Home / Frederick / 28 September 2023
Frederick
United States · 28 September 2023
← 27 September 202329 September 2023 →
Average
15.5°C
low 10.5° · high 21°
Rainfall
0mm
dry day
Wind
2m/s
daily average
Humidity
76.7%
daily average
Cloud
43%
cover
Pressure
1023hPa
daily average
The temperature ranged from 10.5°C around 05:00 to 21°C around 15:00. 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
27th percentile
Low temperature
19th percentile
Rainfall
48th percentile
Wind
39th 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 18.7°C, versus 15.5°C on this specific day.
Sun & daylight
Sunrise
07:03
Sunset
18:57
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 | 12.8 | 11.4 | 0 | 1.6 | ENE | 76 | 1025 |
| 01:00 | 05:00 | 12 | 10.5 | 0 | 1.7 | ENE | 80 | 1024 |
| 02:00 | 06:00 | 11.1 | 9.6 | 0 | 1.6 | ENE | 83 | 1024 |
| 03:00 | 07:00 | 10.8 | 9.3 | 0 | 1.6 | ENE | 86 | 1024 |
| 04:00 | 08:00 | 10.8 | 9.2 | 0 | 1.8 | NE | 86 | 1024 |
| 05:00 | 09:00 | 10.5 | 8.8 | 0 | 1.9 | NE | 89 | 1024 |
| 06:00 | 10:00 | 10.5 | 8.8 | 0 | 1.9 | NNE | 88 | 1024 |
| 07:00 | 11:00 | 10.6 | 8.9 | 0 | 2 | NE | 88 | 1025 |
| 08:00 | 12:00 | 11.1 | 9.6 | 0 | 1.9 | NE | 88 | 1025 |
| 09:00 | 13:00 | 12.8 | 11.8 | 0 | 1.6 | NE | 84 | 1025 |
| 10:00 | 14:00 | 15.1 | 14.2 | 0 | 1.8 | E | 79 | 1025 |
| 11:00 | 15:00 | 17.5 | 16.8 | 0 | 1.7 | E | 68 | 1024 |
| 12:00 | 16:00 | 18.5 | 17.6 | 0 | 1.8 | ESE | 64 | 1024 |
| 13:00 | 17:00 | 19.6 | 18.9 | 0 | 1.6 | E | 59 | 1023 |
| 14:00 | 18:00 | 20.6 | 19.9 | 0 | 1.9 | E | 58 | 1022 |
| 15:00 | 19:00 | 21 | 20.4 | 0 | 2.2 | E | 60 | 1022 |
| 16:00 | 20:00 | 20.9 | 20.3 | 0 | 2.4 | ESE | 63 | 1021 |
| 17:00 | 21:00 | 20.1 | 19.7 | 0 | 2.4 | ESE | 68 | 1021 |
| 18:00 | 22:00 | 19.7 | 20.2 | 0 | 0.8 | ENE | 67 | 1021 |
| 19:00 | 23:00 | 18.2 | 17.9 | 0 | 2.1 | ENE | 75 | 1021 |
| 20:00 | 00:00 | 17.7 | 17.3 | 0 | 2.5 | ENE | 79 | 1021 |
| 21:00 | 01:00 | 17.2 | 16.4 | 0 | 3.1 | E | 83 | 1022 |
| 22:00 | 02:00 | 17.1 | 16.3 | 0 | 3 | E | 83 | 1022 |
| 23:00 | 03:00 | 16.7 | 16.3 | 0.04 | 2.4 | ENE | 84 | 1022 |
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
- Frederick — 39.500°, -77.500°, ERA5 grid cell center, 12.2 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 28 September 2023 specifically — not a monthly average. See the Frederick 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 Frederick, United States (39.50°N, 77.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Frederick, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Frederick, 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 Frederick, 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.