Home / Frontenac / 7 September 2017
Frontenac
United States · 7 September 2017
← 6 September 20178 September 2017 →
Average
16.1°C
low 7.5° · high 23.8°
Rainfall
0mm
dry day
Wind
1.9m/s
daily average
Humidity
64.9%
daily average
Cloud
64%
cover
Pressure
1019hPa
daily average
The temperature ranged from 7.5°C around 06:00 to 23.8°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
9th percentile
Low temperature
2th percentile
Rainfall
50th percentile
Wind
31th 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 22.4°C, versus 16.1°C on this specific day.
Sun & daylight
Sunrise
06:36
Sunset
19:22
Day length
12h 46m
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 | 9.9 | 0 | 1.7 | SW | 81 | 1020 |
| 01:00 | 06:00 | 11.2 | 9.5 | 0 | 1.9 | SW | 83 | 1020 |
| 02:00 | 07:00 | 10.8 | 8.8 | 0 | 2.4 | WSW | 85 | 1020 |
| 03:00 | 08:00 | 10.1 | 8 | 0 | 2.4 | WSW | 90 | 1019 |
| 04:00 | 09:00 | 10.4 | 8.6 | 0 | 2.1 | WSW | 88 | 1020 |
| 05:00 | 10:00 | 7.6 | 5.9 | 0 | 1.4 | W | 96 | 1020 |
| 06:00 | 11:00 | 7.5 | 5.8 | 0 | 1.5 | WSW | 96 | 1020 |
| 07:00 | 12:00 | 7.8 | 6 | 0 | 1.6 | WSW | 95 | 1020 |
| 08:00 | 13:00 | 10.9 | 9.5 | 0 | 1.9 | WSW | 90 | 1020 |
| 09:00 | 14:00 | 14.8 | 14 | 0 | 1.7 | WSW | 80 | 1021 |
| 10:00 | 15:00 | 18.7 | 17.2 | 0 | 1.9 | WSW | 53 | 1021 |
| 11:00 | 16:00 | 20.6 | 18.8 | 0 | 2.4 | W | 47 | 1021 |
| 12:00 | 17:00 | 22 | 19.1 | 0 | 3.4 | WNW | 39 | 1021 |
| 13:00 | 18:00 | 22.2 | 19.3 | 0 | 3.3 | WNW | 39 | 1020 |
| 14:00 | 19:00 | 22.5 | 20.1 | 0 | 2.8 | W | 40 | 1019 |
| 15:00 | 20:00 | 23.3 | 20.9 | 0 | 2.8 | W | 38 | 1019 |
| 16:00 | 21:00 | 23.8 | 21.5 | 0 | 2.4 | W | 35 | 1019 |
| 17:00 | 22:00 | 23.5 | 22.2 | 0 | 1.7 | WNW | 40 | 1018 |
| 18:00 | 23:00 | 23.7 | 22.8 | 0 | 0.9 | WNW | 39 | 1018 |
| 19:00 | 00:00 | 21.6 | 21.4 | 0 | 0.6 | NNE | 49 | 1018 |
| 20:00 | 01:00 | 17.1 | 15.9 | 0 | 1 | E | 53 | 1018 |
| 21:00 | 02:00 | 15.9 | 14.3 | 0 | 1.3 | ESE | 57 | 1019 |
| 22:00 | 03:00 | 13.8 | 12.5 | 0 | 1.6 | SE | 74 | 1019 |
| 23:00 | 04:00 | 13.9 | 12.5 | 0 | 1.7 | SE | 72 | 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
- Frontenac — 38.750°, -90.500°, ERA5 grid cell center, 14.7 km from requested point
- Time zone
- America/Chicago
- What's shown here
- The hourly and daily record for 7 September 2017 specifically — not a monthly average. See the Frontenac 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 Frontenac, United States (38.75°N, 90.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Frontenac, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Frontenac, 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 Frontenac, 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.