Home / Central Islip / 28 September 2018
Central Islip
United States · 28 September 2018
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Average
17.5°C
low 16°C · high 19.4°C
Rainfall
33.6mm
rain recorded
Wind
5.6m/s
daily average
Humidity
84.6%
daily average
Cloud
88%
cover
Pressure
1017hPa
daily average
The temperature ranged from 16°C around 11:00 to 19.4°C around 07:00. Rain was recorded across 12 hours, from around 00:00 to 13:00 (33.6mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
38th percentile
Low temperature
38th percentile
Rainfall
98th percentile
Wind
74th 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 17.5°C on this specific day.
Sun & daylight
Sunrise
06:46
Sunset
18:40
Day length
11h 54m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/New_York.
Cumulative rainfall through the day.
| Local time | UTC | Temp | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 04:00 | 18.5°C | 15.1°C | 0.19 | 7 | E | 79 | 1019 |
| 01:00 | 05:00 | 18.1°C | 15°C | 0.85 | 6.7 | ESE | 82 | 1018 |
| 02:00 | 06:00 | 18.3°C | 15.6°C | 0.81 | 6.4 | ESE | 82 | 1017 |
| 03:00 | 07:00 | 18.5°C | 15.6°C | 0.56 | 6.8 | ESE | 84 | 1016 |
| 04:00 | 08:00 | 18.4°C | 15.4°C | 1.83 | 7.3 | ESE | 88 | 1015 |
| 05:00 | 09:00 | 18.7°C | 15.9°C | 2.32 | 7.4 | ESE | 90 | 1014 |
| 06:00 | 10:00 | 19°C | 17.1°C | 4.33 | 6.3 | E | 91 | 1014 |
| 07:00 | 11:00 | 19.4°C | 18.5°C | 7.44 | 5.5 | ENE | 93 | 1014 |
| 08:00 | 12:00 | 19°C | 17.5°C | 9.1 | 6.3 | NE | 94 | 1015 |
| 09:00 | 13:00 | 17.4°C | 14.1°C | 5.36 | 7.7 | NE | 94 | 1015 |
| 10:00 | 14:00 | 16.1°C | 11.8°C | 0.47 | 8.1 | NNE | 91 | 1015 |
| 11:00 | 15:00 | 16°C | 11.4°C | 0.01 | 8.3 | NNE | 87 | 1016 |
| 12:00 | 16:00 | 16.4°C | 11.9°C | 0.06 | 8.1 | NNE | 85 | 1016 |
| 13:00 | 17:00 | 16.5°C | 12.5°C | 0.16 | 7.5 | NNE | 84 | 1017 |
| 14:00 | 18:00 | 16.7°C | 13.1°C | 0.06 | 6.8 | N | 84 | 1017 |
| 15:00 | 19:00 | 16.8°C | 14.1°C | 0.05 | 5.7 | N | 83 | 1017 |
| 16:00 | 20:00 | 16.9°C | 14.9°C | 0 | 4.6 | N | 82 | 1017 |
| 17:00 | 21:00 | 17°C | 15.5°C | 0 | 3.9 | N | 81 | 1018 |
| 18:00 | 22:00 | 16.8°C | 15.5°C | 0 | 3.5 | NNW | 82 | 1019 |
| 19:00 | 23:00 | 16.8°C | 15.4°C | 0 | 3.4 | NNW | 80 | 1019 |
| 20:00 | 00:00 | 16.8°C | 15.4°C | 0 | 3.3 | NW | 80 | 1019 |
| 21:00 | 01:00 | 16.9°C | 16.3°C | 0 | 2.2 | NW | 78 | 1020 |
| 22:00 | 02:00 | 16.9°C | 17.3°C | 0 | 0.9 | NW | 78 | 1020 |
| 23:00 | 03:00 | 17.2°C | 17.4°C | 0 | 1.1 | W | 78 | 1020 |
Nearby cities
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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
- 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 28 September 2018 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 (2026-07-21). 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 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Central Islip, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 21, 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 2026-07-21},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.