Climate and monthly weather forecastFoster, RI
Climate and monthly weather forecast
The climate of Foster
Foster, Rhode Island, USA rests under the Köppen climate classification of Cfb, marking it as an area with a marine west coast and warm summer climate. Foster experiences a varied climate throughout the year that sees noticeable fluctuations in temperature, precipitation, and daylight hours.Seasonal temperature changes in Foster are substantial, with recorded monthly average high temperatures ranging from a mild 33.4°F (0.8°C) in the winter months to a warm 81.1°F (27.3°C) in the height of summer. Respectively, monthly average low temperatures fluctuate from a chilly 21.6°F (-5.8°C) in colder times to 63.1°F (17.3°C) during summer. Humidity levels remain relatively consistent throughout the year, averaging between 73% and 79%.
Rainfall in Foster does not follow a uniform pattern, with the highest average rainfall of 3.43" (87mm) recorded in December and the lowest of 1.81" (46mm) in September. Foster sees precipitation in many forms, with rainfall days varying from 8.3 to a maximum of 17.5 days in any given month, and snowfall ranging from zero about half of the year to a peak of 3.7" (94mm) in March.
The best time to visit Foster
In consideration of the prevailing weather conditions, the ideal period to visit Foster would be between June and August. During these summer months, the average temperatures are at their peak, with highs reaching up to 81.1°F (27.3°C) and lows hovering around a comfortable 63.1°F (17.3°C). Furthermore, daylight hours are extremely generous during this span, with a staggering average of 15.2 hours of daylight in June. Visitors can also expect relatively low wind speeds during these months, ranging from 6mph (9.7km/h) to 6.5mph (10.5km/h).The worst time to visit Foster
Contrarily, the most unfavorable time to venture to Foster can be considered to be between December and February. Average temperatures during these winter months plummet to lows of 21.6°F (-5.8°C) and highs only reach up to 36.7°F (2.6°C). Daylight is also scarce in this period with just 9.2 to 10.6 hours in these months. Moreover, December records the highest average rainfall of 3.43" (87mm), combined with snowfall peaking at 3.66" (93mm) in February, leading to low visibility and disturbances in outdoor plans.Spring Weather in Foster
Spring in Foster begins mildly with temperatures in March averaging a high of 43.5°F (6.4°C) and a low of 29.5°F (-1.4°C). As the season progresses to May, the city begins to warm, with high temperatures soaring to a comfortable 66.7°F (19.3°C) and lows leveling at 48.9°F (9.4°C). The frequency of rainfall days is high in Spring, seeing an increase from 11.9 days in March to 16.9 days in May. The occurrence of snowfall in spring is minimal, particularly from April onward.Summer weather in Foster
Summers in Foster are generally warm and pleasant. June initiates the summer months with an average high temperature of 74.1°F (23.4°C) and a low temperature of around 55.9°F (13.3°C). As summer advances into August, high temperatures slightly increase, reaching up to 79.7°F (26.5°C), with the lows resting at 61.9°F (16.6°C). Rainfall during summer is moderate, with an average of 16.6 to 17.5 rainfall days per month, and no occurrence of snowfall.Autumn weather in Foster
Autumn brings a cooling trend to Foster. September greets the start of Autumn with high temperatures averaging 72.3°F (22.4°C) and lows averaging 55.4°F (13°C). As November rolls in, the climate becomes considerably cooler with the average high dropping to 49.1°F (9.5°C) and the average low dipping to 36.1°F (2.3°C). Rainfall days see a decrease in frequency during Autumn, going from 14 days in September to 10.5 days in November.Winter weather in Foster
Winter in Foster is defined by colder temperatures and occasional snowfall. The season starts in December with the high temperature averaging 39.4°F (4.1°C) and the low temperature dropping to 28.8°F (-1.8°C). By February, highs slightly decrease to 36.7°F (2.6°C) with lows around 22.3°F (-5.4°C). Along with the recorded high levels of snowfall and rainfall in December and February, winter weather in Foster can prove challenging for outdoor recreational activities.Weather in January
The new year commences with chilly temperatures typical for winter in Foster, Rhode Island. January sets the scene with snowflakes, witnessing snowfall spanning 2.91" (74mm) over approximately 7.8 days. The weather can fluctuate between 21.6°F (-5.8°C) and 33.4°F (0.8°C). Weather in January »Weather in February
As the calendar flips to February, the cold weather persists with no significant change in temperatures from the previous month. The city experiences a slight increase in snowfall, recording an average of 3.66" (93mm). Moving steadily through the winter, the wintry winds touch the rate of 9.2mph (14.8km/h). Weather in February »Weather in March
The signal of spring begins to ripple through Foster in March. Temperatures start to rise gradually with lows of 29.5°F (-1.4°C) and highs of 43.5°F (6.4°C). Witnessing another 3.7" (94mm) of snowfall, the wintery charm hangs in the air still. Weather in March »Weather in April
With April comes an evident change in the seasons, welcoming spring in its full glory. Temperatures see a noticeable increase, the weather warming up to highs of 55.6°F (13.1°C). The month marks the melting of snow, accounting for a minimal snowfall of 0.43" (11mm). Weather in April »Weather in May
May signals the approach of summer with temperatures continuing to climb. Hovering between 48.9°F (9.4°C) to 66.7°F (19.3°C), the mild clime is perfect for al fresco dining or tackling outdoor projects. Snowfall is virtually absent this month, making way for the summer sun to bathe Foster in its warmth. Weather in May »Weather in June
In June, Foster begins to experience genuine summer weather. The temperatures peak, hitting an average high of 74.1°F (23.4°C). A notable characteristic of June is the 15.2-hour daylight, extended evenings providing more hours to enjoy the summer. Weather in June »Weather in July
July sees Foster basking in the heart of summer. It is the warmest month, boasting an average high temperature of 81.1°F (27.3°C). The occasional summer storm is usual, contributing to Foster's green landscapes. Gulf breezes temper the warm air, ensuring a sense of balance. Weather in July »Weather in August
As August rolls in, residents enjoy the lingering summer warmth. Although a slight dip in temperature occurs with a high average of 79.7°F (26.5°C), it still feels unmistakably summery. Experiencing a downfall of 2.83" (72mm) of rainfall, the month guarantees its share of refreshing drizzles. Weather in August »Weather in September
The fall begins to creep in during September in Foster. Merely hinting at the autumn season, the mercury drops to 72.3°F (22.4°C) for highs and 55.4°F (13°C) for lows. The rainfall also sees a reduced measure of about 1.81" (46mm). Weather in September »Weather in October
October comes with the true essence of autumn in Foster. The weather undergoes another temperature descent, marking highs of about 60.8°F (16°C) and lows of 46.6°F (8.1°C). Colorful foliage decorates the city, as leaves continue to change and fall. Weather in October »Weather in November
November is the harbinger of winter in Foster. The winds start picking up pace, with an average speed of 8.3mph (13.4km/h). As the month proceeds, the mercury drops further, plunging to an average high and low of 49.1°F (9.5°C) and 36.1°F (2.3°C), respectively. Weather in November »Weather in December
December marks the arrival of winter in Foster. The snowfall averages 2.48" (63mm), and the temperatures hover from 28.8°F (-1.8°C) to 39.4°F (4.1°C). An increase in cloudy days and decreased sunshine are usual traits this month. Weather in December »Updated: Aug 7, 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, with its high-temperature average of 33.4°F (0.8°C) and a low-temperature average of 21.6°F (-5.8°C), is the coldest month.
In Foster, during the entire year, the rain falls for 163 days and collects up to 33.86" (860mm) of precipitation.
January through May, November and December are months with snowfall.
Throughout the year, there are 30.6 snowfall days, and 14.02" (356mm) of snow is accumulated.
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
February, June, July, September and October, with an average relative humidity of 79%, are most humid months.
The month with the least sunshine is February, with an average of 4.7h of sunshine.
March is the month with the most snowfall. Snow falls for 7.3 days and accumulates 3.7" (94mm) of snow.
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 is the least humid month, with an average relative humidity of 73%.
In Foster, snow does not fall in June through October.
With an average of 15h and 12min of daylight, June has the longest days of the year.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
In Foster, July records the average highest temperatures, peaking at 81.1°F (27.3°C) and reaching a low of 63.1°F (17.3°C).
The months with the most sunshine are July and August, with an average of 10.2h of sunshine.
September is the month with the least rainfall. Rain falls for 13.6 days and accumulates 1.81" (46mm) of precipitation.
December is the month with the most rainfall. Rain falls for 11.5 days and accumulates 3.43" (87mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 12min of daylight.
Average temperature
Foster, RI
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (33.4°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 (21.6°F).
Average pressure
Foster, RI
- Average pressure in January:
30.02"Hg - Average pressure in February:
30"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:
30.06"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.04"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Foster, RI
- Average wind speed in January:
9.3mph - Average wind speed in February:
9.2mph - Average wind speed in March:
9.2mph - Average wind speed in April:
8.6mph - Average wind speed in May:
7.3mph - Average wind speed in June:
6.5mph
- Average wind speed in July:
6mph - Average wind speed in August:
5.9mph - Average wind speed in September:
6.5mph - Average wind speed in October:
7.8mph - Average wind speed in November:
8.3mph - Average wind speed in December:
8.8mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity
Foster, RI
The months with the highest relative humidity are February, June, July, September and October (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall
Foster, RI
- Average rainfall in January:
2.52" - Average rainfall in February:
2.32" - Average rainfall in March:
2.72" - Average rainfall in April:
3.15" - Average rainfall in May:
2.8" - Average rainfall in June:
3.07"
- Average rainfall in July:
3.31" - Average rainfall in August:
2.83" - Average rainfall in September:
1.81" - Average rainfall in October:
3.03" - Average rainfall in November:
2.87" - Average rainfall in December:
3.43"
The wettest month (with the highest rainfall) is December (3.43").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days
Foster, RI
- Average rainfall days in January:
8.3 days - Average rainfall days in February:
9.3 days - Average rainfall days in March:
11.9 days - Average rainfall days in April:
15.9 days - Average rainfall days in May:
16.9 days - Average rainfall days in June:
17 days
- Average rainfall days in July:
17.5 days - Average rainfall days in August:
16.6 days - Average rainfall days in September:
13.6 days - Average rainfall days in October:
14 days - Average rainfall days in November:
10.5 days - Average rainfall days in December:
11.5 days
The month with the highest number of rainy days is July (17.5 days).
The month with the least rainy days is January (8.3 days).
Average snowfall
Foster, RI
- Average snowfall in January:
2.91" - Average snowfall in February:
3.66" - Average snowfall in March:
3.7" - Average snowfall in April:
0.43" - Average snowfall in May:
0.28" - Average snowfall in June:
0"
The month with the highest snowfall is March (3.7").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days
Foster, RI
- Average snowfall days in January:
7.8 days - Average snowfall days in February:
7.7 days - Average snowfall days in March:
7.3 days - Average snowfall days in April:
1.2 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:
1.4 days - Average snowfall days in December:
5 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight / Average sunshine
Foster, RI
- 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:
5h and 0min - Average sunshine in February:
4h and 42min - Average sunshine in March:
5h and 54min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 12min - Average sunshine in June:
9h and 0min
- Average sunshine in July:
10h and 12min - Average sunshine in August:
10h and 12min - Average sunshine in September:
8h and 24min - Average sunshine in October:
5h and 48min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 48min
The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days
Foster, RI
- Average sunshine days in January:
16.8 days - Average sunshine days in February:
13.8 days - Average sunshine days in March:
13.2 days - Average sunshine days in April:
12.6 days - Average sunshine days in May:
12.1 days - Average sunshine days in June:
10.6 days
- Average sunshine days in July:
11.3 days - Average sunshine days in August:
11.8 days - Average sunshine days in September:
14.6 days - Average sunshine days in October:
14.2 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
15.8 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (10.6 days).
Average UV index
Foster, 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, November and December (UV index 2).
Average cloud cover
Foster, RI
The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility
Foster, RI
The months with the highest visibility are January, February, March, April, October, November and December (6mi).
The months with the lowest visibility are May, June, July, August and September (5mi).
