Home / Polson / 8 September 2017
Polson
United States · 8 September 2017
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Average
21.7°C
low 13.9°C · high 27.6°C
Rainfall
0.1mm
dry day
Wind
1m/s
daily average
Humidity
45.5%
daily average
Cloud
27%
cover
Pressure
1008hPa
daily average
The temperature ranged from 13.9°C around 07:00 to 27.6°C around 18:00. Rain was recorded for one hour, around 19:00 (0.1mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
72th percentile
Low temperature
84th percentile
Rainfall
64th percentile
Wind
27th 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 16.8°C, versus 21.7°C on this specific day.
Sun & daylight
Sunrise
07:05
Sunset
20:02
Day length
12h 58m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Denver.
Cumulative rainfall through the day.
| Local time | UTC | Temp | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 06:00 | 19.8°C | 18.9°C | 0 | 0.8 | NE | 48 | 1007 |
| 01:00 | 07:00 | 19.9°C | 19.3°C | 0 | 0.8 | ENE | 50 | 1007 |
| 02:00 | 08:00 | 19.1°C | 18.7°C | 0 | 0.5 | E | 54 | 1007 |
| 03:00 | 09:00 | 18.8°C | 18.8°C | 0 | 0.2 | NE | 58 | 1007 |
| 04:00 | 10:00 | 15.5°C | 15.4°C | 0 | 0.3 | NNW | 72 | 1008 |
| 05:00 | 11:00 | 14.6°C | 14.4°C | 0 | 0.5 | SW | 74 | 1008 |
| 06:00 | 12:00 | 14.1°C | 13.8°C | 0 | 0.6 | SSW | 76 | 1009 |
| 07:00 | 13:00 | 13.9°C | 13.6°C | 0 | 0.5 | SSW | 77 | 1009 |
| 08:00 | 14:00 | 16.2°C | 16.3°C | 0 | 0.7 | SSW | 75 | 1010 |
| 09:00 | 15:00 | 18.9°C | 18.5°C | 0 | 1 | SW | 60 | 1010 |
| 10:00 | 16:00 | 20.8°C | 19.3°C | 0 | 1.1 | SW | 41 | 1010 |
| 11:00 | 17:00 | 23.6°C | 21.6°C | 0 | 1.5 | SW | 32 | 1010 |
| 12:00 | 18:00 | 24.5°C | 22.4°C | 0 | 2 | SW | 32 | 1010 |
| 13:00 | 19:00 | 24.9°C | 22.8°C | 0 | 2.1 | SW | 32 | 1010 |
| 14:00 | 20:00 | 26.1°C | 24.2°C | 0 | 1.5 | WSW | 29 | 1009 |
| 15:00 | 21:00 | 27.1°C | 25.4°C | 0 | 1.4 | WSW | 27 | 1008 |
| 16:00 | 22:00 | 27.2°C | 25.9°C | 0 | 0.7 | WSW | 26 | 1008 |
| 17:00 | 23:00 | 27.3°C | 26.2°C | 0 | 0.3 | W | 26 | 1008 |
| 18:00 | 00:00 | 27.6°C | 26.5°C | 0 | 0.2 | SSW | 25 | 1007 |
| 19:00 | 01:00 | 27.3°C | 25.9°C | 0.1 | 0.9 | SSE | 27 | 1007 |
| 20:00 | 02:00 | 23.7°C | 22°C | 0.02 | 1.7 | SE | 35 | 1008 |
| 21:00 | 03:00 | 24.7°C | 23°C | 0 | 1.5 | SE | 32 | 1008 |
| 22:00 | 04:00 | 23.5°C | 22°C | 0 | 1.4 | SE | 37 | 1008 |
| 23:00 | 05:00 | 21.6°C | 21°C | 0 | 1 | SSE | 47 | 1009 |
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
- Polson — 47.750°, -114.250°, ERA5 grid cell center, 9.0 km from requested point
- Time zone
- America/Denver
- What's shown here
- The hourly and daily record for 8 September 2017 specifically — not a monthly average. See the Polson 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 Polson, United States (47.75°N, 114.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Polson, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Polson, 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 Polson, 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.