Climate and monthly weather forecast
Simpsonville, SC

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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 cool month in Simpsonville, South Carolina, with an average temperature varying between 54.1°F (12.3°C) and 37°F (2.8°C). The advent of February sees the average high-temperature at a fresh 54.1°F (12.3°C), subtly shifted 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 ranging between min 43.2°F (6.2°C) and max 61.2°F (16.2°C). Simpsonville's March weather indicates a minor increase in high-temperatures, edging from February's cool 54.1°F (12.3°C) to a comfortable 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 »
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Frequently asked questions

What is the coldest month in Simpsonville?

January is the month when Simpsonville, South Carolina, experiences its coldest temperatures, averaging a high of 49.6°F (9.8°C) and a low of 33.6°F (0.9°C).

How many days does it rain in Simpsonville?

Throughout the year, in Simpsonville, South Carolina, there are 163.9 rainfall days, and 35.51" (902mm) of precipitation is accumulated.

When does it snow in Simpsonville?

Months with snowfall in Simpsonville, South Carolina, are January through March, November and December.

How much does it snow in Simpsonville?

In Simpsonville, during the entire year, snow falls for 3.7 days and aggregates up to 4.17" (106mm) of snow.

When is the lowest UV index in Simpsonville?

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

When is Daylight Saving Time (DST) in Simpsonville?

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 Simpsonville?

April through October are months without snowfall in Simpsonville, South Carolina.

What is the month with the highest UV index in Simpsonville?

The months with the highest UV index are May through August, with an average maximum UV index of 6.

When are the longest days in Simpsonville?

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

What is the warmest month in Simpsonville?

In Simpsonville, July is the month with the highest recorded average temperatures, measuring a high of 90.5°F (32.5°C) and a low of 69.1°F (20.6°C).

What is the least humid month in Simpsonville?

July is the least humid month, with an average relative humidity of 69%.

What month has the most sunshine in Simpsonville?

July has the most sunshine of the year, with an average of 11.1h of sunshine.

What is the driest month in Simpsonville?

September is the month with the least rainfall in Simpsonville. Rain falls for 12 days and accumulates 1.65" (42mm) of precipitation.

What is the most humid month in Simpsonville?

December is the most humid month in Simpsonville, South Carolina, with an average relative humidity of 77%.

What is the rainiest month in Simpsonville?

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.

When does it snow the most in Simpsonville?

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.

What is the month with the shortest days in Simpsonville?

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

What is the month with the least sunshine in Simpsonville?

The month with the least sunshine in Simpsonville, South Carolina, is December, with an average of 5.4h of sunshine.

Average temperature
Simpsonville, SC

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).

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Average pressure
Simpsonville, SC

Average pressure - Simpsonville, 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).

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Average wind speed
Simpsonville, SC

Average wind speed - Simpsonville, SC

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).

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Average rainfall
Simpsonville, SC

Average rainfall - Simpsonville, SC

The wettest month (with the highest rainfall) is December (4.09").
The driest month (with the least rainfall) is September (1.65").

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Average rainfall days
Simpsonville, SC

Average rainfall days - Simpsonville, SC

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).

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Average snowfall
Simpsonville, SC

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").

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Average snowfall days
Simpsonville, SC

Average snowfall days - Simpsonville, SC

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).

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Average daylight / Average sunshine
Simpsonville, SC

Average daylight / Average sunshine - Simpsonville, 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: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).

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Average sunshine days
Simpsonville, SC

Average sunshine days - Simpsonville, SC

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (10.7 days).

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Average visibility
Simpsonville, SC

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).

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Simpsonville, South Carolina, USA

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