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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, is a wintry winter month in Holtsville, New York, with an average temperature varying between 30.2°F (-1°C) and 37.9°F (3.3°C). In Holtsville, the month of January is known for its lowest average temperatures, reaching a high of 37.9°F (3.3°C) and a low of 30.2°F (-1°C). Weather in January »
Weather in February
February, the last month of the winter in Holtsville, is also an icy month, with an average temperature ranging between max 39.7°F (4.3°C) and min 31.3°F (-0.4°C). Holtsville commences February with an average high-temperature of a still icy 39.7°F (4.3°C), maintaining a close resemblance to the previous month. Weather in February »
Weather in March
March, the first month of the spring in Holtsville, is a frosty month, with an average temperature varying between 44.2°F (6.8°C) and 36.3°F (2.4°C). As Holtsville transitions from February to March, the average high-temperatures adjust to a chilly 44.2°F (6.8°C), nearly the same as the previous 39.7°F (4.3°C). Weather in March »
Weather in April
April in Holtsville, New York, is a fresh spring month, with temperature in the range of an average low of 45.1°F (7.3°C) and an average high of 52.3°F (11.3°C). April brings a slight elevation in the average high-temperature, transitioning from March's chilly 44.2°F (6.8°C) to a cool 52.3°F (11.3°C). Weather in April »
Weather in May
May, the last month of the spring in Holtsville, is an enjoyable month, with an average temperature ranging between max 61.2°F (16.2°C) and min 54.3°F (12.4°C). The arrival of May signals a slight increase in the average high-temperature, moving from a fresh 52.3°F (11.3°C) in April to a refreshing 61.2°F (16.2°C). Weather in May »
Weather in June
The first month of the summer, June, is a pleasant month in Holtsville, New York, with an average temperature varying between 70.7°F (21.5°C) and 63.5°F (17.5°C). In June, the meteorological conditions change with the average high-temperature moving from a comfortable 61.2°F (16.2°C) in May to a pleasant 70.7°F (21.5°C). Weather in June »
Weather in July
July is a moderately hot summer month in Holtsville, New York, with temperature in the range of an average high of 77.9°F (25.5°C) and an average low of 71.6°F (22°C). July introduces a marginal temperature uplift, with average high-temperatures adjusting from June's pleasant 70.7°F (21.5°C) to a moderately hot 77.9°F (25.5°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Holtsville, New York, with an average temperature fluctuating between 78.1°F (25.6°C) and 71.8°F (22.1°C). August registers as the month with the highest average temperatures, reaching 78.1°F (25.6°C) at its peak and 71.8°F (22.1°C) at the lowest. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Holtsville, New York, with an average temperature ranging between min 65.3°F (18.5°C) and max 72.1°F (22.3°C). September witnesses a gentle descent in average high-temperature, descending from August's warm 78.1°F (25.6°C) to an agreeable 72.1°F (22.3°C). Weather in September »
Weather in October
October, like September, in Holtsville, New York, is another enjoyable autumn month, with an average temperature ranging between min 55.8°F (13.2°C) and max 62.4°F (16.9°C). Holtsville's October weather shows a moderate shift in high-temperatures, falling from September's pleasant 72.1°F (22.3°C) to a comfortable 62.4°F (16.9°C). Weather in October »
Weather in November
November, the last month of the autumn in Holtsville, is another cool month, with an average temperature fluctuating between 52.3°F (11.3°C) and 45°F (7.2°C). Holtsville's weather changes with the onset of November, slightly falling from a comfortable 62.4°F (16.9°C) in October to a fresh 52.3°F (11.3°C). Weather in November »
Weather in December
December, the first month of the winter in Holtsville, is also a frosty month, with an average temperature varying between 37.2°F (2.9°C) and 44.1°F (6.7°C). A mild shift in the average high-temperature occurs in December, reducing from a fresh 52.3°F (11.3°C) in November to a frosty 44.1°F (6.7°C). Weather in December »
Updated: Aug 19, 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
What is the coldest time of year?
January, with its average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 30.2°F (-1°C), holds the record as the coldest month in Holtsville.
What is the driest month?
The month with the least rainfall is January, when the rain falls for 8.3 days and typically collects 2.17" (55mm) of precipitation.
How much does it rain?
In Holtsville, during the entire year, the rain falls for 155.3 days and collects up to 34.84" (885mm) of precipitation.
When does it snow?
January through March, May, October and December are months with snowfall.
How many days does it snow?
Throughout the year, there are 14.7 snowfall days, and 6.14" (156mm) of snow is accumulated.
What is the month with the lowest UV index in Holtsville?
January through March and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the month with the least sunshine?
February has the least sunshine of the year, with an average of 4.8h of sunshine.
What is the snowiest month?
March is the month with the most snowfall. Snow falls for 2.5 days and accumulates 2.13" (54mm) of snow.
When is Daylight Saving Time (DST)?
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.
When it does not snow?
In Holtsville, snow does not fall in April, June through September and November.
What are the most humid months?
The months with the highest humidity are May and June, with an average relative humidity of 78%.
When are the longest days?
The month with the longest days is June, with an average of 15h and 6min of daylight.
What is the month with the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What month has the most sunshine?
With an average of 10.8h of sunshine, July has the most sunshine of the year.
What part of the year is the hottest?
With average high and low temperatures of 78.1°F (25.6°C) and 71.8°F (22.1°C) respectively, August is Holtsville's warmest month.
What is the least humid month?
The least humid month in Holtsville is November, with an average relative humidity of 71%.
What is the wettest month?
The month with the most rainfall is December, when the rain falls for 12.3 days and typically aggregates up to 3.74" (95mm) of precipitation.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 9h and 18min of daylight.
Average temperature
Holtsville, NY
The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is January (37.9°F).
The month with the highest average low temperature is August (71.8°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).
Average pressure
Holtsville, NY
- Average pressure in January:
30.04"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:
29.96"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:
30.09"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
Holtsville, NY
- Average wind speed in January:
13.8mph - Average wind speed in February:
13.3mph - Average wind speed in March:
12.9mph - Average wind speed in April:
11.9mph - Average wind speed in May:
10.1mph - Average wind speed in June:
9.3mph
- Average wind speed in July:
9mph - Average wind speed in August:
9mph - Average wind speed in September:
10.4mph - Average wind speed in October:
12.4mph - Average wind speed in November:
13mph - Average wind speed in December:
13.4mph
The windiest month (with the highest average wind speed) is January (13.8mph).
The calmest months (with the lowest average wind speed) are July and August (9mph).
Average humidity
Holtsville, NY
The months with the highest relative humidity are May and June (78%).
The month with the lowest relative humidity is November (71%).
Average rainfall
Holtsville, NY
- Average rainfall in January:
2.17" - Average rainfall in February:
2.32" - Average rainfall in March:
2.76" - Average rainfall in April:
2.95" - Average rainfall in May:
2.91" - Average rainfall in June:
2.8"
- Average rainfall in July:
3.62" - Average rainfall in August:
3.27" - Average rainfall in September:
2.48" - Average rainfall in October:
3.39" - Average rainfall in November:
2.44" - Average rainfall in December:
3.74"
The wettest month (with the highest rainfall) is December (3.74").
The driest month (with the least rainfall) is January (2.17").
Average rainfall days
Holtsville, NY
- Average rainfall days in January:
8.3 days - Average rainfall days in February:
9.2 days - Average rainfall days in March:
10.9 days - Average rainfall days in April:
14.1 days - Average rainfall days in May:
16.1 days - Average rainfall days in June:
14.8 days
- Average rainfall days in July:
17.7 days - Average rainfall days in August:
15.7 days - Average rainfall days in September:
12.8 days - Average rainfall days in October:
14 days - Average rainfall days in November:
9.4 days - Average rainfall days in December:
12.3 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (8.3 days).
Average snowfall
Holtsville, NY
The month with the highest snowfall is March (2.13").
The months with the least snowfall are April, June, July, August, September and November (0").
Average snowfall days
Holtsville, NY
- Average snowfall days in January:
4.3 days - Average snowfall days in February:
4.6 days - Average snowfall days in March:
2.5 days - Average snowfall days in April:
0.2 days - Average snowfall days in May:
0.1 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:
0.1 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
2.4 days
The month with the highest number of snowfall days is February (4.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Holtsville, NY
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
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 1min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 4min - Average sunshine in May:
8h and 5min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 5min - Average sunshine in August:
10h and 4min - Average sunshine in September:
9h and 1min - Average sunshine in October:
6h and 0min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
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
Holtsville, NY
- Average sunshine days in January:
18.4 days - Average sunshine days in February:
14.6 days - Average sunshine days in March:
16.3 days - Average sunshine days in April:
14.5 days - Average sunshine days in May:
13.5 days - Average sunshine days in June:
12.8 days
- Average sunshine days in July:
11.3 days - Average sunshine days in August:
12.3 days - Average sunshine days in September:
15.1 days - Average sunshine days in October:
15.8 days - Average sunshine days in November:
18.8 days - Average sunshine days in December:
16.9 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is July (11.3 days).
Average UV index
Holtsville, 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
Holtsville, NY
The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility
Holtsville, 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).
Holtsville, New York, USA
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