Home / Brookhaven / 17 September 2017
Brookhaven
United States · 17 September 2017
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Average
23.7°C
low 18.7°C · high 29.9°C
Rainfall
0.7mm
dry day
Wind
1.1m/s
daily average
Humidity
79.9%
daily average
Cloud
21%
cover
Pressure
1018hPa
daily average
The temperature ranged from 18.7°C around 06:00 to 29.9°C around 17:00. Rain was recorded across 4 hours, from around 12:00 to 17:00 (0.7mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
58th percentile
Low temperature
37th percentile
Rainfall
71th percentile
Wind
1th 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 23.4°C, versus 23.7°C on this specific day.
Sun & daylight
Sunrise
07:21
Sunset
19:40
Day length
12h 18m
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 | 20.4°C | 23.4°C | 0 | 1 | NE | 97 | 1019 |
| 01:00 | 05:00 | 20.2°C | 23.2°C | 0 | 0.8 | NE | 97 | 1018 |
| 02:00 | 06:00 | 20°C | 22.6°C | 0 | 1 | N | 94 | 1018 |
| 03:00 | 07:00 | 19.9°C | 22.3°C | 0 | 1.1 | N | 93 | 1018 |
| 04:00 | 08:00 | 19.6°C | 21.6°C | 0 | 1.4 | NNE | 93 | 1018 |
| 05:00 | 09:00 | 18.8°C | 20.4°C | 0 | 1.5 | NNE | 93 | 1018 |
| 06:00 | 10:00 | 18.7°C | 20.2°C | 0 | 1.6 | NE | 94 | 1018 |
| 07:00 | 11:00 | 18.8°C | 20.4°C | 0 | 1.7 | NNE | 94 | 1019 |
| 08:00 | 12:00 | 19.3°C | 21.3°C | 0 | 1.2 | NE | 93 | 1020 |
| 09:00 | 13:00 | 20.5°C | 22.8°C | 0 | 1.4 | NE | 91 | 1020 |
| 10:00 | 14:00 | 22.8°C | 25.8°C | 0 | 0.6 | NE | 81 | 1020 |
| 11:00 | 15:00 | 27.5°C | 30°C | 0 | 0.4 | ENE | 57 | 1020 |
| 12:00 | 16:00 | 28°C | 31.1°C | 0.21 | 0.4 | NNW | 60 | 1020 |
| 13:00 | 17:00 | 28.5°C | 31.3°C | 0.04 | 0.6 | NNW | 56 | 1020 |
| 14:00 | 18:00 | 29°C | 32°C | 0.12 | 0.7 | NW | 57 | 1019 |
| 15:00 | 19:00 | 29.2°C | 31.8°C | 0.11 | 1.3 | NW | 57 | 1018 |
| 16:00 | 20:00 | 29.4°C | 31.9°C | 0.04 | 1.6 | NW | 56 | 1017 |
| 17:00 | 21:00 | 29.9°C | 32.5°C | 0.1 | 1.3 | NW | 55 | 1017 |
| 18:00 | 22:00 | 27.4°C | 31.7°C | 0.05 | 1.4 | N | 76 | 1017 |
| 19:00 | 23:00 | 27.2°C | 31.3°C | 0.01 | 1.1 | NNE | 75 | 1016 |
| 20:00 | 00:00 | 25.3°C | 29.2°C | 0 | 1 | N | 81 | 1017 |
| 21:00 | 01:00 | 24.4°C | 28.1°C | 0 | 0.8 | NW | 83 | 1017 |
| 22:00 | 02:00 | 23.3°C | 26.9°C | 0 | 0.9 | WNW | 87 | 1017 |
| 23:00 | 03:00 | 21.2°C | 24°C | 0 | 1.8 | NW | 97 | 1018 |
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
- Brookhaven — 33.750°, -84.250°, ERA5 grid cell center, 14.7 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 17 September 2017 specifically — not a monthly average. See the Brookhaven 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 (2026-07-20). Historical climate data for Brookhaven, United States (33.75°N, 84.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Brookhaven, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Brookhaven, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 20, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Brookhaven, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-20},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.