Home / Central Islip / 29 September 2017
Central Islip
United States · 29 September 2017
← 28 September 201730 September 2017 →
Average
16.9°C
low 14.5° · high 18.8°
Rainfall
0mm
dry day
Wind
3.7m/s
daily average
Humidity
57.7%
daily average
Cloud
33%
cover
Pressure
1016hPa
daily average
The temperature ranged from 14.5°C around 07:00 to 18.8°C around 17:00. No measurable rain was recorded during the day.
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
30th percentile
Low temperature
19th percentile
Rainfall
43th percentile
Wind
30th 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 18.5°C, versus 16.9°C on this specific day.
Sun & daylight
Sunrise
06:47
Sunset
18:37
Day length
11h 50m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/New_York.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 04:00 | 17.8 | 12.9 | 0 | 7.2 | NNW | 62 | 1014 |
| 01:00 | 05:00 | 17.2 | 12.5 | 0 | 6.7 | NNW | 63 | 1014 |
| 02:00 | 06:00 | 16.7 | 12.1 | 0 | 6.5 | NNW | 63 | 1015 |
| 03:00 | 07:00 | 16.1 | 11.6 | 0 | 6.1 | NNW | 63 | 1015 |
| 04:00 | 08:00 | 15.8 | 11.4 | 0 | 5.9 | NNW | 64 | 1015 |
| 05:00 | 09:00 | 15.3 | 11.1 | 0 | 5.6 | N | 64 | 1016 |
| 06:00 | 10:00 | 14.7 | 11.1 | 0 | 4.5 | N | 64 | 1017 |
| 07:00 | 11:00 | 14.5 | 11 | 0 | 4.2 | N | 64 | 1017 |
| 08:00 | 12:00 | 14.6 | 11.7 | 0 | 3.6 | N | 64 | 1017 |
| 09:00 | 13:00 | 15.3 | 13.2 | 0 | 2.7 | N | 66 | 1018 |
| 10:00 | 14:00 | 15.6 | 13.9 | 0 | 2 | NNW | 62 | 1018 |
| 11:00 | 15:00 | 16.3 | 14.5 | 0 | 1.6 | NW | 55 | 1018 |
| 12:00 | 16:00 | 16.6 | 14.5 | 0 | 2 | WNW | 54 | 1018 |
| 13:00 | 17:00 | 17.1 | 14.8 | 0 | 2.4 | W | 52 | 1017 |
| 14:00 | 18:00 | 17.7 | 15 | 0 | 2.9 | W | 51 | 1017 |
| 15:00 | 19:00 | 18.1 | 15.2 | 0 | 3.4 | W | 52 | 1016 |
| 16:00 | 20:00 | 18.5 | 15.7 | 0 | 3.6 | W | 53 | 1016 |
| 17:00 | 21:00 | 18.8 | 15.9 | 0 | 3.8 | W | 52 | 1016 |
| 18:00 | 22:00 | 18.5 | 16.1 | 0 | 3.3 | W | 55 | 1016 |
| 19:00 | 23:00 | 18.4 | 16.1 | 0 | 2.9 | W | 54 | 1017 |
| 20:00 | 00:00 | 18 | 15.8 | 0 | 2.5 | W | 53 | 1017 |
| 21:00 | 01:00 | 17.7 | 16 | 0 | 1.7 | W | 53 | 1017 |
| 22:00 | 02:00 | 17.6 | 16 | 0 | 1.3 | WSW | 50 | 1017 |
| 23:00 | 03:00 | 17.5 | 15.6 | 0 | 1.9 | SW | 53 | 1017 |
Nearby cities
Need this verified for an official or legal purpose? Request a weather verification report.
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
- Central Islip — 40.750°, -73.250°, ERA5 grid cell center, 6.1 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 29 September 2017 specifically — not a monthly average. See the Central Islip 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
PastClimate (2026-07-17). Historical climate data for Central Islip, United States (40.75°N, 73.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Central Islip, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Central Islip, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 17, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Central Islip, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-17},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.