Contents
- Weather in July
- Frequently asked questions
- Average temperature in July
- Average pressure in July
- Average wind speed in July
- Average humidity in July
- Average rainfall in July
- Average rainfall days in July
- Average snowfall in July
- Average snowfall days in July
- Average daylight in July
- Average sunshine in July
- Average sunshine days in July
- Average UV index in July
- Average cloud cover in July
- Average visibility in July
Weather in July
Temperature
The arrival of July signals a slight increase in the average high-temperature, moving from an agreeable 70.7°F (21.5°C) in June to a warm 77.9°F (25.5°C). Throughout July, Holtsville records a steady low-temperature average of 71.6°F (22°C), a minor decrease from its daytime counterpart.Humidity
In July, the average relative humidity in Holtsville is 76%.Rainfall
In Holtsville, New York, in July, it is raining for 17.7 days, with typically 3.62" (92mm) of accumulated precipitation. Throughout the year, in Holtsville, there are 155.3 rainfall days, and 34.84" (885mm) of precipitation is accumulated.Snowfall
In Holtsville, snow does not fall in April, June through September and November.Daylight
The average length of the day in July is 14h and 46min.On the first day of July in Holtsville, sunrise is at 5:24 am and sunset at 8:27 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:08 pm EDT.
Sunshine
With an average of 10.8h of sunshine, July has the most sunshine of the year in Holtsville.UV index
June through August, with an average maximum UV index of 6, are months with the highest UV index in Holtsville, New York. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index of 6 during July leads to these instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
What are July temperatures in Holtsville?
What is the average humidity in July in Holtsville?
How much does it rain in Holtsville in July?
When it does not snow in Holtsville?
What is the average length of the day in July in Holtsville?
When is the sunrise / sunset in July in Holtsville?
What month has the most sunshine in Holtsville?
How long on average sun shines in July in Holtsville?
What is the month with the highest UV index in Holtsville?
What is the UV index intensity in July in Holtsville?
Average temperature in July
Holtsville, NY
- Average high temperature in July: 77.9°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 July: 71.6°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 July
Holtsville, NY
- Average pressure in July: 29.96"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 July
Holtsville, NY
- Average wind speed in July: 9mph
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 July
Holtsville, NY
- Average humidity in July: 76%
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 July
Holtsville, NY
- Average rainfall in July: 3.62"
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 July
Holtsville, NY
- Average rainfall days in July: 17.7 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 July
Holtsville, NY
- Average snowfall in July: 0"
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 July
Holtsville, NY
- Average snowfall days in July: 0 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 July /
Average sunshine in July
Holtsville, NY
- Average daylight in July: 14h and 5min
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 July: 10h 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 in July
Holtsville, NY
- Average sunshine days in July: 11.3 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 July
Holtsville, NY
- Average UV index in July: 6
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 July
Holtsville, NY
- Average cloud cover in July: 28
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 July
Holtsville, NY
- Average visibility in July: 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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