Climate and monthly weather forecastClayton, DE
Climate and monthly weather forecast
The climate of Clayton
Characterized by the predominating Köppen classification, Clayton, Delaware, sits in the humid subtropical climate zone, carrying a "Cfa" designation. This classification denotes a region where conditions are typically humid, with no real dry season.In the span of a year, Clayton witnesses a range of temperatures. Highs swing between 39.2°F (4°C) in January and 84.4°F (29.1°C) in July, the warmest month. Meanwhile, lows fluctuate from 27.9°F (-2.3°C) to 69.3°F (20.7°C) in January and July, respectively. Humidity levels stay relatively constant throughout the year, averaging between 73% and 79%, contributing to the area's overall humidity.
Rainfall is seen more or less throughout the year, with the driest period in January, yielding approximately 2.13" (54mm) and May being the wettest with around 3.86" (98mm) of rain. There is a slight shift in the frequency of rainfall days - from 9.7 days in January to a peak of 19 days in July. Snow is a rare occurrence with minimal dustings in January, March, and December.
The overall atmosphere appears hardy - the pressure swings marginally from 29.94" (760mm) in June to 30.12" (765mm) in November. Simultaneously, average wind speeds play between 6.1mph (9.8km/h) and 9.5mph (15.3km/h). Gusts can, however, amp up to reach speeds of 15.5mph (24.9km/h) during February.
The best time to visit Clayton
The most agreeable time to venture to Clayton, Delaware hinges upon one's preferences for weather. However, the months from May to September generally provide the most amenable conditions for outdoor activities. The average high temperatures oscillate between 71.2°F (21.8°C) to 84.4°F (29.1°C) during this period making it the warmest time of the year. Moreover, the longest days are also during this time with daylight hours varying from 14.3 to 14.9 - perfect for sightseeing and exploration.The worst time to visit Clayton
January and February, with their coldest average temperatures, peaking at 39.2°F (4°C) and 43°F (6.1°C) respectively, may not serve as the most inviting time to visit Clayton for those unaccustomed to a chillier climate. The highest probability of snowfall, accompanied by the shortest days and longest nights further exacerbates the discomfort, making these months perhaps the least attractive to potential travelers.Spring weather in Clayton
Surfacing from the cold of winter, spring weather in Clayton sees the temperatures steadily climb from 36.7°F (2.6°C) in March to a much warmer 62.2°F (16.8°C) in April, and up to 71.2°F (21.8°C) in May. The relative humidity maintains about the 74% to 79% range during this period - signaling a wetter climate. The rainfall also follows an upward trend, accumulating from 2.91" (74mm) in March to 3.07" (78mm) in May.Summer weather in Clayton
June paves the way for summer, marked by a substantial increase in temperature - featuring daily highs reaching up to 84.4°F (29.1°C) in July. Nights are also warmer, registering an average low of 69.3°F (20.7°C) in the same month. Rainfall is also frequent, and the parched land drinks in approximately 3.19" (81mm) to 3.86" (98mm) across these three months, with July being the wettest in the year.Autumn weather in Clayton
As the summer heat recedes, autumn brings a more mellow climate. Temperatures gradually descend during this period, sliding from a high of 76.6°F (24.8°C) in September, down to 54°F (12.2°C) in November. The rainfall follows a similar path, tapering off from 2.32" (59mm) in September to 2.28" (58mm) by November, making it one of the relatively drier times of the year.Winter weather in Clayton
Winter signals a rapid descent in temperature, falling down to a low of 27.9°F (-2.3°C) in January - the coldest month of the year in Clayton. December experiences a slight chance of snow with about 0.91" (23mm) accumulating. While the month of January sees the shortest daylight hours, bracing wind chills might make thermometers feel several degrees colder than actual readings.Weather in January
The onset of the year in Clayton, Delaware brings with it a sense of chill, with the lowest average temperature sitting at 27.9°F (-2.3°C). Compared to the conditions that herald December, January sees a notable increase in its relative humidity. Weather in January »Weather in February
February sees a slight uptick in temperature from January, both the highs and lows experiencing an increase. Relatively more sunshine graces Clayton, Delaware alongside a marginal rise in rainfall to 2.64" (67mm). The winter chill remains ever-present, albeit slowly retreating. Weather in February »Weather in March
The introduction of spring in Clayton, Delaware commences with rising temperature averages. The arrival of March brings a significant increase in daylight hours compared to February, resulting in brighter days. Rainfall sees a slight increase, while, interestingly, the snowfall peaks at 2.6" (66mm). Weather in March »Weather in April
April witnesses a welcome shift towards increased warmth, with temperatures progressing steadily from the colder climes of March. Accompanying the rise in mercury are longer daylight hours, enhancing visibility throughout Clayton, Delaware. Weather in April »Weather in May
May carries forward the trend of rising temperatures following the advent of spring in Clayton, Delaware. The mercury continues its climb from April, indicating a stronger presence of the sun. May showcases an increased relative humidity of 79%, marking it distinctively damper compared to the previous months. Weather in May »Weather in June
The advent of summer in June ushers in a marked increase in temperatures, promising balmy days in Clayton, Delaware. June compares favorably to May, with more daylight hours and dominant sunshine, signaling longer, sun-drenched days. Weather in June »Weather in July
July recognized as the pinnacle of summer, sees the highest temperatures, peaking at 84.4°F (29.1°C), and the lowest winds speeds of just 6.1mph (9.8km/h). This underlines the truly calmer nature of the weather in Clayton, Delaware during this month. Weather in July »Weather in August
August continues the trend of high temperatures from July, albeit with a slight dip, signaling the gradual yet impending arrival of fall in Clayton, Delaware. This month sees the second-highest rainfall, a notable variation from the warmer climate. Weather in August »Weather in September
September marks the advent of fall in Clayton, Delaware, with a noticeable decrease in temperatures compared to August. With 9.4 hours of sunshine, it hosts a balanced climate with mild days and cooler nights. Lower temperatures are paired with less rainfall of only 2.32" (59mm), marking a transition towards the drier autumn period. Weather in September »Weather in October
October embodies the essence of fall weather in Clayton, Delaware, with a continued dip in temperatures from September. The arrival of chilly winds is accompanied by a decreasing daylight duration, a part-and-parcel of fall's identity. Weather in October »Weather in November
November weather in Clayton, Delaware is indicative of approaching winter with a drastic dip in temperature from the previous month. Reduced daylight hours and the first traces of snowfall at 0.28" (7mm) distinguishes it from October. Weather in November »Weather in December
December, bound by winter’s grasp, sees a further drop in temperatures, with lower boundaries reaching 34.7°F (1.5°C) in Clayton, Delaware. Milder snowfall enriches the land, painting a snowy end-of-the-year landscape. While lower temperatures persist, a significant increase in rainfall to 3.43" (87mm) is observed compared to November. Weather in December »Updated: Aug 22, 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 is the coldest month of the year, registering average temperatures as high as 39.2°F (4°C) and as low as 27.9°F (-2.3°C).
The month with the least rainfall is January, when the rain falls for 9.7 days and typically collects 2.13" (54mm) of precipitation.
Throughout the year, there are 169.2 rainfall days, and 34.96" (888mm) of precipitation is accumulated.
Months with snowfall are January through April, November and December.
Throughout the year, there are 14.4 snowfall days, and 7.44" (189mm) of snow is accumulated.
The months with the lowest UV index are January and December, with an average maximum UV index of 2.
February has the least sunshine of the year, with an average of 5.1h of sunshine.
The month with the most snowfall is March, when snow falls for 2.8 days and typically aggregates up to 2.6" (66mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Clayton, 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.
With an average relative humidity of 73%, April is the least humid month.
May is the most humid month, with an average relative humidity of 79%.
May through October are months without snowfall.
The months with the highest UV index are May through August, with an average maximum UV index of 6.
The month with the longest days is June, with an average of 14h and 54min of daylight.
July temperatures tend to peak at an average high of 84.4°F (29.1°C) and dip to a low of 69.3°F (20.7°C).
July has the most sunshine of the year, with an average of 10.7h of sunshine.
August is the month with the most rainfall in Clayton. Rain falls for 16.4 days and accumulates 3.86" (98mm) of precipitation.
With an average of 9h and 30min of daylight, December has the shortest days of the year.
Average temperature
Clayton, DE
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (39.2°F).
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (27.9°F).
Average pressure
Clayton, DE
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
30.02"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Clayton, DE
- Average wind speed in January:
9.4mph - Average wind speed in February:
9.5mph - Average wind speed in March:
9.5mph - Average wind speed in April:
9.4mph - Average wind speed in May:
7.6mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
6.1mph - Average wind speed in August:
6mph - Average wind speed in September:
6.7mph - Average wind speed in October:
8.1mph - Average wind speed in November:
8.5mph - Average wind speed in December:
8.7mph
The windiest months (with the highest average wind speed) are February and March (9.5mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity
Clayton, DE
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall
Clayton, DE
- Average rainfall in January:
2.13" - Average rainfall in February:
2.64" - Average rainfall in March:
2.91" - Average rainfall in April:
2.64" - Average rainfall in May:
3.07" - Average rainfall in June:
3.19"
- Average rainfall in July:
3.62" - Average rainfall in August:
3.86" - Average rainfall in September:
2.32" - Average rainfall in October:
2.87" - Average rainfall in November:
2.28" - Average rainfall in December:
3.43"
The wettest month (with the highest rainfall) is August (3.86").
The driest month (with the least rainfall) is January (2.13").
Average rainfall days
Clayton, DE
- Average rainfall days in January:
9.7 days - Average rainfall days in February:
10.3 days - Average rainfall days in March:
15.1 days - Average rainfall days in April:
15.3 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
17.4 days
- Average rainfall days in July:
19 days - Average rainfall days in August:
16.4 days - Average rainfall days in September:
14.3 days - Average rainfall days in October:
12.6 days - Average rainfall days in November:
9.3 days - Average rainfall days in December:
11.5 days
The month with the highest number of rainy days is July (19 days).
The month with the least rainy days is November (9.3 days).
Average snowfall
Clayton, DE
The month with the highest snowfall is March (2.6").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Clayton, DE
- Average snowfall days in January:
4.5 days - Average snowfall days in February:
4.1 days - Average snowfall days in March:
2.8 days - Average snowfall days in April:
0.2 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:
0.3 days - Average snowfall days in December:
2.5 days
The month with the highest number of snowfall days is January (4.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Clayton, DE
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 54min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 30min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
5h and 18min - Average sunshine in February:
5h and 6min - Average sunshine in March:
6h and 42min - Average sunshine in April:
8h and 48min - Average sunshine in May:
8h and 54min - Average sunshine in June:
10h and 18min
- Average sunshine in July:
10h and 42min - Average sunshine in August:
10h and 30min - Average sunshine in September:
9h and 24min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 54min - Average sunshine in December:
5h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days
Clayton, DE
- Average sunshine days in January:
17.2 days - Average sunshine days in February:
13.6 days - Average sunshine days in March:
13.4 days - Average sunshine days in April:
12.6 days - Average sunshine days in May:
10.3 days - Average sunshine days in June:
10.6 days
- Average sunshine days in July:
9.5 days - Average sunshine days in August:
11.3 days - Average sunshine days in September:
13.4 days - Average sunshine days in October:
16.3 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
16.8 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (9.5 days).
Average UV index
Clayton, DE
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 and December (UV index 2).
Average cloud cover
Clayton, DE
The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility
Clayton, DE
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).
