Home / Willmar / 15 September 2021
Willmar
United States · 15 September 2021
← 14 September 202116 September 2021 →
Average
17.7°C
low 8.5° · high 25.1°
Rainfall
0.1mm
dry day
Wind
4.3m/s
daily average
Humidity
61.1%
daily average
Cloud
21%
cover
Pressure
1013hPa
daily average
The temperature ranged from 8.5°C around 05:00 to 25.1°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
51th percentile
Low temperature
13th percentile
Rainfall
57th percentile
Wind
59th 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 18.7°C, versus 17.7°C on this specific day.
Sun & daylight
Sunrise
06:59
Sunset
19:30
Day length
12h 31m
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 | 11.4 | 9.4 | 0 | 2.3 | WSW | 81 | 1014 |
| 01:00 | 06:00 | 11.2 | 9.1 | 0 | 2.3 | W | 82 | 1014 |
| 02:00 | 07:00 | 10.9 | 9 | 0 | 2.2 | WSW | 83 | 1014 |
| 03:00 | 08:00 | 10.3 | 8.4 | 0 | 2.1 | WSW | 86 | 1014 |
| 04:00 | 09:00 | 9.9 | 8 | 0 | 2.1 | WSW | 87 | 1015 |
| 05:00 | 10:00 | 8.5 | 6.3 | 0 | 2.2 | WSW | 89 | 1015 |
| 06:00 | 11:00 | 8.8 | 6.6 | 0 | 2 | SW | 88 | 1015 |
| 07:00 | 12:00 | 9.3 | 7 | 0 | 2.2 | SW | 85 | 1015 |
| 08:00 | 13:00 | 10.1 | 7.5 | 0 | 2.8 | SSW | 82 | 1015 |
| 09:00 | 14:00 | 13.3 | 11.4 | 0 | 2.5 | SSW | 75 | 1015 |
| 10:00 | 15:00 | 19.2 | 17.3 | 0 | 3 | S | 56 | 1015 |
| 11:00 | 16:00 | 21.4 | 18.7 | 0 | 3.8 | S | 49 | 1015 |
| 12:00 | 17:00 | 23.3 | 19.6 | 0 | 4.8 | S | 39 | 1014 |
| 13:00 | 18:00 | 23.8 | 19.4 | 0 | 5.5 | S | 35 | 1014 |
| 14:00 | 19:00 | 24 | 19.2 | 0 | 6.1 | S | 35 | 1013 |
| 15:00 | 20:00 | 25.1 | 20.2 | 0 | 6.5 | S | 35 | 1012 |
| 16:00 | 21:00 | 25.1 | 20.2 | 0 | 6.6 | S | 35 | 1011 |
| 17:00 | 22:00 | 24.8 | 20.3 | 0 | 6.2 | SSE | 37 | 1010 |
| 18:00 | 23:00 | 23.9 | 19.2 | 0 | 6.6 | SSE | 40 | 1009 |
| 19:00 | 00:00 | 23.2 | 19.2 | 0.05 | 5.7 | SSE | 44 | 1009 |
| 20:00 | 01:00 | 22.7 | 18.8 | 0.02 | 5.9 | SSE | 46 | 1010 |
| 21:00 | 02:00 | 21.6 | 17.9 | 0 | 6.1 | SSE | 53 | 1010 |
| 22:00 | 03:00 | 20.9 | 17.3 | 0 | 6.3 | SSE | 60 | 1010 |
| 23:00 | 04:00 | 21.1 | 17.6 | 0 | 6.6 | S | 62 | 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
- 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 15 September 2021 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 (2026-07-17). 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 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Willmar, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 17, 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 2026-07-17},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.