Home / Waterloo / 8 September 2023
Waterloo
United States · 8 September 2023
← 7 September 20239 September 2023 →
Average
19.7°C
low 17.1° · high 23°
Rainfall
0.5mm
dry day
Wind
2.6m/s
daily average
Humidity
77.9%
daily average
Cloud
68%
cover
Pressure
1016hPa
daily average
The temperature ranged from 17.1°C around 09:00 to 23°C around 17:00. Rain was recorded for one hour, around 10:00 (0.4mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
18th percentile
Low temperature
62th percentile
Rainfall
73th percentile
Wind
53th 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 21°C, versus 19.7°C on this specific day.
Sun & daylight
Sunrise
07:19
Sunset
20:05
Day length
12h 46m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Indiana/Indianapolis.
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 | 20.2 | 21.2 | 0 | 2.2 | NNW | 84 | 1014 |
| 01:00 | 05:00 | 19.6 | 20.2 | 0.01 | 2.4 | N | 83 | 1015 |
| 02:00 | 06:00 | 19 | 19.3 | 0.01 | 2.4 | N | 83 | 1015 |
| 03:00 | 07:00 | 18.7 | 18.9 | 0 | 2.3 | N | 83 | 1015 |
| 04:00 | 08:00 | 18.6 | 18.8 | 0 | 2.2 | N | 82 | 1015 |
| 05:00 | 09:00 | 18.2 | 18.1 | 0 | 2.3 | N | 81 | 1015 |
| 06:00 | 10:00 | 17.6 | 17.4 | 0.01 | 2.7 | NNE | 87 | 1015 |
| 07:00 | 11:00 | 17.5 | 17.3 | 0.03 | 2.6 | NNE | 86 | 1016 |
| 08:00 | 12:00 | 17.2 | 17.1 | 0.09 | 2.7 | NNE | 89 | 1016 |
| 09:00 | 13:00 | 17.1 | 17.2 | 0.02 | 2.5 | NNE | 90 | 1017 |
| 10:00 | 14:00 | 18 | 18.2 | 0.11 | 2.2 | N | 86 | 1017 |
| 11:00 | 15:00 | 19 | 19.2 | 0.05 | 2.4 | N | 82 | 1018 |
| 12:00 | 16:00 | 19.7 | 20 | 0.05 | 2.5 | N | 80 | 1018 |
| 13:00 | 17:00 | 21 | 21.4 | 0.03 | 2.3 | N | 74 | 1018 |
| 14:00 | 18:00 | 21.7 | 22 | 0.01 | 2.3 | NNW | 70 | 1017 |
| 15:00 | 19:00 | 22.2 | 22.6 | 0 | 2.1 | NNW | 66 | 1017 |
| 16:00 | 20:00 | 22.7 | 22.9 | 0 | 2.3 | NNW | 64 | 1016 |
| 17:00 | 21:00 | 23 | 23.1 | 0 | 2.4 | NNW | 62 | 1016 |
| 18:00 | 22:00 | 22.7 | 22 | 0 | 3 | NNW | 60 | 1016 |
| 19:00 | 23:00 | 21.8 | 21 | 0 | 3.6 | NNW | 65 | 1016 |
| 20:00 | 00:00 | 20.5 | 19.4 | 0 | 3.8 | NNW | 71 | 1016 |
| 21:00 | 01:00 | 19.6 | 18.8 | 0 | 3.6 | NNW | 76 | 1017 |
| 22:00 | 02:00 | 18.8 | 18.2 | 0 | 3.4 | N | 80 | 1018 |
| 23:00 | 03:00 | 18 | 17.5 | 0 | 3.2 | N | 84 | 1018 |
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
- Waterloo — 39.500°, -86.250°, ERA5 grid cell center, 8.3 km from requested point
- Time zone
- America/Indiana/Indianapolis
- What's shown here
- The hourly and daily record for 8 September 2023 specifically — not a monthly average. See the Waterloo 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 (2026-07-16). Historical climate data for Waterloo, United States (39.50°N, 86.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Waterloo, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 16, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Waterloo, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 16, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Waterloo, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-16},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.