Home / Waterloo / 31 July 2025
Waterloo
United States · 31 July 2025
Average
19.8°C
low 16.6°C · high 23.6°C
Rainfall
0mm
dry day
Wind
3.7m/s
daily average
Humidity
70.5%
daily average
Cloud
15%
cover
Pressure
1025hPa
daily average
The temperature ranged from 16.6°C around 05:00 to 23.6°C around 16:00. 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
7th percentile
Low temperature
36th percentile
Rainfall
44th percentile
Wind
69th 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 22.8°C, versus 19.8°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 | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 05:00 | 19.5°C | 19.5°C | 0 | 4 | NE | 90 | 1022 |
| 01:00 | 06:00 | 18.9°C | 18.9°C | 0 | 3.8 | NE | 92 | 1022 |
| 02:00 | 07:00 | 18.6°C | 18.4°C | 0 | 3.8 | NE | 92 | 1022 |
| 03:00 | 08:00 | 17.7°C | 16.9°C | 0 | 3.8 | NE | 90 | 1022 |
| 04:00 | 09:00 | 17.6°C | 16.5°C | 0 | 3.9 | NE | 86 | 1023 |
| 05:00 | 10:00 | 16.6°C | 16.2°C | 0 | 2.3 | NE | 83 | 1023 |
| 06:00 | 11:00 | 16.7°C | 15.9°C | 0 | 2.7 | NE | 83 | 1024 |
| 07:00 | 12:00 | 16.7°C | 15.7°C | 0 | 3.2 | NE | 84 | 1025 |
| 08:00 | 13:00 | 17.4°C | 16.4°C | 0 | 3.5 | NE | 83 | 1025 |
| 09:00 | 14:00 | 19.2°C | 18°C | 0 | 4.1 | ENE | 76 | 1025 |
| 10:00 | 15:00 | 20.6°C | 18.9°C | 0 | 4.5 | ENE | 68 | 1026 |
| 11:00 | 16:00 | 21°C | 18.9°C | 0 | 4.9 | ENE | 65 | 1026 |
| 12:00 | 17:00 | 22.4°C | 20.3°C | 0 | 4.8 | ENE | 59 | 1026 |
| 13:00 | 18:00 | 22.9°C | 20.8°C | 0 | 4.7 | ENE | 56 | 1026 |
| 14:00 | 19:00 | 23.1°C | 20.8°C | 0 | 4.7 | NE | 54 | 1025 |
| 15:00 | 20:00 | 23.3°C | 21°C | 0 | 4.6 | NE | 52 | 1025 |
| 16:00 | 21:00 | 23.6°C | 21.3°C | 0 | 4.4 | NE | 50 | 1025 |
| 17:00 | 22:00 | 22.7°C | 20.4°C | 0 | 3.9 | NE | 48 | 1025 |
| 18:00 | 23:00 | 22.5°C | 20.5°C | 0 | 3.6 | NE | 50 | 1025 |
| 19:00 | 00:00 | 21.4°C | 20.2°C | 0 | 2.9 | NE | 58 | 1025 |
| 20:00 | 01:00 | 20.7°C | 19.9°C | 0 | 2.3 | NNE | 59 | 1025 |
| 21:00 | 02:00 | 17.9°C | 16.8°C | 0 | 2.6 | NE | 69 | 1025 |
| 22:00 | 03:00 | 17.1°C | 15.8°C | 0 | 2.7 | NE | 72 | 1026 |
| 23:00 | 04:00 | 17°C | 15.8°C | 0 | 2.5 | ENE | 73 | 1027 |
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 2025 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 (2026-07-20). 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 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Waterloo, 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 Waterloo, 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.