Climate and monthly weather forecastJamestown, RI
Climate and monthly weather forecast
The climate of Jamestown
Nestled in Rhode Island, USA, Jamestown experiences a Humid subtropical climate with no dry season according to the Köppen climate classification. This type of climate is designated as 'Cfa', which best describes the overall year-round conditions. Ranging from 26.4°F (-3.1°C) to 78.3°F (25.7°C), temperatures fluctuate significantly over the course of the year. Relative humidity remains mostly consistent from 73% to 81%, creating a moderately humid environment throughout the year.From a perspective of precipitation, the average monthly rainfall spans the entirety of the year, with a marked increase in October showing 3.27" (83mm). Snowfall is minimal with the highest recorded in February at 2.76" (70mm). Even sunshine hours per day see a notable variation through the year, with a maximum of 10.5 hours in August and a minimum of 4.9 hours in December. The wind speed holds at an average range from 8.1mph (13km/h) to 12.1mph (19.5km/h), with gusts reaching up to 18.8mph (30.3km/h).
One unique aspect of Jamestown's climate is the month of July, which sees the hottest temperatures with highs of 78.3°F (25.7°C), despite having relatively moderate rainfall. On the contrary, January stands as the coldest month with temperatures dipping down to 26.4°F (-3.1°C), amid a comparatively high relative humidity of 75%.
The best time to visit Jamestown
A visit to Jamestown could be planned ideally between May and September. During these months, the weather is warm and pleasant, with temperatures peaking at an average high of 70.5°F (21.4°C) in June to 77.7°F (25.4°C) in August. Days are longer with up to 15.1 daylight hours in June, providing ample time to explore and enjoy the locale. Also, rainfall is at its lowest average in September, registering at 1.42" (36mm).The worst time to visit Jamestown
Travelers might want to avoid a trip to Jamestown between November and February. These months correspond to the coldest period of the year, with temperatures falling to an average low of 33.1°F (0.6°C) in December. In addition to the cold, this period also experiences the highest snowfall with February receiving 2.76" (70mm). Moreover, daylight hours diminish to 9.2 in December.Spring weather in Jamestown
Spring emerges in Jamestown from March to May, bringing mild temperatures averaging from 33.1°F (0.6°C) to 62.6°F (17°C). Rainfall is relatively high, reaching up to 2.95" (75mm) in April. Despite this, the duration of sunlight increases significantly during this season providing between 12 to 14.5 daylight hours in May.Summer weather in Jamestown
Jamestown celebrates summer between June and August. This period is characterized by the warmest temperatures ranging from 58.8°F (14.9°C) to a peak of 78.3°F (25.7°C). Yet, the rainfall doesn't exceed an average of 2.44" (62mm). A typical summer day in Jamestown offers up to 15.1 hours of daylight in June, alongside enhanced visibility of 6 miles.Autumn weather in Jamestown
The transition into autumn from September to November comes along with a drop in temperatures, sliding from 59.7°F (15.4°C) to 40.6°F (4.8°C). While October sees the highest precipitation of the year at 3.27" (83mm), daylight hours gradually decrease from 12.5 to 9.9 hours by November.Winter weather in Jamestown
Winter envelopes Jamestown from December to February, with temperatures plunging between 26.4°F (-3.1°C) to 37.9°F (3.3°C). This season registers the highest snowfall, 2.76" (70mm), in February. Visibility remains constant at 6 miles throughout this cold season. Finally, daylight hours shrink to the shortest at 9.2 hours during December.Weather in January
When January arrives in Jamestown, Rhode Island, residents prepare for the arrival of winter's cold bite. Often shrouded in dense cloud cover, accounting for an average of 45% of the month, the city assumes a grey hue, creating a serene ambiance. Weather in January »Weather in February
February acts as an extension of the winter season, maintaining a steady rhythm with January’s frigid weather. Jamestown continues to experience a dominance of cloudiness, with overcast skies looming over its horizon. However, the increase of daylight hours and a higher average relative humidity of 76% suggest the slow but sure approach of spring. Weather in February »Weather in March
March represents the turning point in Jamestown's weather cycle, as the chilling grip of winter loosens and hints of spring grace the city. Sunrise starts to catch up with the alarm clock, as the daylight duration increases to 12 hours. Weather in March »Weather in April
April finds Jamestown in the heart of spring. Blooming flowers find welcoming conditions, with higher temperatures and ample availability of water from frequent rain showers. The atmosphere takes a turn towards warmth, with the average high temperature making its way up to the fifties. Weather in April »Weather in May
May is the bearer of late spring in Jamestown, heralding warmer temperatures and sunnier skies. The city embraces a livelier atmosphere, with longer daylight hours encouraging outdoor activities. Sea temperatures also start to rise, opening the door for a host of water-related pastimes, thus making it an excellent time for tourists to soak in Jamestown’s coastal charm. Weather in May »Weather in June
As the first month of summer, June marks the arrival of warm weather that transforms Jamestown, Rhode Island into a sunny paradise. The city wakes up to longer days with daylight stretching up to 15.1 hours, promising ample time for sun-soaked activities. Weather in June »Weather in July
If one were to bottle up a quintessential New England summer's essence, July in Jamestown, Rhode Island, would be it. Sunshine rules the day, while the sea, now warmed up to 67.4°F (19.7°C), welcomes residents and tourists alike. Weather in July »Weather in August
August in Jamestown, Rhode Island, retains the atmosphere of a high-summer month, despite being a herald of the coming fall season. The long-lasting daylight continues, giving ample time for outdoor activities under the warm summer sun. Weather in August »Weather in September
September casts a unique spell over Jamestown, marking the transition from the dog days of summer to the crisp arrival of fall. The winds begin to pick up, bearing the aroma of changing leaves and the promise of the harvest season ahead. Weather in September »Weather in October
In October, Jamestown, Rhode Island, is awash with the romantic hues of autumn. The sea and air start to shed their summer warmth, with temperatures dropping to more refreshing and crisp levels. Dying sunlight is replaced with a setting sun that saturates the sky with a myriad of warm tones. Weather in October »Weather in November
November is the bearer of chilly weather in Jamestown, preparing the stage for the arrival of winter. The temperature drops significantly, causing the sea to cool and winds to gain an icy edge. As daylight hours dwindle, the city witnesses the departure of the vibrant autumn hues, replaced with barren trees and an overall quieter ambiance. Weather in November »Weather in December
December in Jamestown, Rhode Island, completes the annual weather cycle with a definitive arrival of winter. The temperature drops to a frigid 42.4°F (5.8°C), and the average sea temperature gets down to 48.1°F (8.9°C), introducing Year's End with a blast of chilling winds. Weather in December »Updated: Feb 13, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Jamestown, Rhode Island, the average lowest temperatures are observed in January, with a high of 36.1°F (2.3°C) and a low of 26.4°F (-3.1°C).
In Jamestown, during the entire year, the rain falls for 148.1 days and collects up to 29.65" (753mm) of precipitation.
Months with snowfall are January through March, May, November and December.
In Jamestown, during the entire year, snow falls for 22.9 days and aggregates up to 8.78" (223mm) of snow.
January through March and December, with an average maximum UV index of 2, are months with the lowest UV index in Jamestown.
February is the month with the most snowfall in Jamestown. Snow falls for 6.2 days and accumulates 2.76" (70mm) of snow.
The month with the coldest seawater in Jamestown, Rhode Island, is February, with an average ocean temperature of 38.1°F (3.4°C).
With an average of 4.8h of sunshine, February has the least sunshine of the year in Jamestown.
The least humid month in Jamestown is March, with an average relative humidity of 73%.
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.
April, June through October are months without snowfall in Jamestown.
June is the most humid month in Jamestown, with an average relative humidity of 81%.
June has the longest days of the year in Jamestown, Rhode Island, with an average of 15h and 6min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index.
Jamestown's warmest month, July, generally records average temperatures ranging from a high of 78.3°F (25.7°C) to a low of 66.7°F (19.3°C).
With an average ocean temperature of 69.6°F (20.9°C), August is the month with the warmest seawater.
August has the most sunshine of the year in Jamestown, Rhode Island, with an average of 10.5h of sunshine.
The month with the least rainfall is September, when the rain falls for 11.6 days and typically collects 1.42" (36mm) of precipitation.
The month with the most rainfall in Jamestown, Rhode Island, is October, when the rain falls for 13.4 days and typically aggregates up to 3.27" (83mm) of precipitation.
December has the shortest days of the year, with an average of 9h and 12min of daylight.
Average temperature
Jamestown, RI
The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (36.1°F).
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).
Average pressure
Jamestown, RI
- Average pressure in January:
30.01"Hg - Average pressure in February:
29.99"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.95"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:
30.07"Hg - Average pressure in December:
30.03"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Jamestown, RI
- Average wind speed in January:
12.1mph - Average wind speed in February:
11.9mph - Average wind speed in March:
11.9mph - Average wind speed in April:
11.1mph - Average wind speed in May:
9.6mph - Average wind speed in June:
8.8mph
- Average wind speed in July:
8.3mph - Average wind speed in August:
8.1mph - Average wind speed in September:
9mph - Average wind speed in October:
10.6mph - Average wind speed in November:
11.2mph - Average wind speed in December:
11.6mph
The windiest month (with the highest average wind speed) is January (12.1mph).
The calmest month (with the lowest average wind speed) is August (8.1mph).
Average humidity
Jamestown, RI
The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is March (73%).
Average rainfall
Jamestown, RI
- Average rainfall in January:
2.6" - Average rainfall in February:
2.36" - Average rainfall in March:
2.83" - Average rainfall in April:
2.95" - Average rainfall in May:
2.09" - Average rainfall in June:
2.44"
- Average rainfall in July:
2.01" - Average rainfall in August:
2.09" - Average rainfall in September:
1.42" - Average rainfall in October:
3.27" - Average rainfall in November:
2.36" - Average rainfall in December:
3.23"
The wettest month (with the highest rainfall) is October (3.27").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days
Jamestown, RI
- Average rainfall days in January:
8.3 days - Average rainfall days in February:
9.4 days - Average rainfall days in March:
12.1 days - Average rainfall days in April:
15.6 days - Average rainfall days in May:
14.8 days - Average rainfall days in June:
14.5 days
- Average rainfall days in July:
14.5 days - Average rainfall days in August:
11.8 days - Average rainfall days in September:
11.6 days - Average rainfall days in October:
13.4 days - Average rainfall days in November:
10.6 days - Average rainfall days in December:
11.5 days
The month with the highest number of rainy days is April (15.6 days).
The month with the least rainy days is January (8.3 days).
Average snowfall
Jamestown, RI
The month with the highest snowfall is February (2.76").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days
Jamestown, RI
- Average snowfall days in January:
6.6 days - Average snowfall days in February:
6.2 days - Average snowfall days in March:
5.2 days - Average snowfall days in April:
0.2 days - Average snowfall days in May:
0.2 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:
0.7 days - Average snowfall days in December:
3.8 days
The month with the highest number of snowfall days is January (6.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature
Jamestown, RI
The best month for swimming (with the highest average sea temperature) is August (69.6°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).
Average daylight / Average sunshine
Jamestown, RI
- Average daylight in January:
9h and 36min - 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 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - 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 54min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
5h and 12min - Average sunshine in February:
4h and 48min - Average sunshine in March:
6h and 0min - Average sunshine in April:
8h and 18min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 12min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
10h and 30min - Average sunshine in September:
8h and 42min - Average sunshine in October:
6h and 18min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 54min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days
Jamestown, RI
- Average sunshine days in January:
15.6 days - Average sunshine days in February:
14 days - Average sunshine days in March:
14.4 days - Average sunshine days in April:
12.3 days - Average sunshine days in May:
14.9 days - Average sunshine days in June:
13.4 days
- Average sunshine days in July:
14.7 days - Average sunshine days in August:
16.9 days - Average sunshine days in September:
15.8 days - Average sunshine days in October:
15.1 days - Average sunshine days in November:
17.7 days - Average sunshine days in December:
15.5 days
The month with the most sunshine days is November (17.7 days).
The month with the least sunshine days is April (12.3 days).
Average UV index
Jamestown, RI
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, March and December (UV index 2).
Average cloud cover
Jamestown, RI
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility
Jamestown, RI
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).
