Home / Tomahawk / 21 August 2017
Tomahawk
United States · 21 August 2017
← 20 August 201722 August 2017 →
Average
19.3°C
low 15.3°C · high 23.3°C
Rainfall
13.1mm
rain recorded
Wind
2.5m/s
daily average
Humidity
91.8%
daily average
Cloud
85%
cover
Pressure
1015hPa
daily average
The temperature ranged from 15.3°C around 05:00 to 23.3°C around 13:00. Rain was recorded across 12 hours, from around 12:00 to 23:00 (13.1mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
47th percentile
Low temperature
60th percentile
Rainfall
92th percentile
Wind
39th 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 19°C, versus 19.3°C on this specific day.
Sun & daylight
Sunrise
06:07
Sunset
19:55
Day length
13h 49m
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 | 19.4°C | 21.4°C | 0 | 1.9 | SW | 100 | 1017 |
| 01:00 | 06:00 | 18.3°C | 20.4°C | 0 | 1.1 | W | 100 | 1016 |
| 02:00 | 07:00 | 17.8°C | 19.6°C | 0 | 1.4 | WNW | 100 | 1016 |
| 03:00 | 08:00 | 16.6°C | 17.7°C | 0 | 1.6 | WNW | 100 | 1016 |
| 04:00 | 09:00 | 16.7°C | 17.9°C | 0 | 1.4 | NW | 100 | 1017 |
| 05:00 | 10:00 | 15.3°C | 15.8°C | 0 | 1.7 | NNE | 100 | 1017 |
| 06:00 | 11:00 | 15.4°C | 15.5°C | 0 | 2.4 | NNE | 100 | 1018 |
| 07:00 | 12:00 | 15.3°C | 15.3°C | 0 | 2.5 | NNE | 99 | 1018 |
| 08:00 | 13:00 | 16.4°C | 17.1°C | 0 | 1.9 | ENE | 98 | 1018 |
| 09:00 | 14:00 | 18.4°C | 18.9°C | 0 | 2.5 | ENE | 90 | 1018 |
| 10:00 | 15:00 | 20.2°C | 20.8°C | 0 | 2.6 | ESE | 82 | 1017 |
| 11:00 | 16:00 | 21.8°C | 22.5°C | 0 | 3.1 | SSE | 80 | 1017 |
| 12:00 | 17:00 | 23°C | 24.1°C | 0.1 | 3.2 | S | 78 | 1016 |
| 13:00 | 18:00 | 23.3°C | 24.4°C | 0.24 | 3.3 | SSW | 79 | 1015 |
| 14:00 | 19:00 | 22.7°C | 23.8°C | 0.15 | 3 | SW | 80 | 1014 |
| 15:00 | 20:00 | 22.3°C | 23.9°C | 0.2 | 2.7 | SW | 84 | 1013 |
| 16:00 | 21:00 | 21.9°C | 23.6°C | 0.4 | 2.4 | SSW | 86 | 1012 |
| 17:00 | 22:00 | 20.9°C | 23.2°C | 4.77 | 1.8 | SSW | 92 | 1012 |
| 18:00 | 23:00 | 20.9°C | 22.2°C | 0.72 | 3 | SSW | 91 | 1012 |
| 19:00 | 00:00 | 20.6°C | 21.2°C | 0.56 | 3.5 | SSW | 89 | 1011 |
| 20:00 | 01:00 | 19.6°C | 19.8°C | 1.72 | 3.7 | SSW | 91 | 1011 |
| 21:00 | 02:00 | 19.2°C | 19.3°C | 2.88 | 3.7 | SW | 92 | 1010 |
| 22:00 | 03:00 | 18.6°C | 19.6°C | 1.17 | 2.6 | WSW | 96 | 1010 |
| 23:00 | 04:00 | 17.9°C | 18.7°C | 0.21 | 2.5 | WSW | 97 | 1010 |
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
- Tomahawk — 45.500°, -89.750°, ERA5 grid cell center, 3.6 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 21 August 2017 specifically — not a monthly average. See the Tomahawk 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 (2026-07-19). Historical climate data for Tomahawk, United States (45.50°N, 89.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Tomahawk, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 19, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Tomahawk, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 19, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Tomahawk, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-19},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.