Climate and monthly weather forecastJamestown, NY
Climate and monthly weather forecast
The climate of Jamestown
Jamestown, a city tucked away in New York, USA, is nestled in a climatic zone typically characterized as a Humid Continental climate according to the Köppen climate classification, specifically the Dfb subtype. This designation describes a region with no dry season but a warm summer. Throughout the year, Jamestown undergoes changes in its climate parameters, illustrating the varied nature of its weather patterns.The temperature in Jamestown exhibits notable variation throughout the year, spanning from a chilly 17.6°F (-8°C) in January to a relatively warm 75.9°F (24.4°C) in July. Similar fluctuations can be seen in humidity, though its changes are more modest, from a low average of 81% in April, May, and September to a higher spectrum peaking at 89% in February. Rainfall too is a common occurrence in this city with an annual trend that dips to a minimal 1.81" (46mm) in September and soars to 2.83" (72mm) in October. Noticeably, snowfall is a prominent feature of Jamestown's climate, particularly between the months of December to February with a peak at 7.68" (195mm) in December.
The level of sunlight exposure and the length of the day also vary with the season, with longer daylight hours recorded between May to July (14.6 hours to 15.2 hours) coupled with high sunshine durations (8.7 hours to 10 hours). Conversely, shorter daylight hours are observed between December to February, from 9.2 hours to 10.6 hours, with corresponding low sunshine durations of 2.3 hours to 2.8 hours. Wind speeds remain fairly stable throughout the year but register slight increases during the colder months.
The best time to visit Jamestown
Tourist preferences vary, yet Jamestown’s summer months from June to August provide a relatively warm and inviting climate for visitors. During this time, average temperatures hover around 70.5°F (21.4°C) to 75.9°F (24.4°C) complemented by slightly reduced rainfall. Days are long and sunny, providing ample daylight for sightseeing and other outdoor activities.The worst time to visit Jamestown
The city’s harsh winter months from December to February may pose a bit of a challenge for some visitors. These months bring about lower temperatures, falling between 17.6°F (-8°C) to 28°F (-2.2°C) on average, coupled with increased snowfall that can reach up to 7.68" (195mm) in December.Spring weather in Jamestown
Spring in Jamestown commences with a swift departure from winter’s biting cold. Temperatures start to ascend, moving from an average low of 25.9°F (-3.4°C) in March to a more temperate 51.3°F (10.7°C) by April. However, this period also witnesses a substantial increase in the volume of rainfall, reaching 2.8" (71mm) in both April and May.Summer weather in Jamestown
Summer ushers in the warmest months in Jamestown, with temperatures peaking at around 75.9°F (24.4°C) in July. Rainfall does reduce slightly during this period with a low of 2.13" (54mm) in August. These months are also highlighted by longer daylight hours and maximum sunlight exposure, making it ideal for outdoor pursuits.Autumn weather in Jamestown
Autumn in Jamestown takes a cooler turn with temperatures beginning to recede from the height of summer, settling at 69.4°F (20.8°C) in September. Rainfall, however, increases, peaking at 2.83" (72mm) in October making this period marginally wetter.Winter weather in Jamestown
Winter brings with it a drop in the thermometer and an increase in snowfall. December marks the start of the coldest months in Jamestown with average temperatures lowering to 28°F (-2.2°C) and snowfall escalating up to the annual peak of 7.68" (195mm). Cloud cover also increases during this period, making the winter months the least sunny and the shortest days of the year.Weather in January
January brings the chill of winter to Jamestown, New York, with frequent snow and icy conditions. Averaging 7.05" (179mm), it brings one of the highest snowfalls of the year. The city remains mostly cloudy due to high humidity levels, causing the sun to peer through on only a few days. Weather in January »Weather in February
While Spring is still afar, Jamestown weather in February brings subtle shifts. Statistically, February, with average lows of 18.9°F (-7.3°C), is marginally less frosty than the preceding month. The amount of daylight increases, hinting at the upcoming change of seasons. Weather in February »Weather in March
March is a pivotal month for Jamestown weather as it signifies a transition from winter to spring. The city receives 3.31" (84mm) of snow, signaling a marked decrease from the more intense winter months. It's the period when the harshness of winter begins to ease off, with a few more sunshine hours and less cloudy skies. Weather in March »Weather in April
April marks a significant change in Jamestown’s weather. The month shows visible signs of spring, with the weather warming to an average high of 51.3°F (10.7°C). Snowfall becomes almost negligible, with a notable shift from snowy to rainy conditions. Weather in April »Weather in May
May in Jamestown finally ushers in the mild, pleasant spring weather. No snow is expected this month, marking a distinct change from the city's winter conditions. Rainfall is the dominant form of precipitation, encouraging the blooming of flora across the city. Weather in May »Weather in June
June is when summer starts to take hold in Jamestown. Even though the month sees a few rainy days, June, with average highs of 70.5°F (21.4°C), is predominantly fair and warm. It's a time of transition again, with days getting longer and receiving the year’s maximum sunlight. Weather in June »Weather in July
July is typically the warmest month in Jamestown with average high temperatures reaching 75.9°F (24.4°C). It marks the peak of summer, with the highest number of sunshine hours. Days turn out to be hot, complimented by relatively cooler nights, which are a trademark of Jamestown’s summer. Weather in July »Weather in August
August in Jamestown carries forward the summer momentum from July but hints at slight cooling. This month brings the highest average low temperature of 58.1°F (14.5°C). Generally, the weather remains warm but starts exhibiting signs of an incoming fall towards the month's end. Weather in August »Weather in September
September is when fall starts to show its colors in Jamestown. The warm days of summer gradually give way to cooler and shorter days. Daylight diminishes, and the weather transitions to typical autumn conditions. Rainfall slightly increases, leading the city to the wetter part of the year. Weather in September »Weather in October
October in Jamestown is full-blown autumn, accompanied by a significant drop in temperatures. With its high rainfall of 2.83" (72mm), October is one of the rainiest months in Jamestown. Crisp mornings and evenings, along with changing foliage, provide a quintessential fall experience. Weather in October »Weather in November
Winter starts to creep back into Jamestown with the arrival of November. Snow again becomes part of the forecast, with the month seeing an average of 4.72" (120mm). The decrease in temperatures marks a sharp turnaround from the mild weather of recent months. Weather in November »Weather in December
December firmly establishes the winter climate in Jamestown. With chilly temperatures hovering around the average low of 25.9°F (-3.4°C), December is far removed from the warm, balmy months of summer. Snowfall increases and puts the city into full winter mode. Weather in December »Updated: Feb 13, 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
The month of January sees the average lowest temperatures, reaching 28°F (-2.2°C) at the peak and 17.6°F (-8°C) at the low.
Throughout the year, in Jamestown, New York, there are 163.4 rainfall days, and 27.72" (704mm) of precipitation is accumulated.
Months with snowfall in Jamestown are January through May, October through December.
Throughout the year, in Jamestown, there are 85.6 snowfall days, and 32.91" (836mm) of snow is accumulated.
The month with the least sunshine in Jamestown is January, with an average of 2.3h of sunshine.
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Jamestown.
With an average relative humidity of 89%, February is the most humid month.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Jamestown, 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 are April, May and September, with an average relative humidity of 81%.
May through August, with an average maximum UV index of 5, are months with the highest UV index in Jamestown, New York.
June through September are months without snowfall.
The month with the longest days is June, with an average of 15h and 12min of daylight.
July is the warmest month in Jamestown, New York, with an average high-temperature of 75.9°F (24.4°C) and an average low-temperature of 59.4°F (15.2°C).
The months with the most sunshine in Jamestown, New York, are July and August, with an average of 10h of sunshine.
September is the month with the least rainfall. Rain falls for 14.3 days and accumulates 1.81" (46mm) of precipitation.
October is the month with the most rainfall. Rain falls for 17.2 days and accumulates 2.83" (72mm) of precipitation.
December is the month with the most snowfall. Snow falls for 17.1 days and accumulates 7.68" (195mm) of snow.
December has the shortest days of the year, with an average of 9h and 12min of daylight.
Average temperature
Jamestown, NY
The warmest month (with the highest average high temperature) is July (75.9°F).
The month with the lowest average high temperature is January (28°F).
The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).
Average pressure
Jamestown, NY
- Average pressure in January:
30.07"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
29.99"Hg - Average pressure in June:
29.93"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:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.07"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Jamestown, NY
- Average wind speed in January:
11.1mph - Average wind speed in February:
10.3mph - Average wind speed in March:
9.6mph - Average wind speed in April:
9.5mph - Average wind speed in May:
7.8mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6.4mph - Average wind speed in August:
6.6mph - Average wind speed in September:
7.1mph - Average wind speed in October:
9mph - Average wind speed in November:
9.8mph - Average wind speed in December:
10.4mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).
Average humidity
Jamestown, NY
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are April, May and September (81%).
Average rainfall
Jamestown, NY
- Average rainfall in January:
2.2" - Average rainfall in February:
2.05" - Average rainfall in March:
1.93" - Average rainfall in April:
2.8" - Average rainfall in May:
2.8" - Average rainfall in June:
2.44"
- Average rainfall in July:
2.48" - Average rainfall in August:
2.13" - Average rainfall in September:
1.81" - Average rainfall in October:
2.83" - Average rainfall in November:
2.01" - Average rainfall in December:
2.24"
The wettest month (with the highest rainfall) is October (2.83").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days
Jamestown, NY
- Average rainfall days in January:
6.9 days - Average rainfall days in February:
7.5 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
16.8 days - Average rainfall days in May:
17.5 days - Average rainfall days in June:
15.4 days
- Average rainfall days in July:
18.3 days - Average rainfall days in August:
16.8 days - Average rainfall days in September:
14.3 days - Average rainfall days in October:
17.2 days - Average rainfall days in November:
11.6 days - Average rainfall days in December:
9.8 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is January (6.9 days).
Average snowfall
Jamestown, NY
- Average snowfall in January:
7.05" - Average snowfall in February:
6.89" - Average snowfall in March:
3.31" - Average snowfall in April:
2.4" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The month with the highest snowfall is December (7.68").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Jamestown, NY
- Average snowfall days in January:
20.7 days - Average snowfall days in February:
17.6 days - Average snowfall days in March:
11.7 days - Average snowfall days in April:
5.2 days - Average snowfall days in May:
1 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:
1.9 days - Average snowfall days in November:
10.4 days - Average snowfall days in December:
17.1 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
Jamestown, NY
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
2h and 18min - Average sunshine in February:
2h and 48min - Average sunshine in March:
5h and 0min - Average sunshine in April:
7h and 0min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 18min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 36min - Average sunshine in October:
4h and 30min - Average sunshine in November:
4h and 0min - Average sunshine in December:
2h and 24min
The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days
Jamestown, NY
- Average sunshine days in January:
5.6 days - Average sunshine days in February:
6.4 days - Average sunshine days in March:
10.5 days - Average sunshine days in April:
9.8 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
11.8 days
- Average sunshine days in July:
10.3 days - Average sunshine days in August:
10.8 days - Average sunshine days in September:
12.5 days - Average sunshine days in October:
11.5 days - Average sunshine days in November:
10.5 days - Average sunshine days in December:
6.1 days
The month with the most sunshine days is September (12.5 days).
The month with the least sunshine days is January (5.6 days).
Average UV index
Jamestown, NY
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
Jamestown, NY
The month with the most cloud cover is January (Cloud cover 79).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility
Jamestown, NY
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (4mi).
