Climate and monthly weather forecastSmithtown, NY
Climate and monthly weather forecast
Weather in January
January, like December, in Smithtown, New York, is an icy winter month, with an average temperature varying between 37.6°F (3.1°C) and 28.9°F (-1.7°C). Smithtown's temperature records reveal January as the coldest month, marked by average highs of 37.6°F (3.1°C) and lows of 28.9°F (-1.7°C). Weather in January »Weather in February
The last month of the winter, February, is another cold month in Smithtown, New York, with an average temperature varying between 39°F (3.9°C) and 30.2°F (-1°C). Transitioning from January to February, Smithtown observes an average high-temperature of a still icy 39°F (3.9°C), differing subtly from the previous month. Weather in February »Weather in March
March, the first month of the spring in Smithtown, is a frosty month, with temperature in the range of an average high of 44.2°F (6.8°C) and an average low of 36.1°F (2.3°C). Smithtown marks the onset of March with an average high-temperature of a chilly 44.2°F (6.8°C), a subtle shift from February's 39°F (3.9°C). Weather in March »Weather in April
April is a fresh spring month in Smithtown, New York, with an average temperature fluctuating between 45°F (7.2°C) and 53.1°F (11.7°C). April marks a minor ascent in the average high-temperature, adjusting from March's frosty 44.2°F (6.8°C) to a cool 53.1°F (11.7°C). Weather in April »Weather in May
The last month of the spring, May, is an enjoyable month in Smithtown, New York, with temperature in the range of an average low of 54°F (12.2°C) and an average high of 62.6°F (17°C). May's onset brings a temperature rise, moving from a cool 53.1°F (11.7°C) in April to an enjoyable 62.6°F (17°C). Weather in May »Weather in June
The first month of the summer, June, is an agreeable month in Smithtown, New York, with an average temperature ranging between max 71.8°F (22.1°C) and min 63.5°F (17.5°C). June's arrival signals an increase in average high-temperatures, moving from May's refreshing 62.6°F (17°C) to an agreeable 71.8°F (22.1°C). Weather in June »Weather in July
July is a warm summer month in Smithtown, New York, with an average temperature varying between 71.2°F (21.8°C) and 79.3°F (26.3°C). Smithtown records the warmest temperatures in July, averaging a high of 79.3°F (26.3°C) and a low of 71.2°F (21.8°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Smithtown, New York, with an average temperature ranging between max 78.6°F (25.9°C) and min 71.6°F (22°C). In the transition from July to August, Smithtown reports an average high-temperature of a still warm 78.6°F (25.9°C), indicating a close resemblance to the prior month. Weather in August »Weather in September
September, the first month of the autumn in Smithtown, is also an agreeable month, with an average temperature fluctuating between 72.3°F (22.4°C) and 64.8°F (18.2°C). A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a moderately hot 78.6°F (25.9°C) to a pleasant 72.3°F (22.4°C). Weather in September »Weather in October
October, the same as September, is another enjoyable autumn month in Smithtown, New York, with an average temperature fluctuating between 62.2°F (16.8°C) and 54.7°F (12.6°C). October brings a drop in Smithtown's average high-temperature, falling from an agreeable 72.3°F (22.4°C) in September to a refreshing 62.2°F (16.8°C). Weather in October »Weather in November
The last month of the autumn, November, is also a fresh month in Smithtown, New York, with an average temperature varying between 43.7°F (6.5°C) and 51.4°F (10.8°C). Smithtown's average high-temperature decreases in November, falling from a refreshing 62.2°F (16.8°C) in October to a fresh 51.4°F (10.8°C). Weather in November »Weather in December
The first month of the winter, December, is still a chilly month in Smithtown, New York, with an average temperature varying between 43.3°F (6.3°C) and 36°F (2.2°C). Transition into December subtly marks a drop in the average high-temperature, moderately moving from a fresh 51.4°F (10.8°C) in November to a chilly 43.3°F (6.3°C). Weather in December »Updated: Jul 31, 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
Smithtown's January weather reaches an average high of 37.6°F (3.1°C) and an average low of 28.9°F (-1.7°C), making it the coldest month.
The month with the least rainfall is January, when the rain falls for 7.8 days and typically collects 2.2" (56mm) of precipitation.
Throughout the year, there are 155.9 rainfall days, and 35.94" (913mm) of precipitation is accumulated.
Months with snowfall are January through March, November and December.
Throughout the year, there are 15.4 snowfall days, and 5.71" (145mm) of snow is accumulated.
The months with the lowest UV index are January through March and December, with an average maximum UV index of 2.
February has the least sunshine of the year, with an average of 4.8h of sunshine.
The month with the most snowfall is March, when snow falls for 3.2 days and typically aggregates up to 1.85" (47mm) 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 through October are months without snowfall.
The most humid month is May, with an average relative humidity of 77%.
June has the longest days of the year, 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.
Smithtown's temperature records reveal July as the warmest month, marked by average highs of 79.3°F (26.3°C) and lows of 71.2°F (21.8°C).
The month with the most rainfall is July, when the rain falls for 17.4 days and typically aggregates up to 3.94" (100mm) of precipitation.
The month with the most sunshine is July, with an average of 10.8h of sunshine.
The least humid month is November, with an average relative humidity of 71%.
The month with the shortest days is December, with an average of 9h and 18min of daylight.
Average temperature
Smithtown, NY
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (37.6°F).
The month with the highest average low temperature is August (71.6°F).
The coldest month (with the lowest average low temperature) is January (28.9°F).
Average pressure
Smithtown, NY
- Average pressure in January:
30.05"Hg - Average pressure in February:
30.02"Hg - Average pressure in March:
30.05"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:
30.09"Hg - Average pressure in December:
30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Smithtown, NY
- Average wind speed in January:
12.8mph - Average wind speed in February:
12.3mph - Average wind speed in March:
12.1mph - Average wind speed in April:
11.1mph - Average wind speed in May:
9.3mph - Average wind speed in June:
8.6mph
- Average wind speed in July:
8.3mph - Average wind speed in August:
8.4mph - Average wind speed in September:
9.6mph - Average wind speed in October:
11.5mph - Average wind speed in November:
12.1mph - Average wind speed in December:
12.4mph
The windiest month (with the highest average wind speed) is January (12.8mph).
The calmest month (with the lowest average wind speed) is July (8.3mph).
Average humidity
Smithtown, NY
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is November (71%).
Average rainfall
Smithtown, NY
- Average rainfall in January:
2.2" - Average rainfall in February:
2.32" - Average rainfall in March:
2.76" - Average rainfall in April:
2.99" - Average rainfall in May:
2.99" - Average rainfall in June:
2.95"
- Average rainfall in July:
3.94" - Average rainfall in August:
3.46" - Average rainfall in September:
2.64" - Average rainfall in October:
3.39" - Average rainfall in November:
2.52" - Average rainfall in December:
3.78"
The wettest month (with the highest rainfall) is July (3.94").
The driest month (with the least rainfall) is January (2.2").
Average rainfall days
Smithtown, NY
- Average rainfall days in January:
7.8 days - Average rainfall days in February:
8.7 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
14.3 days - Average rainfall days in May:
16.4 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
17.4 days - Average rainfall days in August:
16.3 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
13.6 days - Average rainfall days in November:
8.8 days - Average rainfall days in December:
12 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is January (7.8 days).
Average snowfall
Smithtown, NY
The month with the highest snowfall is March (1.85").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Smithtown, NY
- Average snowfall days in January:
4.2 days - Average snowfall days in February:
4.8 days - Average snowfall days in March:
3.2 days - Average snowfall days in April:
0.1 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:
0.5 days - Average snowfall days in December:
2.5 days
The month with the highest number of snowfall days is February (4.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Smithtown, NY
- Average daylight in January:
9h and 36min - 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 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 18min
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 18min).
- Average sunshine in January:
5h and 12min - Average sunshine in February:
4h and 48min - Average sunshine in March:
6h and 30min - Average sunshine in April:
8h and 36min - Average sunshine in May:
8h and 54min - Average sunshine in June:
10h and 6min
- Average sunshine in July:
10h and 48min - Average sunshine in August:
10h and 42min - Average sunshine in September:
9h and 6min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 30min - Average sunshine in December:
4h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days
Smithtown, NY
- Average sunshine days in January:
18.5 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
16 days - Average sunshine days in April:
14.3 days - Average sunshine days in May:
12.9 days - Average sunshine days in June:
12.3 days
- Average sunshine days in July:
11.4 days - Average sunshine days in August:
12.3 days - Average sunshine days in September:
14.7 days - Average sunshine days in October:
15.9 days - Average sunshine days in November:
19.4 days - Average sunshine days in December:
17 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (11.4 days).
Average UV index
Smithtown, NY
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
Smithtown, NY
The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility
Smithtown, NY
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).
