Home / Commack / 27 September 2020
Commack
United States · 27 September 2020
← 26 September 202028 September 2020 →
Average
20.9°C
low 19.6° · high 22.3°
Rainfall
0.5mm
dry day
Wind
3m/s
daily average
Humidity
91.9%
daily average
Cloud
70%
cover
Pressure
1015hPa
daily average
The temperature ranged from 19.6°C around 06:00 to 22.3°C around 14:00. Rain was recorded for one hour, around 23:00 (0.5mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
70th percentile
Low temperature
84th percentile
Rainfall
61th percentile
Wind
19th 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 19°C, versus 20.9°C on this specific day.
Sun & daylight
Sunrise
06:45
Sunset
18:40
Day length
11h 55m
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 | 20.2 | 21.4 | 0 | 2.9 | SE | 93 | 1017 |
| 01:00 | 05:00 | 20.2 | 21.2 | 0 | 3.2 | SE | 94 | 1016 |
| 02:00 | 06:00 | 20.2 | 21 | 0 | 3.5 | SE | 94 | 1016 |
| 03:00 | 07:00 | 20.1 | 21.3 | 0 | 3.1 | SE | 94 | 1016 |
| 04:00 | 08:00 | 20.1 | 22 | 0 | 2 | SE | 94 | 1016 |
| 05:00 | 09:00 | 19.9 | 22 | 0 | 1.6 | ESE | 94 | 1016 |
| 06:00 | 10:00 | 19.6 | 21.4 | 0 | 2 | ESE | 95 | 1016 |
| 07:00 | 11:00 | 19.7 | 21.4 | 0 | 2.2 | ESE | 95 | 1016 |
| 08:00 | 12:00 | 19.9 | 21.7 | 0 | 2.1 | ESE | 95 | 1016 |
| 09:00 | 13:00 | 20.2 | 22.3 | 0.03 | 1.9 | SE | 95 | 1017 |
| 10:00 | 14:00 | 20.6 | 22.8 | 0.09 | 1.7 | SSE | 92 | 1017 |
| 11:00 | 15:00 | 21.2 | 23 | 0.03 | 2.1 | SSE | 88 | 1017 |
| 12:00 | 16:00 | 21.5 | 23.4 | 0.03 | 2.2 | SSE | 88 | 1016 |
| 13:00 | 17:00 | 22.1 | 23.9 | 0.08 | 2.3 | SSE | 85 | 1016 |
| 14:00 | 18:00 | 22.3 | 24.6 | 0.06 | 1.9 | SSE | 86 | 1015 |
| 15:00 | 19:00 | 22.2 | 24.3 | 0 | 2.3 | SE | 88 | 1015 |
| 16:00 | 20:00 | 22 | 23.5 | 0 | 3.3 | ESE | 90 | 1014 |
| 17:00 | 21:00 | 21.7 | 22.8 | 0 | 3.9 | ESE | 91 | 1014 |
| 18:00 | 22:00 | 21.7 | 22.5 | 0.01 | 4.3 | SE | 93 | 1014 |
| 19:00 | 23:00 | 21.6 | 22.4 | 0 | 4.2 | ESE | 91 | 1014 |
| 20:00 | 00:00 | 21.5 | 22.2 | 0 | 4.4 | ESE | 91 | 1014 |
| 21:00 | 01:00 | 21.5 | 21.9 | 0.01 | 4.7 | SE | 91 | 1014 |
| 22:00 | 02:00 | 21.3 | 21.4 | 0.02 | 5.3 | SE | 93 | 1013 |
| 23:00 | 03:00 | 21.2 | 21.2 | 0.14 | 5.5 | SSE | 94 | 1013 |
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 2020 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.