Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average snowfall in October
- Average snowfall days in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
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). During October, Holtsville's nighttime temperatures demonstrate a subtle cooling from daytime highs, stabilizing at a mild 55.8°F (13.2°C).Humidity
In October, the average relative humidity is 73%.Rainfall
In October, the rain falls for 14 days. Throughout October, 3.39" (86mm) of precipitation is accumulated. In Holtsville, during the entire year, the rain falls for 155.3 days and collects up to 34.84" (885mm) of precipitation.Snowfall
January through March, May, October and December are months with snowfall. October is the first month it typically snows. Throughout October, in the average 0.1 snowfall days, it receives 0.2" (5mm) of snow. In Holtsville, during the entire year, snow falls for 14.7 days and aggregates up to 6.14" (156mm) of snow.Daylight
In October, the average length of the day is 11h and 6min.On the first day of October, sunrise is at 6:49 am and sunset at 6:33 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 5:49 pm EDT.
Sunshine
In October, the average sunshine is 6h.UV index
In October, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum daily UV index of 4 during October morphs into the following directions:
Guard yourself - An obligation to protect skin and eyes from harm exists. To guard against the harmful effects of the Sun, minimize exposure during midday. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in October?
What is the average humidity in October?
How much does it rain in October?
When does it start to snow?
How many hours of daylight does Holtsville have in October?
What time are sunrise and sunset in October?
How many hours of sunshine does Holtsville have in October?
What is the UV index reading in October?
Average temperature in October
Holtsville, NY
- Average high temperature in October: 62.4°F
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).
- Average low temperature in October: 55.8°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 in October
Holtsville, NY
- Average pressure in October: 30.01"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 in October
Holtsville, NY
- Average wind speed in October: 12.4mph
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 in October
Holtsville, NY
- Average humidity in October: 73%
The months with the highest relative humidity are May and June (78%).
The month with the lowest relative humidity is November (71%).
Average rainfall in October
Holtsville, NY
- Average rainfall in October: 3.39"
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 in October
Holtsville, NY
- Average rainfall days in October: 14 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 in October
Holtsville, NY
- Average snowfall in October: 0.2"
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 in October
Holtsville, NY
- Average snowfall days in October: 0.1 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 in October /
Average sunshine in October
Holtsville, NY
- Average daylight in October: 11h and 1min
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 October: 6h and 0min
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 in October
Holtsville, NY
- Average sunshine days in October: 15.8 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 in October
Holtsville, NY
- Average UV index in October: 4
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 in October
Holtsville, NY
- Average cloud cover in October: 40
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 in October
Holtsville, NY
- Average visibility in October: 6mi
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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