McLean
United States · 4 July 2023
Average
26.8°C
low 22.2°C · high 31.1°C
Rainfall
0.9mm
dry day
Wind
1.9m/s
daily average
Humidity
73.5%
daily average
Cloud
44%
cover
Pressure
1013hPa
daily average
The temperature ranged from 22.2°C around 05:00 to 31.1°C around 15:00. Rain was recorded across 2 hours, from around 18:00 to 19:00 (0.9mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
37th percentile
Low temperature
50th percentile
Rainfall
55th percentile
Wind
32th 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 26.3°C, versus 26.8°C on this specific day.
Sun & daylight
Sunrise
05:48
Sunset
20:38
Day length
14h 50m
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 | 24.1°C | 27.8°C | 0.01 | 1.2 | S | 87 | 1012 |
| 01:00 | 05:00 | 23.7°C | 27.2°C | 0 | 1.3 | S | 87 | 1013 |
| 02:00 | 06:00 | 23.3°C | 26.6°C | 0 | 1.5 | SSW | 88 | 1012 |
| 03:00 | 07:00 | 23.2°C | 26.2°C | 0 | 1.6 | WSW | 87 | 1012 |
| 04:00 | 08:00 | 22.9°C | 25.5°C | 0 | 1.9 | W | 87 | 1012 |
| 05:00 | 09:00 | 22.2°C | 24.5°C | 0 | 2.1 | WNW | 88 | 1012 |
| 06:00 | 10:00 | 22.8°C | 26.4°C | 0 | 1.3 | SW | 93 | 1013 |
| 07:00 | 11:00 | 23.1°C | 26.3°C | 0 | 2 | WSW | 92 | 1013 |
| 08:00 | 12:00 | 24.2°C | 28°C | 0 | 1.6 | WNW | 89 | 1013 |
| 09:00 | 13:00 | 25.6°C | 28.9°C | 0.04 | 2.1 | WNW | 82 | 1014 |
| 10:00 | 14:00 | 26.9°C | 29.6°C | 0.07 | 2.9 | WNW | 75 | 1014 |
| 11:00 | 15:00 | 28.9°C | 31.8°C | 0.07 | 2.5 | WNW | 66 | 1014 |
| 12:00 | 16:00 | 30°C | 33.1°C | 0.03 | 2.1 | NW | 61 | 1014 |
| 13:00 | 17:00 | 31°C | 34°C | 0.01 | 2 | WNW | 57 | 1014 |
| 14:00 | 18:00 | 31.1°C | 33.8°C | 0 | 2.4 | WNW | 56 | 1014 |
| 15:00 | 19:00 | 31.1°C | 33.8°C | 0.02 | 2.5 | WNW | 56 | 1013 |
| 16:00 | 20:00 | 30.9°C | 33.6°C | 0 | 2.6 | WNW | 58 | 1013 |
| 17:00 | 21:00 | 31.1°C | 33.5°C | 0.01 | 2.5 | WNW | 55 | 1013 |
| 18:00 | 22:00 | 30.6°C | 31.9°C | 0.3 | 3.5 | WNW | 53 | 1013 |
| 19:00 | 23:00 | 28.7°C | 31.2°C | 0.35 | 2.1 | NW | 61 | 1013 |
| 20:00 | 00:00 | 27.8°C | 31.3°C | 0 | 0.9 | NNW | 66 | 1014 |
| 21:00 | 01:00 | 26.9°C | 30.7°C | 0 | 1.2 | WNW | 74 | 1014 |
| 22:00 | 02:00 | 27.1°C | 30.4°C | 0 | 1.3 | W | 70 | 1015 |
| 23:00 | 03:00 | 25.5°C | 28.5°C | 0 | 1.6 | W | 75 | 1015 |
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
- McLean — 39.000°, -77.250°, ERA5 grid cell center, 9.6 km from requested point
- Time zone
- America/New_York
- What's shown here
- The hourly and daily record for 4 July 2023 specifically — not a monthly average. See the McLean 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 McLean, 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 McLean, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for McLean, 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 McLean, 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.