Home / Los Alamos / 28 September 2017
Los Alamos
United States · 28 September 2017
← 27 September 201729 September 2017 →
Average
9.6°C
low 4.5° · high 14.2°
Rainfall
12.9mm
rain recorded
Wind
1.6m/s
daily average
Humidity
88.4%
daily average
Cloud
85%
cover
Pressure
1022hPa
daily average
The temperature ranged from 4.5°C around 07:00 to 14.2°C around 13:00. Rain was recorded across 22 hours, from around 00:00 to 23:00 (12.9mm total).
How unusual was this day?
Compared against the same 135 calendar days (±7 days) across the other 9 years on file.
High temperature
1th percentile
Low temperature
19th percentile
Rainfall
99th percentile
Wind
53th 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 14.3°C, versus 9.6°C on this specific day.
Sun & daylight
Sunrise
06:57
Sunset
18:52
Day length
11h 55m
Hour by hour
Temperature (line) and hourly rainfall (bars), local time — America/Denver.
Cumulative rainfall through the day.
| Local time | UTC | Temp °C | Feels °C | Rain mm | Wind m/s | Dir | Humidity % | Pressure hPa |
|---|---|---|---|---|---|---|---|---|
| 00:00 | 06:00 | 6.8 | 5 | 1.3 | 1.4 | NNW | 98 | 1024 |
| 01:00 | 07:00 | 7.3 | 5.3 | 0.78 | 1.9 | NNW | 98 | 1024 |
| 02:00 | 08:00 | 7.2 | 5.1 | 0.79 | 1.9 | NNW | 98 | 1024 |
| 03:00 | 09:00 | 6.6 | 4.2 | 0.33 | 2.2 | N | 98 | 1023 |
| 04:00 | 10:00 | 5.6 | 3.2 | 0.26 | 2 | N | 99 | 1023 |
| 05:00 | 11:00 | 5.1 | 3.1 | 0.01 | 1.4 | N | 100 | 1022 |
| 06:00 | 12:00 | 5.2 | 3.3 | 0.1 | 1.1 | N | 99 | 1022 |
| 07:00 | 13:00 | 4.5 | 2.6 | 0.24 | 0.9 | NNW | 100 | 1023 |
| 08:00 | 14:00 | 5.5 | 3.5 | 0.27 | 1.3 | NNW | 99 | 1023 |
| 09:00 | 15:00 | 8.2 | 6.9 | 0.23 | 0.8 | N | 89 | 1023 |
| 10:00 | 16:00 | 10 | 8.9 | 0.11 | 0.7 | E | 84 | 1023 |
| 11:00 | 17:00 | 11.7 | 10.5 | 0.1 | 1 | SE | 77 | 1022 |
| 12:00 | 18:00 | 13.4 | 12.1 | 0.13 | 1.5 | SE | 74 | 1021 |
| 13:00 | 19:00 | 14.2 | 12.8 | 0.57 | 1.8 | SSE | 74 | 1020 |
| 14:00 | 20:00 | 13.9 | 12.1 | 1.26 | 2.4 | SSW | 74 | 1020 |
| 15:00 | 21:00 | 13.9 | 12.3 | 1.45 | 1.9 | SSW | 71 | 1019 |
| 16:00 | 22:00 | 14.1 | 12.7 | 0.18 | 2.1 | SSW | 76 | 1018 |
| 17:00 | 23:00 | 13.5 | 11.3 | 0.34 | 2.9 | SSW | 75 | 1019 |
| 18:00 | 00:00 | 13.6 | 11.8 | 0.09 | 2.4 | S | 77 | 1020 |
| 19:00 | 01:00 | 12.1 | 10.9 | 0.48 | 1.5 | SSE | 82 | 1020 |
| 20:00 | 02:00 | 10.5 | 9.2 | 1.65 | 1.2 | SW | 87 | 1021 |
| 21:00 | 03:00 | 8.9 | 7.9 | 0.18 | 1.1 | WSW | 97 | 1021 |
| 22:00 | 04:00 | 9.3 | 8.4 | 1.26 | 1 | SSW | 98 | 1022 |
| 23:00 | 05:00 | 9.3 | 8.4 | 0.78 | 1 | S | 97 | 1022 |
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
- Los Alamos — 36.000°, -106.250°, ERA5 grid cell center, 13.5 km from requested point
- Time zone
- America/Denver
- What's shown here
- The hourly and daily record for 28 September 2017 specifically — not a monthly average. See the Los Alamos 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 (2026-07-16). Historical climate data for Los Alamos, United States (36.00°N, 106.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Los Alamos, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 16, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Los Alamos, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 16, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Los Alamos, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-16},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.