.
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).
With an average relative humidity of 70%, July is the least humid month.
The month with the most sunshine is July, with an average of 10.9h of sunshine.
The month with the least rainfall is September, when the rain falls for 11.8 days and typically collects 1.61" (41mm) of precipitation.
The most humid month is December, with an average relative humidity of 77%.
December is the month with the most rainfall. Rain falls for 12.3 days and accumulates 3.74" (95mm) of precipitation.
With an average of 9h and 54min of daylight, December has the shortest days of the year.
December has the least sunshine of the year, with an average of 5.3h of sunshine.
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 in January:
30.14"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
30.02"Hg - Average pressure in May:
30.03"Hg - Average pressure in June:
29.98"Hg
- Average pressure in July:
30.01"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.15"Hg - Average pressure in December:
30.14"Hg
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 in January:
7.2mph - Average wind speed in February:
7.3mph - Average wind speed in March:
7.1mph - Average wind speed in April:
7.2mph - Average wind speed in May:
5.8mph - Average wind speed in June:
5.2mph
- Average wind speed in July:
4.8mph - Average wind speed in August:
4.5mph - Average wind speed in September:
5.2mph - Average wind speed in October:
6.1mph - Average wind speed in November:
6.3mph - Average wind speed in December:
6.8mph
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 humidity
Iris, SC
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (70%).
Average rainfall
Iris, SC
- Average rainfall in January:
2.87" - Average rainfall in February:
2.91" - Average rainfall in March:
2.68" - Average rainfall in April:
3.03" - Average rainfall in May:
3.23" - Average rainfall in June:
2.52"
- Average rainfall in July:
2.91" - Average rainfall in August:
3.54" - Average rainfall in September:
1.61" - Average rainfall in October:
2.24" - Average rainfall in November:
2.64" - Average rainfall in December:
3.74"
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 in January:
12.5 days - Average rainfall days in February:
12.1 days - Average rainfall days in March:
14.3 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
14.8 days - Average rainfall days in June:
14.8 days
- Average rainfall days in July:
17.9 days - Average rainfall days in August:
17 days - Average rainfall days in September:
11.8 days - Average rainfall days in October:
9.1 days - Average rainfall days in November:
9.7 days - Average rainfall days in December:
12.3 days
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
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 in January:
0.8 days - Average snowfall days in February:
0.7 days - Average snowfall days in March:
0.2 days - Average snowfall days in April:
0 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 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0.3 days
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 in January:
10h and 12min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 6min - Average daylight in May:
14h and 0min - Average daylight in June:
14h and 24min
- Average daylight in July:
14h and 12min - Average daylight in August:
13h and 24min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 24min - Average daylight in December:
9h and 54min
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).
- Average sunshine in January:
5h and 36min - Average sunshine in February:
6h and 54min - Average sunshine in March:
7h and 18min - Average sunshine in April:
8h and 54min - Average sunshine in May:
9h and 54min - Average sunshine in June:
10h and 48min
- Average sunshine in July:
10h and 54min - Average sunshine in August:
10h and 12min - Average sunshine in September:
8h and 30min - Average sunshine in October:
6h and 48min - Average sunshine in November:
5h and 54min - Average sunshine in December:
5h and 18min
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 in January:
17.6 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
15.1 days - Average sunshine days in April:
14.8 days - Average sunshine days in May:
14 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
10.3 days - Average sunshine days in August:
11.2 days - Average sunshine days in September:
17 days - Average sunshine days in October:
20.8 days - Average sunshine days in November:
19 days - Average sunshine days in December:
16.8 days
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 UV index
Iris, SC
The months with the highest UV index are June and August (UV index 7).
The month with the lowest UV index is January (UV index 2).
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
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).
