Home / Commack / 27 September 2017
Commack
United States · 27 September 2017
← 26 September 201728 September 2017 →
Average
22.4°C
low 20.9° · high 24.2°
Rainfall
1.6mm
rain recorded
Wind
3.4m/s
daily average
Humidity
94.9%
daily average
Cloud
87%
cover
Pressure
1012hPa
daily average
The temperature ranged from 20.9°C around 00:00 to 24.2°C around 16:00. Rain was recorded across 3 hours, from around 15:00 to 17:00 (1.6mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
93th percentile
Low temperature
95th percentile
Rainfall
67th percentile
Wind
27th 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 18.8°C, versus 22.4°C on this specific day.
Sun & daylight
Sunrise
06:45
Sunset
18:41
Day length
11h 56m
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 | 20.9 | 22.7 | 0 | 2.8 | ENE | 96 | 1015 |
| 01:00 | 05:00 | 21.1 | 23.1 | 0.01 | 2.7 | ENE | 96 | 1014 |
| 02:00 | 06:00 | 21.1 | 22.9 | 0.01 | 2.9 | NE | 96 | 1014 |
| 03:00 | 07:00 | 21.1 | 22.8 | 0.01 | 3.2 | NE | 97 | 1014 |
| 04:00 | 08:00 | 21 | 22.5 | 0 | 3.6 | NE | 97 | 1013 |
| 05:00 | 09:00 | 20.9 | 22.3 | 0.02 | 3.7 | NE | 97 | 1013 |
| 06:00 | 10:00 | 21 | 22.4 | 0.03 | 3.5 | ENE | 96 | 1013 |
| 07:00 | 11:00 | 21 | 22.7 | 0.03 | 3 | NE | 96 | 1013 |
| 08:00 | 12:00 | 21.4 | 22.9 | 0.01 | 3.5 | NE | 96 | 1013 |
| 09:00 | 13:00 | 21.7 | 23.1 | 0.01 | 4 | NE | 97 | 1013 |
| 10:00 | 14:00 | 22 | 23.6 | 0.01 | 3.9 | NE | 96 | 1013 |
| 11:00 | 15:00 | 23.1 | 24.8 | 0.02 | 3.8 | NE | 91 | 1013 |
| 12:00 | 16:00 | 23.4 | 25.6 | 0.01 | 3.6 | ENE | 92 | 1012 |
| 13:00 | 17:00 | 23.7 | 25.8 | 0.01 | 3.8 | NE | 91 | 1012 |
| 14:00 | 18:00 | 24 | 26.1 | 0.01 | 4 | NE | 91 | 1011 |
| 15:00 | 19:00 | 24 | 26.1 | 0.2 | 4.2 | ENE | 91 | 1010 |
| 16:00 | 20:00 | 24.2 | 26.2 | 0.74 | 4.4 | E | 91 | 1010 |
| 17:00 | 21:00 | 24.2 | 26.6 | 0.44 | 3.9 | E | 91 | 1009 |
| 18:00 | 22:00 | 23.4 | 27 | 0.02 | 2.1 | ENE | 97 | 1009 |
| 19:00 | 23:00 | 23.1 | 26.4 | 0 | 2.4 | E | 96 | 1009 |
| 20:00 | 00:00 | 22.9 | 25.7 | 0 | 2.8 | ENE | 96 | 1009 |
| 21:00 | 01:00 | 22.7 | 24.9 | 0 | 3.4 | ENE | 96 | 1009 |
| 22:00 | 02:00 | 22.5 | 24.6 | 0 | 3.7 | ENE | 97 | 1009 |
| 23:00 | 03:00 | 22.3 | 24.4 | 0.01 | 3.6 | ENE | 98 | 1008 |
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
- Commack — 40.750°, -73.250°, ERA5 grid cell center, 10.9 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 27 September 2017 specifically — not a monthly average. See the Commack 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 Commack, 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 Commack, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Commack, 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 Commack, 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.