Reston
United States · 8 July 2017
Average
25.7°C
low 21.6° · high 30.7°
Rainfall
5.8mm
rain recorded
Wind
3m/s
daily average
Humidity
64.6%
daily average
Cloud
46%
cover
Pressure
1010hPa
daily average
The temperature ranged from 21.6°C around 06:00 to 30.7°C around 17:00. Rain was recorded across 5 hours, from around 05:00 to 12:00 (5.8mm total).
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
39th percentile
Rainfall
81th percentile
Wind
91th 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 26.5°C, versus 25.7°C on this specific day.
Sun & daylight
Sunrise
05:51
Sunset
20:36
Day length
14h 46m
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 | 23.3 | 25.3 | 0 | 2.3 | W | 82 | 1010 |
| 01:00 | 05:00 | 22.7 | 24.6 | 0 | 2.3 | W | 83 | 1010 |
| 02:00 | 06:00 | 22.7 | 24.7 | 0 | 1.9 | WSW | 80 | 1009 |
| 03:00 | 07:00 | 22.5 | 24.4 | 0 | 1.8 | WSW | 79 | 1009 |
| 04:00 | 08:00 | 22.1 | 23.9 | 0 | 1.7 | W | 79 | 1009 |
| 05:00 | 09:00 | 21.9 | 23.5 | 0.73 | 1.9 | W | 80 | 1009 |
| 06:00 | 10:00 | 21.6 | 23.2 | 2.02 | 1.6 | WNW | 79 | 1009 |
| 07:00 | 11:00 | 21.7 | 23.7 | 2.03 | 1.7 | WNW | 83 | 1010 |
| 08:00 | 12:00 | 22.9 | 25.6 | 0.84 | 1.7 | WNW | 85 | 1010 |
| 09:00 | 13:00 | 24.4 | 27.3 | 0.01 | 2 | WNW | 83 | 1011 |
| 10:00 | 14:00 | 25.6 | 28.1 | 0 | 2.8 | W | 77 | 1011 |
| 11:00 | 15:00 | 27.8 | 28.1 | 0.07 | 3.7 | W | 56 | 1011 |
| 12:00 | 16:00 | 28.5 | 28.9 | 0.1 | 4 | WNW | 56 | 1011 |
| 13:00 | 17:00 | 29.3 | 29.5 | 0.02 | 3.8 | WNW | 52 | 1011 |
| 14:00 | 18:00 | 29.9 | 29.8 | 0 | 3.9 | W | 47 | 1011 |
| 15:00 | 19:00 | 30.5 | 29.8 | 0 | 4.2 | W | 43 | 1010 |
| 16:00 | 20:00 | 30.6 | 29.2 | 0 | 4.5 | WNW | 40 | 1010 |
| 17:00 | 21:00 | 30.7 | 29.3 | 0 | 4 | WNW | 37 | 1010 |
| 18:00 | 22:00 | 29.2 | 29.3 | 0 | 3.4 | WNW | 48 | 1010 |
| 19:00 | 23:00 | 28 | 27.6 | 0 | 4.2 | NW | 52 | 1010 |
| 20:00 | 00:00 | 27 | 26.2 | 0 | 4.3 | NW | 53 | 1012 |
| 21:00 | 01:00 | 25.4 | 24.7 | 0 | 3.4 | NW | 53 | 1013 |
| 22:00 | 02:00 | 24.7 | 24.1 | 0 | 2.9 | NW | 53 | 1013 |
| 23:00 | 03:00 | 23 | 23 | 0 | 3.1 | NW | 67 | 1014 |
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
- Reston — 39.000°, -77.250°, ERA5 grid cell center, 8.6 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 8 July 2017 specifically — not a monthly average. See the Reston 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 Reston, United States (39.00°N, 77.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Reston, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Reston, 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 Reston, 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.