Climate and monthly weather forecastSullivan, KY
Climate and monthly weather forecast
Weather in January
January, like December, in Sullivan, Kentucky, is a wintry winter month, with an average temperature ranging between max 40.1°F (4.5°C) and min 27.5°F (-2.5°C). With average temperatures fluctuating between a high of 40.1°F (4.5°C) and a low of 27.5°F (-2.5°C), January stands out as the coldest month. Weather in January »Weather in February
The last month of the winter, February, is a chilly month in Sullivan, Kentucky, with an average temperature ranging between min 31.1°F (-0.5°C) and max 45.1°F (7.3°C). Sullivan records an average high-temperature of a chilly 45.1°F (7.3°C) in February, maintaining a close correlation with January's 40.1°F (4.5°C). Weather in February »Weather in March
The first month of the spring, March, is a refreshing month in Sullivan, Kentucky, with an average temperature varying between 39.9°F (4.4°C) and 55.6°F (13.1°C). Sullivan's weather in March presents a rise in the average high-temperature, moving from a chilly 45.1°F (7.3°C) in February to a moderate 55.6°F (13.1°C). Weather in March »Weather in April
April in Sullivan, Kentucky, is a refreshing spring month, with temperature in the range of an average low of 48.9°F (9.4°C) and an average high of 66.6°F (19.2°C). April brings a temperature change, with average high-temperatures moving from March's refreshing 55.6°F (13.1°C) to a comfortable 66.6°F (19.2°C). Weather in April »Weather in May
May, the last month of the spring in Sullivan, is a moderately hot month, with an average temperature varying between 58.3°F (14.6°C) and 75.2°F (24°C). May witnesses a subtle temperature ascent, adjusting from a refreshing 66.6°F (19.2°C) in April to a warm 75.2°F (24°C). Weather in May »Weather in June
June, the first month of the summer in Sullivan, is still a warm month, with an average temperature fluctuating between 65.8°F (18.8°C) and 83.7°F (28.7°C). A slight uplift in the average high-temperature marks June, adjusting from May's moderately hot 75.2°F (24°C) to a still warm 83.7°F (28.7°C). Weather in June »Weather in July
July is a tropical summer month in Sullivan, Kentucky, with an average temperature ranging between max 86.2°F (30.1°C) and min 68.4°F (20.2°C). Sullivan's July weather, with an average high temperature of 86.2°F (30.1°C) and an average low temperature of 68.4°F (20.2°C), tends to be the warmest of the year. The heat index value during July is calculated to be a fiery hot 100.4°F (38°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Sullivan, Kentucky, with an average temperature fluctuating between 84.9°F (29.4°C) and 66.2°F (19°C). August reports an average high-temperature of a moderately hot 84.9°F (29.4°C), slightly varied from July's 86.2°F (30.1°C). Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Sullivan, Kentucky, with temperature in the range of an average high of 80.1°F (26.7°C) and an average low of 60.8°F (16°C). September's onset records an average high-temperature of a still warm 80.1°F (26.7°C), a near match to August's 84.9°F (29.4°C). Weather in September »Weather in October
October, like September, in Sullivan, Kentucky, is another enjoyable autumn month, with an average temperature varying between 50.2°F (10.1°C) and 67.8°F (19.9°C). October comes with a decrease in the average high-temperature, falling from a warm 80.1°F (26.7°C) in September to a comfortable 67.8°F (19.9°C). Weather in October »Weather in November
The last month of the autumn, November, is also a fresh month in Sullivan, Kentucky, with an average temperature ranging between max 54.5°F (12.5°C) and min 39.7°F (4.3°C). The onset of November results in a decrease in the average high-temperature, receding from a refreshing 67.8°F (19.9°C) in October to a cool 54.5°F (12.5°C). Weather in November »Weather in December
The first month of the winter, December, is also a frosty month in Sullivan, Kentucky, with an average temperature fluctuating between 33.3°F (0.7°C) and 45.1°F (7.3°C). A subtle decrease in the average high-temperature marks December, falling from November's fresh 54.5°F (12.5°C) to a chilly 45.1°F (7.3°C). Weather in December »Updated: Feb 12, 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
January, with its average high-temperature of 40.1°F (4.5°C) and an average low-temperature of 27.5°F (-2.5°C), holds the record as the coldest month.
In Sullivan, during the entire year, the rain falls for 136.4 days and collects up to 20" (508mm) of precipitation.
January through April, November and December are months with snowfall in Sullivan.
January is the month with the most snowfall. Snow falls for 4.4 days and accumulates 0.79" (20mm) of snow.
Throughout the year, in Sullivan, there are 15.2 snowfall days, and 3.03" (77mm) of snow is accumulated.
With an average of 4.5h of sunshine, January has the least sunshine of the year.
The months with the lowest UV index in Sullivan are January, February and December, with an average maximum UV index of 2.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
The month with the most rainfall in Sullivan, Kentucky, is April, when the rain falls for 13 days and typically aggregates up to 2.2" (56mm) of precipitation.
The most humid month in Sullivan is May, with an average relative humidity of 80%.
May through October are months without snowfall in Sullivan, Kentucky.
May through August, with an average maximum UV index of 6, are months with the highest UV index in Sullivan, Kentucky.
June has the longest days of the year, with an average of 14h and 42min of daylight.
With an average of 10.5h of sunshine, June has the most sunshine of the year.
In Sullivan, Kentucky, temperatures reach their average annual highs in July, measuring 86.2°F (30.1°C) and a minimum average of 68.4°F (20.2°C).
September is the month with the least rainfall in Sullivan. Rain falls for 9.8 days and accumulates 0.91" (23mm) of precipitation.
With an average relative humidity of 71%, October is the least humid month in Sullivan, Kentucky.
December has the shortest days of the year, with an average of 9h and 36min of daylight.
Average temperature
Sullivan, KY
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (40.1°F).
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).
Average pressure
Sullivan, KY
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.95"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.99"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 January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed
Sullivan, KY
- Average wind speed in January:
9.7mph - Average wind speed in February:
9.9mph - Average wind speed in March:
9.8mph - Average wind speed in April:
9.8mph - Average wind speed in May:
8.1mph - Average wind speed in June:
6.7mph
- Average wind speed in July:
5.8mph - Average wind speed in August:
5.9mph - Average wind speed in September:
6.6mph - Average wind speed in October:
8.3mph - Average wind speed in November:
8.8mph - Average wind speed in December:
9.1mph
The windiest month (with the highest average wind speed) is February (9.9mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity
Sullivan, KY
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Sullivan, KY
- Average rainfall in January:
1.46" - Average rainfall in February:
1.89" - Average rainfall in March:
1.81" - Average rainfall in April:
2.2" - Average rainfall in May:
1.93" - Average rainfall in June:
1.93"
- Average rainfall in July:
1.73" - Average rainfall in August:
1.54" - Average rainfall in September:
0.91" - Average rainfall in October:
1.54" - Average rainfall in November:
1.5" - Average rainfall in December:
1.57"
The wettest month (with the highest rainfall) is April (2.2").
The driest month (with the least rainfall) is September (0.91").
Average rainfall days
Sullivan, KY
- Average rainfall days in January:
8.2 days - Average rainfall days in February:
9.7 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
13 days - Average rainfall days in May:
14.7 days - Average rainfall days in June:
13.7 days
- Average rainfall days in July:
14.8 days - Average rainfall days in August:
12.7 days - Average rainfall days in September:
9.8 days - Average rainfall days in October:
9.2 days - Average rainfall days in November:
8.8 days - Average rainfall days in December:
9.5 days
The month with the highest number of rainy days is July (14.8 days).
The month with the least rainy days is January (8.2 days).
Average snowfall
Sullivan, KY
The month with the highest snowfall is January (0.79").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Sullivan, KY
- Average snowfall days in January:
4.4 days - Average snowfall days in February:
4 days - Average snowfall days in March:
1.9 days - Average snowfall days in April:
0.3 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:
0.1 days - Average snowfall days in November:
1 days - Average snowfall days in December:
3.5 days
The month with the highest number of snowfall days is January (4.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Sullivan, KY
- Average daylight in January:
9h and 54min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 12min - Average daylight in June:
14h and 42min
- Average daylight in July:
14h and 30min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 12min - Average daylight in December:
9h and 36min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
4h and 30min - Average sunshine in February:
4h and 36min - Average sunshine in March:
6h and 12min - Average sunshine in April:
8h and 36min - Average sunshine in May:
9h and 12min - Average sunshine in June:
10h and 30min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
10h and 18min - Average sunshine in September:
9h and 6min - Average sunshine in October:
6h and 54min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 42min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days
Sullivan, KY
- Average sunshine days in January:
18.1 days - Average sunshine days in February:
14.5 days - Average sunshine days in March:
15.2 days - Average sunshine days in April:
14.9 days - Average sunshine days in May:
13.2 days - Average sunshine days in June:
13.6 days
- Average sunshine days in July:
13.1 days - Average sunshine days in August:
16.2 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
20.7 days - Average sunshine days in November:
19.7 days - Average sunshine days in December:
17.8 days
The month with the most sunshine days is October (20.7 days).
The month with the least sunshine days is July (13.1 days).
Average UV index
Sullivan, KY
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover
Sullivan, KY
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility
Sullivan, KY
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).
