Home / Prosper / 20 September 2017
Prosper
United States · 20 September 2017
← 19 September 201721 September 2017 →
Average
29.7°C
low 25.2° · high 35.3°
Rainfall
0.6mm
dry day
Wind
5.5m/s
daily average
Humidity
64.4%
daily average
Cloud
57%
cover
Pressure
1010hPa
daily average
The temperature ranged from 25.2°C around 07:00 to 35.3°C around 16:00. Rain was recorded for one hour, around 15:00 (0.6mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
94th percentile
Low temperature
100th percentile
Rainfall
75th percentile
Wind
98th 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 26.1°C, versus 29.7°C on this specific day.
Sun & daylight
Sunrise
07:13
Sunset
19:25
Day length
12h 12m
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 | 27.7 | 28.3 | 0 | 5.2 | S | 67 | 1009 |
| 01:00 | 06:00 | 27.1 | 27.7 | 0 | 5.2 | S | 70 | 1009 |
| 02:00 | 07:00 | 27.2 | 27.8 | 0 | 5.5 | S | 72 | 1010 |
| 03:00 | 08:00 | 26.8 | 27.1 | 0 | 6 | S | 74 | 1009 |
| 04:00 | 09:00 | 26.4 | 26.3 | 0 | 6.3 | S | 73 | 1009 |
| 05:00 | 10:00 | 25.4 | 26.6 | 0 | 5 | S | 81 | 1010 |
| 06:00 | 11:00 | 25.2 | 26.8 | 0 | 4.5 | S | 82 | 1011 |
| 07:00 | 12:00 | 25.2 | 26.4 | 0 | 4.9 | S | 82 | 1011 |
| 08:00 | 13:00 | 25.2 | 26.3 | 0 | 5.1 | S | 83 | 1012 |
| 09:00 | 14:00 | 26.4 | 26.4 | 0 | 6.9 | S | 78 | 1012 |
| 10:00 | 15:00 | 28.4 | 27.1 | 0 | 7.3 | SSW | 62 | 1012 |
| 11:00 | 16:00 | 29.5 | 29 | 0 | 6.9 | SSW | 61 | 1012 |
| 12:00 | 17:00 | 31.5 | 31.3 | 0 | 6.5 | SSW | 54 | 1012 |
| 13:00 | 18:00 | 32.6 | 32.9 | 0 | 6 | SSW | 53 | 1011 |
| 14:00 | 19:00 | 33.6 | 34.1 | 0 | 6 | S | 51 | 1010 |
| 15:00 | 20:00 | 34.7 | 34.4 | 0.56 | 6.8 | S | 47 | 1010 |
| 16:00 | 21:00 | 35.3 | 34.7 | 0 | 6.4 | S | 42 | 1009 |
| 17:00 | 22:00 | 34.1 | 36.9 | 0 | 5.1 | SSE | 59 | 1009 |
| 18:00 | 23:00 | 33.9 | 37.2 | 0 | 3.8 | SE | 57 | 1009 |
| 19:00 | 00:00 | 33.2 | 36 | 0 | 3.8 | SSE | 57 | 1009 |
| 20:00 | 01:00 | 32.1 | 34.2 | 0 | 3.9 | SSE | 57 | 1009 |
| 21:00 | 02:00 | 31.3 | 33 | 0 | 4.3 | SSE | 58 | 1010 |
| 22:00 | 03:00 | 30.8 | 32.6 | 0 | 4.8 | SSE | 63 | 1011 |
| 23:00 | 04:00 | 30.3 | 31.3 | 0 | 5.6 | SSE | 63 | 1011 |
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
- Prosper — 33.250°, -96.750°, ERA5 grid cell center, 5.0 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 Prosper 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 Prosper, United States (33.25°N, 96.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Prosper, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Prosper, 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 Prosper, 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.