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Home / Holtsville / 29 September 2023

Holtsville

United States · 29 September 2023

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Average

17°C

low 16.5° · high 18.3°

Rainfall

99.4mm

rain recorded

Wind

7.7m/s

daily average

Humidity

92%

daily average

Cloud

100%

cover

Pressure

1021hPa

daily average

The temperature ranged from 16.5°C around 00:00 to 18.3°C around 17:00. Rain was recorded across 24 hours, from around 00:00 to 23:00 (99.4mm total).

How unusual was this day?

Compared against the same 135 calendar days (±7 days) across the other 9 years on file.

High temperature

19th percentile

Low temperature

42th percentile

Rainfall

100th percentile

Wind

91th percentile

A percentile of 100 means this was the hottest/wettest/windiest of the comparable days on file; 50 is right in the middle. This window's average temperature was 18.6°C, versus 17°C on this specific day.

Sun & daylight

Sunrise

06:46

Sunset

18:37

Day length

11h 51m

Hour by hour

Temperature (line) and hourly rainfall (bars), local time — America/New_York.

↓ Download CSV
00:0006:0012:0018:0023:00

Cumulative rainfall through the day.

00:0006:0012:0018:0023:00
Local timeUTCTemp °CFeels °CRain mmWind m/sDirHumidity %Pressure hPa
00:0004:0016.512.42.857.9ENE891023
01:0005:0016.512.72.747.7ENE901023
02:0006:0016.812.92.377.9ENE901023
03:0007:0016.913.11.977.8ENE901022
04:0008:0016.913.12.128ENE911021
05:0009:0016.912.55.768.8ENE921021
06:0010:0016.813.88.366.7ENE911021
07:0011:0016.913.87.566.9NE911021
08:0012:001713.27.368NE921022
09:0013:0016.912.98.138.2NE921022
10:0014:0016.812.89.378.3NE921022
11:0015:001713.18.688.2NE921022
12:0016:001713.57.477.8NE931022
13:0017:0017.113.67.198NE931021
14:0018:0017.313.86.067.8NE941021
15:0019:0017.714.51.397.7ENE931020
16:0020:0018.115.11.027.8ENE931020
17:0021:0018.315.20.687.7ENE921020
18:0022:0017.113.91.477.5NE931019
19:0023:0017.214.12.157.4NE931020
20:0000:0017.214.21.837.1NE931020
21:0001:001714.11.146.8NE931020
22:0002:0016.713.80.656.9NE931020
23:0003:0016.513.21.17.2NE931020

Same date, other years

202520242022202120202019201820172016

Nearby cities

Coram

0km away, same day

Centereach

0km away, same day

Shirley

0km away, same day

Holbrook

0km away, same day

Medford

0km away, same day

East Patchogue

0km away, same day

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Data source & coverage — ERA5 reanalysis, 2016–2025 (10 years)details
Source
ERA5 reanalysis, accessed via the Copernicus Climate Change Service (C3S) Climate Data Store
Data type
Reanalysis — a physically consistent reconstruction combining a forecast model with historical observations, not a live station reading or a forecast
Coverage
2016–2025 (10 years) for United States
Location
Holtsville — 40.750°, -73.000°, ERA5 grid cell center, 8.2 km from requested point
Time zone
America/New_York
What's shown here
The hourly and daily record for 29 September 2023 specifically — not a monthly average. See the Holtsville climate overview for typical conditions.
Spatial resolution
0.25° (~25 km) distributed grid — ERA5's native model resolution is finer; this is the publicly distributed regridded product
Version / refreshed
Methodology v2026.07 · data last refreshed December 31, 2025
Limitations
A model reconstruction, not a station observation — hyper-local extremes (a single storm cell, an urban heat pocket) can differ from a nearby gauge. See the full methodology.
Attribution
Generated using Copernicus Climate Change Service information

Cite this data

Plain text
PastClimate (2026-07-16). Historical climate data for Holtsville, United States (40.75°N, 73.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
APA
PastClimate. (2026). Historical climate data for Holtsville, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 16, 2026, from https://www.pastclimate.com/
MLA
"Historical Climate Data for Holtsville, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 16, 2026, www.pastclimate.com.
BibTeX
@misc{pastclimate,
  author = {PastClimate},
  title = {Historical climate data for Holtsville, United States},
  year = {2026},
  note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-16},
  url = {https://www.pastclimate.com/}
}

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