Home / Jerome / 21 September 2017
Jerome
United States · 21 September 2017
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Average
8°C
low 6°C · high 9.5°C
Rainfall
8.6mm
rain recorded
Wind
2.4m/s
daily average
Humidity
78.5%
daily average
Cloud
100%
cover
Pressure
1009hPa
daily average
The temperature ranged from 6°C around 04:00 to 9.5°C around 16:00. Rain was recorded across 18 hours, from around 00:00 to 17:00 (8.6mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
0th percentile
Low temperature
7th percentile
Rainfall
99th percentile
Wind
41th 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 18.1°C, versus 8°C on this specific day.
Sun & daylight
Sunrise
07:24
Sunset
19:36
Day length
12h 12m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Boise.
Cumulative rainfall through the day.
| Local time | UTC | Temp | Feels | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 06:00 | 9.1°C | 6.4°C | 0.52 | 2.6 | SSW | 84 | 1007 |
| 01:00 | 07:00 | 8.9°C | 6.1°C | 1.06 | 2.6 | SSW | 83 | 1008 |
| 02:00 | 08:00 | 8.1°C | 5°C | 0.72 | 2.9 | SW | 85 | 1008 |
| 03:00 | 09:00 | 7.3°C | 4.2°C | 0.6 | 3 | SW | 86 | 1008 |
| 04:00 | 10:00 | 6°C | 2.6°C | 0.64 | 3.1 | SW | 92 | 1009 |
| 05:00 | 11:00 | 6.3°C | 2.7°C | 0.67 | 3.6 | SW | 92 | 1010 |
| 06:00 | 12:00 | 6.7°C | 3.7°C | 0.61 | 2.8 | SW | 92 | 1010 |
| 07:00 | 13:00 | 6.6°C | 3.6°C | 0.49 | 2.9 | SW | 92 | 1011 |
| 08:00 | 14:00 | 6.5°C | 3.8°C | 0.45 | 2.4 | WSW | 92 | 1011 |
| 09:00 | 15:00 | 7.2°C | 4.4°C | 0.42 | 2.3 | WSW | 85 | 1011 |
| 10:00 | 16:00 | 7.4°C | 4.5°C | 0.38 | 2.4 | W | 82 | 1011 |
| 11:00 | 17:00 | 7.7°C | 4.9°C | 0.34 | 2.1 | W | 77 | 1010 |
| 12:00 | 18:00 | 8.1°C | 5.5°C | 0.28 | 1.9 | WSW | 75 | 1010 |
| 13:00 | 19:00 | 8.4°C | 5.7°C | 0.38 | 2 | WSW | 75 | 1010 |
| 14:00 | 20:00 | 8.9°C | 6.1°C | 0.35 | 2.1 | WSW | 71 | 1009 |
| 15:00 | 21:00 | 9.3°C | 6.2°C | 0.24 | 2.2 | W | 62 | 1008 |
| 16:00 | 22:00 | 9.5°C | 6.7°C | 0.19 | 2.3 | W | 70 | 1008 |
| 17:00 | 23:00 | 9.2°C | 6.9°C | 0.11 | 1.5 | WSW | 69 | 1008 |
| 18:00 | 00:00 | 9.3°C | 6.4°C | 0.08 | 2.1 | WSW | 68 | 1008 |
| 19:00 | 01:00 | 9.5°C | 6.4°C | 0.06 | 2.4 | WSW | 67 | 1008 |
| 20:00 | 02:00 | 9.2°C | 6.7°C | 0.03 | 1.6 | WSW | 68 | 1009 |
| 21:00 | 03:00 | 8.1°C | 5.5°C | 0.02 | 1.8 | WSW | 74 | 1009 |
| 22:00 | 04:00 | 7.8°C | 5°C | 0 | 1.9 | WSW | 74 | 1009 |
| 23:00 | 05:00 | 6.8°C | 3.5°C | 0 | 2.4 | SW | 73 | 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
- Jerome — 42.750°, -114.500°, ERA5 grid cell center, 3.3 km from requested point
- Time zone
- America/Boise
- What's shown here
- The hourly and daily record for 21 September 2017 specifically — not a monthly average. See the Jerome 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 (2026-07-19). Historical climate data for Jerome, United States (42.75°N, 114.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Jerome, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 19, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Jerome, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 19, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Jerome, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-19},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.