Home / Tomahawk / 21 August 2018
Tomahawk
United States · 21 August 2018
← 20 August 201822 August 2018 →
Average
17.2°C
low 12.7° · high 19.8°
Rainfall
0.1mm
dry day
Wind
4.2m/s
daily average
Humidity
74.5%
daily average
Cloud
71%
cover
Pressure
1016hPa
daily average
The temperature ranged from 12.7°C around 23:00 to 19.8°C around 15:00. 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
13th percentile
Low temperature
32th percentile
Rainfall
39th percentile
Wind
85th 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 18.6°C, versus 17.2°C on this specific day.
Sun & daylight
Sunrise
06:07
Sunset
19:56
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 °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 05:00 | 18.7 | 18.8 | 0 | 3.2 | NNE | 90 | 1015 |
| 01:00 | 06:00 | 18 | 18.1 | 0 | 3.3 | NNE | 95 | 1015 |
| 02:00 | 07:00 | 17.6 | 17.9 | 0.01 | 3.1 | NNE | 98 | 1014 |
| 03:00 | 08:00 | 17.3 | 17.6 | 0.01 | 3 | NNE | 99 | 1014 |
| 04:00 | 09:00 | 17 | 17 | 0 | 3.2 | NNE | 98 | 1014 |
| 05:00 | 10:00 | 16.4 | 15.3 | 0 | 3.9 | N | 91 | 1014 |
| 06:00 | 11:00 | 16.2 | 14.7 | 0 | 4.2 | N | 91 | 1014 |
| 07:00 | 12:00 | 16.1 | 14.4 | 0.01 | 4.5 | N | 91 | 1015 |
| 08:00 | 13:00 | 16.2 | 14.4 | 0.01 | 4.4 | N | 88 | 1015 |
| 09:00 | 14:00 | 16.5 | 14.6 | 0.01 | 4.6 | N | 85 | 1016 |
| 10:00 | 15:00 | 16.9 | 14.4 | 0 | 4.9 | N | 77 | 1016 |
| 11:00 | 16:00 | 17.8 | 14.9 | 0 | 5.3 | N | 72 | 1016 |
| 12:00 | 17:00 | 19.3 | 15.7 | 0 | 5.6 | N | 60 | 1016 |
| 13:00 | 18:00 | 19 | 14.7 | 0 | 6 | N | 54 | 1016 |
| 14:00 | 19:00 | 19.6 | 15.1 | 0 | 6.2 | N | 51 | 1016 |
| 15:00 | 20:00 | 19.8 | 15.5 | 0.02 | 5.9 | N | 51 | 1016 |
| 16:00 | 21:00 | 19.7 | 15.3 | 0 | 5.6 | N | 47 | 1016 |
| 17:00 | 22:00 | 18.4 | 14.5 | 0 | 5.1 | N | 54 | 1017 |
| 18:00 | 23:00 | 18.2 | 14.7 | 0 | 4.6 | N | 54 | 1018 |
| 19:00 | 00:00 | 17.4 | 14.3 | 0 | 4 | NNW | 56 | 1018 |
| 20:00 | 01:00 | 15.9 | 13.4 | 0 | 3 | NNW | 61 | 1018 |
| 21:00 | 02:00 | 14.3 | 12 | 0 | 2.6 | NW | 68 | 1019 |
| 22:00 | 03:00 | 13.1 | 11.3 | 0 | 2.4 | NW | 78 | 1019 |
| 23:00 | 04:00 | 12.7 | 10.8 | 0 | 2.5 | WNW | 80 | 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 21 August 2018 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 (2026-07-18). 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 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Tomahawk, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 18, 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 2026-07-18},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.