Climate and monthly weather forecastWilliamstown, WV
Climate and monthly weather forecast
The climate of Williamstown
Williamstown, West Virginia, USA lies within the Cfa climate zone as conveyed by the Köppen climate system. This zone is categorized as Humid subtropical, notable for its significant rainfall throughout the year and absence of dry seasons. Weather conditions in Williamstown vary considerably year-round, with changes observable in humidity, rainfall, sunshine hours, and temperature.The highest temperatures occur in the midst of summer, with the heat reaching peaks averaging 85.6°F (29.8°C) in July. During the winter, temperatures are significantly lower, plummeting to around 22.8°F (-5.1°C) in the coldest month of January. Rainfall levels fluctuate from month to month, albeit with no distinct dry season. The highest volume of rain is recorded in May, yielding up to 3.19" (81mm). In terms of snowfall, the greater part of the year is snow-free; however, the colder months of January, February, and December do experience the occasional flurry, reaching up to 2.8" (71mm) in February.
Throughout the year, the proportion of cloud coverage varies mostly from 34% to 64%, with higher amounts during the winter months and lowest in August. Undeniably, it is notable that Williamstown stays generally humid, with relative humidity ranging between76% and 83% annually. Wind speeds are relatively consistent around the year, ranging from a light breeze of 4.2mph (6.8km/h) in August to a gentle 6.8mph (10.9km/h) in February.
The best time to visit Williamstown
Planning an enjoyable visit to Williamstown largely hinges on the visitor's preference for warmer or cooler temperatures. If summer festivities and outdoor activities top the list, the months of May to July provide ideal conditions. During this period, maximum temperatures range from 74.1°F (23.4°C) to 85.6°F (29.8°C), paired with relatively high sunshine hours - up to 9.7 hours in July. Highlighting the month of May, rainfall peaks at 3.19" (81mm), inviting tourists with an affinity for crisp, post-rain landscapes.The worst time to visit Williamstown
For those who dread chilly temperatures, Williamstown's winter months from December to February might be less favorable. The temperature plunges to averages between 22.8°F (-5.1°C) to 41.7°F (5.4°C), along with a substantial increase in cloud coverage. With a maximum of 2.17 to 2.8" (71mm) of snowfall and fewer daylight hours, these months present a colder, more somber atmosphere.Spring weather in Williamstown
Spring brings forth a noticeable shift in Williamstown's weather as the town shakes off the winter cold. From March to May, average daily temperatures slowly climb from 51.1°F (10.6°C) to 74.1°F (23.4°C). As temperatures gradually rise, rain begins to fall more heavily, leading to 2.2" (56mm) in March, 2.52" (64mm) in April, and a peak of 3.19" (81mm) in May. However, daylight hours positively increase, reaching 14.4 hours per day by the end of spring.Summer weather in Williamstown
From June to August, Williamstown enjoys its warmest conditions of the year. Average daily temperatures stand within the range from 81.1°F (27.3°C) to 85.6°F (29.8°C), allowing for satisfying sun-soaked activities. While rainfall persists, it remains lower than in spring, with volumes decreasing from 2.13" (54mm) in June to a more modest 1.73" (44mm) in August. The summer also sees the annual high in sunshine hours, with a pleasing average of 10.1 hours in August.Autumn weather in Williamstown
Autumn in Williamstown exhibits a gradual cooling trend from September through November. Average temperatures range from 77.9°F (25.5°C) in September to 51.1°F (10.6°C) in November. Rainfall and humidity decline slightly, with minimum rainfall of 1.46" (37mm) in September. Even though temperatures cool, autumn still boasts respectable daylight hours, extending from 12.4 hours in September to 10 hours by late November.Winter weather in Williamstown
The season of winter in Williamstown, stretching from December to February, is characterized largely by cooler temperatures and increased cloud coverage. Average temperatures plummet substantially from 41.7°F (5.4°C) in December to the annual low of 22.8°F (-5.1°C) in January. Snowfall during these months can reach up to 2.8" (71mm) in February, although this remains relatively light. Despite less daylight and more cloud, winter does present a beautiful and quiet landscape, particularly for those who appreciate a tranquil snow-covered ambience.Weather in January
In January, the cold weather of Williamstown, West Virginia, is firmly entrenched. The temperatures hover between 22.8°F (-5.1°C) and 36.1°F (2.3°C) and chances of snowfall are amplified with an average of 2.17" (55mm) of snow being recorded. Weather in January »Weather in February
Slightly warmer, with temperatures ranging from 26.1°F (-3.3°C) to 40.6°F (4.8°C), February welcomes a shift from the harsh cold of January. On average, 2.8" (71mm) of snow are accumulated, indicating that the winter grip persists in Williamstown, West Virginia. Weather in February »Weather in March
Welcome to March, as the gears of weather gradually shift towards spring. The average temperature swings from 34.2°F (1.2°C) to 51.1°F (10.6°C), providing relief from the cold conditions of February. Although snowfall decreases to an average of 2.2" (56mm), high rainfall of 2.2" (56mm) demands the need for umbrellas in Williamstown, West Virginia. Weather in March »Weather in April
April announces spring’s arrival with temperatures flitting from 43.5°F (6.4°C) to 63.3°F (17.4°C). As 0.24" (6mm) of snow is recorded, the wintry conditions of March become a distant memory in Williamstown, West Virginia. This month, blooming nature coexists with a higher amount of rainfall, crafting a freshened appearance. Weather in April »Weather in May
In May, temperatures escalate in Williamstown, West Virginia, as they fluctuate from 53.2°F (11.8°C) to 74.1°F (23.4°C). This period remains devoid of snowfall, contrasting starkly with the 3.19" (81mm) of rainfall, the highest in the year. Weather in May »Weather in June
June brings the warmth of summer to Williamstown, West Virginia, with temperature variations from 59.7°F (15.4°C) to 81.1°F (27.3°C). In this month, sunshine is more prominent, averaging 9.6 hours a day, providing extended daylight enjoyment. Weather in June »Weather in July
Hang tight for the heat wave, as July presents the highest temperatures of the year, soaring from 63.1°F (17.3°C) to 85.6°F (29.8°C) in Williamstown, West Virginia. Despite the high temperature, no cessation of rainfall is observed, with an average 2.48" (63mm). Weather in July »Weather in August
Still enmeshed in summer fever, temperatures in August range from 61.3°F (16.3°C) to 84.2°F (29°C) in Williamstown, West Virginia. With an impressive average sunshine duration of 10.1 hours daily, summer activities remain vibrant. Weather in August »Weather in September
September ushers in a noticeable cooling trend as temperatures oscillate from 56.7°F (13.7°C) to 77.9°F (25.5°C), signaling the onset of fall in Williamstown, West Virginia. Contrary to the falling temperatures, the rainfall experiences a slight dip to 1.46" (37mm). Weather in September »Weather in October
The cool fall season settles in with October temperatures swinging between 46°F (7.8°C) and 64.4°F (18°C). By this time the summer's heat has long since vanished, and the crisp autumn air dominates. The season's beauty is complemented by lower levels of humidity despite the presence of significant rainfall. Weather in October »Weather in November
The last month of the autumn, November, is also a fresh month in Williamstown, West Virginia, with an average temperature fluctuating between 35.6°F (2°C) and 51.1°F (10.6°C). Williamstown in November experiences a subtle temperature decline, with average high-temperatures reducing from a comfortable 64.4°F (18°C) in October to a fresh 51.1°F (10.6°C). Weather in November »Weather in December
December witnesses a significant drop in temperatures, tumbling to the frigid range of 30.4°F (-0.9°C) to 41.7°F (5.4°C). Snowfall makes a comeback with an average accumulation of 1.46" (37mm). The decrease in daylight hours to 9.4, the shortest in the year, indicates the arrival of winter. Weather in December »Updated: Feb 14, 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 Williamstown, the lowest temperatures are generally noted in January, averaging a high of 36.1°F (2.3°C) and a low of 22.8°F (-5.1°C).
January and February, with an average relative humidity of 83%, are most humid months.
In Williamstown, during the entire year, the rain falls for 156.1 days and collects up to 24.8" (630mm) of precipitation.
Months with snowfall in Williamstown, West Virginia, are January through April, October through December.
In Williamstown, West Virginia, during the entire year, snow falls for 31.3 days and aggregates up to 9.37" (238mm) of snow.
With an average of 3.4h of sunshine, January has the least sunshine of the year in Williamstown.
The months with the lowest UV index in Williamstown, West Virginia, are January, February, November and December, with an average maximum UV index of 2.
The month with the most snowfall is February, when snow falls for 8.6 days and typically aggregates up to 2.8" (71mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Williamstown, West Virginia, 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 in Williamstown is May, when the rain falls for 18.3 days and typically aggregates up to 3.19" (81mm) of precipitation.
May through September are months without snowfall in Williamstown.
The months with the lowest humidity are June through August, with an average relative humidity of 76%.
The month with the longest days is June, with an average of 14h and 54min of daylight.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
The temperatures in Williamstown, West Virginia, reach their highest averages in July, with highs of 85.6°F (29.8°C) and lows of 63.1°F (17.3°C).
August has the most sunshine of the year in Williamstown, with an average of 10.1h of sunshine.
The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 1.46" (37mm) of precipitation.
With an average of 9h and 24min of daylight, December has the shortest days of the year.
Average temperature
Williamstown, WV
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (36.1°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).
Average pressure
Williamstown, WV
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.09"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"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.15"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed
Williamstown, WV
- Average wind speed in January:
6.7mph - Average wind speed in February:
6.8mph - Average wind speed in March:
6.5mph - Average wind speed in April:
6.6mph - Average wind speed in May:
5.5mph - Average wind speed in June:
5mph
- Average wind speed in July:
4.3mph - Average wind speed in August:
4.2mph - 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:
6.2mph
The windiest month (with the highest average wind speed) is February (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity
Williamstown, WV
The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are June, July and August (76%).
Average rainfall
Williamstown, WV
- Average rainfall in January:
1.61" - Average rainfall in February:
2.13" - Average rainfall in March:
2.2" - Average rainfall in April:
2.52" - Average rainfall in May:
3.19" - Average rainfall in June:
2.13"
- Average rainfall in July:
2.48" - Average rainfall in August:
1.73" - Average rainfall in September:
1.46" - Average rainfall in October:
1.57" - Average rainfall in November:
1.54" - Average rainfall in December:
2.24"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days
Williamstown, WV
- Average rainfall days in January:
9.1 days - Average rainfall days in February:
9 days - Average rainfall days in March:
13.8 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
16.3 days
- Average rainfall days in July:
16.8 days - Average rainfall days in August:
14 days - Average rainfall days in September:
12.5 days - Average rainfall days in October:
10.8 days - Average rainfall days in November:
8.4 days - Average rainfall days in December:
11.3 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is November (8.4 days).
Average snowfall
Williamstown, WV
The month with the highest snowfall is February (2.8").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Williamstown, WV
- Average snowfall days in January:
9.5 days - Average snowfall days in February:
8.6 days - Average snowfall days in March:
5.2 days - Average snowfall days in April:
1 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:
1.5 days - Average snowfall days in December:
5.4 days
The month with the highest number of snowfall days is January (9.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Williamstown, 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 24min
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 24min).
- Average sunshine in January:
3h and 24min - Average sunshine in February:
4h and 12min - Average sunshine in March:
5h and 48min - Average sunshine in April:
7h and 42min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
9h and 42min - Average sunshine in August:
10h and 6min - Average sunshine in September:
8h and 18min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 30min - Average sunshine in December:
3h and 48min
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 24min).
Average sunshine days
Williamstown, WV
- Average sunshine days in January:
14.7 days - Average sunshine days in February:
12.5 days - Average sunshine days in March:
13.5 days - Average sunshine days in April:
11.9 days - Average sunshine days in May:
9.8 days - Average sunshine days in June:
11.6 days
- Average sunshine days in July:
11.7 days - Average sunshine days in August:
14.3 days - Average sunshine days in September:
15.2 days - Average sunshine days in October:
18.4 days - Average sunshine days in November:
19.9 days - Average sunshine days in December:
15.8 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (9.8 days).
Average UV index
Williamstown, WV
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Williamstown, WV
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility
Williamstown, WV
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
