Home / Tomahawk / 18 August 2021
Tomahawk
United States · 18 August 2021
← 17 August 202119 August 2021 →
Average
21.6°C
low 15.3°C · high 28°C
Rainfall
0mm
dry day
Wind
2.4m/s
daily average
Humidity
73.6%
daily average
Cloud
18%
cover
Pressure
1018hPa
daily average
The temperature ranged from 15.3°C around 07:00 to 28°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
93th percentile
Low temperature
63th percentile
Rainfall
34th 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 18.8°C, versus 21.6°C on this specific day.
Sun & daylight
Sunrise
06:03
Sunset
20:00
Day length
13h 57m
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 | 17.8°C | 17.7°C | 0 | 2.6 | SSW | 86 | 1016 |
| 01:00 | 06:00 | 17.4°C | 17.3°C | 0 | 2.5 | SSW | 87 | 1016 |
| 02:00 | 07:00 | 17.1°C | 16.9°C | 0 | 2.5 | SSW | 87 | 1016 |
| 03:00 | 08:00 | 16.6°C | 16.4°C | 0 | 2.5 | SSW | 88 | 1017 |
| 04:00 | 09:00 | 16.5°C | 16.1°C | 0 | 2.7 | S | 89 | 1017 |
| 05:00 | 10:00 | 15.6°C | 15°C | 0 | 2.7 | SSW | 91 | 1018 |
| 06:00 | 11:00 | 16°C | 15.6°C | 0 | 2.5 | SSW | 90 | 1019 |
| 07:00 | 12:00 | 15.3°C | 14.8°C | 0 | 2.4 | SSW | 92 | 1019 |
| 08:00 | 13:00 | 17.2°C | 17.4°C | 0 | 2.1 | SSW | 87 | 1019 |
| 09:00 | 14:00 | 20.5°C | 21.2°C | 0 | 2.3 | SSW | 79 | 1019 |
| 10:00 | 15:00 | 23.5°C | 24.4°C | 0 | 2.4 | SSW | 69 | 1019 |
| 11:00 | 16:00 | 25.2°C | 26.4°C | 0 | 2.3 | SSW | 65 | 1019 |
| 12:00 | 17:00 | 26.5°C | 27.6°C | 0 | 2.3 | SSW | 59 | 1019 |
| 13:00 | 18:00 | 27°C | 27.9°C | 0 | 2.4 | S | 56 | 1019 |
| 14:00 | 19:00 | 27.6°C | 28.4°C | 0 | 2.5 | S | 54 | 1019 |
| 15:00 | 20:00 | 28°C | 28.5°C | 0 | 2.6 | SSW | 51 | 1018 |
| 16:00 | 21:00 | 28°C | 28.3°C | 0 | 2.6 | SSW | 50 | 1018 |
| 17:00 | 22:00 | 27.4°C | 27.8°C | 0 | 2.8 | SSW | 53 | 1018 |
| 18:00 | 23:00 | 26.8°C | 27.4°C | 0 | 2.6 | SSW | 55 | 1018 |
| 19:00 | 00:00 | 25.8°C | 27°C | 0 | 2.2 | S | 61 | 1018 |
| 20:00 | 01:00 | 23.2°C | 24.6°C | 0 | 1.9 | S | 72 | 1018 |
| 21:00 | 02:00 | 21.1°C | 22°C | 0 | 2 | S | 77 | 1019 |
| 22:00 | 03:00 | 19.7°C | 20.6°C | 0 | 2 | S | 82 | 1019 |
| 23:00 | 04:00 | 19°C | 19.9°C | 0 | 1.9 | S | 85 | 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
- 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 18 August 2021 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 (2026-07-20). 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 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Tomahawk, 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 Tomahawk, 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.