Climate and monthly weather forecastWilliston, VT
Climate and monthly weather forecast
The climate of Williston
Williston, located in the state of Vermont, USA, experiences a humid continental climate as indicated by the Köppen climate classification (Dfb) which signifies a reasonably warm summer season but no dry season at all. Throughout the year, the weather conditions tend to fluctuate with significant variations observed in several parameters.Taking a closer look at the monthly average climatological data, temperatures range from 12°F (-11.1°C) to 78.4°F (25.8°C). This wide range presents a clear distinction between the cold winter months and the warm summer months. In terms of precipitation, Williston also experiences a fair number of rainy days, with the month of June receiving the most rainfall at 3.19" (81mm).
At the same time, humidity levels remain high throughout the year with an above 75% relative humidity observed in each month. Snowfall also presents a unique aspect of the climate despite its predictable absence between May and October. The months of January and February record the most snowfall, with January receiving nearly 11" (279mm) of snow. Meanwhile, the shortest daylight and sunshine hours inevitably coincide with these winter months, whereas, daylight hours peak in June, exceeding 15 hours.
The wind levels in this area also vary, with the maximum wind gusts noticed in April. The maximum pressure of 30.07" (764mm) is observed in the month of November. Another notable feature lies in the cloud cover percentage which reaches its peak (72%) during February, rendering fewer hours of sunshine, whereas the minimum cloud cover (35%) is observed in July, allowing for more sunshine.
The best time to visit Williston
Considering the variations in weather conditions throughout the year, the best months to visit Williston would arguably be from June to September. During these months, the temperatures range from 64.9°F (18.3°C) to 78.4°F (25.8°C), perfect for outdoor activities and sightseeing. Despite being the period of greatest rainfall, these months also present longer daylight hours (between 14 and 15.5 hours), paired with maximum sunshine duration. Thus, it ensures ample light for daytime activities.The worst time to visit Williston
Due to sharp temperature drops, the months between November and March can be considered as the least favorable months to visit Williston. Temperatures drop as low as 12°F (-11.1°C), accompanied by high snowfall (from 7.44" (189mm) to 10.98" (279mm)). Combined with shorter daylight hours, the comfort level for outdoor activities reduces significantly. Moreover, the peak cloud cover in February results in fewer sunshine hours, further compounding the cold conditions.Spring weather in Williston
Spring in Williston spans from March to May. Temperatures during this season gradually increase from 35.8°F (2.1°C) in March to up to 64.9°F (18.3°C) by May. Rainfall also increases during this season, with May receiving 2.87" (73mm) of rainfall over 17.1 days. While snowfall is prevalent in early spring, with March recording 7.95" (202mm) of snowfall, it dwindles down to merely 0.63" (16mm) by May.Summer weather in Williston
Summer in Williston stretches from June to August, with temperatures escalating to a pleasant range of 71.8°F (22.1°C) to 78.4°F (25.8°C). These months also experience the highest amount of rainfall, peaking in June with 3.19" (81mm). Nevertheless, long daylight hours from 14.8 to 15.5 hours, coupled with an average of 10 hours of sunshine, make up for the increased rainfall.Autumn weather in Williston
Autumn falls between September to November in Williston. During this time, temperatures gradually drop from 69.3°F (20.7°C) in September to 41.5°F (5.3°C) in November. Over the same period, rainfall volumes increase from 1.77" (45mm) to 2.32" (59mm). Furthermore, daylight hours dwindle from 12.5 hours in September to roughly 9.6 hours by November.Winter weather in Williston
Winter in Williston spans from December to February. During this period, below freezing temperatures are common, dropping to as low as 12°F (-11.1°C) in January. Snowfall peaks at around 10.98" (279mm) in January, significantly reducing visibility. Moreover, with an average daylight duration between 8.9 to 10.5 hours, winter days are notably shorter.Weather in January
January in Williston, Vermont exhibits a quiet weather distinction characterized by relatively cold conditions. The peak temperature averages hover around 24.3°F (-4.3°C), providing an opportunity to indulge in winter activities. Weather in January »Weather in February
The weather pattern in February is quite similar to that of January, albeit with a noticeable rise in temperature. It's a superb month for those who enjoy winter sports, with ski resorts benefiting from the maintained cold conditions. Weather in February »Weather in March
Moving into March, there is a notable shift in weather characteristics in Williston, Vermont. The average highest temperatures slowly creep up to 35.8°F (2.1°C), marking the beginning of the spring thaw. While the snowfall recedes significantly, the rainfall does see a rise, making umbrella a necessary accessory. Weather in March »Weather in April
April marks the transition out of winter completely and the full onset of spring. With temperature highs skyrocketing to 49.6°F (9.8°C), the scenery transforms from a white winter wonderland to a lush green landscape. As the month progresses, the weather gradually becomes more conducive to outdoor activities, including recreational sports and hiking. Weather in April »Weather in May
In May, the people of Williston are greeted with the clear signs of summer's approach - the shift in weather savvy. Although temperatures peak at a comfortable 64.9°F (18.3°C), the absence of intense cold gives rise to mild and pleasant weather. Weather in May »Weather in June
Entering June, Williston, Vermont gets to enjoy the full swing of summer. As the sun scorches, the mercury level rises to an average maximum of 71.8°F (22.1°C). The weather varies slightly throughout the month. Residents can relish the most extended daylight duration of the year, making June the ideal month for outdoor enthusiasts. Weather in June »Weather in July
Despite the minor variations, July is the warmest month of the year in Williston, Vermont with temperatures reaching high averages 78.4°F (25.8°C). With the consistent warmth, it's commonplace to find locals basking in the summer sun. Weather in July »Weather in August
In August, one would notice weather in Williston leaning towards milder ranges. Temperatures slightly dips, yet still hover around a warm 76.5°F (24.7°C), preventing the escape of the summer feel. With the sun-drenched months coming to a close, August provides the perfect opportunity to indulge in the summer before it fades. Weather in August »Weather in September
September marks the start of fall in Williston, Vermont. Witnessing a significant drop in the average high of 69.3°F (20.7°C), slight chill returns to the air, signaling the approach of winter. As leaves change color, Williston transforms into an autumnal spectacle attracting visitors from afar. Weather in September »Weather in October
October is a quintessential fall month in Williston. A further decrease in temperatures is experienced - rarely exceeding 55.2°F (12.9°C). The fall foliage is in its full glory, painting the town in fiery reds, dazzling oranges, and golden yellows. Weather in October »Weather in November
As November commences, Williston, Vermont begins to transition into its white winter phase. Temperatures regularly plummet to a chilling average high of 41.5°F (5.3°C), resulting in the appearance of the first few snowflakes. Weather in November »Weather in December
December in Williston marks the official onset of winter with temperatures settling around 30.2°F (-1°C) on the thermometer scale. The weather system sees a norm change, shifting from irregular rain showers to constant snow filled days. 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
January proves to be the coldest month, recording an average maximum temperature of 24.3°F (-4.3°C) and a minimum temperature of 12°F (-11.1°C).
January and February, with an average relative humidity of 87%, are most humid months in Williston, Vermont.
In Williston, during the entire year, the rain falls for 161.7 days and collects up to 29.33" (745mm) of precipitation.
January through May, October through December are months with snowfall in Williston, Vermont.
Throughout the year, in Williston, there are 94.7 snowfall days, and 50.91" (1293mm) of snow is accumulated.
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Williston.
The month with the most snowfall in Williston, Vermont, is February, when snow falls for 20.6 days and typically aggregates up to 11.73" (298mm) of snow.
February has the least sunshine of the year, with an average of 2.8h of sunshine.
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 months with the lowest humidity in Williston, Vermont, are April and May, with an average relative humidity of 76%.
May through August, with an average maximum UV index of 5, are months with the highest UV index in Williston, Vermont.
The month with the most rainfall in Williston is June, when the rain falls for 18 days and typically aggregates up to 3.19" (81mm) of precipitation.
June through September are months without snowfall in Williston.
With an average of 15h and 30min of daylight, June has the longest days of the year in Williston.
July temperatures in Williston tend to peak at an average high of 78.4°F (25.8°C) and dip to a low of 57.2°F (14°C).
The month with the most sunshine in Williston, Vermont, is July, with an average of 10.2h of sunshine.
September is the month with the least rainfall in Williston. Rain falls for 12 days and accumulates 1.77" (45mm) of precipitation.
December has the shortest days of the year, with an average of 8h and 54min of daylight.
Average temperature
Williston, VT
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (24.3°F).
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure
Williston, VT
- Average pressure in January:
30.02"Hg - Average pressure in February:
30.01"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.05"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Williston, VT
- Average wind speed in January:
7.1mph - Average wind speed in February:
6.8mph - Average wind speed in March:
7mph - Average wind speed in April:
7.3mph - Average wind speed in May:
6.5mph - Average wind speed in June:
5.8mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.7mph - Average wind speed in October:
6.5mph - Average wind speed in November:
6.8mph - Average wind speed in December:
6.8mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity
Williston, VT
The months with the highest relative humidity are January and February (87%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall
Williston, VT
- Average rainfall in January:
2.24" - Average rainfall in February:
2.01" - Average rainfall in March:
2.24" - Average rainfall in April:
2.48" - Average rainfall in May:
2.87" - Average rainfall in June:
3.19"
- Average rainfall in July:
2.44" - Average rainfall in August:
2.64" - Average rainfall in September:
1.77" - Average rainfall in October:
2.83" - Average rainfall in November:
2.32" - Average rainfall in December:
2.28"
The wettest month (with the highest rainfall) is June (3.19").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days
Williston, VT
- Average rainfall days in January:
7.5 days - Average rainfall days in February:
6.2 days - Average rainfall days in March:
12.1 days - Average rainfall days in April:
16.8 days - Average rainfall days in May:
17.1 days - Average rainfall days in June:
18 days
- Average rainfall days in July:
17.2 days - Average rainfall days in August:
16.7 days - Average rainfall days in September:
12 days - Average rainfall days in October:
15.8 days - Average rainfall days in November:
11.6 days - Average rainfall days in December:
10.7 days
The month with the highest number of rainy days is June (18 days).
The month with the least rainy days is February (6.2 days).
Average snowfall
Williston, VT
- Average snowfall in January:
10.98" - Average snowfall in February:
11.73" - Average snowfall in March:
7.95" - Average snowfall in April:
3.86" - Average snowfall in May:
0.63" - Average snowfall in June:
0"
The month with the highest snowfall is February (11.73").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Williston, VT
- Average snowfall days in January:
20.7 days - Average snowfall days in February:
20.6 days - Average snowfall days in March:
16.4 days - Average snowfall days in April:
6.6 days - Average snowfall days in May:
0.8 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:
1.8 days - Average snowfall days in November:
9.7 days - Average snowfall days in December:
18.1 days
The month with the highest number of snowfall days is January (20.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Williston, VT
- Average daylight in January:
9h and 18min - Average daylight in February:
10h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 30min - Average daylight in May:
14h and 48min - Average daylight in June:
15h and 30min
- Average daylight in July:
15h and 6min - Average daylight in August:
14h and 0min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 36min - Average daylight in December:
8h and 54min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January:
2h and 54min - Average sunshine in February:
2h and 48min - Average sunshine in March:
4h and 18min - Average sunshine in April:
6h and 48min - Average sunshine in May:
8h and 12min - Average sunshine in June:
8h and 42min
- Average sunshine in July:
10h and 12min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 42min - Average sunshine in October:
4h and 54min - Average sunshine in November:
4h and 30min - Average sunshine in December:
3h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 2h and 48min).
Average sunshine days
Williston, VT
- Average sunshine days in January:
7.7 days - Average sunshine days in February:
6.8 days - Average sunshine days in March:
8.5 days - Average sunshine days in April:
9.5 days - Average sunshine days in May:
11.9 days - Average sunshine days in June:
10.4 days
- Average sunshine days in July:
11.3 days - Average sunshine days in August:
11.8 days - Average sunshine days in September:
15.9 days - Average sunshine days in October:
12.5 days - Average sunshine days in November:
12.4 days - Average sunshine days in December:
8.3 days
The month with the most sunshine days is September (15.9 days).
The month with the least sunshine days is February (6.8 days).
Average UV index
Williston, VT
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Williston, VT
The month with the most cloud cover is February (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 35).
Average visibility
Williston, VT
The months with the highest visibility are April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February and March (4mi).
