Climate and monthly weather forecastGrafton, WV
Climate and monthly weather forecast
The climate of Grafton
Grafton, West Virginia, belongs to the humid subtropical climate zone according to the Köppen climate classification, which dictates a typical Cfa climate. This involves no distinct dry season, with substantial humidity and precipitation being prominent year-round. Geographically located in the eastern United States, Grafton experiences a significant temperature contrast across the seasons.Analyzing annual weather patterns, it's clear that temperature fluctuations are sizable. January is the coldest month, with the temperature falling to 21.7°F (-5.7°C). However, as we move into July, temperatures peak reaching up to 82°F (27.8°C). This trend is concurrent with relative humidity observations, staying rather steady, fluctuating between 77% to 84%.
Rainfall shows a different pattern, with May witnessing the heaviest rainfall of 4.06" (103mm), while September stands on the opposite end of the spectrum with only 1.89" (48mm). This rainfall is usually spread over a number of days, from 11.9 days in February to 20.8 days in May. Out of the overall precipitation, a considerable amount falls as snow, primarily from December to March, with January recording the highest snowfall of 7.87" (200mm).
Sunshine hours are another important element when considering Grafton's weather. The sun shines the longest in July, offering up to 9.9 hours of sunlight, while December experiences the lowest with only 3.9 hours. Sunshine days follow a similar pattern, reaching a maximum in September with up to 13.7 days.
The best time to visit Grafton
When considering the optimum period for a visit, it is worth noting that the days demonstrate the greatest daylight lengths and elevated temperatures from June to August. Among these, July stands out with 14.6 hours of daylight and a comfortable high temperature averaging 82°F (27.8°C). To complement these conditions, the UV index in July elevates to 6, allowing for sun-soaked outdoor activities, considering proper protection. Additionally, wind speeds are relatively low during this time, providing additional comfort for visitors.The worst time to visit Grafton
On the contrary, January can be stringent for visitors due to the low temperatures reaching down to 21.7°F (-5.7°C) and substantial snowfall of 7.87" (200mm). The daylight hours also dip to their lowest of 9.8 hours, and the sun shines only for about 3.2 hours per day, limiting outdoor activities.Spring weather in Grafton
Spring months from March to May demonstrate a marked increase in temperature, progressing from 32.4°F (0.2°C) to 51.1°F (10.6°C). Daily sunshine hours also increase steadily from 5.7 hours to 8.7 hours. Nevertheless, this period also accompanies an upswing in rainfall, peaking at 4.06" (103mm) in May, spread over 20.8 days.Summer weather in Grafton
Grafton’s summer from June to August is characterized by escalating temperatures that peak at 82°F (27.8°C) in July. Humidity remains consistent around the 77% mark, and rainfall is somewhat reduced compared to spring, ranging from 2.99" (76mm) to 3.07" (78mm). This period also sees the highest volume of sunlight, ranging from 9.6 hours to 9.9 hours daily.Autumn weather in Grafton
During Autumn, from September to November, temperatures start to fall from 54.1°F (12.3°C) to 34.3°F (1.3°C). Sunshine hours also drop gradually from 8.8 hours in September to 5.1 hours in November. Rainfall ranges from the lowest at 1.89" (48mm) in September to 2.2" (56mm) in November, with corresponding rainy days fluctuating between 12 and 14.5 days.Winter weather in Grafton
Winter in Grafton brings substantial cold, with temperatures sinking to as low as 21.7°F (-5.7°C) in January. This season also observes the highest snowfall quantities, reaching 7.87" (200mm) in January. Correspondingly, sunlight is fairly limited, ranging from 3.9 hours per day in December to just 3.2 hours per day in January. Despite these conditions, the relative humidity stays fairly stable, averaging around 82%.Weather in January
January in Grafton, West Virginia typically experiences cold temperatures and a high level of humidity. Indeed, the winter chill is in full swing with the month's low and high temperatures fluctuating between 21.7°F (-5.7°C) and 35.6°F (2°C). Weather in January »Weather in February
February is somewhat warmer than January, while still maintaining the winter's chill. In a slight improvement on the previous month, temperatures begin to lift to a range of 25.5°F (-3.6°C) to 39.7°F (4.3°C). Grafton's wintry conditions persist, however, with continued experiences of snowfall. Weather in February »Weather in March
March signals the transition from winter to spring in Grafton, with temperatures showing a noticeable upswing. The weather warms significantly from February, with temperatures moving from 32.4°F (0.2°C) to 48.9°F (9.4°C). Annual snowfall decreases dramatically as temperatures rise and days continue to lengthen. Weather in March »Weather in April
April sees a definitive shift into spring weather in Grafton, with longer hours of daylight and warming temperatures. It marks a pronounced increase from the cooler March weather, with temperatures climbing from 41.5°F (5.3°C) to 60.8°F (16°C). Weather in April »Weather in May
May brings a considerable increase in temperatures, ushering in the initial signs of the approaching summer. The city sees temperatures rise robustly, ranging from 51.1°F (10.6°C) to 71.6°F (22°C). Grafton's vistas take on a verdant hue as the extended sunshine hours and persistent rain foster prolific plant growth. Weather in May »Weather in June
June marks the onset of summer with its warmer temperatures and more hours of sunshine. Weather conditions transition from mild to warm with temperatures now reaching between 56.7°F (13.7°C) and 78.3°F (25.7°C). Notably, rainfall lowers compared to May, and any vestiges of snowfall are absent at this point of the year. Weather in June »Weather in July
Grafton experiences its warmest month in July, with temperatures peaking to the year's high point. Temperatures in July routinely hit between 60.1°F (15.6°C) and 82°F (27.8°C), the highest range of the year. The sunny weather and limited rainfall make it an ideal time for outdoor pursuits. Weather in July »Weather in August
August continues the trend of high summer temperatures, though slightly less than in July. Despite occasional rains, August's weather is characterized by temperatures hovering from 58.3°F (14.6°C) to 81.5°F (27.5°C). This month proves particularly sunny, making sunscreen a must for residents and tourists. Weather in August »Weather in September
September marks the transition from summer to autumn, with a gradual drop in temperature. Weather in September cools slightly, with temperatures now registering between 54.1°F (12.3°C) and 75.4°F (24.1°C). As the heat subsides, the leaves begin their fall color transformation, offering stunning natural views across Grafton. Weather in September »Weather in October
October is a distinctly cooler month in Grafton, signaling the full range of autumnal weather. The weather becomes significantly crisped compared to September, with temperatures sliding from 44.6°F (7°C) to 62.6°F (17°C). With its vibrant autumn foliage, October provides a picturesque setting for scenic drives or hikes. Weather in October »Weather in November
November is a markedly colder month in Grafton, intimating the imminent arrival of winter. A sharp drop can be noted from October's temperatures, with November's figures falling between 34.3°F (1.3°C) and 50.2°F (10.1°C). While November is a cooler month, the onset of an increased rainfall period makes for a wet and chilly environment. Weather in November »Weather in December
December brings the year to a close with a turn toward colder conditions and shorter days. Weather in December is dominated by a low-high temperature bracket from 29.5°F (-1.4°C) to 41.5°F (5.3°C). The chill of the falling temperatures and increased snowfall signals a returning winter scene. Weather in December »Updated: Jun 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
Grafton's January weather, with an average high temperature of 35.6°F (2°C) and an average low temperature of 21.7°F (-5.7°C), tends to be the coldest of the year.
The months with the highest humidity are January and February, with an average relative humidity of 84%.
In Grafton, West Virginia, during the entire year, the rain falls for 184.5 days and collects up to 35.35" (898mm) of precipitation.
January through May, October through December are months with snowfall.
The month with the most snowfall is January, when snow falls for 16.8 days and typically aggregates up to 7.87" (200mm) of snow.
In Grafton, during the entire year, snow falls for 58.4 days and aggregates up to 31.26" (794mm) of snow.
The month with the least sunshine is January, with an average of 3.2h of sunshine.
January, February, November and December, with an average maximum UV index of 2, are months 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.
The month with the most rainfall is May, when the rain falls for 20.8 days and typically aggregates up to 4.06" (103mm) of precipitation.
In Grafton, West Virginia, snow does not fall in June through September.
With an average of 14h and 54min of daylight, June has the longest days of the year.
July stands out as Grafton's warmest month, with temperatures ranging between an average high of 82°F (27.8°C) and a low of 60.1°F (15.6°C).
The months with the lowest humidity are July and August, with an average relative humidity of 77%.
With an average maximum UV index of 6, July is the month with the highest UV index.
The month with the most sunshine is August, with an average of 10.1h of sunshine.
September is the month with the least rainfall. Rain falls for 14.3 days and accumulates 1.89" (48mm) of precipitation.
With an average of 9h and 30min of daylight, December has the shortest days of the year.
Average temperature
Grafton, WV
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (35.6°F).
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure
Grafton, WV
- Average pressure in January:
30.12"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30"Hg - Average pressure in June:
29.96"Hg
- Average pressure in July:
29.99"Hg - Average pressure in August:
30.01"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed
Grafton, WV
- Average wind speed in January:
7.3mph - Average wind speed in February:
7.2mph - Average wind speed in March:
6.6mph - Average wind speed in April:
6.7mph - Average wind speed in May:
5.7mph - Average wind speed in June:
5.3mph
- Average wind speed in July:
4.6mph - Average wind speed in August:
4.3mph - Average wind speed in September:
4.7mph - Average wind speed in October:
5.4mph - Average wind speed in November:
5.8mph - Average wind speed in December:
6.6mph
The windiest month (with the highest average wind speed) is January (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity
Grafton, WV
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are July and August (77%).
Average rainfall
Grafton, WV
- Average rainfall in January:
2.99" - Average rainfall in February:
3.23" - Average rainfall in March:
3.11" - Average rainfall in April:
3.43" - Average rainfall in May:
4.06" - Average rainfall in June:
3.07"
- Average rainfall in July:
2.99" - Average rainfall in August:
2.32" - Average rainfall in September:
1.89" - Average rainfall in October:
2.87" - Average rainfall in November:
2.2" - Average rainfall in December:
3.19"
The wettest month (with the highest rainfall) is May (4.06").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days
Grafton, WV
- Average rainfall days in January:
12.1 days - Average rainfall days in February:
11.9 days - Average rainfall days in March:
16.5 days - Average rainfall days in April:
17.8 days - Average rainfall days in May:
20.8 days - Average rainfall days in June:
17.4 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
15.7 days - Average rainfall days in September:
14.3 days - Average rainfall days in October:
14.5 days - Average rainfall days in November:
12 days - Average rainfall days in December:
13.7 days
The month with the highest number of rainy days is May (20.8 days).
The month with the least rainy days is February (11.9 days).
Average snowfall
Grafton, WV
- Average snowfall in January:
7.87" - Average snowfall in February:
7.44" - Average snowfall in March:
5.04" - Average snowfall in April:
1.42" - Average snowfall in May:
0.67" - Average snowfall in June:
0"
The month with the highest snowfall is January (7.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Grafton, WV
- Average snowfall days in January:
16.8 days - Average snowfall days in February:
12.6 days - Average snowfall days in March:
8.3 days - Average snowfall days in April:
2.4 days - Average snowfall days in May:
0.3 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:
0.9 days - Average snowfall days in November:
5.6 days - Average snowfall days in December:
11.5 days
The month with the highest number of snowfall days is January (16.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Grafton, WV
- 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 24min - 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:
3h and 12min - Average sunshine in February:
3h and 48min - Average sunshine in March:
5h and 42min - Average sunshine in April:
7h and 48min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
9h and 54min - Average sunshine in August:
10h and 6min - Average sunshine in September:
8h and 48min - Average sunshine in October:
5h and 30min - Average sunshine in November:
5h and 6min - Average sunshine in December:
3h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days
Grafton, WV
- Average sunshine days in January:
6.5 days - Average sunshine days in February:
7.5 days - Average sunshine days in March:
8.5 days - Average sunshine days in April:
9.6 days - Average sunshine days in May:
8.8 days - Average sunshine days in June:
10.5 days
- Average sunshine days in July:
10.7 days - Average sunshine days in August:
13 days - Average sunshine days in September:
13.5 days - Average sunshine days in October:
13.7 days - Average sunshine days in November:
13.6 days - Average sunshine days in December:
9.1 days
The month with the most sunshine days is October (13.7 days).
The month with the least sunshine days is January (6.5 days).
Average UV index
Grafton, WV
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Grafton, WV
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility
Grafton, WV
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).
