Home / Frederick / 29 September 2021
Frederick
United States · 29 September 2021
← 28 September 202130 September 2021 →
Average
17.1°C
low 13.4°C · high 21.6°C
Rainfall
0mm
dry day
Wind
2m/s
daily average
Humidity
65.1%
daily average
Cloud
15%
cover
Pressure
1017hPa
daily average
The temperature ranged from 13.4°C around 08:00 to 21.6°C around 17:00. 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
35th percentile
Low temperature
43th percentile
Rainfall
47th percentile
Wind
40th 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 18.5°C, versus 17.1°C on this specific day.
Sun & daylight
Sunrise
07:04
Sunset
18:55
Day length
11h 51m
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 | 18.3°C | 18.3°C | 0.01 | 2.9 | NNW | 87 | 1014 |
| 01:00 | 05:00 | 17.5°C | 17.2°C | 0 | 2.9 | NNW | 88 | 1014 |
| 02:00 | 06:00 | 16.7°C | 16.2°C | 0 | 2.9 | N | 88 | 1014 |
| 03:00 | 07:00 | 16.5°C | 15.7°C | 0 | 2.9 | N | 84 | 1015 |
| 04:00 | 08:00 | 15.9°C | 14.7°C | 0 | 2.9 | N | 82 | 1015 |
| 05:00 | 09:00 | 14.7°C | 13.2°C | 0 | 2.7 | N | 79 | 1016 |
| 06:00 | 10:00 | 13.9°C | 12.1°C | 0.02 | 2.3 | N | 74 | 1017 |
| 07:00 | 11:00 | 13.4°C | 11.6°C | 0.01 | 2.1 | N | 74 | 1018 |
| 08:00 | 12:00 | 13.4°C | 11.8°C | 0 | 1.9 | N | 75 | 1018 |
| 09:00 | 13:00 | 14.2°C | 12.2°C | 0 | 2.5 | N | 70 | 1019 |
| 10:00 | 14:00 | 15.6°C | 13.8°C | 0 | 2.1 | N | 62 | 1019 |
| 11:00 | 15:00 | 17.7°C | 15.9°C | 0 | 1.8 | N | 52 | 1019 |
| 12:00 | 16:00 | 18.7°C | 17°C | 0 | 1.7 | N | 49 | 1019 |
| 13:00 | 17:00 | 19.8°C | 18.2°C | 0 | 1.6 | NNW | 46 | 1018 |
| 14:00 | 18:00 | 20.5°C | 18.7°C | 0 | 1.8 | NW | 45 | 1017 |
| 15:00 | 19:00 | 21.2°C | 19.3°C | 0 | 2.1 | NW | 43 | 1017 |
| 16:00 | 20:00 | 21.4°C | 19.3°C | 0 | 2.5 | NNW | 43 | 1017 |
| 17:00 | 21:00 | 21.6°C | 19.5°C | 0 | 2.4 | NNW | 42 | 1017 |
| 18:00 | 22:00 | 20°C | 19°C | 0 | 1.3 | N | 50 | 1017 |
| 19:00 | 23:00 | 19°C | 18°C | 0 | 1 | N | 50 | 1017 |
| 20:00 | 00:00 | 17.4°C | 16.9°C | 0 | 0.5 | E | 59 | 1017 |
| 21:00 | 01:00 | 15.5°C | 15.2°C | 0 | 0.5 | SE | 70 | 1018 |
| 22:00 | 02:00 | 14.4°C | 13.7°C | 0 | 1.1 | SSW | 74 | 1018 |
| 23:00 | 03:00 | 14°C | 12.9°C | 0 | 1.6 | SW | 76 | 1019 |
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 29 September 2021 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 (2026-07-20). 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 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Frederick, 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 Frederick, 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.