Holtsville weather in March

In March, Holtsville sees average daytime highs of 44°F and overnight lows near 36°F, with 4.4 in of precipitation across 10.2 wet days and about 11.7 hours of daylight. It is the 10th-warmest and 2nd-wettest month of the year here.

Highs climb over the month, from about 42°F in the first days to 47°F by the end. The sky is clear or mostly clear about 31% of the time in March, and the air most often feels dry.

Daylight stretches from about 11 hours at the start of March to 12 h 24 min by month's end. Set against the rest of the year, March is Holtsville's 8th-clearest and 5th-windiest month. For the whole year in context, see Holtsville's year-round climate.

Daytime high
44°
10th warmest
Overnight low
36°
3rd coldest
Precipitation
4.4 in
10.2 wet days
Daylight
11 h 42 min
6:12 AM – 5:52 PM
Cloud cover
60%
8th clearest
Wind
13 mph
5th windiest
Solar energy
4.17 kWh/m²
Travel score
0.8
out of 10

Holtsville is census-designated place in Suffolk County, New York, United States.

Density
1,070/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 42°F in the first days to 47°F by the end.

A typical March day in Holtsville reaches about 44°F in the afternoon and slips back to 36°F overnight — a 8°F spread between the day's warmth and the night's chill. On most days the high lands between 37°F and 52°F. Set against its neighbours, March runs about 5°F warmer than February and about 8°F cooler than April.

20°30°40°50°60°151015202531
Avg high (°F)Avg low (°F)
14133
24233
34233
44233
54233
64233
74234
84234
94334
104334
114334
124335
134335
144335
154435
164435
174436
184436
194436
204537
214537
224537
234537
244638
254638
264638
274639
284739
294739
304740
314740

How March really feels in Holtsville

Once humidity and wind are folded in, March averages 0 days that feel above 90°F and 29 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
29
wind chill below the day's low

The story in March is cold — wind chill drags the overnight "feels like" below the raw low.

Holtsville weather by month

How March compares with the rest of the year at a glance. March is the 10th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan39° / 31°3.79.949.40.0
Feb39° / 30°3.49.33.710.40.0
Mar44° / 36°4.410.22.811.70.8
Apr52° / 44°3.610.50.413.12.7
May61° / 53°3.310.2014.24.9
Jun70° / 64°3.49.6014.96.6
Jul77° / 71°3.28.8014.67.2
Aug76° / 70°3.89.4013.67.2
Sep71° / 65°3.78.9012.36.9
Oct62° / 55°4.38.9010.95.5
Nov53° / 45°3.68.80.39.73.1
Dec45° / 37°4.610.32.39.11.0

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 15% of March, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24456
34456
44555
54555
64555
74555
84555
94555
104654
114654
124753
134753
144753
154753
164753
174852
184753
194654
204654
214654
224654
234654
244654
254654
264654
274654
284654
294654
304555
314456

Chance of precipitation in March

Any precipitationSnow

Holtsville gets around 4.4 in of rain and snow over 10.2 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 33% and peaks near 36% on the wettest days, and about 3 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13512
23512
33412
43412
53311
63311
73211
83211
93210
103110
113110
123110
133110
14319
15319
16319
17319
18319
19319
20328
21328
22338
23337
24347
25357
26356
27356
28365
29365
30364
31364

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

Most of March feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, March lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in March

Winds average 13 mph in March.

Across March, daily wind ranges from about 12 mph on the calmest days to 13 mph at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (mph)Feels
113breezy
213breezy
313breezy
413breezy
513breezy
613breezy
713breezy
813breezy
913breezy
1013breezy
1113breezy
1213breezy
1313breezy
1413breezy
1513breezy
1613breezy
1713breezy
1813breezy
1912breezy
2012breezy
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in March

DaylightNight

Daylight runs from about 11 hours at the start of March to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 84 minutes over March. Sunrise moves from 6:36 AM to 5:46 AM, and sunset from 5:35 PM to 6:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.06:365:35
211.06:345:36
311.16:335:37
411.16:315:38
511.26:305:39
611.26:285:41
711.36:275:42
811.36:255:43
911.36:235:44
1011.46:225:45
1111.46:205:46
1211.56:195:47
1311.56:175:48
1411.66:155:50
1511.66:145:51
1611.76:125:52
1711.76:105:53
1811.86:095:54
1911.86:075:55
2011.86:055:56
2111.96:035:57
2211.96:025:58
2312.06:005:59
2412.05:586:00
2512.15:576:02
2612.15:556:03
2712.25:536:04
2812.25:516:05
2912.35:506:06
3012.35:486:07
3112.45:466:08

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.17 kWh/m².

For context, solar energy here swings from a low near 1.75 kWh/m² to a high of 6.48 kWh/m² in June across the year — March's 4.17 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
13.6Moderate
23.6Moderate
33.7Moderate
43.7Moderate
53.8Moderate
63.8Moderate
73.9Moderate
83.9Moderate
94.0Moderate
104.0Bright
114.0Bright
124.1Bright
134.1Bright
144.2Bright
154.2Bright
164.2Bright
174.3Bright
184.3Bright
194.3Bright
204.4Bright
214.4Bright
224.4Bright
234.4Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.6Bright
294.6Bright
304.6Bright
314.7Bright
Planning a trip in March

Hazard calendar for Holtsville

In seasonPeak

None of Holtsville's seasonal hazards are active in March. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Holtsville sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is March a good time to visit Holtsville?

Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

0.8
Sightseeing
10th-best month of the year
0.0
Beach & pool
9th-best month of the year

March is a weaker month for outdoor sightseeing in Holtsville.

What to pack for Holtsville in March

From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In March, Holtsville sees daytime highs around 44°F and nights near 36°F. Pack a warm layer. Worth having: a heavy coat, rain gear and a windbreaker. About 10 days see rain.

a warm layera heavy coatrain geara windbreaker

Sea temperature near Holtsville in March

The nearest coast averages about 40°F in March — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 14 mi away) is warmest in August at about 73°F and coldest in February near 40°F.

It's comfortable for a long swim from Jul 3 to Sep 23 — about 2.7 months when the water holds above 68°F.

40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan43Bracing
Feb40Bracing
Mar40Bracing
Apr45Bracing
May54Bracing
Jun64Cool
Jul72Refreshing
Aug73Refreshing
Sep70Refreshing
Oct63Cool
Nov55Bracing
Dec49Bracing

UV index in Holtsville in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Holtsville peaks around July 11 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 11UV 8Dec 22UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May7Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Holtsville in March

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where March falls, not just the annual average.

Air quality in Holtsville is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1016 µg/m³Nov 178 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar14Moderate
Apr15Moderate
May16Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep11Good
Oct9Good
Nov8Good
Dec8Good
Location & terrain

Where is Holtsville?

Holtsville sits at 40.8°N, 73.0°W, 105 ft above sea level, in United States. The nearest listed city is Farmingville, 1.2 mi away.

Topography around Holtsville

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Holtsville.

Within 2 miles, the terrain around Holtsville has only modest variations in elevation — a maximum elevation change of 276 ft around an average of 115 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 335 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,079 ft.

The land around Holtsville is covered by trees (64%) and artificial surfaces (20%) within 2 miles, trees (58%) within 10 miles, and water (54%) and trees (35%) within 50 miles.

2 miles
276 ft
10 miles
335 ft
50 miles
1,079 ft
treesgrasslandartificial surfaceswaterwetland
March weather nearby: Farmingville 1.2 mi · Holbrook 1.9 mi · Medford 2.5 mi · Selden 3.7 mi · Centereach 4.3 mi · East Patchogue 4.3 mi · Coram 4.3 mi · Lake Ronkonkoma 5.0 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Holtsville (40.8154°, -73.0451°, elevation 105 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).