Home / West Branch / 1 September 2018
West Branch
United States · 1 September 2018
← 31 August 20182 September 2018 →
Average
24.9°C
low 21.3° · high 29.7°
Rainfall
62.7mm
rain recorded
Wind
3.8m/s
daily average
Humidity
81.2%
daily average
Cloud
100%
cover
Pressure
1013hPa
daily average
The temperature ranged from 21.3°C around 09:00 to 29.7°C around 16:00. Rain was recorded across 9 hours, from around 02:00 to 23:00 (62.7mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
82th percentile
Low temperature
90th percentile
Rainfall
100th percentile
Wind
67th 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 20.9°C, versus 24.9°C on this specific day.
Sun & daylight
Sunrise
06:30
Sunset
19:38
Day length
13h 7m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Chicago.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 05:00 | 23.7 | 23.8 | 0 | 5 | SSE | 79 | 1013 |
| 01:00 | 06:00 | 23.6 | 23.9 | 0.06 | 4.8 | SSE | 80 | 1012 |
| 02:00 | 07:00 | 23.7 | 23.6 | 12.03 | 5.4 | SSE | 80 | 1013 |
| 03:00 | 08:00 | 24 | 23.9 | 13.81 | 5.5 | SSE | 79 | 1013 |
| 04:00 | 09:00 | 24 | 24.2 | 13.97 | 5.7 | SSE | 83 | 1012 |
| 05:00 | 10:00 | 22 | 24 | 10.6 | 2.7 | WSW | 91 | 1013 |
| 06:00 | 11:00 | 22 | 23.7 | 2.91 | 3.1 | SSW | 91 | 1014 |
| 07:00 | 12:00 | 21.8 | 23.5 | 0.88 | 3.3 | S | 92 | 1013 |
| 08:00 | 13:00 | 21.8 | 23.9 | 0.08 | 2.7 | SSE | 93 | 1013 |
| 09:00 | 14:00 | 21.3 | 22.9 | 0 | 3.1 | S | 93 | 1014 |
| 10:00 | 15:00 | 22.8 | 23.9 | 0 | 3.7 | SSE | 84 | 1015 |
| 11:00 | 16:00 | 24 | 24.8 | 0 | 4.4 | SSE | 80 | 1014 |
| 12:00 | 17:00 | 25.2 | 26.4 | 0 | 4.1 | S | 77 | 1013 |
| 13:00 | 18:00 | 26.7 | 26.9 | 0 | 6 | SW | 73 | 1013 |
| 14:00 | 19:00 | 27.8 | 28.7 | 0.05 | 5.5 | SW | 71 | 1013 |
| 15:00 | 20:00 | 28.1 | 29.6 | 0.05 | 4.8 | SW | 71 | 1013 |
| 16:00 | 21:00 | 29.7 | 32.2 | 0.01 | 3.6 | SW | 66 | 1013 |
| 17:00 | 22:00 | 29.1 | 32.3 | 0.03 | 3.4 | SW | 73 | 1012 |
| 18:00 | 23:00 | 29 | 33.6 | 0.02 | 2 | SW | 75 | 1012 |
| 19:00 | 00:00 | 28 | 32.3 | 0 | 1.7 | SW | 76 | 1012 |
| 20:00 | 01:00 | 27 | 30.7 | 0 | 2 | SSW | 78 | 1012 |
| 21:00 | 02:00 | 26 | 28.7 | 4.47 | 3 | SW | 79 | 1013 |
| 22:00 | 03:00 | 23.5 | 25.9 | 3.28 | 3.4 | SSW | 92 | 1014 |
| 23:00 | 04:00 | 22.8 | 24.9 | 0.41 | 3.4 | SSE | 93 | 1013 |
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
- West Branch — 41.750°, -91.250°, ERA5 grid cell center, 11.9 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 1 September 2018 specifically — not a monthly average. See the West Branch 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 West Branch, United States (41.75°N, 91.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for West Branch, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for West Branch, 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 West Branch, 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.