What is the weather in Holtsville right now?

Current weather in Holtsville is overcast clouds.

Where can I find the hourly weather forecast for Holtsville?

This page shows hourly weather forecast for Holtsville, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Holtsville updated regularly?

Weather data for Holtsville is updated regularly with the latest available observations and forecasts.

Now · 6:58 AM

Holtsville Weather & Hourly Forecast

United States · New York · 11742

58°F

Overcast

Feels like: 50°F

💧 Humidity 73% 🌡 Pressure 30.39 inHg 💨 Wind 13 mph 👁 Visibility 22.9 mi ☁ Clouds 100% ☀️ UV index 0.0 · Low 🌅 Sunrise 6:39 AM 🌇 Sunset 6:49 PM

Hourly Forecast for Holtsville

Today

7:00 AM

Overcast

58° 💧 0.000 in 💨 13 mph H 73%30.39 inHg

10:00 AM

Overcast

62° 💧 0.001 in 💨 15 mph H 67%30.42 inHg

1:00 PM

Overcast

65° 💧 None 💨 16 mph H 55%30.42 inHg

4:00 PM

Mostly cloudy

65° 💧 None 💨 16 mph H 46%30.39 inHg

7:00 PM

Mostly clear night

60° 💧 None 💨 13 mph H 61%30.42 inHg

10:00 PM

Partly cloudy night

56° 💧 None 💨 13 mph H 72%30.42 inHg

Tomorrow

1:00 AM

Overcast night

56° 💧 None 💨 12 mph H 72%30.39 inHg

4:00 AM

Overcast night

56° 💧 None 💨 12 mph H 76%30.36 inHg

7:00 AM

Mostly sunny

55° 💧 None 💨 12 mph H 78%30.36 inHg

10:00 AM

Mostly cloudy

60° 💧 0.001 in 💨 17 mph H 63%30.36 inHg

1:00 PM

Mostly cloudy

63° 💧 None 💨 14 mph H 54%30.33 inHg

4:00 PM

Overcast

66° 💧 None 💨 12 mph H 48%30.27 inHg

7:00 PM

Overcast night

61° 💧 None 💨 11 mph H 54%30.24 inHg

10:00 PM

Mostly cloudy night

57° 💧 None 💨 11 mph H 53%30.24 inHg

Friday

1:00 AM

Overcast night

56° 💧 None 💨 11 mph H 64%30.18 inHg

4:00 AM

Overcast night

56° 💧 None 💨 12 mph H 71%30.15 inHg

Today

7:00 AM

Overcast

58° 💧 None 💨 13 mph H 73%30.39 inHg

8:00 AM

Overcast

58° 💧 None 💨 13 mph H 74%30.42 inHg

9:00 AM

Overcast

60° 💧 0.000 in 💨 13 mph H 73%30.42 inHg

10:00 AM

Overcast

62° 💧 0.001 in 💨 15 mph H 67%30.42 inHg

11:00 AM

Overcast

63° 💧 None 💨 17 mph H 59%30.42 inHg

12:00 PM

Overcast

64° 💧 None 💨 18 mph H 56%30.42 inHg

1:00 PM

Overcast

65° 💧 None 💨 16 mph H 55%30.42 inHg

2:00 PM

Overcast

65° 💧 None 💨 15 mph H 52%30.42 inHg

3:00 PM

Partly cloudy

66° 💧 None 💨 15 mph H 47%30.39 inHg

4:00 PM

Mostly cloudy

65° 💧 None 💨 16 mph H 46%30.39 inHg

5:00 PM

Sunny

64° 💧 None 💨 15 mph H 51%30.39 inHg

6:00 PM

Sunny

62° 💧 None 💨 14 mph H 56%30.39 inHg

7:00 PM

Mostly clear night

60° 💧 None 💨 13 mph H 61%30.42 inHg

8:00 PM

Clear night

58° 💧 None 💨 13 mph H 64%30.42 inHg

9:00 PM

Mostly clear night

57° 💧 None 💨 14 mph H 67%30.42 inHg

10:00 PM

Partly cloudy night

56° 💧 None 💨 13 mph H 72%30.42 inHg

11:00 PM

Mostly clear night

56° 💧 None 💨 12 mph H 72%30.42 inHg

Tomorrow

12:00 AM

Mostly cloudy night

55° 💧 None 💨 11 mph H 72%30.42 inHg

1:00 AM

Overcast night

56° 💧 None 💨 12 mph H 72%30.39 inHg

2:00 AM

Overcast night

56° 💧 None 💨 12 mph H 73%30.39 inHg

3:00 AM

Overcast night

56° 💧 None 💨 12 mph H 74%30.36 inHg

4:00 AM

Overcast night

56° 💧 None 💨 12 mph H 76%30.36 inHg

5:00 AM

Overcast night

55° 💧 None 💨 12 mph H 77%30.36 inHg

6:00 AM

Mostly cloudy night

55° 💧 None 💨 12 mph H 78%30.36 inHg

7:00 AM

Mostly sunny

55° 💧 None 💨 12 mph H 78%30.36 inHg

8:00 AM

Mostly sunny

56° 💧 None 💨 13 mph H 76%30.36 inHg

9:00 AM

Mostly sunny

58° 💧 None 💨 15 mph H 72%30.36 inHg

10:00 AM

Mostly cloudy

60° 💧 0.001 in 💨 17 mph H 63%30.36 inHg

11:00 AM

Overcast

61° 💧 0.001 in 💨 15 mph H 62%30.36 inHg

12:00 PM

Overcast

61° 💧 None 💨 14 mph H 60%30.33 inHg

1:00 PM

Mostly cloudy

63° 💧 None 💨 14 mph H 54%30.33 inHg

2:00 PM

Mostly cloudy

65° 💧 None 💨 13 mph H 49%30.30 inHg

3:00 PM

Overcast

66° 💧 None 💨 12 mph H 48%30.27 inHg

4:00 PM

Overcast

66° 💧 None 💨 12 mph H 48%30.27 inHg

5:00 PM

Overcast

65° 💧 None 💨 12 mph H 51%30.24 inHg

6:00 PM

Overcast

63° 💧 None 💨 11 mph H 55%30.24 inHg

7:00 PM

Overcast night

61° 💧 None 💨 11 mph H 54%30.24 inHg

8:00 PM

Mostly cloudy night

60° 💧 None 💨 12 mph H 52%30.24 inHg

9:00 PM

Overcast night

58° 💧 None 💨 12 mph H 52%30.24 inHg

10:00 PM

Mostly cloudy night

57° 💧 None 💨 11 mph H 53%30.24 inHg

11:00 PM

Mostly cloudy night

57° 💧 None 💨 12 mph H 55%30.21 inHg

Friday

12:00 AM

Overcast night

56° 💧 None 💨 12 mph H 61%30.21 inHg

1:00 AM

Overcast night

56° 💧 None 💨 11 mph H 64%30.18 inHg

2:00 AM

Mostly cloudy night

56° 💧 None 💨 12 mph H 67%30.18 inHg

3:00 AM

Mostly cloudy night

56° 💧 None 💨 12 mph H 70%30.15 inHg

4:00 AM

Overcast night

56° 💧 None 💨 12 mph H 71%30.15 inHg

5:00 AM

Mostly cloudy night

56° 💧 None 💨 12 mph H 71%30.15 inHg

6:00 AM

Overcast night

56° 💧 None 💨 11 mph H 70%30.15 inHg

7:00 AM

Partly cloudy

56° 💧 None 💨 11 mph H 68%30.15 inHg

8:00 AM

Mostly cloudy

58° 💧 None 💨 11 mph H 66%30.15 inHg

9:00 AM

Overcast

60° 💧 None 💨 12 mph H 65%30.15 inHg

10:00 AM

Overcast

61° 💧 None 💨 12 mph H 61%30.15 inHg

11:00 AM

Mostly cloudy

64° 💧 None 💨 13 mph H 57%30.15 inHg

12:00 PM

Partly cloudy

66° 💧 None 💨 12 mph H 53%30.15 inHg

1:00 PM

Mostly cloudy

68° 💧 None 💨 12 mph H 48%30.12 inHg

2:00 PM

Mostly cloudy

70° 💧 None 💨 12 mph H 46%30.12 inHg

3:00 PM

Overcast

71° 💧 None 💨 13 mph H 43%30.09 inHg

4:00 PM

Overcast

70° 💧 None 💨 12 mph H 45%30.09 inHg

5:00 PM

Overcast

70° 💧 None 💨 11 mph H 46%30.09 inHg

6:00 PM

Overcast

68° 💧 None 💨 10 mph H 48%30.09 inHg

7:00 PM

Overcast night

66° 💧 None 💨 9 mph H 51%30.09 inHg

8:00 PM

Overcast night

65° 💧 None 💨 10 mph H 50%30.12 inHg

11:00 PM

Overcast night

63° 💧 None 💨 12 mph H 54%30.09 inHg

Saturday

2:00 AM

Overcast night

62° 💧 None 💨 10 mph H 68%30.06 inHg

5:00 AM

Overcast night

62° 💧 None 💨 12 mph H 69%30.03 inHg

8:00 AM

Overcast

62° 💧 None 💨 14 mph H 65%30.03 inHg

11:00 AM

Overcast

64° 💧 None 💨 17 mph H 57%30.03 inHg

2:00 PM

Overcast

64° 💧 None 💨 17 mph H 57%30.00 inHg

5:00 PM

Light rain

64° 💧 None 💨 15 mph H 56%30.00 inHg

8:00 PM

Moderate rain

62° 💧 None 💨 11 mph H 69%29.97 inHg

11:00 PM

Overcast night

62° 💧 None 💨 13 mph H 71%29.91 inHg

Sunday

2:00 AM

Moderate rain

59° 💧 None 💨 15 mph H 88%29.85 inHg

5:00 AM

Moderate rain

59° 💧 None 💨 17 mph H 90%29.80 inHg

8:00 AM

Moderate rain

57° 💧 None 💨 17 mph H 88%29.77 inHg

11:00 AM

Moderate rain

58° 💧 None 💨 20 mph H 83%29.74 inHg

2:00 PM

Light rain

59° 💧 None 💨 18 mph H 80%29.71 inHg

5:00 PM

Light rain

59° 💧 None 💨 16 mph H 84%29.71 inHg

8:00 PM

Light rain

58° 💧 None 💨 16 mph H 85%29.74 inHg

11:00 PM

Overcast night

57° 💧 None 💨 15 mph H 86%29.71 inHg

Monday

2:00 AM

Overcast night

57° 💧 None 💨 13 mph H 85%29.71 inHg

5:00 AM

Light rain

58° 💧 None 💨 10 mph H 87%29.74 inHg

8:00 AM

Overcast

58° 💧 None 💨 9 mph H 87%29.80 inHg

11:00 AM

Light rain

60° 💧 None 💨 8 mph H 82%29.83 inHg

2:00 PM

Overcast

64° 💧 None 💨 7 mph H 72%29.83 inHg

5:00 PM

Overcast

67° 💧 None 💨 5 mph H 70%29.83 inHg

8:00 PM

Overcast night

65° 💧 None 💨 4 mph H 78%29.88 inHg

Tuesday

2:00 AM

Overcast night

63° 💧 None 💨 3 mph H 88%29.91 inHg

8:00 AM

Sunny

60° 💧 None 💨 6 mph H 87%29.97 inHg

2:00 PM

Overcast

65° 💧 None 💨 7 mph H 79%29.97 inHg

8:00 PM

Clear night

64° 💧 None 💨 4 mph H 89%30.00 inHg

Wednesday

2:00 AM

Clear night

62° 💧 None 💨 5 mph H 90%30.06 inHg

8:00 AM

Mostly sunny

61° 💧 None 💨 2 mph H 97%30.09 inHg

2:00 PM

Sunny

66° 💧 None 💨 7 mph H 88%30.09 inHg

8:00 PM

Mostly clear night

66° 💧 None 💨 9 mph H 84%30.09 inHg

Thursday

2:00 AM

Clear night

67° 💧 None 💨 11 mph H 92%30.06 inHg

8:00 AM

Sunny

67° 💧 None 💨 11 mph H 95%30.09 inHg

2:00 PM

Sunny

69° 💧 None 💨 13 mph H 84%30.03 inHg

8:00 PM

Mostly cloudy night

69° 💧 None 💨 17 mph H 83%29.97 inHg

Friday

2:00 AM

Overcast night

70° 💧 None 💨 18 mph H 86%29.91 inHg

8:00 AM

Very heavy rain

67° 💧 None 💨 17 mph H 96%29.85 inHg

2:00 PM

Light rain

68° 💧 None 💨 18 mph H 95%29.80 inHg

8:00 PM

Mostly clear night

67° 💧 None 💨 6 mph H 98%29.77 inHg

Saturday

2:00 AM

Clear night

64° 💧 None 💨 11 mph H 80%29.80 inHg

8:00 AM

Sunny

59° 💧 None 💨 10 mph H 79%29.94 inHg

2:00 PM

Sunny

66° 💧 None 💨 8 mph H 58%29.97 inHg

8:00 PM

Clear night

62° 💧 None 💨 10 mph H 62%30.06 inHg

Sunday

2:00 AM

Clear night

56° 💧 None 💨 9 mph H 73%30.18 inHg

8:00 AM

Sunny

54° 💧 None 💨 6 mph H 77%30.27 inHg

2:00 PM

Partly cloudy

60° 💧 None 💨 5 mph H 49%30.24 inHg

8:00 PM

Mostly clear night

59° 💧 None 💨 6 mph H 64%30.24 inHg

Monday

2:00 AM

Partly cloudy night

55° 💧 None 💨 6 mph H 73%30.24 inHg

8:00 AM

Sunny

55° 💧 None 💨 5 mph H 82%30.24 inHg

2:00 PM

Overcast

63° 💧 None 💨 6 mph H 50%30.21 inHg

8:00 PM

Clear night

62° 💧 None 💨 6 mph H 60%30.18 inHg

Tuesday

2:00 AM

Clear night

62° 💧 None 💨 10 mph H 70%30.18 inHg

8:00 AM

Sunny

59° 💧 None 💨 7 mph H 84%30.15 inHg

2:00 PM

Sunny

64° 💧 None 💨 14 mph H 74%30.06 inHg

8:00 PM

Clear night

64° 💧 None 💨 17 mph H 80%29.94 inHg

Wednesday

2:00 AM

Partly cloudy night

65° 💧 None 💨 15 mph H 86%29.83 inHg

8:00 AM

Mostly sunny

65° 💧 None 💨 14 mph H 83%29.74 inHg

2:00 PM

Mostly cloudy

65° 💧 None 💨 8 mph H 85%29.65 inHg

8:00 PM

Clear night

63° 💧 None 💨 8 mph H 58%29.68 inHg

In Holtsville and, more broadly, across the state of New York: This morning, the sky is mostly cloudy with temperatures starting off in the mid-50s. It will remain cool through the day, with highs reaching the upper 50s to low 60s. Conditions are expected to stay dry, so no rain is forecast. Winds will be light from the northeast, generally around 8 mph, with occasional gusts up to 18 mph. In the afternoon, the clouds may persist, but overall, it should stay dry and relatively calm. Temperatures will remain cool, making it a good day to dress in layers if you're heading outside. No significant weather impacts are anticipated, and conditions will be fairly stable throughout the day.

15-Day Weather Outlook for Holtsville

TomorrowTomorrow

Mostly cloudy 66°/55° 💧 None 💨 17 mph

Friday, Sep 25Fri Sep 25

Overcast 71°/56° 💧 0.001 in 💨 13 mph

Saturday, Sep 26Sat Sep 26

Moderate rain 64°/62° 💧 0.129 in 💨 17 mph

Sunday, Sep 27Sun Sep 27

Moderate rain 59°/57° 💧 0.792 in 💨 20 mph

Monday, Sep 28Mon Sep 28

Light rain 67°/57° 💧 0.056 in 💨 13 mph

Tuesday, Sep 29Tue Sep 29

Overcast 65°/60° 💧 0.002 in 💨 7 mph

Wednesday, Sep 30Wed Sep 30

Mostly sunny 66°/61° 💧 None 💨 9 mph

Thursday, Oct 1Thu Oct 1

Mostly cloudy 69°/67° 💧 None 💨 17 mph

Friday, Oct 2Fri Oct 2

Very heavy rain 70°/67° 💧 1.681 in 💨 18 mph

Saturday, Oct 3Sat Oct 3

Sunny 66°/59° 💧 None 💨 11 mph

Sunday, Oct 4Sun Oct 4

Partly cloudy 60°/54° 💧 None 💨 9 mph

Monday, Oct 5Mon Oct 5

Partly cloudy 63°/55° 💧 None 💨 6 mph

Tuesday, Oct 6Tue Oct 6

Sunny 64°/59° 💧 None 💨 17 mph

Wednesday, Oct 7Wed Oct 7

Partly cloudy 65°/63° 💧 0.099 in 💨 15 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Holtsville

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Holtsville

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 7:00 AM

PM2.5 Fine particles Good 2,4µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 12,3µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Fair 63,9µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 1,2µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Holtsville

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 3,8Moderate 🙂Fair

Tomorrow UV 4,9Moderate 🙂Fair

Friday UV 4,7Moderate 😐Moderate

Saturday UV 3,5Moderate 😐Moderate

Sunday UV 5,0Moderate 🙂Fair

Monday UV 6,0High —Unavailable

Tuesday UV 5,0Moderate —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,3 9:00 AMUV 1,0 10:00 AMUV 2,2 11:00 AMUV 2,8 12:00 PMUV 2,4 1:00 PMUV 3,8 2:00 PMUV 2,7 3:00 PMUV 3,0 4:00 PMUV 1,9 5:00 PMUV 0,9 6:00 PMUV 0,2

Today's weather health advice Open today's recommendations.

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Holtsville

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · HOLTSVILLE, NEW YORK

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 8:00 PM–9:00 PM.

85/100Best-hour score

BEST TIME TONIGHT 8:00 PM–9:00 PM Astronomical darkness: 8:19 PM–5:10 AM

☁ Cloud cover 11% Real hourly forecast for the best viewing hour.

☾ Moonlight 92% Waxing Gibbous · Moon about 25° above the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant -13° high at the best hour.

✦ Estimated visible meteors 0–1/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min5%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

ACTIVE NOW

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

NOV 6–NOV 30

LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

DISCOVER WEATHER NEARBY Weather in other cities

Explore current conditions and forecasts for other locations.

Forecast data for Holtsville were last refreshed today at 6:58 AM. The current forecast period extends through 25/09/2026 at 4:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.