Climate and monthly weather forecastSimpsonville, SC
Climate and monthly weather forecast
The climate of Simpsonville
Simpsonville, located in South Carolina, USA, falls under the Humid Subtropical climate zone, as classified by the Köppen climate system. The identifier of this climate is Cfa, which denotes no dry season and hot summers. The city experiences a drastic variation in its climatological parameters leading to a change in weather conditions throughout the year.On assessing the data, it becomes evident that Simpsonville experiences high temperatures that range from 49.6°F (9.8°C) in January to 90.5°F (32.5°C) in July. The lowest temperature swings between 33.6°F (0.9°C) in January and rises to a peak of 69.1°F (20.6°C) in July. Relative humidity mostly remains over 70% throughout the year, reaching a peak of 77% in December. Rainfall fluctuates over the year, presenting 2.68" (68mm) in June and peaking at 4.09" (104mm) in December.
An exhaustive study of the climatic data also unveils some unique scenarios. July experiences the maximum temperature of the year at 90.5°F (32.5°C) and has 14.2 daylight hours. December, on the other hand, averages the maximum rainfall of 4.09" (104mm) and records the highest relative humidity of 77%.
The best time to visit Simpsonville
Combining sunshine, temperature, and rain data, the optimal time for a visit to Simpsonville would be from April to June. During this duration, the temperature varies between an average high of 71.2°F (21.8°C) to 87.6°F (30.9°C) and an average low from 51.4°F (10.8°C) to 65.8°F (18.8°C). The city receives quite substantial sunshine, between 9 hours a day in April and gradually stretching to 10.9 hours in June. Rainfall during this period is moderate and ranges between 2.68" (68mm) and 3.46" (88mm).The worst time to visit Simpsonville
The not-so-great time to plan a trip to Simpsonville seems to be in the colder months of November to January. Average high temperatures during this period drop down to between 60.1°F (15.6°C) and 49.6°F (9.8°C), while average lows descend to between 41.9°F (5.5°C) and 33.6°F (0.9°C). Precipitation in terms of rainfall tends to be heavy, especially in December with an average of 4.09" (104mm).Spring weather in Simpsonville
In Simpsonville, Spring season stretches from March to May and offers a welcome change in weather. Temperature during this season sees a significant surge with an average high rising from 61.2°F (16.2°C) in March to 79.3°F (26.3°C) in May and an average low escalating from 43.2°F (6.2°C) to 58.6°F (14.8°C). The city receives more sunlight, totaling up to 9.9 hours a day in May, and also encounters moderate rain showers, with rainfall ranging from 2.68" (68mm) to 3.46" (88mm).Summer weather in Simpsonville
Simpsonville engulfs itself in the warmth of the Summer season from June to August. This period witnesses high temperatures soaring to a peak of 90.5°F (32.5°C) in July and an average low temperature around 69.1°F (20.6°C). The monthly average sunlight surpasses 10 hours a day. Rainfall, while sporadic, can be occasionally heavy and ranges between 2.68" (68mm) and 3.39" (86mm).Autumn weather in Simpsonville
The colors of Autumn unfold from September to November. During these months, the weather gradually cools down in Simpsonville. Average high temperatures start dropping from 83.1°F (28.4°C) in September to 60.1°F (15.6°C) by November, whereas the average low descends from 63.3°F (17.4°C) to 41.9°F (5.5°C), respectively. Despite a reduction in sunshine to 5.9 hours by November, the rainfall increases slightly to 2.99" (76mm).Winter weather in Simpsonville
Winter sets in Simpsonville from December to February. This season records the coldest of the temperatures, with an average high temperature plummeting to 49.6°F (9.8°C) in January and the average low temperature to 33.6°F (0.9°C) around the same time. Despite the chilly conditions, the city receives an average of 5.4 hours of sunlight in December. Rainfall records its highest reading of 4.09" (104mm) amidst the cold December winter.Weather in January
January in Simpsonville, South Carolina sees the arrival of the new year with chilling temperatures. Typically colder than the following month, this month experiences high and low temperatures of 49.6°F (9.8°C) and 33.6°F (0.9°C) respectively. Weather in January »Weather in February
The last month of the winter, February, is a fresh month in Simpsonville, South Carolina, with an average temperature varying between 54.1°F (12.3°C) and 37°F (2.8°C). The transition into February marks the average high-temperature at a cool 54.1°F (12.3°C), differing minimally from January's 49.6°F (9.8°C). Weather in February »Weather in March
The first month of the spring, March, is a refreshing month in Simpsonville, South Carolina, with an average temperature varying between 61.2°F (16.2°C) and 43.2°F (6.2°C). March introduces a marginal temperature uplift, with average high-temperatures adjusting from February's fresh 54.1°F (12.3°C) to an enjoyable 61.2°F (16.2°C). Weather in March »Weather in April
April in Simpsonville, South Carolina, exhibits a pleasant spring weather. High temperatures of 71.2°F (21.8°C) make this month much warmer compared to the previous month, essentially marking the midpoint of spring. Outdoor picnics and garden events become a common sight with 13.1 hours of daylight available. Weather in April »Weather in May
As summer approaches, May brings a significant rise in the temperature in Simpsonville, South Carolina. This month acts as a bridge between spring and summer, with a distinct increase in heat compared to April. Despite the rising heat, the humidity levels remain comfortable, ensuring a pleasant climate. Weather in May »Weather in June
June in Simpsonville, South Carolina marks the official start of summer with the highest daylight hours of the whole year, around 14.5. Compared to May, the temperature further increases, prompting people to beat the heat at swimming pools and water parks. Weather in June »Weather in July
Nothing screams summer in Simpsonville, South Carolina like the soaring temperatures of July. As the peak of summer, July boasts the highest temperature of the year with a maximum reaching up to 90.5°F (32.5°C). The days are long and nights warm, giving residents ample opportunity to enjoy summer activities both day and night. Weather in July »Weather in August
August in Simpsonville, South Carolina continues the summer season, with temperatures marginally cooler than in July. This month is a subtle reminder of the impending autumn, yet the summer heat lingers on, providing residents with enough opportunities to relish the sun. Weather in August »Weather in September
September brings relief from the summer heat to Simpsonville, South Carolina as temperatures cool down to a high of 83.1°F (28.4°C). This is the month when fall season officially starts, transitioning Simpsonville into a period of cooler months. Weather in September »Weather in October
October's weather in Simpsonville, South Carolina is all about pleasant fall temperatures. Compared to September, weather becomes even cooler inviting residents outdoors to enjoy the breathtaking fall foliage. With Halloween around the corner, it is the perfect weather to put on a light sweater and take part in trick-or-treat activities around the city. Weather in October »Weather in November
November in Simpsonville, South Carolina is a prelude to the approaching winter season. This month often sees a significant dip in temperature compared to October, highlighting the shift towards chillier months. The days become shorter and the number of daylight hours dwindle, signaling the start of winter. Weather in November »Weather in December
December in Simpsonville, South Carolina welcomes the true winter season. The temperature drops considerably from November, with typical high and low temperatures being 52.9°F (11.6°C) and 38.5°F (3.6°C) respectively. The days remain short and nights long, giving residents a preview of the year-end festivities. Weather in December »Updated: Jul 20, 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
In Simpsonville, the average lowest temperatures are observed in January, with a high of 49.6°F (9.8°C) and a low of 33.6°F (0.9°C).
In Simpsonville, during the entire year, the rain falls for 163.9 days and collects up to 35.51" (902mm) of precipitation.
Months with snowfall are January through March, November and December.
Throughout the year, there are 3.7 snowfall days, and 4.17" (106mm) of snow is accumulated.
With an average maximum UV index of 2, January is the month with the lowest UV index.
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.
April through October are months without snowfall.
May through August, with an average maximum UV index of 6, are months with the highest UV index.
June has the longest days of the year, with an average of 14h and 24min of daylight.
July, marked by an average high-temperature of 90.5°F (32.5°C) and a low-temperature of 69.1°F (20.6°C), is the warmest month in Simpsonville.
The least humid month is July, with an average relative humidity of 69%.
July has the most sunshine of the year in Simpsonville, with an average of 11.1h of sunshine.
The month with the least rainfall is September, when the rain falls for 12 days and typically collects 1.65" (42mm) of precipitation.
With an average relative humidity of 77%, December is the most humid month.
The month with the most rainfall is December, when the rain falls for 11.7 days and typically aggregates up to 4.09" (104mm) of precipitation.
The month with the most snowfall is December, when snow falls for 0.5 days and typically aggregates up to 1.69" (43mm) of snow.
December has the shortest days of the year, with an average of 9h and 54min of daylight.
The month with the least sunshine is December, with an average of 5.4h of sunshine.
Average temperature
Simpsonville, SC
The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (49.6°F).
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (33.6°F).
Average pressure
Simpsonville, 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:
30.01"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:
30.01"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
Simpsonville, SC
- Average wind speed in January:
6.6mph - Average wind speed in February:
6.9mph - Average wind speed in March:
6.8mph - Average wind speed in April:
7mph - Average wind speed in May:
5.7mph - Average wind speed in June:
5mph
- Average wind speed in July:
4.8mph - Average wind speed in August:
4.5mph - Average wind speed in September:
5mph - Average wind speed in October:
5.9mph - Average wind speed in November:
6mph - Average wind speed in December:
6.2mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity
Simpsonville, SC
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (69%).
Average rainfall
Simpsonville, SC
- Average rainfall in January:
3.15" - Average rainfall in February:
2.99" - Average rainfall in March:
2.68" - Average rainfall in April:
3.46" - Average rainfall in May:
3.35" - Average rainfall in June:
2.68"
- Average rainfall in July:
2.72" - Average rainfall in August:
3.39" - Average rainfall in September:
1.65" - Average rainfall in October:
2.36" - Average rainfall in November:
2.99" - Average rainfall in December:
4.09"
The wettest month (with the highest rainfall) is December (4.09").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days
Simpsonville, SC
- Average rainfall days in January:
11.5 days - Average rainfall days in February:
12.1 days - Average rainfall days in March:
14.8 days - Average rainfall days in April:
14.6 days - Average rainfall days in May:
15.8 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
17.9 days - Average rainfall days in September:
12 days - Average rainfall days in October:
9.6 days - Average rainfall days in November:
10.3 days - Average rainfall days in December:
11.7 days
The month with the highest number of rainy days is August (17.9 days).
The month with the least rainy days is October (9.6 days).
Average snowfall
Simpsonville, SC
The month with the highest snowfall is December (1.69").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Simpsonville, SC
- Average snowfall days in January:
1.4 days - Average snowfall days in February:
1.4 days - Average snowfall days in March:
0.3 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:
0.1 days - Average snowfall days in December:
0.5 days
The months with the highest number of snowfall days are January and February (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Simpsonville, SC
- Average daylight in January:
10h and 6min - 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 48min - Average sunshine in March:
7h and 12min - Average sunshine in April:
9h and 0min - Average sunshine in May:
9h and 54min - Average sunshine in June:
10h and 54min
- Average sunshine in July:
11h and 6min - Average sunshine in August:
10h and 24min - Average sunshine in September:
8h and 42min - Average sunshine in October:
6h and 54min - Average sunshine in November:
5h and 54min - Average sunshine in December:
5h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days
Simpsonville, SC
- Average sunshine days in January:
17.4 days - Average sunshine days in February:
13.9 days - Average sunshine days in March:
14.6 days - Average sunshine days in April:
14.1 days - Average sunshine days in May:
12.9 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
10.7 days - Average sunshine days in August:
11.1 days - Average sunshine days in September:
16.1 days - Average sunshine days in October:
20.5 days - Average sunshine days in November:
18.6 days - Average sunshine days in December:
17.6 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (10.7 days).
Average UV index
Simpsonville, SC
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 2).
Average cloud cover
Simpsonville, SC
The months with the most cloud cover are February, March and December (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility
Simpsonville, 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).
