Home / Polson / 9 September 2017
Polson
United States · 9 September 2017
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Average
21.5°C
low 15.9°C · high 28.1°C
Rainfall
0.5mm
dry day
Wind
2.1m/s
daily average
Humidity
49.6%
daily average
Cloud
20%
cover
Pressure
1010hPa
daily average
The temperature ranged from 15.9°C around 04:00 to 28.1°C around 15:00. Rain was recorded for one hour, around 16:00 (0.5mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
79th percentile
Low temperature
96th percentile
Rainfall
74th percentile
Wind
79th 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 16.5°C, versus 21.5°C on this specific day.
Sun & daylight
Sunrise
07:06
Sunset
20:00
Day length
12h 54m
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 | 20.5°C | 19.8°C | 0 | 0.7 | S | 49 | 1009 |
| 01:00 | 07:00 | 19.7°C | 19.4°C | 0 | 0.5 | SSW | 53 | 1009 |
| 02:00 | 08:00 | 18.6°C | 18.4°C | 0 | 0.6 | SSW | 60 | 1009 |
| 03:00 | 09:00 | 17.9°C | 17.7°C | 0 | 0.6 | SW | 62 | 1009 |
| 04:00 | 10:00 | 15.9°C | 16°C | 0 | 0.5 | SSW | 76 | 1010 |
| 05:00 | 11:00 | 15.9°C | 16.1°C | 0 | 0.4 | SSW | 75 | 1010 |
| 06:00 | 12:00 | 16.5°C | 16.4°C | 0 | 0.8 | SSW | 73 | 1011 |
| 07:00 | 13:00 | 16.3°C | 16.1°C | 0 | 0.9 | SSW | 74 | 1011 |
| 08:00 | 14:00 | 18.1°C | 18.5°C | 0 | 0.9 | S | 74 | 1012 |
| 09:00 | 15:00 | 20.3°C | 20°C | 0 | 1.1 | SSW | 56 | 1012 |
| 10:00 | 16:00 | 20.2°C | 18.8°C | 0 | 1.7 | SSW | 49 | 1012 |
| 11:00 | 17:00 | 24.3°C | 22.1°C | 0 | 2.6 | SSW | 36 | 1011 |
| 12:00 | 18:00 | 25.2°C | 22.8°C | 0 | 3.3 | SW | 37 | 1011 |
| 13:00 | 19:00 | 25.9°C | 23.4°C | 0 | 3.6 | SW | 38 | 1011 |
| 14:00 | 20:00 | 27.1°C | 24.2°C | 0.01 | 4.2 | WSW | 35 | 1010 |
| 15:00 | 21:00 | 28.1°C | 25°C | 0 | 4.3 | WSW | 31 | 1010 |
| 16:00 | 22:00 | 25.3°C | 22.1°C | 0.53 | 3.9 | SW | 33 | 1009 |
| 17:00 | 23:00 | 25°C | 22.2°C | 0 | 3.6 | SW | 36 | 1009 |
| 18:00 | 00:00 | 26.2°C | 23°C | 0 | 3.9 | WSW | 32 | 1009 |
| 19:00 | 01:00 | 25.8°C | 23.3°C | 0 | 3 | WSW | 32 | 1010 |
| 20:00 | 02:00 | 23.1°C | 21.1°C | 0 | 2.5 | WSW | 40 | 1010 |
| 21:00 | 03:00 | 21°C | 18.8°C | 0 | 2.5 | WSW | 44 | 1012 |
| 22:00 | 04:00 | 20.6°C | 18.4°C | 0 | 2.6 | WSW | 45 | 1013 |
| 23:00 | 05:00 | 19.1°C | 17.1°C | 0 | 2.4 | WSW | 50 | 1014 |
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 9 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.