Home / Willmar / 20 September 2017
Willmar
United States · 20 September 2017
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Average
18.3°C
low 11.1°C · high 22°C
Rainfall
9.9mm
rain recorded
Wind
3.8m/s
daily average
Humidity
69.8%
daily average
Cloud
26%
cover
Pressure
1007hPa
daily average
The temperature ranged from 11.1°C around 23:00 to 22°C around 16:00. Rain was recorded across 4 hours, from around 00:00 to 03:00 (9.9mm 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
36th percentile
Rainfall
90th percentile
Wind
46th 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°C, versus 18.3°C on this specific day.
Sun & daylight
Sunrise
07:05
Sunset
19:20
Day length
12h 16m
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 | 21.9°C | 17.7°C | 0.71 | 10.4 | SSE | 81 | 998 |
| 01:00 | 06:00 | 21.7°C | 17.4°C | 4.03 | 11 | S | 86 | 998 |
| 02:00 | 07:00 | 19.5°C | 17.3°C | 3.83 | 7.5 | SSW | 94 | 1000 |
| 03:00 | 08:00 | 18.5°C | 18°C | 1.36 | 4.9 | SW | 98 | 1001 |
| 04:00 | 09:00 | 18.2°C | 19.2°C | 0 | 2.5 | SW | 99 | 1001 |
| 05:00 | 10:00 | 17.4°C | 17.8°C | 0 | 3.1 | WSW | 100 | 1002 |
| 06:00 | 11:00 | 16.9°C | 15.9°C | 0 | 4.6 | W | 100 | 1003 |
| 07:00 | 12:00 | 15.8°C | 14.4°C | 0 | 4.5 | WNW | 96 | 1004 |
| 08:00 | 13:00 | 14.5°C | 12.2°C | 0 | 4.6 | WNW | 91 | 1005 |
| 09:00 | 14:00 | 14.4°C | 11°C | 0 | 5.3 | WNW | 81 | 1007 |
| 10:00 | 15:00 | 16.9°C | 13°C | 0 | 5.3 | WNW | 60 | 1008 |
| 11:00 | 16:00 | 17.8°C | 14.4°C | 0 | 4.7 | NW | 58 | 1008 |
| 12:00 | 17:00 | 19.5°C | 16.3°C | 0 | 4.1 | WNW | 50 | 1009 |
| 13:00 | 18:00 | 20.6°C | 17.8°C | 0 | 3.9 | WNW | 50 | 1009 |
| 14:00 | 19:00 | 20.9°C | 18.5°C | 0 | 3.5 | WNW | 49 | 1010 |
| 15:00 | 20:00 | 21.5°C | 19.5°C | 0 | 2.6 | WNW | 45 | 1010 |
| 16:00 | 21:00 | 22°C | 20°C | 0 | 1.8 | W | 38 | 1010 |
| 17:00 | 22:00 | 20.9°C | 20.2°C | 0 | 0.5 | WSW | 46 | 1010 |
| 18:00 | 23:00 | 20.6°C | 19.4°C | 0 | 1.3 | S | 47 | 1011 |
| 19:00 | 00:00 | 21.3°C | 19.7°C | 0 | 1.3 | S | 40 | 1011 |
| 20:00 | 01:00 | 19.4°C | 18.3°C | 0 | 0.5 | SSE | 44 | 1011 |
| 21:00 | 02:00 | 16°C | 15.3°C | 0 | 0.1 | SSE | 57 | 1012 |
| 22:00 | 03:00 | 12.3°C | 11.2°C | 0 | 1.2 | ESE | 81 | 1013 |
| 23:00 | 04:00 | 11.1°C | 9.5°C | 0 | 1.8 | E | 86 | 1013 |
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
- Willmar — 45.000°, -95.000°, ERA5 grid cell center, 14.0 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 20 September 2017 specifically — not a monthly average. See the Willmar 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 Willmar, United States (45.00°N, 95.00°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Willmar, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Willmar, 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 Willmar, 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.