Home / Rock Rapids / 15 August 2018
Rock Rapids
United States · 15 August 2018
← 14 August 201816 August 2018 →
Average
21.5°C
low 17.8°C · high 26.8°C
Rainfall
1.4mm
rain recorded
Wind
2.3m/s
daily average
Humidity
88.1%
daily average
Cloud
77%
cover
Pressure
1013hPa
daily average
The temperature ranged from 17.8°C around 06:00 to 26.8°C around 16:00. Rain was recorded across 3 hours, from around 03:00 to 19:00 (1.4mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
44th percentile
Low temperature
65th percentile
Rainfall
73th percentile
Wind
14th 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 21.9°C, versus 21.5°C on this specific day.
Sun & daylight
Sunrise
06:29
Sunset
20:28
Day length
13h 58m
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 | 19.2°C | 20.2°C | 0 | 3.2 | NE | 100 | 1013 |
| 01:00 | 06:00 | 19.2°C | 20.1°C | 0 | 3.4 | NE | 99 | 1014 |
| 02:00 | 07:00 | 19.6°C | 20.6°C | 0.01 | 3.3 | NE | 97 | 1014 |
| 03:00 | 08:00 | 18.8°C | 19.9°C | 0.25 | 2.7 | NE | 97 | 1014 |
| 04:00 | 09:00 | 18.2°C | 19.2°C | 0 | 2.5 | NE | 99 | 1014 |
| 05:00 | 10:00 | 17.9°C | 18.5°C | 0 | 2.8 | NE | 97 | 1014 |
| 06:00 | 11:00 | 17.8°C | 18.2°C | 0 | 3 | NE | 98 | 1014 |
| 07:00 | 12:00 | 18°C | 18.6°C | 0 | 2.9 | NE | 97 | 1014 |
| 08:00 | 13:00 | 17.9°C | 17.9°C | 0 | 3.6 | NE | 97 | 1014 |
| 09:00 | 14:00 | 18.9°C | 19.5°C | 0 | 3.3 | NE | 96 | 1014 |
| 10:00 | 15:00 | 22.6°C | 23.8°C | 0 | 2.9 | ENE | 79 | 1014 |
| 11:00 | 16:00 | 23°C | 24.7°C | 0 | 2.5 | E | 80 | 1014 |
| 12:00 | 17:00 | 24.3°C | 26.5°C | 0.01 | 1.9 | E | 76 | 1014 |
| 13:00 | 18:00 | 24.7°C | 27.8°C | 0.02 | 1.2 | SE | 78 | 1014 |
| 14:00 | 19:00 | 24.8°C | 28.5°C | 0.05 | 0.8 | SE | 79 | 1014 |
| 15:00 | 20:00 | 26°C | 30.3°C | 0.04 | 0.5 | ESE | 78 | 1013 |
| 16:00 | 21:00 | 26.8°C | 31°C | 0.06 | 0.6 | ENE | 74 | 1013 |
| 17:00 | 22:00 | 25.1°C | 28.4°C | 0.05 | 1.1 | NNW | 77 | 1013 |
| 18:00 | 23:00 | 24.6°C | 27.4°C | 0.41 | 1.7 | NNE | 78 | 1013 |
| 19:00 | 00:00 | 23.2°C | 25.5°C | 0.46 | 2.2 | NNE | 83 | 1012 |
| 20:00 | 01:00 | 23.3°C | 26.2°C | 0 | 1 | N | 81 | 1013 |
| 21:00 | 02:00 | 22.3°C | 24.6°C | 0 | 1.6 | N | 84 | 1014 |
| 22:00 | 03:00 | 19.9°C | 21.5°C | 0 | 2.6 | NE | 96 | 1013 |
| 23:00 | 04:00 | 19.9°C | 21.2°C | 0 | 3 | ENE | 96 | 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
- Rock Rapids — 43.500°, -96.250°, ERA5 grid cell center, 10.1 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 15 August 2018 specifically — not a monthly average. See the Rock Rapids 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 (2026-07-21). Historical climate data for Rock Rapids, United States (43.50°N, 96.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Rock Rapids, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Rock Rapids, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 21, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Rock Rapids, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-21},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.