Home / Waterloo / 31 July 2017
Waterloo
United States · 31 July 2017
Average
21.5°C
low 14.4° · high 26.8°
Rainfall
0.1mm
dry day
Wind
1.9m/s
daily average
Humidity
71.2%
daily average
Cloud
33%
cover
Pressure
1021hPa
daily average
The temperature ranged from 14.4°C around 06:00 to 26.8°C around 15:00. 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
34th percentile
Low temperature
13th percentile
Rainfall
54th percentile
Wind
15th 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 22.9°C, versus 21.5°C on this specific day.
Sun & daylight
Sunrise
06:00
Sunset
20:29
Day length
14h 29m
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 | 17.4 | 17.4 | 0 | 2.4 | SSW | 87 | 1022 |
| 01:00 | 06:00 | 17.7 | 17.7 | 0 | 2.3 | S | 85 | 1022 |
| 02:00 | 07:00 | 18.4 | 18.4 | 0 | 2.2 | S | 80 | 1022 |
| 03:00 | 08:00 | 17.9 | 17.7 | 0 | 2.2 | S | 80 | 1022 |
| 04:00 | 09:00 | 17.2 | 17 | 0 | 2.2 | S | 83 | 1022 |
| 05:00 | 10:00 | 14.6 | 14.7 | 0 | 1.6 | S | 95 | 1022 |
| 06:00 | 11:00 | 14.4 | 14.5 | 0 | 1.5 | S | 94 | 1022 |
| 07:00 | 12:00 | 15.6 | 15.8 | 0 | 1.5 | S | 91 | 1023 |
| 08:00 | 13:00 | 17.8 | 18.7 | 0 | 1.5 | S | 89 | 1023 |
| 09:00 | 14:00 | 19.7 | 21 | 0 | 1.7 | S | 86 | 1023 |
| 10:00 | 15:00 | 24.1 | 24.4 | 0 | 1.8 | S | 56 | 1023 |
| 11:00 | 16:00 | 24.9 | 25.4 | 0 | 1.7 | SSW | 55 | 1022 |
| 12:00 | 17:00 | 26 | 26.9 | 0 | 1.2 | S | 52 | 1022 |
| 13:00 | 18:00 | 26.1 | 27 | 0 | 1.1 | S | 51 | 1022 |
| 14:00 | 19:00 | 26.6 | 27.3 | 0.02 | 1.7 | S | 51 | 1021 |
| 15:00 | 20:00 | 26.8 | 27.2 | 0 | 2.1 | S | 51 | 1021 |
| 16:00 | 21:00 | 26.6 | 27.2 | 0.05 | 2.2 | S | 54 | 1020 |
| 17:00 | 22:00 | 25.9 | 27 | 0.02 | 2 | S | 58 | 1020 |
| 18:00 | 23:00 | 25.6 | 26.2 | 0 | 2.4 | S | 58 | 1020 |
| 19:00 | 00:00 | 25.5 | 26.4 | 0 | 1.6 | SSE | 57 | 1020 |
| 20:00 | 01:00 | 24.6 | 26 | 0 | 1.5 | SSE | 63 | 1019 |
| 21:00 | 02:00 | 24 | 24.2 | 0 | 2.2 | SSE | 59 | 1019 |
| 22:00 | 03:00 | 19.2 | 19.8 | 0 | 2.7 | SSE | 88 | 1019 |
| 23:00 | 04:00 | 18.2 | 18.6 | 0 | 2.5 | ESE | 88 | 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
- Waterloo — 42.500°, -92.250°, ERA5 grid cell center, 7.7 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 31 July 2017 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 (2026-07-18). Historical climate data for Waterloo, United States (42.50°N, 92.25°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 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Waterloo, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 18, 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 2026-07-18},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.