Home / Madison / 20 August 2017
Madison
United States · 20 August 2017
← 19 August 201721 August 2017 →
Average
21°C
low 16.6°C · high 24.9°C
Rainfall
0.2mm
dry day
Wind
3.9m/s
daily average
Humidity
81%
daily average
Cloud
50%
cover
Pressure
1013hPa
daily average
The temperature ranged from 16.6°C around 06:00 to 24.9°C around 13:00. Rain was recorded for one hour, around 00:00 (0.2mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
36th percentile
Low temperature
52th percentile
Rainfall
56th percentile
Wind
50th 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 21.5°C, versus 21°C on this specific day.
Sun & daylight
Sunrise
06:37
Sunset
20:23
Day length
13h 46m
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 | 19.8°C | 18.7°C | 0.13 | 5.3 | S | 86 | 1010 |
| 01:00 | 06:00 | 20°C | 19.3°C | 0 | 4.8 | S | 86 | 1010 |
| 02:00 | 07:00 | 19.8°C | 19.6°C | 0 | 3.9 | S | 86 | 1010 |
| 03:00 | 08:00 | 18.9°C | 19.1°C | 0 | 3.2 | S | 90 | 1010 |
| 04:00 | 09:00 | 17.8°C | 18.4°C | 0 | 2.5 | S | 94 | 1010 |
| 05:00 | 10:00 | 17°C | 18.3°C | 0 | 1.4 | WNW | 97 | 1011 |
| 06:00 | 11:00 | 16.6°C | 17.9°C | 0 | 1.1 | SE | 99 | 1011 |
| 07:00 | 12:00 | 17°C | 17.8°C | 0 | 2 | NE | 98 | 1012 |
| 08:00 | 13:00 | 17.8°C | 18.4°C | 0 | 3 | NE | 98 | 1012 |
| 09:00 | 14:00 | 20.2°C | 20.8°C | 0 | 3.7 | NE | 92 | 1013 |
| 10:00 | 15:00 | 23.8°C | 23.6°C | 0 | 5 | NE | 76 | 1013 |
| 11:00 | 16:00 | 23.9°C | 24.2°C | 0 | 4.3 | ENE | 75 | 1015 |
| 12:00 | 17:00 | 24.9°C | 25.8°C | 0 | 3.7 | ENE | 73 | 1014 |
| 13:00 | 18:00 | 24.9°C | 25.6°C | 0 | 3.7 | ENE | 71 | 1014 |
| 14:00 | 19:00 | 24.8°C | 25°C | 0 | 4.3 | ENE | 70 | 1014 |
| 15:00 | 20:00 | 24.4°C | 24.7°C | 0 | 3.8 | E | 70 | 1014 |
| 16:00 | 21:00 | 24.4°C | 25.5°C | 0.03 | 2.6 | ENE | 69 | 1014 |
| 17:00 | 22:00 | 24.2°C | 23.7°C | 0 | 5.1 | NE | 71 | 1014 |
| 18:00 | 23:00 | 23.1°C | 22.2°C | 0 | 5.2 | NE | 72 | 1015 |
| 19:00 | 00:00 | 22.1°C | 20.5°C | 0 | 5.4 | NE | 70 | 1015 |
| 20:00 | 01:00 | 22°C | 20°C | 0 | 5.2 | NE | 66 | 1015 |
| 21:00 | 02:00 | 20.7°C | 19.1°C | 0 | 4.6 | ENE | 70 | 1016 |
| 22:00 | 03:00 | 18.4°C | 17.1°C | 0 | 4.4 | ENE | 82 | 1016 |
| 23:00 | 04:00 | 18.3°C | 17.1°C | 0.02 | 4.2 | E | 83 | 1016 |
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
- Madison — 44.000°, -97.000°, ERA5 grid cell center, 9.1 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 20 August 2017 specifically — not a monthly average. See the Madison 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 Madison, United States (44.00°N, 97.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Madison, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 19, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Madison, 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 Madison, 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.