Home / Frederick / 27 September 2017
Frederick
United States · 27 September 2017
← 26 September 201728 September 2017 →
Average
25°C
low 19.3° · high 32.8°
Rainfall
0mm
dry day
Wind
2m/s
daily average
Humidity
67.9%
daily average
Cloud
10%
cover
Pressure
1011hPa
daily average
The temperature ranged from 19.3°C around 05:00 to 32.8°C around 16:00. 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
99th percentile
Low temperature
92th percentile
Rainfall
49th percentile
Wind
36th 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 25°C on this specific day.
Sun & daylight
Sunrise
07:02
Sunset
18:58
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 | 20.8 | 23.1 | 0 | 1 | NE | 86 | 1014 |
| 01:00 | 05:00 | 20.7 | 22.5 | 0 | 1.5 | N | 85 | 1014 |
| 02:00 | 06:00 | 19.4 | 20.8 | 0 | 1.8 | N | 90 | 1014 |
| 03:00 | 07:00 | 19.5 | 20.9 | 0 | 2 | N | 90 | 1013 |
| 04:00 | 08:00 | 19.4 | 20.7 | 0 | 2.1 | N | 91 | 1013 |
| 05:00 | 09:00 | 19.3 | 20.6 | 0 | 2.2 | N | 92 | 1013 |
| 06:00 | 10:00 | 19.3 | 21 | 0 | 1.6 | N | 92 | 1013 |
| 07:00 | 11:00 | 19.4 | 20.8 | 0 | 2.1 | N | 92 | 1013 |
| 08:00 | 12:00 | 20.1 | 21.7 | 0 | 1.9 | N | 90 | 1014 |
| 09:00 | 13:00 | 21.9 | 24.3 | 0 | 1.4 | N | 85 | 1013 |
| 10:00 | 14:00 | 24.4 | 26.9 | 0 | 1.7 | N | 75 | 1013 |
| 11:00 | 15:00 | 27.7 | 28.7 | 0 | 2.1 | N | 53 | 1013 |
| 12:00 | 16:00 | 29.1 | 30.4 | 0 | 2.3 | NNE | 52 | 1012 |
| 13:00 | 17:00 | 30.5 | 31.6 | 0 | 2.4 | NNE | 47 | 1011 |
| 14:00 | 18:00 | 31.5 | 32.4 | 0 | 2.8 | N | 45 | 1010 |
| 15:00 | 19:00 | 32.3 | 33.1 | 0 | 3 | N | 43 | 1009 |
| 16:00 | 20:00 | 32.8 | 33.4 | 0 | 2.8 | N | 40 | 1009 |
| 17:00 | 21:00 | 32.7 | 32.8 | 0 | 2.9 | N | 37 | 1009 |
| 18:00 | 22:00 | 30.6 | 32.7 | 0 | 1.7 | NNE | 51 | 1009 |
| 19:00 | 23:00 | 28.4 | 30.5 | 0 | 1.5 | NE | 56 | 1009 |
| 20:00 | 00:00 | 26.4 | 27.8 | 0 | 1.4 | NNE | 57 | 1009 |
| 21:00 | 01:00 | 25.2 | 26.1 | 0 | 1.6 | N | 58 | 1009 |
| 22:00 | 02:00 | 24.6 | 25.3 | 0 | 1.6 | NNW | 57 | 1009 |
| 23:00 | 03:00 | 23.8 | 24.7 | 0 | 1.9 | NW | 64 | 1009 |
Nearby cities
Need this verified for an official or legal purpose? Request a weather verification report.
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 27 September 2017 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 (2026-07-18). 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 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Frederick, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 18, 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 2026-07-18},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.