Home / Marshalltown / 28 August 2017
Marshalltown
United States · 28 August 2017
← 27 August 201729 August 2017 →
Average
18.4°C
low 15°C · high 21.7°C
Rainfall
0.7mm
dry day
Wind
3.4m/s
daily average
Humidity
79.2%
daily average
Cloud
40%
cover
Pressure
1017hPa
daily average
The temperature ranged from 15°C around 06:00 to 21.7°C around 13:00. Rain was recorded across 4 hours, from around 11:00 to 14:00 (0.7mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
5th percentile
Low temperature
33th percentile
Rainfall
72th percentile
Wind
45th 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°C, versus 18.4°C on this specific day.
Sun & daylight
Sunrise
06:33
Sunset
19:51
Day length
13h 18m
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 | 17.6°C | 17.8°C | 0 | 2.3 | NNW | 89 | 1017 |
| 01:00 | 06:00 | 17.1°C | 17.2°C | 0 | 2.4 | NNW | 91 | 1017 |
| 02:00 | 07:00 | 17°C | 17°C | 0 | 2.8 | NNW | 93 | 1017 |
| 03:00 | 08:00 | 16.6°C | 16.3°C | 0 | 3 | NNW | 93 | 1017 |
| 04:00 | 09:00 | 16.5°C | 16.2°C | 0 | 3 | NNW | 95 | 1017 |
| 05:00 | 10:00 | 15.1°C | 14.4°C | 0 | 3.1 | NNW | 95 | 1017 |
| 06:00 | 11:00 | 15°C | 14.1°C | 0 | 3.2 | N | 95 | 1017 |
| 07:00 | 12:00 | 15°C | 14.2°C | 0 | 3.1 | N | 95 | 1018 |
| 08:00 | 13:00 | 15.8°C | 15°C | 0 | 3.4 | NNW | 94 | 1018 |
| 09:00 | 14:00 | 16.7°C | 15.2°C | 0 | 4.5 | N | 91 | 1018 |
| 10:00 | 15:00 | 19.8°C | 17.7°C | 0.03 | 4.5 | N | 67 | 1018 |
| 11:00 | 16:00 | 20.8°C | 18.5°C | 0.1 | 4.8 | N | 63 | 1018 |
| 12:00 | 17:00 | 21.5°C | 19°C | 0.18 | 4.7 | N | 58 | 1018 |
| 13:00 | 18:00 | 21.7°C | 19.6°C | 0.13 | 4.7 | N | 60 | 1018 |
| 14:00 | 19:00 | 21.3°C | 19.2°C | 0.1 | 4.8 | N | 63 | 1017 |
| 15:00 | 20:00 | 21.6°C | 20°C | 0.07 | 4.4 | N | 63 | 1018 |
| 16:00 | 21:00 | 21.4°C | 19.7°C | 0.04 | 4.3 | N | 62 | 1017 |
| 17:00 | 22:00 | 20.4°C | 19.3°C | 0.01 | 4.1 | N | 73 | 1017 |
| 18:00 | 23:00 | 20.6°C | 19.8°C | 0 | 3.6 | N | 70 | 1017 |
| 19:00 | 00:00 | 20°C | 19.5°C | 0 | 2.7 | N | 70 | 1017 |
| 20:00 | 01:00 | 19.7°C | 19.5°C | 0 | 2 | N | 68 | 1017 |
| 21:00 | 02:00 | 18.9°C | 18.7°C | 0 | 1.9 | N | 72 | 1017 |
| 22:00 | 03:00 | 15.9°C | 15.7°C | 0 | 2.2 | N | 89 | 1018 |
| 23:00 | 04:00 | 15.5°C | 15.1°C | 0 | 2.3 | N | 91 | 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
- Marshalltown — 42.000°, -93.000°, ERA5 grid cell center, 9.4 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 28 August 2017 specifically — not a monthly average. See the Marshalltown 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 Marshalltown, United States (42.00°N, 93.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Marshalltown, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 21, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Marshalltown, 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 Marshalltown, 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.